91 files changed, 4509 insertions, 1116 deletions
diff --git a/gl/m4/absolute-header.m4 b/gl/m4/absolute-header.m4
deleted file mode 100644
index 5b7a2fc3..00000000
--- a/gl/m4/absolute-header.m4
+++ /dev/null
@@ -1,49 +0,0 @@
-# absolute-header.m4 serial 7
-dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-dnl From Derek Price.
-# gl_ABSOLUTE_HEADER(HEADER1 HEADER2 ...)
-# ---------------------------------------
-# Find the absolute name of a header file, assuming the header exists.
-# If the header were sys/inttypes.h, this macro would define
-# ABSOLUTE_SYS_INTTYPES_H to the `""' quoted absolute name of sys/inttypes.h
-# in config.h
-# (e.g. `#define ABSOLUTE_SYS_INTTYPES_H "///usr/include/sys/inttypes.h"').
-# The three "///" are to pacify Sun C 5.8, which otherwise would say
-# "warning: #include of /usr/include/... may be non-portable".
-# Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
-AC_DEFUN([gl_ABSOLUTE_HEADER],
-[AC_LANG_PREPROC_REQUIRE()dnl
-AC_FOREACH([gl_HEADER_NAME], [$1],
-  [AS_VAR_PUSHDEF([gl_absolute_header],
-                  [gl_cv_absolute_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
-  AC_CACHE_CHECK([absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>],
-    m4_quote(m4_defn([gl_absolute_header])),
-    [AS_VAR_PUSHDEF([ac_header_exists],
-                    [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
-    AC_CHECK_HEADERS_ONCE(m4_quote(m4_defn([gl_HEADER_NAME])))dnl
-    if test AS_VAR_GET(ac_header_exists) = yes; then
-      AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]])])
-dnl eval is necessary to expand ac_cpp.
-dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
-      AS_VAR_SET(gl_absolute_header,
-[`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{
-        s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#
-        s#^/[^/]#//&#
-        p
-        q
-}'`])
-    fi
-    AS_VAR_POPDEF([ac_header_exists])dnl
-    ])dnl
-  AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_quote(m4_defn([gl_HEADER_NAME]))),
-                     ["AS_VAR_GET(gl_absolute_header)"],
-                     [Define this to an absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
-  AS_VAR_POPDEF([gl_absolute_header])dnl
-])dnl
-])# gl_ABSOLUTE_HEADER
diff --git a/gl/m4/alloca.m4 b/gl/m4/alloca.m4
index 95f54a6d..4b978e13 100644
--- a/gl/m4/alloca.m4
+++ b/gl/m4/alloca.m4
@@ -1,5 +1,5 @@
-# alloca.m4 serial 8
+# alloca.m4 serial 9
-dnl Copyright (C) 2002-2004, 2006, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2004, 2006, 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -26,7 +26,7 @@ AC_DEFUN([gl_FUNC_ALLOCA],
    ])
    if test $gl_cv_rpl_alloca = yes; then
      dnl OK, alloca can be implemented through a compiler built-in.
-      AC_DEFINE([HAVE_ALLOCA], 1,
+      AC_DEFINE([HAVE_ALLOCA], [1],
        [Define to 1 if you have 'alloca' after including <alloca.h>,
         a header that may be supplied by this distribution.])
      ALLOCA_H=alloca.h
diff --git a/gl/m4/arpa_inet_h.m4 b/gl/m4/arpa_inet_h.m4
index d01d0984..a6e63df0 100644
--- a/gl/m4/arpa_inet_h.m4
+++ b/gl/m4/arpa_inet_h.m4
@@ -1,18 +1,50 @@
-# arpa_inet_h.m4 serial 1
+# arpa_inet_h.m4 serial 5
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
-dnl Written by Simon Josefsson
+dnl Written by Simon Josefsson and Bruno Haible
 AC_DEFUN([gl_HEADER_ARPA_INET],
 [
+  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+  dnl once only, before all statements that occur in other macros.
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
  AC_CHECK_HEADERS_ONCE([arpa/inet.h])
  if test $ac_cv_header_arpa_inet_h = yes; then
-    ARPA_INET_H=''
+    HAVE_ARPA_INET_H=1
  else
    ARPA_INET_H='arpa/inet.h'
+    HAVE_ARPA_INET_H=0
  fi
-  AC_SUBST(ARPA_INET_H)
+  AC_SUBST([HAVE_ARPA_INET_H])
+  dnl Execute this unconditionally, because ARPA_INET_H may be set by other
+  dnl modules, after this code is executed.
+  gl_CHECK_NEXT_HEADERS([arpa/inet.h])
+])
+dnl Unconditionally enables the replacement of <arpa/inet.h>.
+AC_DEFUN([gl_REPLACE_ARPA_INET_H],
+[
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+  ARPA_INET_H='arpa/inet.h'
+])
+AC_DEFUN([gl_ARPA_INET_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+AC_DEFUN([gl_ARPA_INET_H_DEFAULTS],
+[
+  GNULIB_INET_NTOP=0;     AC_SUBST([GNULIB_INET_NTOP])
+  GNULIB_INET_PTON=0;     AC_SUBST([GNULIB_INET_PTON])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_INET_NTOP=1;  AC_SUBST([HAVE_DECL_INET_NTOP])
+  HAVE_DECL_INET_PTON=1;  AC_SUBST([HAVE_DECL_INET_PTON])
+  ARPA_INET_H='';         AC_SUBST([ARPA_INET_H])
 ])
diff --git a/gl/m4/btowc.m4 b/gl/m4/btowc.m4
new file mode 100644
index 00000000..64ff8290
--- /dev/null
+++ b/gl/m4/btowc.m4
@@ -0,0 +1,68 @@
+# btowc.m4 serial 3
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_BTOWC],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([btowc])
+  if test $ac_cv_func_btowc = no; then
+    HAVE_BTOWC=0
+  else
+    dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF.
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([gt_LOCALE_FR])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether btowc(EOF) is correct],
+      [gl_cv_func_btowc_eof],
+      [
+        dnl Initial guess, used when cross-compiling or when no suitable locale
+        dnl is present.
+changequote(,)dnl
+        case "$host_os" in
+                 # Guess no on IRIX.
+          irix*) gl_cv_func_btowc_eof="guessing no" ;;
+                 # Guess yes otherwise.
+          *)     gl_cv_func_btowc_eof="guessing yes" ;;
+        esac
+changequote([,])dnl
+        if test $LOCALE_FR != none; then
+          AC_TRY_RUN([
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (btowc (EOF) != WEOF)
+        return 1;
+    }
+  return 0;
+}],
+            [gl_cv_func_btowc_eof=yes],
+            [gl_cv_func_btowc_eof=no],
+            [])
+        fi
+      ])
+    case "$gl_cv_func_btowc_eof" in
+      *yes) ;;
+      *) REPLACE_BTOWC=1 ;;
+    esac
+  fi
+  if test $HAVE_BTOWC = 0 || test $REPLACE_BTOWC = 1; then
+    gl_REPLACE_WCHAR_H
+    AC_LIBOBJ([btowc])
+    gl_PREREQ_BTOWC
+  fi
+])
+# Prerequisites of lib/btowc.c.
+AC_DEFUN([gl_PREREQ_BTOWC], [
+  :
+])
diff --git a/gl/m4/c-strtod.m4 b/gl/m4/c-strtod.m4
index 7f206c71..0514f2d4 100644
--- a/gl/m4/c-strtod.m4
+++ b/gl/m4/c-strtod.m4
@@ -1,6 +1,6 @@
-# c-strtod.m4 serial 9
+# c-strtod.m4 serial 10
-# Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2005, 2006, 2009 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -29,7 +29,7 @@ AC_DEFUN([gl_C99_STRTOLD],
       [gl_cv_func_c99_strtold=yes],
       [gl_cv_func_c99_strtold=no])])
  if test $gl_cv_func_c99_strtold = yes; then
-    AC_DEFINE([HAVE_C99_STRTOLD], 1, [Define to 1 if strtold conforms to C99.])
+    AC_DEFINE([HAVE_C99_STRTOLD], [1], [Define to 1 if strtold conforms to C99.])
  fi
 ])
diff --git a/gl/m4/codeset.m4 b/gl/m4/codeset.m4
index 223955b4..413217bd 100644
--- a/gl/m4/codeset.m4
+++ b/gl/m4/codeset.m4
@@ -1,5 +1,5 @@
-# codeset.m4 serial 2 (gettext-0.16)
+# codeset.m4 serial 4 (gettext-0.18)
-dnl Copyright (C) 2000-2002, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,14 +8,14 @@ dnl From Bruno Haible.
 AC_DEFUN([AM_LANGINFO_CODESET],
 [
-  AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
+  AC_CACHE_CHECK([for nl_langinfo and CODESET], [am_cv_langinfo_codeset],
    [AC_TRY_LINK([#include <langinfo.h>],
      [char* cs = nl_langinfo(CODESET); return !cs;],
-      am_cv_langinfo_codeset=yes,
+      [am_cv_langinfo_codeset=yes],
-      am_cv_langinfo_codeset=no)
+      [am_cv_langinfo_codeset=no])
    ])
  if test $am_cv_langinfo_codeset = yes; then
-    AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
+    AC_DEFINE([HAVE_LANGINFO_CODESET], [1],
      [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
  fi
 ])
diff --git a/gl/m4/double-slash-root.m4 b/gl/m4/double-slash-root.m4
index 69d60d01..8c6841bc 100644
--- a/gl/m4/double-slash-root.m4
+++ b/gl/m4/double-slash-root.m4
@@ -1,5 +1,5 @@
-# double-slash-root.m4 serial 2   -*- Autoconf -*-
+# double-slash-root.m4 serial 4   -*- Autoconf -*-
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -24,15 +24,15 @@ AC_DEFUN([gl_DOUBLE_SLASH_ROOT],
            gl_cv_double_slash_root='unknown, assuming no' ;;
        esac
      else
-        set x `ls -di / //`
+        set x `ls -di / // 2>/dev/null`
-        if test $[2] = $[4] && wc //dev/null >/dev/null 2>&1; then
+        if test "$[2]" = "$[4]" && wc //dev/null >/dev/null 2>&1; then
          gl_cv_double_slash_root=no
        else
          gl_cv_double_slash_root=yes
        fi
      fi])
  if test "$gl_cv_double_slash_root" = yes; then
-    AC_DEFINE([DOUBLE_SLASH_IS_DISTINCT_ROOT], 1,
+    AC_DEFINE([DOUBLE_SLASH_IS_DISTINCT_ROOT], [1],
      [Define to 1 if // is a file system root distinct from /.])
  fi
 ])
diff --git a/gl/m4/eoverflow.m4 b/gl/m4/eoverflow.m4
deleted file mode 100644
index 3bffd10e..00000000
--- a/gl/m4/eoverflow.m4
+++ /dev/null
@@ -1,70 +0,0 @@
-# eoverflow.m4 serial 2
-dnl Copyright (C) 2004, 2006 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-dnl From Bruno Haible.
-# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
-# POSIX.  But some systems (like AIX 3) don't define it, and some systems
-# (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
-# Define EOVERFLOW as a C macro and as a substituted macro in such a way that
-# 1. on all systems, after inclusion of <errno.h>, EOVERFLOW is usable,
-# 2. on systems where EOVERFLOW is defined elsewhere, we use the same numeric
-#    value.
-AC_DEFUN([gl_EOVERFLOW],
-[
-  AC_REQUIRE([AC_PROG_CC])dnl
-  AC_CACHE_CHECK([for EOVERFLOW], ac_cv_decl_EOVERFLOW, [
-    AC_EGREP_CPP(yes,[
-#include <errno.h>
-#ifdef EOVERFLOW
-yes
-#endif
-      ], have_eoverflow=1)
-    if test -n "$have_eoverflow"; then
-      dnl EOVERFLOW exists in <errno.h>. Don't need to define EOVERFLOW ourselves.
-      ac_cv_decl_EOVERFLOW=yes
-    else
-      AC_EGREP_CPP(yes,[
-#define _XOPEN_SOURCE_EXTENDED 1
-#include <errno.h>
-#ifdef EOVERFLOW
-yes
-#endif
-        ], have_eoverflow=1)
-      if test -n "$have_eoverflow"; then
-        dnl EOVERFLOW exists but is hidden.
-        dnl Define it to the same value.
-        AC_COMPUTE_INT([ac_cv_decl_EOVERFLOW], [EOVERFLOW], [
-#define _XOPEN_SOURCE_EXTENDED 1
-#include <errno.h>
-/* The following two lines are a workaround against an autoconf-2.52 bug.  */
-#include <stdio.h>
-#include <stdlib.h>
-])
-      else
-        dnl EOVERFLOW isn't defined by the system. Define EOVERFLOW ourselves, but
-        dnl don't define it as EINVAL, because snprintf() callers want to
-        dnl distinguish EINVAL and EOVERFLOW.
-        ac_cv_decl_EOVERFLOW=E2BIG
-      fi
-    fi
-  ])
-  if test "$ac_cv_decl_EOVERFLOW" != yes; then
-    AC_DEFINE_UNQUOTED([EOVERFLOW], [$ac_cv_decl_EOVERFLOW],
-                       [Define as good substitute value for EOVERFLOW.])
-    EOVERFLOW="$ac_cv_decl_EOVERFLOW"
-    AC_SUBST(EOVERFLOW)
-  fi
-])
-dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
-dnl Remove this when we can assume autoconf >= 2.61.
-m4_ifdef([AC_COMPUTE_INT], [], [
-  AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
-])
diff --git a/gl/m4/errno_h.m4 b/gl/m4/errno_h.m4
new file mode 100644
index 00000000..0682d1ab
--- /dev/null
+++ b/gl/m4/errno_h.m4
@@ -0,0 +1,119 @@
+# errno_h.m4 serial 3
+dnl Copyright (C) 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_HEADER_ERRNO_H],
+[
+  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+  dnl once only, before all statements that occur in other macros.
+  AC_REQUIRE([gl_HEADER_ERRNO_H_BODY])
+])
+AC_DEFUN([gl_HEADER_ERRNO_H_BODY],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
+    AC_EGREP_CPP([booboo],[
+#include <errno.h>
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+      ],
+      [gl_cv_header_errno_h_complete=no],
+      [gl_cv_header_errno_h_complete=yes])
+  ])
+  if test $gl_cv_header_errno_h_complete = yes; then
+    ERRNO_H=''
+  else
+    gl_CHECK_NEXT_HEADERS([errno.h])
+    ERRNO_H='errno.h'
+  fi
+  AC_SUBST([ERRNO_H])
+  gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
+  gl_REPLACE_ERRNO_VALUE([ENOLINK])
+  gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
+])
+# Assuming $1 = EOVERFLOW.
+# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
+# POSIX.  But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
+# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
+# Check for the value of EOVERFLOW.
+# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
+AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
+[
+  if test -n "$ERRNO_H"; then
+    AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
+      AC_EGREP_CPP([yes],[
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+      ],
+      [gl_cv_header_errno_h_]$1[=yes],
+      [gl_cv_header_errno_h_]$1[=no])
+      if test $gl_cv_header_errno_h_]$1[ = no; then
+        AC_EGREP_CPP([yes],[
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+          ], [gl_cv_header_errno_h_]$1[=hidden])
+        if test $gl_cv_header_errno_h_]$1[ = hidden; then
+          dnl The macro exists but is hidden.
+          dnl Define it to the same value.
+          AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+])
+        fi
+      fi
+    ])
+    case $gl_cv_header_errno_h_]$1[ in
+      yes | no)
+        ]$1[_HIDDEN=0; ]$1[_VALUE=
+        ;;
+      *)
+        ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
+        ;;
+    esac
+    AC_SUBST($1[_HIDDEN])
+    AC_SUBST($1[_VALUE])
+  fi
+])
+dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
+dnl Remove this when we can assume autoconf >= 2.61.
+m4_ifdef([AC_COMPUTE_INT], [], [
+  AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
+])
diff --git a/gl/m4/extensions.m4 b/gl/m4/extensions.m4
index bcbb3cee..611fcfdb 100644
--- a/gl/m4/extensions.m4
+++ b/gl/m4/extensions.m4
@@ -1,7 +1,7 @@
-# serial 5  -*- Autoconf -*-
+# serial 6  -*- Autoconf -*-
 # Enable extensions on systems that normally disable them.
-# Copyright (C) 2003, 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2006-2008 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -24,6 +24,8 @@ AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
 [AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
 AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
+  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
  if test "$MINIX" = yes; then
    AC_DEFINE([_POSIX_SOURCE], [1],
@@ -36,6 +38,16 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
      [Define to 1 if on MINIX.])
  fi
+  dnl HP-UX 11.11 defines mbstate_t only if _XOPEN_SOURCE is defined to 500,
+  dnl regardless of whether the flags -Ae or _D_HPUX_SOURCE=1 are already
+  dnl provided.
+  case "$host_os" in
+    hpux*)
+      AC_DEFINE([_XOPEN_SOURCE], [500],
+        [Define to 500 only on HP-UX.])
+      ;;
+  esac
  AH_VERBATIM([__EXTENSIONS__],
 [/* Enable extensions on AIX 3, Interix.  */
 #ifndef _ALL_SOURCE
@@ -61,9 +73,9 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
  AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
    [ac_cv_safe_to_define___extensions__],
    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM([
+       [AC_LANG_PROGRAM([[
 #         define __EXTENSIONS__ 1
-          AC_INCLUDES_DEFAULT])],
+          ]AC_INCLUDES_DEFAULT])],
       [ac_cv_safe_to_define___extensions__=yes],
       [ac_cv_safe_to_define___extensions__=no])])
  test $ac_cv_safe_to_define___extensions__ = yes &&
diff --git a/gl/m4/fcntl_h.m4 b/gl/m4/fcntl_h.m4
new file mode 100644
index 00000000..4a7fc42b
--- /dev/null
+++ b/gl/m4/fcntl_h.m4
@@ -0,0 +1,94 @@
+# Configure fcntl.h.
+dnl Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl Written by Paul Eggert.
+AC_DEFUN([gl_FCNTL_H],
+[
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+           #include <sys/stat.h>
+           #include <unistd.h>
+           #include <fcntl.h>
+           #ifndef O_NOATIME
+            #define O_NOATIME 0
+           #endif
+           #ifndef O_NOFOLLOW
+            #define O_NOFOLLOW 0
+           #endif
+           static int const constants[] =
+            {
+              O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
+              O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
+            };
+          ]],
+          [[
+            int status = !constants;
+            {
+              static char const sym[] = "conftest.sym";
+              if (symlink (".", sym) != 0
+                  || close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0)
+                status |= 32;
+            }
+            {
+              static char const file[] = "confdefs.h";
+              int fd = open (file, O_RDONLY | O_NOATIME);
+              char c;
+              struct stat st0, st1;
+              if (fd < 0
+                  || fstat (fd, &st0) != 0
+                  || sleep (1) != 0
+                  || read (fd, &c, 1) != 1
+                  || close (fd) != 0
+                  || stat (file, &st1) != 0
+                  || st0.st_atime != st1.st_atime)
+                status |= 64;
+            }
+            return status;]])],
+       [gl_cv_header_working_fcntl_h=yes],
+       [case $? in #(
+        32) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
+        64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
+        96) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
+         *) gl_cv_header_working_fcntl_h='no';;
+        esac],
+       [gl_cv_header_working_fcntl_h=cross-compiling])])
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val],
+    [Define to 1 if O_NOATIME works.])
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
+    [Define to 1 if O_NOFOLLOW works.])
+  gl_CHECK_NEXT_HEADERS([fcntl.h])
+  FCNTL_H='fcntl.h'
+  AC_SUBST([FCNTL_H])
+])
+AC_DEFUN([gl_FCNTL_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+AC_DEFUN([gl_FCNTL_H_DEFAULTS],
+[
+  GNULIB_OPEN=0;  AC_SUBST([GNULIB_OPEN])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  REPLACE_OPEN=0; AC_SUBST([REPLACE_OPEN])
+])
diff --git a/gl/m4/fsusage.m4 b/gl/m4/fsusage.m4
index 18eedbca..8b8cbf72 100644
--- a/gl/m4/fsusage.m4
+++ b/gl/m4/fsusage.m4
@@ -1,7 +1,7 @@
-#serial 23
+# serial 24
 # Obtaining file system usage information.
-# Copyright (C) 1997, 1998, 2000, 2001, 2003-2007 Free Software Foundation, Inc.
+# Copyright (C) 1997-1998, 2000-2001, 2003-2009 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -11,16 +11,16 @@
 AC_DEFUN([gl_FSUSAGE],
 [
-  AC_CHECK_HEADERS_ONCE(sys/param.h)
+  AC_CHECK_HEADERS_ONCE([sys/param.h])
-  AC_CHECK_HEADERS_ONCE(sys/vfs.h sys/fs_types.h)
+  AC_CHECK_HEADERS_ONCE([sys/vfs.h sys/fs_types.h])
-  AC_CHECK_HEADERS(sys/mount.h, [], [],
+  AC_CHECK_HEADERS([sys/mount.h], [], [],
    [AC_INCLUDES_DEFAULT
     [#if HAVE_SYS_PARAM_H
       #include <sys/param.h>
      #endif]])
  gl_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no])
  if test $gl_cv_fs_space = yes; then
-    AC_LIBOBJ(fsusage)
+    AC_LIBOBJ([fsusage])
    gl_PREREQ_FSUSAGE_EXTRA
  fi
 ])
@@ -38,21 +38,21 @@ AC_MSG_NOTICE([checking how to get file system space usage])
 ac_fsusage_space=no
 # Perform only the link test since it seems there are no variants of the
-# statvfs function.  This check is more than just AC_CHECK_FUNCS(statvfs)
+# statvfs function.  This check is more than just AC_CHECK_FUNCS([statvfs])
 # because that got a false positive on SCO OSR5.  Adding the declaration
 # of a `struct statvfs' causes this test to fail (as it should) on such
 # systems.  That system is reported to work fine with STAT_STATFS4 which
 # is what it gets when this test fails.
 if test $ac_fsusage_space = no; then
  # SVR4
-  AC_CACHE_CHECK([for statvfs function (SVR4)], fu_cv_sys_stat_statvfs,
+  AC_CACHE_CHECK([for statvfs function (SVR4)], [fu_cv_sys_stat_statvfs],
                 [AC_TRY_LINK([#include <sys/types.h>
-#if defined __GLIBC__ && !defined __BEOS__
+#if defined __GLIBC__ && defined __linux__
-Do not use statvfs on systems with GNU libc, because that function stats
+Do not use statvfs on systems with GNU libc on Linux, because that function
-all preceding entries in /proc/mounts, and that makes df hang if even
+stats all preceding entries in /proc/mounts, and that makes df hang if even
 one of the corresponding file systems is hard-mounted, but not available.
-statvfs in GNU libc on BeOS operates differently: it only makes a system
+statvfs in GNU libc on Hurd, BeOS, Haiku operates differently: it only makes
-call.
+a system call.
 #endif
 #ifdef __osf__
@@ -65,7 +65,7 @@ call.
                              fu_cv_sys_stat_statvfs=no)])
  if test $fu_cv_sys_stat_statvfs = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATVFS, 1,
+    AC_DEFINE([STAT_STATVFS], [1],
              [  Define if there is a function named statvfs.  (SVR4)])
  fi
 fi
@@ -73,7 +73,7 @@ fi
 if test $ac_fsusage_space = no; then
  # DEC Alpha running OSF/1
  AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
-  AC_CACHE_VAL(fu_cv_sys_stat_statfs3_osf1,
+  AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1],
  [AC_TRY_RUN([
 #include <sys/param.h>
 #include <sys/types.h>
@@ -88,10 +88,10 @@ if test $ac_fsusage_space = no; then
  fu_cv_sys_stat_statfs3_osf1=yes,
  fu_cv_sys_stat_statfs3_osf1=no,
  fu_cv_sys_stat_statfs3_osf1=no)])
-  AC_MSG_RESULT($fu_cv_sys_stat_statfs3_osf1)
+  AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1])
  if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATFS3_OSF1, 1,
+    AC_DEFINE([STAT_STATFS3_OSF1], [1],
              [   Define if  statfs takes 3 args.  (DEC Alpha running OSF/1)])
  fi
 fi
@@ -100,7 +100,7 @@ if test $ac_fsusage_space = no; then
 # AIX
  AC_MSG_CHECKING([for two-argument statfs with statfs.bsize dnl
 member (AIX, 4.3BSD)])
-  AC_CACHE_VAL(fu_cv_sys_stat_statfs2_bsize,
+  AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize],
  [AC_TRY_RUN([
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -121,10 +121,10 @@ member (AIX, 4.3BSD)])
  fu_cv_sys_stat_statfs2_bsize=yes,
  fu_cv_sys_stat_statfs2_bsize=no,
  fu_cv_sys_stat_statfs2_bsize=no)])
-  AC_MSG_RESULT($fu_cv_sys_stat_statfs2_bsize)
+  AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize])
  if test $fu_cv_sys_stat_statfs2_bsize = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATFS2_BSIZE, 1,
+    AC_DEFINE([STAT_STATFS2_BSIZE], [1],
 [  Define if statfs takes 2 args and struct statfs has a field named f_bsize.
   (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
  fi
@@ -133,7 +133,7 @@ fi
 if test $ac_fsusage_space = no; then
 # SVR3
  AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
-  AC_CACHE_VAL(fu_cv_sys_stat_statfs4,
+  AC_CACHE_VAL([fu_cv_sys_stat_statfs4],
  [AC_TRY_RUN([#include <sys/types.h>
 #include <sys/statfs.h>
  int
@@ -145,10 +145,10 @@ if test $ac_fsusage_space = no; then
    fu_cv_sys_stat_statfs4=yes,
    fu_cv_sys_stat_statfs4=no,
    fu_cv_sys_stat_statfs4=no)])
-  AC_MSG_RESULT($fu_cv_sys_stat_statfs4)
+  AC_MSG_RESULT([$fu_cv_sys_stat_statfs4])
  if test $fu_cv_sys_stat_statfs4 = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATFS4, 1,
+    AC_DEFINE([STAT_STATFS4], [1],
              [  Define if statfs takes 4 args.  (SVR3, Dynix, Irix, Dolphin)])
  fi
 fi
@@ -157,7 +157,7 @@ if test $ac_fsusage_space = no; then
 # 4.4BSD and NetBSD
  AC_MSG_CHECKING([for two-argument statfs with statfs.fsize dnl
 member (4.4BSD and NetBSD)])
-  AC_CACHE_VAL(fu_cv_sys_stat_statfs2_fsize,
+  AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize],
  [AC_TRY_RUN([#include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -175,10 +175,10 @@ member (4.4BSD and NetBSD)])
  fu_cv_sys_stat_statfs2_fsize=yes,
  fu_cv_sys_stat_statfs2_fsize=no,
  fu_cv_sys_stat_statfs2_fsize=no)])
-  AC_MSG_RESULT($fu_cv_sys_stat_statfs2_fsize)
+  AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize])
  if test $fu_cv_sys_stat_statfs2_fsize = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATFS2_FSIZE, 1,
+    AC_DEFINE([STAT_STATFS2_FSIZE], [1],
 [  Define if statfs takes 2 args and struct statfs has a field named f_fsize.
   (4.4BSD, NetBSD)])
  fi
@@ -187,7 +187,7 @@ fi
 if test $ac_fsusage_space = no; then
  # Ultrix
  AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
-  AC_CACHE_VAL(fu_cv_sys_stat_fs_data,
+  AC_CACHE_VAL([fu_cv_sys_stat_fs_data],
  [AC_TRY_RUN([#include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -209,10 +209,10 @@ if test $ac_fsusage_space = no; then
  fu_cv_sys_stat_fs_data=yes,
  fu_cv_sys_stat_fs_data=no,
  fu_cv_sys_stat_fs_data=no)])
-  AC_MSG_RESULT($fu_cv_sys_stat_fs_data)
+  AC_MSG_RESULT([$fu_cv_sys_stat_fs_data])
  if test $fu_cv_sys_stat_fs_data = yes; then
    ac_fsusage_space=yes
-    AC_DEFINE(STAT_STATFS2_FS_DATA, 1,
+    AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
 [  Define if statfs takes 2 args and the second argument has
   type struct fs_data.  (Ultrix)])
  fi
@@ -222,7 +222,7 @@ if test $ac_fsusage_space = no; then
  # SVR2
  AC_TRY_CPP([#include <sys/filsys.h>
    ],
-    AC_DEFINE(STAT_READ_FILSYS, 1,
+    AC_DEFINE([STAT_READ_FILSYS], [1],
      [Define if there is no specific function for reading file systems usage
       information and you have the <sys/filsys.h> header file.  (SVR2)])
    ac_fsusage_space=yes)
@@ -239,7 +239,7 @@ AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
 AC_DEFUN([gl_STATFS_TRUNCATES],
 [
  AC_MSG_CHECKING([for statfs that truncates block counts])
-  AC_CACHE_VAL(fu_cv_sys_truncating_statfs,
+  AC_CACHE_VAL([fu_cv_sys_truncating_statfs],
  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #if !defined(sun) && !defined(__sun)
 choke -- this is a workaround for a Sun-specific problem
@@ -251,19 +251,19 @@ choke -- this is a workaround for a Sun-specific problem
    [fu_cv_sys_truncating_statfs=yes],
    [fu_cv_sys_truncating_statfs=no])])
  if test $fu_cv_sys_truncating_statfs = yes; then
-    AC_DEFINE(STATFS_TRUNCATES_BLOCK_COUNTS, 1,
+    AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
      [Define if the block counts reported by statfs may be truncated to 2GB
       and the correct values may be stored in the f_spare array.
       (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
       SunOS 4.1.1 seems not to be affected.)])
  fi
-  AC_MSG_RESULT($fu_cv_sys_truncating_statfs)
+  AC_MSG_RESULT([$fu_cv_sys_truncating_statfs])
 ])
 # Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
 AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
 [
-  AC_CHECK_HEADERS(dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h)
+  AC_CHECK_HEADERS([dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h])
  gl_STATFS_TRUNCATES
 ])
diff --git a/gl/m4/getaddrinfo.m4 b/gl/m4/getaddrinfo.m4
index 5d36c195..40886719 100644
--- a/gl/m4/getaddrinfo.m4
+++ b/gl/m4/getaddrinfo.m4
@@ -1,5 +1,5 @@
-# getaddrinfo.m4 serial 15
+# getaddrinfo.m4 serial 20
-dnl Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2004-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -7,11 +7,23 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_GETADDRINFO],
 [
  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
+  AC_REQUIRE([gl_HEADER_NETDB])dnl for HAVE_NETDB_H
  AC_MSG_NOTICE([checking how to do getaddrinfo, freeaddrinfo and getnameinfo])
+  GETADDRINFO_LIB=
+  gai_saved_LIBS="$LIBS"
-  AC_CHECK_HEADERS_ONCE(netdb.h)
+  dnl Where is getaddrinfo()?
+  dnl - On Solaris, it is in libsocket.
+  dnl - On Haiku, it is in libnetwork.
+  dnl - On BeOS, it is in libnet.
+  dnl - On native Windows, it is in ws2_32.dll.
+  dnl - Otherwise it is in libc.
+  AC_SEARCH_LIBS([getaddrinfo], [socket network net],
+    [if test "$ac_cv_search_getaddrinfo" != "none required"; then
+       GETADDRINFO_LIB="$ac_cv_search_getaddrinfo"
+     fi])
+  LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
-  AC_SEARCH_LIBS(getaddrinfo, [nsl socket])
  AC_CACHE_CHECK([for getaddrinfo], [gl_cv_func_getaddrinfo], [
    AC_TRY_LINK([
 #include <sys/types.h>
@@ -26,7 +38,7 @@ AC_DEFUN([gl_GETADDRINFO],
      [gl_cv_func_getaddrinfo=yes],
      [gl_cv_func_getaddrinfo=no])])
  if test $gl_cv_func_getaddrinfo = no; then
-    AC_CACHE_CHECK(for getaddrinfo in ws2tcpip.h and -lws2_32,
+    AC_CACHE_CHECK([for getaddrinfo in ws2tcpip.h and -lws2_32],
                   gl_cv_w32_getaddrinfo, [
      gl_cv_w32_getaddrinfo=no
      am_save_LIBS="$LIBS"
@@ -37,11 +49,13 @@ AC_DEFUN([gl_GETADDRINFO],
 #endif
 #include <stddef.h>
 ], [getaddrinfo(NULL, NULL, NULL, NULL);], gl_cv_w32_getaddrinfo=yes)
-    LIBS="$am_save_LIBS"])
+      LIBS="$am_save_LIBS"
+    ])
    if test "$gl_cv_w32_getaddrinfo" = "yes"; then
-      LIBS="$LIBS -lws2_32"
+      GETADDRINFO_LIB="-lws2_32"
+      LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
    else
-      AC_LIBOBJ(getaddrinfo)
+      AC_LIBOBJ([getaddrinfo])
    fi
  fi
@@ -66,40 +80,34 @@ AC_DEFUN([gl_GETADDRINFO],
        [gl_cv_func_gai_strerror=yes],
        [gl_cv_func_gai_strerror=no])])
  if test $gl_cv_func_gai_strerror = no; then
-    AC_LIBOBJ(gai_strerror)
+    AC_LIBOBJ([gai_strerror])
  fi
+  LIBS="$gai_saved_LIBS"
  gl_PREREQ_GETADDRINFO
+  AC_SUBST([GETADDRINFO_LIB])
 ])
-# Prerequisites of lib/getaddrinfo.h and lib/getaddrinfo.c.
+# Prerequisites of lib/netdb.in.h and lib/getaddrinfo.c.
 AC_DEFUN([gl_PREREQ_GETADDRINFO], [
+  AC_REQUIRE([gl_NETDB_H_DEFAULTS])
  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
-  AC_SEARCH_LIBS(gethostbyname, [inet nsl])
+  AC_REQUIRE([gl_HOSTENT]) dnl for HOSTENT_LIB
-  AC_SEARCH_LIBS(getservbyname, [inet nsl socket xnet])
+  AC_REQUIRE([gl_SERVENT]) dnl for SERVENT_LIB
-  AC_CHECK_FUNCS(gethostbyname,, [
-    AC_CACHE_CHECK(for gethostbyname in winsock2.h and -lws2_32,
-                   gl_cv_w32_gethostbyname, [
-      gl_cv_w32_gethostbyname=no
-      am_save_LIBS="$LIBS"
-      LIBS="$LIBS -lws2_32"
-      AC_TRY_LINK([
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif
-#include <stddef.h>
-], [gethostbyname(NULL);], gl_cv_w32_gethostbyname=yes)
-    LIBS="$am_save_LIBS"])
-    if test "$gl_cv_w32_gethostbyname" = "yes"; then
-      LIBS="$LIBS -lws2_32"
-    fi
-    ])
  AC_REQUIRE([AC_C_RESTRICT])
  AC_REQUIRE([gl_SOCKET_FAMILIES])
  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
  AC_REQUIRE([AC_C_INLINE])
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-  AC_CHECK_HEADERS_ONCE(netinet/in.h netdb.h)
+  dnl Including sys/socket.h is wrong for Windows, but Windows does not
+  dnl have sa_len so the result is correct anyway.
+  AC_CHECK_MEMBERS([struct sockaddr.sa_len], , , [#include <sys/socket.h>])
+  AC_CHECK_HEADERS_ONCE([netinet/in.h])
  AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, gai_strerror, getnameinfo],,,[
  /* sys/types.h is not needed according to POSIX, but the
     sys/socket.h in i386-unknown-freebsd4.10 and
@@ -115,6 +123,19 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
 #include <ws2tcpip.h>
 #endif
 ])
+  if test $ac_cv_have_decl_getaddrinfo = no; then
+    HAVE_DECL_GETADDRINFO=0
+  fi
+  if test $ac_cv_have_decl_freeaddrinfo = no; then
+    HAVE_DECL_FREEADDRINFO=0
+  fi
+  if test $ac_cv_have_decl_gai_strerror = no; then
+    HAVE_DECL_GAI_STRERROR=0
+  fi
+  if test $ac_cv_have_decl_getnameinfo = no; then
+    HAVE_DECL_GETNAMEINFO=0
+  fi
  AC_CHECK_TYPES([struct addrinfo],,,[
 #include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
@@ -127,4 +148,19 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
 #include <ws2tcpip.h>
 #endif
 ])
+  if test $ac_cv_type_struct_addrinfo = no; then
+    HAVE_STRUCT_ADDRINFO=0
+  fi
+  dnl Append $HOSTENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
+  case " $GETADDRINFO_LIB " in
+    *" $HOSTENT_LIB "*) ;;
+    *) GETADDRINFO_LIB="$GETADDRINFO_LIB $HOSTENT_LIB" ;;
+  esac
+  dnl Append $SERVENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
+  case " $GETADDRINFO_LIB " in
+    *" $SERVENT_LIB "*) ;;
+    *) GETADDRINFO_LIB="$GETADDRINFO_LIB $SERVENT_LIB" ;;
+  esac
 ])
diff --git a/gl/m4/gethostname.m4 b/gl/m4/gethostname.m4
index 1e9749d3..6b6fca95 100644
--- a/gl/m4/gethostname.m4
+++ b/gl/m4/gethostname.m4
@@ -1,18 +1,21 @@
-# gethostname.m4 serial 2
+# gethostname.m4 serial 5
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl Copyright (C) 2002, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_GETHOSTNAME],
 [
-  AC_REPLACE_FUNCS(gethostname)
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  gl_PREREQ_SYS_H_WINSOCK2
+  AC_REPLACE_FUNCS([gethostname])
  if test $ac_cv_func_gethostname = no; then
+    HAVE_GETHOSTNAME=0
    gl_PREREQ_GETHOSTNAME
  fi
 ])
 # Prerequisites of lib/gethostname.c.
 AC_DEFUN([gl_PREREQ_GETHOSTNAME], [
-  AC_CHECK_FUNCS(uname)
+  AC_CHECK_FUNCS([uname])
 ])
diff --git a/gl/m4/getloadavg.m4 b/gl/m4/getloadavg.m4
index c1547c74..015bcac2 100644
--- a/gl/m4/getloadavg.m4
+++ b/gl/m4/getloadavg.m4
@@ -1,7 +1,7 @@
 # Check for getloadavg.
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2002, 2003,
-# 2006 Free Software Foundation, Inc.
+# 2006, 2008, 2009 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -13,7 +13,12 @@
 # gl_GETLOADAVG(LIBOBJDIR)
 # ------------------------
 AC_DEFUN([gl_GETLOADAVG],
-[gl_have_func=no # yes means we've found a way to get the load average.
+[AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+# Persuade glibc <stdlib.h> to declare getloadavg().
+AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+gl_have_func=no # yes means we've found a way to get the load average.
 # Make sure getloadavg.c is where it belongs, at configure-time.
 test -f "$srcdir/$1/getloadavg.c" ||
@@ -22,17 +27,17 @@ test -f "$srcdir/$1/getloadavg.c" ||
 gl_save_LIBS=$LIBS
 # Check for getloadavg, but be sure not to touch the cache variable.
-(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_have_func=yes
+(AC_CHECK_FUNC([getloadavg], [exit 0], [exit 1])) && gl_have_func=yes
 # On HPUX9, an unprivileged user can get load averages through this function.
-AC_CHECK_FUNCS(pstat_getdynamic)
+AC_CHECK_FUNCS([pstat_getdynamic])
 # Solaris has libkstat which does not require root.
-AC_CHECK_LIB(kstat, kstat_open)
+AC_CHECK_LIB([kstat], [kstat_open])
 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
 # AIX has libperfstat which does not require root
-AC_CHECK_LIB(perfstat, perfstat_cpu_total)
+AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
 test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
 # Some systems with -lutil have (and need) -lkvm as well, some do not.
@@ -40,12 +45,12 @@ test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
 # to get the right answer into the cache.
 # For kstat on solaris, we need libelf to force the definition of SVR4 below.
 if test $gl_have_func = no; then
-  AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
+  AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
 fi
 if test $gl_have_func = no; then
-  AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
+  AC_CHECK_LIB([kvm], [kvm_open], [LIBS="-lkvm $LIBS"])
  # Check for the 4.4BSD definition of getloadavg.
-  AC_CHECK_LIB(util, getloadavg,
+  AC_CHECK_LIB([util], [getloadavg],
    [LIBS="-lutil $LIBS" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
 fi
@@ -54,17 +59,17 @@ if test $gl_have_func = no; then
  # Since it is not a standard part of AIX, it might be installed locally.
  gl_getloadavg_LIBS=$LIBS
  LIBS="-L/usr/local/lib $LIBS"
-  AC_CHECK_LIB(getloadavg, getloadavg,
+  AC_CHECK_LIB([getloadavg], [getloadavg],
               [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
 fi
 # Make sure it is really in the library, if we think we found it,
 # otherwise set up the replacement function.
-AC_CHECK_FUNCS(getloadavg, [],
+AC_CHECK_FUNCS([getloadavg], [],
               [gl_PREREQ_GETLOADAVG])
 # Some definitions of getloadavg require that the program be installed setgid.
-AC_CACHE_CHECK(whether getloadavg requires setgid,
+AC_CACHE_CHECK([whether getloadavg requires setgid],
               gl_cv_func_getloadavg_setgid,
 [AC_EGREP_CPP([Yowza Am I SETGID yet],
 [#define CONFIGURING_GETLOADAVG
@@ -77,16 +82,16 @@ Yowza Am I SETGID yet
              gl_cv_func_getloadavg_setgid=no)])
 if test $gl_cv_func_getloadavg_setgid = yes; then
  NEED_SETGID=true
-  AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
+  AC_DEFINE([GETLOADAVG_PRIVILEGED], [1],
            [Define to 1 if the `getloadavg' function needs to be run setuid
             or setgid.])
 else
  NEED_SETGID=false
 fi
-AC_SUBST(NEED_SETGID)dnl
+AC_SUBST([NEED_SETGID])dnl
 if test $gl_cv_func_getloadavg_setgid = yes; then
-  AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
+  AC_CACHE_CHECK([group of /dev/kmem], [gl_cv_group_kmem],
 [ # On Solaris, /dev/kmem is a symlink.  Get info on the real file.
  ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
  # If we got an error (system does not support symlinks), try without -L.
@@ -96,7 +101,7 @@ if test $gl_cv_func_getloadavg_setgid = yes; then
               s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\)  *.*/\1/
               / /s/.* //;p']`
 ])
-  AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
+  AC_SUBST([KMEM_GROUP], [$gl_cv_group_kmem])dnl
 fi
 if test "x$gl_save_LIBS" = x; then
  GETLOADAVG_LIBS=$LIBS
@@ -105,7 +110,21 @@ else
 fi
 LIBS=$gl_save_LIBS
-AC_SUBST(GETLOADAVG_LIBS)dnl
+AC_SUBST([GETLOADAVG_LIBS])dnl
+# Test whether the system declares getloadavg. Solaris has the function
+# but declares it in <sys/loadavg.h>, not <stdlib.h>.
+AC_CHECK_HEADERS([sys/loadavg.h])
+if test $ac_cv_header_sys_loadavg_h = yes; then
+  HAVE_SYS_LOADAVG_H=1
+else
+  HAVE_SYS_LOADAVG_H=0
+fi
+AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
+  [#if HAVE_SYS_LOADAVG_H
+   # include <sys/loadavg.h>
+   #endif
+   #include <stdlib.h>])
 ])# gl_GETLOADAVG
@@ -113,44 +132,44 @@ AC_SUBST(GETLOADAVG_LIBS)dnl
 # --------------------
 # Set up the AC_LIBOBJ replacement of `getloadavg'.
 AC_DEFUN([gl_PREREQ_GETLOADAVG],
-[AC_LIBOBJ(getloadavg)
+[AC_LIBOBJ([getloadavg])
-AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
+AC_DEFINE([C_GETLOADAVG], [1], [Define to 1 if using `getloadavg.c'.])
 # Figure out what our getloadavg.c needs.
 gl_have_func=no
-AC_CHECK_HEADER(sys/dg_sys_info.h,
+AC_CHECK_HEADER([sys/dg_sys_info.h],
 [gl_have_func=yes
- AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
+ AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
- AC_CHECK_LIB(dgc, dg_sys_info)])
+ AC_CHECK_LIB([dgc], [dg_sys_info])])
 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
 # uses stabs), but it is still SVR4.  We cannot check for <elf.h> because
 # Irix 4.0.5F has the header but not the library.
 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
  gl_have_func=yes
-  AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
+  AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
 fi
 if test $gl_have_func = no; then
-  AC_CHECK_HEADER(inq_stats/cpustats.h,
+  AC_CHECK_HEADER([inq_stats/cpustats.h],
  [gl_have_func=yes
-   AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
+   AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
-   AC_DEFINE(UMAX4_3, 1,
+   AC_DEFINE([UMAX4_3], [1],
             [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
              instead of <sys/cpustats.h>.])])
 fi
 if test $gl_have_func = no; then
-  AC_CHECK_HEADER(sys/cpustats.h,
+  AC_CHECK_HEADER([sys/cpustats.h],
-  [gl_have_func=yes; AC_DEFINE(UMAX)])
+  [gl_have_func=yes; AC_DEFINE([UMAX])])
 fi
 if test $gl_have_func = no; then
-  AC_CHECK_HEADERS(mach/mach.h)
+  AC_CHECK_HEADERS([mach/mach.h])
 fi
-AC_CHECK_HEADERS(nlist.h,
+AC_CHECK_HEADERS([nlist.h],
 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
-                  [AC_DEFINE(NLIST_NAME_UNION, 1,
+                  [AC_DEFINE([NLIST_NAME_UNION], [1],
                             [Define to 1 if your `struct nlist' has an
                              `n_un' member.  Obsolete, depend on
                              `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
diff --git a/gl/m4/getopt.m4 b/gl/m4/getopt.m4
index c0a73b2c..9b683c2f 100644
--- a/gl/m4/getopt.m4
+++ b/gl/m4/getopt.m4
@@ -1,5 +1,5 @@
-# getopt.m4 serial 13
+# getopt.m4 serial 14
-dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -46,7 +46,7 @@ AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
  if test -z "$GETOPT_H"; then
    AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
      [AC_RUN_IFELSE(
-        [AC_LANG_PROGRAM([#include <getopt.h>],
+        [AC_LANG_PROGRAM([[#include <getopt.h>]],
           [[
             char *myargv[3];
             myargv[0] = "conftest";
diff --git a/gl/m4/gettext.m4 b/gl/m4/gettext.m4
index c9ae1f7d..d90c8500 100644
--- a/gl/m4/gettext.m4
+++ b/gl/m4/gettext.m4
@@ -1,5 +1,5 @@
-# gettext.m4 serial 60 (gettext-0.17)
+# gettext.m4 serial 62 (gettext-0.18)
-dnl Copyright (C) 1995-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -123,11 +123,11 @@ AC_DEFUN([AM_GNU_GETTEXT],
    gt_use_preinstalled_gnugettext=no
    ifelse(gt_included_intl, yes, [
      AC_MSG_CHECKING([whether included gettext is requested])
-      AC_ARG_WITH(included-gettext,
+      AC_ARG_WITH([included-gettext],
        [  --with-included-gettext use the GNU gettext library included here],
        nls_cv_force_use_gnu_gettext=$withval,
        nls_cv_force_use_gnu_gettext=no)
-      AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
+      AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
      nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
      if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
@@ -267,7 +267,7 @@ return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_a
    if test "$gt_use_preinstalled_gnugettext" = "yes" \
       || test "$nls_cv_use_gnu_gettext" = "yes"; then
-      AC_DEFINE(ENABLE_NLS, 1,
+      AC_DEFINE([ENABLE_NLS], [1],
        [Define to 1 if translation of program messages to the user's native language
   is requested.])
    else
@@ -301,9 +301,9 @@ return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_a
      fi
      dnl For backward compatibility. Some packages may be using this.
-      AC_DEFINE(HAVE_GETTEXT, 1,
+      AC_DEFINE([HAVE_GETTEXT], [1],
       [Define if the GNU gettext() function is already present or preinstalled.])
-      AC_DEFINE(HAVE_DCGETTEXT, 1,
+      AC_DEFINE([HAVE_DCGETTEXT], [1],
       [Define if the GNU dcgettext() function is already present or preinstalled.])
    fi
@@ -319,9 +319,9 @@ return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_a
    fi
    dnl Make all variables we use known to autoconf.
-    AC_SUBST(BUILD_INCLUDED_LIBINTL)
+    AC_SUBST([BUILD_INCLUDED_LIBINTL])
-    AC_SUBST(USE_INCLUDED_LIBINTL)
+    AC_SUBST([USE_INCLUDED_LIBINTL])
-    AC_SUBST(CATOBJEXT)
+    AC_SUBST([CATOBJEXT])
    dnl For backward compatibility. Some configure.ins may be using this.
    nls_cv_header_intl=
@@ -329,36 +329,36 @@ return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_a
    dnl For backward compatibility. Some Makefiles may be using this.
    DATADIRNAME=share
-    AC_SUBST(DATADIRNAME)
+    AC_SUBST([DATADIRNAME])
    dnl For backward compatibility. Some Makefiles may be using this.
    INSTOBJEXT=.mo
-    AC_SUBST(INSTOBJEXT)
+    AC_SUBST([INSTOBJEXT])
    dnl For backward compatibility. Some Makefiles may be using this.
    GENCAT=gencat
-    AC_SUBST(GENCAT)
+    AC_SUBST([GENCAT])
    dnl For backward compatibility. Some Makefiles may be using this.
    INTLOBJS=
    if test "$USE_INCLUDED_LIBINTL" = yes; then
      INTLOBJS="\$(GETTOBJS)"
    fi
-    AC_SUBST(INTLOBJS)
+    AC_SUBST([INTLOBJS])
    dnl Enable libtool support if the surrounding package wishes it.
    INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
-    AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
+    AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
  ])
  dnl For backward compatibility. Some Makefiles may be using this.
  INTLLIBS="$LIBINTL"
-  AC_SUBST(INTLLIBS)
+  AC_SUBST([INTLLIBS])
  dnl Make all documented variables known to autoconf.
-  AC_SUBST(LIBINTL)
+  AC_SUBST([LIBINTL])
-  AC_SUBST(LTLIBINTL)
+  AC_SUBST([LTLIBINTL])
-  AC_SUBST(POSUB)
+  AC_SUBST([POSUB])
 ])
diff --git a/gl/m4/glibc2.m4 b/gl/m4/glibc2.m4
index e8f5bfe6..fe58a0f3 100644
--- a/gl/m4/glibc2.m4
+++ b/gl/m4/glibc2.m4
@@ -1,5 +1,5 @@
-# glibc2.m4 serial 1
+# glibc2.m4 serial 2
-dnl Copyright (C) 2000-2002, 2004 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2004, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,8 +9,8 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gt_GLIBC2],
  [
-    AC_CACHE_CHECK(whether we are using the GNU C Library 2 or newer,
+    AC_CACHE_CHECK([whether we are using the GNU C Library 2 or newer],
-      ac_cv_gnu_library_2,
+      [ac_cv_gnu_library_2],
      [AC_EGREP_CPP([Lucky GNU user],
        [
 #include <features.h>
@@ -20,11 +20,11 @@ AC_DEFUN([gt_GLIBC2],
 #endif
 #endif
        ],
-        ac_cv_gnu_library_2=yes,
+        [ac_cv_gnu_library_2=yes],
-        ac_cv_gnu_library_2=no)
+        [ac_cv_gnu_library_2=no])
      ]
    )
-    AC_SUBST(GLIBC2)
+    AC_SUBST([GLIBC2])
    GLIBC2="$ac_cv_gnu_library_2"
  ]
 )
diff --git a/gl/m4/glibc21.m4 b/gl/m4/glibc21.m4
index d95fd986..93fbf474 100644
--- a/gl/m4/glibc21.m4
+++ b/gl/m4/glibc21.m4
@@ -1,5 +1,5 @@
-# glibc21.m4 serial 3
+# glibc21.m4 serial 4
-dnl Copyright (C) 2000-2002, 2004 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2004, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,8 +9,8 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_GLIBC21],
  [
-    AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
+    AC_CACHE_CHECK([whether we are using the GNU C Library 2.1 or newer],
-      ac_cv_gnu_library_2_1,
+      [ac_cv_gnu_library_2_1],
      [AC_EGREP_CPP([Lucky GNU user],
        [
 #include <features.h>
@@ -20,11 +20,11 @@ AC_DEFUN([gl_GLIBC21],
 #endif
 #endif
        ],
-        ac_cv_gnu_library_2_1=yes,
+        [ac_cv_gnu_library_2_1=yes],
-        ac_cv_gnu_library_2_1=no)
+        [ac_cv_gnu_library_2_1=no])
      ]
    )
-    AC_SUBST(GLIBC21)
+    AC_SUBST([GLIBC21])
    GLIBC21="$ac_cv_gnu_library_2_1"
  ]
 )
diff --git a/gl/m4/gnulib-cache.m4 b/gl/m4/gnulib-cache.m4
index 302dc191..eb471340 100644
--- a/gl/m4/gnulib-cache.m4
+++ b/gl/m4/gnulib-cache.m4
@@ -1,4 +1,4 @@
-# Copyright (C) 2004-2007 Free Software Foundation, Inc.
+# Copyright (C) 2002-2009 Free Software Foundation, Inc.
 #
 # This file is free software, distributed under the terms of the GNU
 # General Public License.  As a special exception to the GNU General
@@ -15,11 +15,25 @@
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --aux-dir=build-aux --no-libtool --macro-prefix=gl base64 dirname floorf fsusage getaddrinfo gethostname getloadavg getopt gettext mountlist regex vasprintf vsnprintf
+#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-libtool --macro-prefix=gl base64 dirname floorf fsusage getaddrinfo gethostname getloadavg getopt gettext mountlist regex vasprintf vsnprintf
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
-gl_MODULES([base64 dirname floorf fsusage getaddrinfo gethostname getloadavg getopt gettext mountlist regex vasprintf vsnprintf])
+gl_MODULES([
+  base64
+  dirname
+  floorf
+  fsusage
+  getaddrinfo
+  gethostname
+  getloadavg
+  getopt
+  gettext
+  mountlist
+  regex
+  vasprintf
+  vsnprintf
+])
 gl_AVOID([])
 gl_SOURCE_BASE([gl])
 gl_M4_BASE([gl/m4])
diff --git a/gl/m4/gnulib-common.m4 b/gl/m4/gnulib-common.m4
index 9336d726..5804eb9b 100644
--- a/gl/m4/gnulib-common.m4
+++ b/gl/m4/gnulib-common.m4
@@ -1,9 +1,38 @@
-# gnulib-common.m4 serial 3
+# gnulib-common.m4 serial 7
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
+# gl_COMMON
+# is expanded unconditionally through gnulib-tool magic.
+AC_DEFUN([gl_COMMON], [
+  dnl Use AC_REQUIRE here, so that the code is expanded once only.
+  AC_REQUIRE([gl_COMMON_BODY])
+])
+AC_DEFUN([gl_COMMON_BODY], [
+  AH_VERBATIM([isoc99_inline],
+[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
+   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
+   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
+   __APPLE__ && __MACH__ test for MacOS X.
+   __APPLE_CC__ tests for the Apple compiler and its version.
+   __STDC_VERSION__ tests for the C99 mode.  */
+#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
+# define __GNUC_STDC_INLINE__ 1
+#endif])
+  AH_VERBATIM([unused_parameter],
+[/* Define as a marker that can be attached to function parameter declarations
+   for parameters that are not used.  This helps to reduce warnings, such as
+   from GCC -Wunused-parameter.  */
+#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define _UNUSED_PARAMETER_ __attribute__ ((__unused__))
+#else
+# define _UNUSED_PARAMETER_
+#endif
+])
+])
 # gl_MODULE_INDICATOR([modulename])
 # defines a C macro indicating the presence of the given module.
 AC_DEFUN([gl_MODULE_INDICATOR],
@@ -12,6 +41,13 @@ AC_DEFUN([gl_MODULE_INDICATOR],
    [Define to 1 when using the gnulib module ]$1[.])
 ])
+# m4_foreach_w
+# is a backport of autoconf-2.59c's m4_foreach_w.
+# Remove this macro when we can assume autoconf >= 2.60.
+m4_ifndef([m4_foreach_w],
+  [m4_define([m4_foreach_w],
+    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
 # AC_PROG_MKDIR_P
 # is a backport of autoconf-2.60's AC_PROG_MKDIR_P.
 # Remove this macro when we can assume autoconf >= 2.60.
@@ -27,7 +63,7 @@ m4_ifdef([AC_PROG_MKDIR_P], [], [
 # works.
 # This definition can be removed once autoconf >= 2.62 can be assumed.
 AC_DEFUN([AC_C_RESTRICT],
-[AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict,
+[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
  [ac_cv_c_restrict=no
   # The order here caters to the fact that C++ does not require restrict.
   for ac_kw in __restrict __restrict__ _Restrict restrict; do
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index 85ad2e9d..99fa45dc 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -1,5 +1,5 @@
 # DO NOT EDIT! GENERATED AUTOMATICALLY!
-# Copyright (C) 2004-2007 Free Software Foundation, Inc.
+# Copyright (C) 2002-2009 Free Software Foundation, Inc.
 #
 # This file is free software, distributed under the terms of the GNU
 # General Public License.  As a special exception to the GNU General
@@ -40,20 +40,27 @@ AC_DEFUN([gl_INIT],
  m4_pushdef([AC_LIBOBJ], m4_defn([gl_LIBOBJ]))
  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gl_REPLACE_FUNCS]))
  m4_pushdef([AC_LIBSOURCES], m4_defn([gl_LIBSOURCES]))
+  m4_pushdef([gl_LIBSOURCES_LIST], [])
+  m4_pushdef([gl_LIBSOURCES_DIR], [])
+  gl_COMMON
  gl_source_base='gl'
  gl_FUNC_ALLOCA
  gl_HEADER_ARPA_INET
  AC_PROG_MKDIR_P
  gl_FUNC_BASE64
+  gl_FUNC_BTOWC
+  gl_WCHAR_MODULE_INDICATOR([btowc])
  gl_C_STRTOD
  gl_CLOEXEC
  gl_DIRNAME
  gl_DOUBLE_SLASH_ROOT
+  gl_HEADER_ERRNO_H
  gl_ERROR
  m4_ifdef([AM_XGETTEXT_OPTION],
    [AM_XGETTEXT_OPTION([--flag=error:3:c-format])
     AM_XGETTEXT_OPTION([--flag=error_at_line:5:c-format])])
  gl_EXITFAIL
+  gl_FCNTL_H
  gl_FCNTL_SAFER
  gl_MODULE_INDICATOR([fcntl-safer])
  gl_FLOAT_H
@@ -61,14 +68,19 @@ AC_DEFUN([gl_INIT],
  gl_MATH_MODULE_INDICATOR([floorf])
  gl_FSUSAGE
  gl_GETADDRINFO
+  gl_NETDB_MODULE_INDICATOR([getaddrinfo])
  gl_FUNC_GETHOSTNAME
+  gl_UNISTD_MODULE_INDICATOR([gethostname])
  gl_GETLOADAVG([$gl_source_base])
+  gl_STDLIB_MODULE_INDICATOR([getloadavg])
  gl_GETOPT
  dnl you must add AM_GNU_GETTEXT([external]) or similar to configure.ac.
  AM_GNU_GETTEXT_VERSION([0.17])
  AC_SUBST([LIBINTL])
  AC_SUBST([LTLIBINTL])
+  gl_HOSTENT
  gl_INET_NTOP
+  gl_ARPA_INET_MODULE_INDICATOR([inet_ntop])
  gl_INLINE
  gl_LOCALCHARSET
  LOCALCHARSET_TESTS_ENVIRONMENT="CHARSETALIASDIR=\"\$(top_builddir)/$gl_source_base\""
@@ -78,12 +90,22 @@ AC_DEFUN([gl_INIT],
  gl_FUNC_MALLOC_POSIX
  gl_STDLIB_MODULE_INDICATOR([malloc-posix])
  gl_MATH_H
+  gl_FUNC_MBRTOWC
+  gl_WCHAR_MODULE_INDICATOR([mbrtowc])
+  gl_FUNC_MBSINIT
+  gl_WCHAR_MODULE_INDICATOR([mbsinit])
  gl_MOUNTLIST
+  gl_MULTIARCH
+  gl_HEADER_NETDB
  gl_HEADER_NETINET_IN
  AC_PROG_MKDIR_P
+  gl_FUNC_OPEN
+  gl_MODULE_INDICATOR([open])
+  gl_FCNTL_MODULE_INDICATOR([open])
  gl_REGEX
  gl_SAFE_READ
  gl_SAFE_WRITE
+  gl_SERVENT
  gl_SIZE_MAX
  gl_FUNC_SNPRINTF
  gl_STDIO_MODULE_INDICATOR([snprintf])
@@ -93,8 +115,6 @@ AC_DEFUN([gl_INIT],
  gl_STDINT_H
  gl_STDIO_H
  gl_STDLIB_H
-  gl_FUNC_STRDUP
-  gl_STRING_MODULE_INDICATOR([strdup])
  gl_FUNC_STRERROR
  gl_STRING_MODULE_INDICATOR([strerror])
  gl_HEADER_STRING_H
@@ -103,6 +123,7 @@ AC_DEFUN([gl_INIT],
  gl_FUNC_STRNLEN
  gl_STRING_MODULE_INDICATOR([strnlen])
  gl_HEADER_SYS_SOCKET
+  gl_MODULE_INDICATOR([sys_socket])
  AC_PROG_MKDIR_P
  gl_UNISTD_H
  gl_UNISTD_SAFER
@@ -115,10 +136,27 @@ AC_DEFUN([gl_INIT],
  gl_FUNC_VSNPRINTF
  gl_STDIO_MODULE_INDICATOR([vsnprintf])
  gl_WCHAR_H
+  gl_FUNC_WCRTOMB
+  gl_WCHAR_MODULE_INDICATOR([wcrtomb])
  gl_WCTYPE_H
+  gl_FUNC_WRITE
+  gl_UNISTD_MODULE_INDICATOR([write])
  gl_XALLOC
  gl_XSIZE
  gl_XSTRNDUP
+  m4_ifval(gl_LIBSOURCES_LIST, [
+    m4_syscmd([test ! -d ]m4_defn([gl_LIBSOURCES_DIR])[ ||
+      for gl_file in ]gl_LIBSOURCES_LIST[ ; do
+        if test ! -r ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file ; then
+          echo "missing file ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file" >&2
+          exit 1
+        fi
+      done])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
+  ])
+  m4_popdef([gl_LIBSOURCES_DIR])
+  m4_popdef([gl_LIBSOURCES_LIST])
  m4_popdef([AC_LIBSOURCES])
  m4_popdef([AC_REPLACE_FUNCS])
  m4_popdef([AC_LIBOBJ])
@@ -141,7 +179,23 @@ AC_DEFUN([gl_INIT],
  m4_pushdef([AC_LIBOBJ], m4_defn([gltests_LIBOBJ]))
  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gltests_REPLACE_FUNCS]))
  m4_pushdef([AC_LIBSOURCES], m4_defn([gltests_LIBSOURCES]))
+  m4_pushdef([gltests_LIBSOURCES_LIST], [])
+  m4_pushdef([gltests_LIBSOURCES_DIR], [])
+  gl_COMMON
  gl_source_base='tests'
+  m4_ifval(gltests_LIBSOURCES_LIST, [
+    m4_syscmd([test ! -d ]m4_defn([gltests_LIBSOURCES_DIR])[ ||
+      for gl_file in ]gltests_LIBSOURCES_LIST[ ; do
+        if test ! -r ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file ; then
+          echo "missing file ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file" >&2
+          exit 1
+        fi
+      done])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
+  ])
+  m4_popdef([gltests_LIBSOURCES_DIR])
+  m4_popdef([gltests_LIBSOURCES_LIST])
  m4_popdef([AC_LIBSOURCES])
  m4_popdef([AC_REPLACE_FUNCS])
  m4_popdef([AC_LIBOBJ])
@@ -172,13 +226,6 @@ AC_DEFUN([gl_LIBOBJ], [
  gl_LIBOBJS="$gl_LIBOBJS $1.$ac_objext"
 ])
-# m4_foreach_w is provided by autoconf-2.59c and later.
-# This definition is to accommodate developers using versions
-# of autoconf older than that.
-m4_ifndef([m4_foreach_w],
-  [m4_define([m4_foreach_w],
-    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
 # Like AC_REPLACE_FUNCS, except that the module name goes
 # into gl_LIBOBJS instead of into LIBOBJS.
 AC_DEFUN([gl_REPLACE_FUNCS], [
@@ -187,15 +234,14 @@ AC_DEFUN([gl_REPLACE_FUNCS], [
 ])
 # Like AC_LIBSOURCES, except the directory where the source file is
-# expected is derived from the gnulib-tool parametrization,
+# expected is derived from the gnulib-tool parameterization,
 # and alloca is special cased (for the alloca-opt module).
 # We could also entirely rely on EXTRA_lib..._SOURCES.
 AC_DEFUN([gl_LIBSOURCES], [
  m4_foreach([_gl_NAME], [$1], [
    m4_if(_gl_NAME, [alloca.c], [], [
-      m4_syscmd([test -r gl/]_gl_NAME[ || test ! -d gl])dnl
+      m4_define([gl_LIBSOURCES_DIR], [gl])
-      m4_if(m4_sysval, [0], [],
+      m4_append([gl_LIBSOURCES_LIST], _gl_NAME, [ ])
-        [AC_FATAL([missing gl/]_gl_NAME)])
    ])
  ])
 ])
@@ -207,13 +253,6 @@ AC_DEFUN([gltests_LIBOBJ], [
  gltests_LIBOBJS="$gltests_LIBOBJS $1.$ac_objext"
 ])
-# m4_foreach_w is provided by autoconf-2.59c and later.
-# This definition is to accommodate developers using versions
-# of autoconf older than that.
-m4_ifndef([m4_foreach_w],
-  [m4_define([m4_foreach_w],
-    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
 # Like AC_REPLACE_FUNCS, except that the module name goes
 # into gltests_LIBOBJS instead of into LIBOBJS.
 AC_DEFUN([gltests_REPLACE_FUNCS], [
@@ -222,15 +261,14 @@ AC_DEFUN([gltests_REPLACE_FUNCS], [
 ])
 # Like AC_LIBSOURCES, except the directory where the source file is
-# expected is derived from the gnulib-tool parametrization,
+# expected is derived from the gnulib-tool parameterization,
 # and alloca is special cased (for the alloca-opt module).
 # We could also entirely rely on EXTRA_lib..._SOURCES.
 AC_DEFUN([gltests_LIBSOURCES], [
  m4_foreach([_gl_NAME], [$1], [
    m4_if(_gl_NAME, [alloca.c], [], [
-      m4_syscmd([test -r tests/]_gl_NAME[ || test ! -d tests])dnl
+      m4_define([gltests_LIBSOURCES_DIR], [tests])
-      m4_if(m4_sysval, [0], [],
+      m4_append([gltests_LIBSOURCES_LIST], _gl_NAME, [ ])
-        [AC_FATAL([missing tests/]_gl_NAME)])
    ])
  ])
 ])
@@ -242,11 +280,13 @@ AC_DEFUN([gl_FILE_LIST], [
  build-aux/link-warning.h
  lib/alloca.c
  lib/alloca.in.h
+  lib/arpa_inet.in.h
  lib/asnprintf.c
  lib/asprintf.c
  lib/base64.c
  lib/base64.h
  lib/basename.c
+  lib/btowc.c
  lib/c-strtod.c
  lib/c-strtod.h
  lib/cloexec.c
@@ -256,12 +296,14 @@ AC_DEFUN([gl_FILE_LIST], [
  lib/dirname.c
  lib/dirname.h
  lib/dup-safer.c
+  lib/errno.in.h
  lib/error.c
  lib/error.h
  lib/exitfail.c
  lib/exitfail.h
  lib/fcntl--.h
  lib/fcntl-safer.h
+  lib/fcntl.in.h
  lib/fd-safer.c
  lib/float+.h
  lib/float.in.h
@@ -275,7 +317,6 @@ AC_DEFUN([gl_FILE_LIST], [
  lib/full-write.h
  lib/gai_strerror.c
  lib/getaddrinfo.c
-  lib/getaddrinfo.h
  lib/gethostname.c
  lib/getloadavg.c
  lib/getopt.c
@@ -284,16 +325,19 @@ AC_DEFUN([gl_FILE_LIST], [
  lib/getopt_int.h
  lib/gettext.h
  lib/inet_ntop.c
-  lib/inet_ntop.h
  lib/intprops.h
  lib/localcharset.c
  lib/localcharset.h
  lib/malloc.c
  lib/math.in.h
+  lib/mbrtowc.c
+  lib/mbsinit.c
  lib/mountlist.c
  lib/mountlist.h
+  lib/netdb.in.h
  lib/netinet_in.in.h
  lib/open-safer.c
+  lib/open.c
  lib/pipe-safer.c
  lib/printf-args.c
  lib/printf-args.h
@@ -315,9 +359,10 @@ AC_DEFUN([gl_FILE_LIST], [
  lib/snprintf.c
  lib/stdbool.in.h
  lib/stdint.in.h
+  lib/stdio-write.c
  lib/stdio.in.h
  lib/stdlib.in.h
-  lib/strdup.c
+  lib/streq.h
  lib/strerror.c
  lib/string.in.h
  lib/stripslash.c
@@ -330,30 +375,34 @@ AC_DEFUN([gl_FILE_LIST], [
  lib/vasnprintf.c
  lib/vasnprintf.h
  lib/vasprintf.c
+  lib/verify.h
  lib/vsnprintf.c
  lib/wchar.in.h
+  lib/wcrtomb.c
  lib/wctype.in.h
+  lib/write.c
  lib/xalloc-die.c
  lib/xalloc.h
  lib/xmalloc.c
  lib/xsize.h
  lib/xstrndup.c
  lib/xstrndup.h
-  m4/absolute-header.m4
  m4/alloca.m4
  m4/arpa_inet_h.m4
  m4/base64.m4
+  m4/btowc.m4
  m4/c-strtod.m4
  m4/cloexec.m4
  m4/codeset.m4
  m4/dirname.m4
  m4/dos.m4
  m4/double-slash-root.m4
-  m4/eoverflow.m4
+  m4/errno_h.m4
  m4/error.m4
  m4/exitfail.m4
  m4/extensions.m4
  m4/fcntl-safer.m4
+  m4/fcntl_h.m4
  m4/float_h.m4
  m4/floorf.m4
  m4/fstypename.m4
@@ -366,6 +415,7 @@ AC_DEFUN([gl_FILE_LIST], [
  m4/glibc2.m4
  m4/glibc21.m4
  m4/gnulib-common.m4
+  m4/hostent.m4
  m4/iconv.m4
  m4/include_next.m4
  m4/inet_ntop.m4
@@ -383,21 +433,32 @@ AC_DEFUN([gl_FILE_LIST], [
  m4/lib-link.m4
  m4/lib-prefix.m4
  m4/localcharset.m4
+  m4/locale-fr.m4
+  m4/locale-ja.m4
+  m4/locale-zh.m4
  m4/lock.m4
  m4/longlong.m4
  m4/ls-mntd-fs.m4
  m4/malloc.m4
  m4/math_h.m4
+  m4/mbrtowc.m4
+  m4/mbsinit.m4
+  m4/mbstate_t.m4
  m4/mountlist.m4
+  m4/multiarch.m4
+  m4/netdb_h.m4
  m4/netinet_in_h.m4
  m4/nls.m4
-  m4/onceonly_2_57.m4
+  m4/onceonly.m4
+  m4/open.m4
  m4/po.m4
  m4/printf-posix.m4
+  m4/printf.m4
  m4/progtest.m4
  m4/regex.m4
  m4/safe-read.m4
  m4/safe-write.m4
+  m4/servent.m4
  m4/size_max.m4
  m4/snprintf.m4
  m4/socklen.m4
@@ -408,12 +469,12 @@ AC_DEFUN([gl_FILE_LIST], [
  m4/stdint_h.m4
  m4/stdio_h.m4
  m4/stdlib_h.m4
-  m4/strdup.m4
  m4/strerror.m4
  m4/string_h.m4
  m4/strndup.m4
  m4/strnlen.m4
  m4/sys_socket_h.m4
+  m4/threadlib.m4
  m4/uintmax_t.m4
  m4/unistd-safer.m4
  m4/unistd_h.m4
@@ -423,8 +484,10 @@ AC_DEFUN([gl_FILE_LIST], [
  m4/vsnprintf.m4
  m4/wchar.m4
  m4/wchar_t.m4
+  m4/wcrtomb.m4
  m4/wctype.m4
  m4/wint_t.m4
+  m4/write.m4
  m4/xalloc.m4
  m4/xsize.m4
  m4/xstrndup.m4
diff --git a/gl/m4/gnulib-tool.m4 b/gl/m4/gnulib-tool.m4
index ef593203..4438d488 100644
--- a/gl/m4/gnulib-tool.m4
+++ b/gl/m4/gnulib-tool.m4
@@ -1,4 +1,4 @@
-# gnulib-tool.m4 serial 1
+# gnulib-tool.m4 serial 2
 dnl Copyright (C) 2004-2005 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -8,6 +8,9 @@ dnl The following macros need not be invoked explicitly.
 dnl Invoking them does nothing except to declare default arguments
 dnl for "gnulib-tool --import".
+dnl Usage: gl_LOCAL_DIR([DIR])
+AC_DEFUN([gl_LOCAL_DIR], [])
 dnl Usage: gl_MODULES([module1 module2 ...])
 AC_DEFUN([gl_MODULES], [])
@@ -20,14 +23,35 @@ AC_DEFUN([gl_SOURCE_BASE], [])
 dnl Usage: gl_M4_BASE([DIR])
 AC_DEFUN([gl_M4_BASE], [])
+dnl Usage: gl_PO_BASE([DIR])
+AC_DEFUN([gl_PO_BASE], [])
+dnl Usage: gl_DOC_BASE([DIR])
+AC_DEFUN([gl_DOC_BASE], [])
+dnl Usage: gl_TESTS_BASE([DIR])
+AC_DEFUN([gl_TESTS_BASE], [])
+dnl Usage: gl_WITH_TESTS
+AC_DEFUN([gl_WITH_TESTS], [])
 dnl Usage: gl_LIB([LIBNAME])
 AC_DEFUN([gl_LIB], [])
-dnl Usage: gl_LGPL
+dnl Usage: gl_LGPL or gl_LGPL([VERSION])
 AC_DEFUN([gl_LGPL], [])
+dnl Usage: gl_MAKEFILE_NAME([FILENAME])
+AC_DEFUN([gl_MAKEFILE_NAME], [])
 dnl Usage: gl_LIBTOOL
 AC_DEFUN([gl_LIBTOOL], [])
 dnl Usage: gl_MACRO_PREFIX([PREFIX])
 AC_DEFUN([gl_MACRO_PREFIX], [])
+dnl Usage: gl_PO_DOMAIN([DOMAIN])
+AC_DEFUN([gl_PO_DOMAIN], [])
+dnl Usage: gl_VC_FILES([BOOLEAN])
+AC_DEFUN([gl_VC_FILES], [])
diff --git a/gl/m4/hostent.m4 b/gl/m4/hostent.m4
new file mode 100644
index 00000000..4a96af7a
--- /dev/null
+++ b/gl/m4/hostent.m4
@@ -0,0 +1,45 @@
+# hostent.m4 serial 1
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_HOSTENT],
+[
+  dnl Where are gethostent(), sethostent(), endhostent(), gethostbyname(),
+  dnl gethostbyaddr() defined?
+  dnl - On Solaris, they are in libnsl. Ignore libxnet.
+  dnl - On Haiku, they are in libnetwork.
+  dnl - On BeOS, they are in libnet.
+  dnl - On native Windows, they are in ws2_32.dll.
+  dnl - Otherwise they are in libc.
+  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
+  HOSTENT_LIB=
+  gl_saved_libs="$LIBS"
+  AC_SEARCH_LIBS([gethostbyname], [nsl network net],
+    [if test "$ac_cv_search_gethostbyname" != "none required"; then
+       HOSTENT_LIB="$ac_cv_search_gethostbyname"
+     fi])
+  LIBS="$gl_saved_libs"
+  if test -z "$HOSTENT_LIB"; then
+    AC_CHECK_FUNCS([gethostbyname], , [
+      AC_CACHE_CHECK([for gethostbyname in winsock2.h and -lws2_32],
+        [gl_cv_w32_gethostbyname],
+        [gl_cv_w32_gethostbyname=no
+         gl_save_LIBS="$LIBS"
+         LIBS="$LIBS -lws2_32"
+         AC_TRY_LINK([
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#include <stddef.h>
+], [gethostbyname(NULL);], [gl_cv_w32_gethostbyname=yes])
+         LIBS="$gl_save_LIBS"
+        ])
+      if test "$gl_cv_w32_gethostbyname" = "yes"; then
+        HOSTENT_LIB="-lws2_32"
+      fi
+    ])
+  fi
+  AC_SUBST([HOSTENT_LIB])
+])
diff --git a/gl/m4/iconv.m4 b/gl/m4/iconv.m4
index 66bc76f4..3cc62682 100644
--- a/gl/m4/iconv.m4
+++ b/gl/m4/iconv.m4
@@ -1,5 +1,5 @@
-# iconv.m4 serial AM6 (gettext-0.17)
+# iconv.m4 serial AM7 (gettext-0.18)
-dnl Copyright (C) 2000-2002, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -34,7 +34,7 @@ AC_DEFUN([AM_ICONV_LINK],
  am_save_CPPFLAGS="$CPPFLAGS"
  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
-  AC_CACHE_CHECK([for iconv], am_cv_func_iconv, [
+  AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
    am_cv_func_iconv="no, consider installing GNU libiconv"
    am_cv_lib_iconv=no
    AC_TRY_LINK([#include <stdlib.h>
@@ -42,7 +42,7 @@ AC_DEFUN([AM_ICONV_LINK],
      [iconv_t cd = iconv_open("","");
       iconv(cd,NULL,NULL,NULL,NULL);
       iconv_close(cd);],
-      am_cv_func_iconv=yes)
+      [am_cv_func_iconv=yes])
    if test "$am_cv_func_iconv" != yes; then
      am_save_LIBS="$LIBS"
      LIBS="$LIBS $LIBICONV"
@@ -51,13 +51,13 @@ AC_DEFUN([AM_ICONV_LINK],
        [iconv_t cd = iconv_open("","");
         iconv(cd,NULL,NULL,NULL,NULL);
         iconv_close(cd);],
-        am_cv_lib_iconv=yes
+        [am_cv_lib_iconv=yes]
-        am_cv_func_iconv=yes)
+        [am_cv_func_iconv=yes])
      LIBS="$am_save_LIBS"
    fi
  ])
  if test "$am_cv_func_iconv" = yes; then
-    AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
+    AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
      dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
      am_save_LIBS="$LIBS"
      if test $am_cv_lib_iconv = yes; then
@@ -134,7 +134,7 @@ int main ()
    am_func_iconv=no am_cv_lib_iconv=no
  fi
  if test "$am_func_iconv" = yes; then
-    AC_DEFINE(HAVE_ICONV, 1,
+    AC_DEFINE([HAVE_ICONV], [1],
      [Define if you have the iconv() function and it works.])
  fi
  if test "$am_cv_lib_iconv" = yes; then
@@ -147,8 +147,8 @@ int main ()
    LIBICONV=
    LTLIBICONV=
  fi
-  AC_SUBST(LIBICONV)
+  AC_SUBST([LIBICONV])
-  AC_SUBST(LTLIBICONV)
+  AC_SUBST([LTLIBICONV])
 ])
 AC_DEFUN([AM_ICONV],
@@ -156,7 +156,7 @@ AC_DEFUN([AM_ICONV],
  AM_ICONV_LINK
  if test "$am_cv_func_iconv" = yes; then
    AC_MSG_CHECKING([for iconv declaration])
-    AC_CACHE_VAL(am_cv_proto_iconv, [
+    AC_CACHE_VAL([am_cv_proto_iconv], [
      AC_TRY_COMPILE([
 #include <stdlib.h>
 #include <iconv.h>
@@ -169,12 +169,12 @@ size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, si
 #else
 size_t iconv();
 #endif
-], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
+], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
-    AC_MSG_RESULT([$]{ac_t:-
+    AC_MSG_RESULT([${ac_t:-
-         }[$]am_cv_proto_iconv)
+         }$am_cv_proto_iconv])
-    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
+    AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
      [Define as const if the declaration of iconv() needs const.])
  fi
 ])
diff --git a/gl/m4/include_next.m4 b/gl/m4/include_next.m4
index 7ce472bc..062753c5 100644
--- a/gl/m4/include_next.m4
+++ b/gl/m4/include_next.m4
@@ -1,19 +1,46 @@
-# include_next.m4 serial 4
+# include_next.m4 serial 10
-dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Paul Eggert and Derek Price.
+dnl Sets INCLUDE_NEXT and PRAGMA_SYSTEM_HEADER.
+dnl
+dnl INCLUDE_NEXT expands to 'include_next' if the compiler supports it, or to
+dnl 'include' otherwise.
+dnl
+dnl INCLUDE_NEXT_AS_FIRST_DIRECTIVE expands to 'include_next' if the compiler
+dnl supports it in the special case that it is the first include directive in
+dnl the given file, or to 'include' otherwise.
+dnl
+dnl PRAGMA_SYSTEM_HEADER can be used in files that contain #include_next,
+dnl so as to avoid GCC warnings when the gcc option -pedantic is used.
+dnl '#pragma GCC system_header' has the same effect as if the file was found
+dnl through the include search path specified with '-isystem' options (as
+dnl opposed to the search path specified with '-I' options). Namely, gcc
+dnl does not warn about some things, and on some systems (Solaris and Interix)
+dnl __STDC__ evaluates to 0 instead of to 1. The latter is an undesired side
+dnl effect; we are therefore careful to use 'defined __STDC__' or '1' instead
+dnl of plain '__STDC__'.
 AC_DEFUN([gl_INCLUDE_NEXT],
 [
  AC_LANG_PREPROC_REQUIRE()
  AC_CACHE_CHECK([whether the preprocessor supports include_next],
    [gl_cv_have_include_next],
-    [rm -rf conftestd1 conftestd2
+    [rm -rf conftestd1a conftestd1b conftestd2
-     mkdir conftestd1 conftestd2
+     mkdir conftestd1a conftestd1b conftestd2
-     cat <<EOF > conftestd1/conftest.h
+     dnl The include of <stdio.h> is because IBM C 9.0 on AIX 6.1 supports
+     dnl include_next when used as first preprocessor directive in a file,
+     dnl but not when preceded by another include directive. Additionally,
+     dnl with this same compiler, include_next is a no-op when used in a
+     dnl header file that was included by specifying its absolute file name.
+     dnl Despite these two bugs, include_next is used in the compiler's
+     dnl <math.h>. By virtue of the second bug, we need to use include_next
+     dnl as well in this case.
+     cat <<EOF > conftestd1a/conftest.h
 #define DEFINED_IN_CONFTESTD1
 #include_next <conftest.h>
 #ifdef DEFINED_IN_CONFTESTD2
@@ -22,32 +49,53 @@ int foo;
 #error "include_next doesn't work"
 #endif
 EOF
+     cat <<EOF > conftestd1b/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
     cat <<EOF > conftestd2/conftest.h
 #ifndef DEFINED_IN_CONFTESTD1
 #error "include_next test doesn't work"
 #endif
 #define DEFINED_IN_CONFTESTD2
 EOF
-     save_CPPFLAGS="$CPPFLAGS"
+     gl_save_CPPFLAGS="$CPPFLAGS"
-     CPPFLAGS="$CPPFLAGS -Iconftestd1 -Iconftestd2"
+     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
     AC_COMPILE_IFELSE([#include <conftest.h>],
       [gl_cv_have_include_next=yes],
-       [gl_cv_have_include_next=no])
+       [CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
-     CPPFLAGS="$save_CPPFLAGS"
+        AC_COMPILE_IFELSE([#include <conftest.h>],
-     rm -rf conftestd1 conftestd2
+          [gl_cv_have_include_next=buggy],
+          [gl_cv_have_include_next=no])
+       ])
+     CPPFLAGS="$gl_save_CPPFLAGS"
+     rm -rf conftestd1a conftestd1b conftestd2
    ])
+  PRAGMA_SYSTEM_HEADER=
  if test $gl_cv_have_include_next = yes; then
-    dnl FIXME: Remove HAVE_INCLUDE_NEXT and update everything that uses it
-    dnl to use @INCLUDE_NEXT@ instead.
-    AC_DEFINE([HAVE_INCLUDE_NEXT], 1,
-              [Define if your compiler supports the #include_next directive.])
    INCLUDE_NEXT=include_next
+    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    if test -n "$GCC"; then
+      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
+    fi
  else
-    INCLUDE_NEXT=include
+    if test $gl_cv_have_include_next = buggy; then
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    else
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
+    fi
  fi
  AC_SUBST([INCLUDE_NEXT])
+  AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE])
+  AC_SUBST([PRAGMA_SYSTEM_HEADER])
 ])
 # gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...)
@@ -63,12 +111,16 @@ EOF
 # The three "///" are to pacify Sun C 5.8, which otherwise would say
 # "warning: #include of /usr/include/... may be non-portable".
 # Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
+# Note: This macro assumes that the header file is not empty after
+# preprocessing, i.e. it does not only define preprocessor macros but also
+# provides some type/enum definitions or function/variable declarations.
 AC_DEFUN([gl_CHECK_NEXT_HEADERS],
 [
  AC_REQUIRE([gl_INCLUDE_NEXT])
+  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_CHECK_HEADERS_ONCE([$1])
-  AC_FOREACH([gl_HEADER_NAME], [$1],
+  m4_foreach_w([gl_HEADER_NAME], [$1],
    [AS_VAR_PUSHDEF([gl_next_header],
                    [gl_cv_next_]m4_quote(m4_defn([gl_HEADER_NAME])))
     if test $gl_cv_have_include_next = yes; then
@@ -84,11 +136,22 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS],
              [AC_LANG_SOURCE(
                 [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]]
               )])
-            dnl eval is necessary to expand ac_cpp.
+            dnl AIX "xlc -E" and "cc -E" omit #line directives for header files
+            dnl that contain only a #include of other header files and no
+            dnl non-comment tokens of their own. This leads to a failure to
+            dnl detect the absolute name of <dirent.h>, <signal.h>, <poll.h>
+            dnl and others. The workaround is to force preservation of comments
+            dnl through option -C. This ensures all necessary #line directives
+            dnl are present. GCC supports option -C as well.
+            case "$host_os" in
+              aix*) gl_absname_cpp="$ac_cpp -C" ;;
+              *)    gl_absname_cpp="$ac_cpp" ;;
+            esac
+            dnl eval is necessary to expand gl_absname_cpp.
            dnl Ultrix and Pyramid sh refuse to redirect output of eval,
            dnl so use subshell.
            AS_VAR_SET([gl_next_header],
-              ['"'`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
+              ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
               sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{
                 s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#
                 s#^/[^/]#//&#
diff --git a/gl/m4/inet_ntop.m4 b/gl/m4/inet_ntop.m4
index bb02d229..42bfc5e4 100644
--- a/gl/m4/inet_ntop.m4
+++ b/gl/m4/inet_ntop.m4
@@ -1,19 +1,26 @@
-# inet_ntop.m4 serial 3
+# inet_ntop.m4 serial 8
-dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_INET_NTOP],
 [
-  AC_REPLACE_FUNCS(inet_ntop)
+  dnl Persuade Solaris <arpa/inet.h> to declare inet_ntop.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  gl_REPLACE_ARPA_INET_H
+  AC_REPLACE_FUNCS([inet_ntop])
  gl_PREREQ_INET_NTOP
 ])
-# Prerequisites of lib/inet_ntop.h and lib/inet_ntop.c.
+# Prerequisites of lib/inet_ntop.c.
 AC_DEFUN([gl_PREREQ_INET_NTOP], [
-  AC_CHECK_HEADERS_ONCE([netinet/in.h arpa/inet.h])
  AC_CHECK_DECLS([inet_ntop],,,[#include <arpa/inet.h>])
+  if test $ac_cv_have_decl_inet_ntop = no; then
+    HAVE_DECL_INET_NTOP=0
+  fi
  AC_REQUIRE([gl_SOCKET_FAMILIES])
  AC_REQUIRE([AC_C_RESTRICT])
 ])
diff --git a/gl/m4/inline.m4 b/gl/m4/inline.m4
index a07076cd..cee51099 100644
--- a/gl/m4/inline.m4
+++ b/gl/m4/inline.m4
@@ -1,5 +1,5 @@
-# inline.m4 serial 3
+# inline.m4 serial 4
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -32,7 +32,7 @@ AC_DEFUN([gl_INLINE],
     fi
    ])
  if test $gl_cv_c_inline_effective = yes; then
-    AC_DEFINE([HAVE_INLINE], 1,
+    AC_DEFINE([HAVE_INLINE], [1],
      [Define to 1 if the compiler supports one of the keywords
       'inline', '__inline__', '__inline' and effectively inlines
       functions marked as such.])
diff --git a/gl/m4/intdiv0.m4 b/gl/m4/intdiv0.m4
index 8c8a6708..29e6e0aa 100644
--- a/gl/m4/intdiv0.m4
+++ b/gl/m4/intdiv0.m4
@@ -1,5 +1,5 @@
-# intdiv0.m4 serial 2 (gettext-0.17)
+# intdiv0.m4 serial 3 (gettext-0.18)
-dnl Copyright (C) 2002, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002, 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -61,7 +61,7 @@ int main ()
  nan = y / y;
  exit (1);
 }
-], gt_cv_int_divbyzero_sigfpe=yes, gt_cv_int_divbyzero_sigfpe=no,
+], [gt_cv_int_divbyzero_sigfpe=yes], [gt_cv_int_divbyzero_sigfpe=no],
          [
            # Guess based on the CPU.
 changequote(,)dnl
@@ -79,6 +79,6 @@ changequote([,])dnl
    *yes) value=1;;
    *) value=0;;
  esac
-  AC_DEFINE_UNQUOTED(INTDIV0_RAISES_SIGFPE, $value,
+  AC_DEFINE_UNQUOTED([INTDIV0_RAISES_SIGFPE], [$value],
    [Define if integer division by zero raises signal SIGFPE.])
 ])
diff --git a/gl/m4/intldir.m4 b/gl/m4/intldir.m4
index 7a28843f..0980e6f2 100644
--- a/gl/m4/intldir.m4
+++ b/gl/m4/intldir.m4
@@ -1,5 +1,5 @@
-# intldir.m4 serial 1 (gettext-0.16)
+# intldir.m4 serial 2 (gettext-0.18)
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,7 +13,7 @@ dnl by the GNU Library General Public License, and the rest of the GNU
 dnl gettext package package is covered by the GNU General Public License.
 dnl They are *not* in the public domain.
-AC_PREREQ(2.52)
+AC_PREREQ([2.52])
 dnl Tells the AM_GNU_GETTEXT macro to consider an intl/ directory.
 AC_DEFUN([AM_GNU_GETTEXT_INTL_SUBDIR], [])
diff --git a/gl/m4/intlmacosx.m4 b/gl/m4/intlmacosx.m4
index d3f0d904..c24837c4 100644
--- a/gl/m4/intlmacosx.m4
+++ b/gl/m4/intlmacosx.m4
@@ -1,5 +1,5 @@
-# intlmacosx.m4 serial 1 (gettext-0.17)
+# intlmacosx.m4 serial 3 (gettext-0.18)
-dnl Copyright (C) 2004-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2004-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -19,7 +19,7 @@ AC_DEFUN([gt_INTL_MACOSX],
 [
  dnl Check for API introduced in MacOS X 10.2.
  AC_CACHE_CHECK([for CFPreferencesCopyAppValue],
-    gt_cv_func_CFPreferencesCopyAppValue,
+    [gt_cv_func_CFPreferencesCopyAppValue],
    [gt_save_LIBS="$LIBS"
     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
     AC_TRY_LINK([#include <CoreFoundation/CFPreferences.h>],
@@ -28,11 +28,11 @@ AC_DEFUN([gt_INTL_MACOSX],
       [gt_cv_func_CFPreferencesCopyAppValue=no])
     LIBS="$gt_save_LIBS"])
  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
-    AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], 1,
+    AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], [1],
      [Define to 1 if you have the MacOS X function CFPreferencesCopyAppValue in the CoreFoundation framework.])
  fi
  dnl Check for API introduced in MacOS X 10.3.
-  AC_CACHE_CHECK([for CFLocaleCopyCurrent], gt_cv_func_CFLocaleCopyCurrent,
+  AC_CACHE_CHECK([for CFLocaleCopyCurrent], [gt_cv_func_CFLocaleCopyCurrent],
    [gt_save_LIBS="$LIBS"
     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
     AC_TRY_LINK([#include <CoreFoundation/CFLocale.h>], [CFLocaleCopyCurrent();],
@@ -40,7 +40,7 @@ AC_DEFUN([gt_INTL_MACOSX],
       [gt_cv_func_CFLocaleCopyCurrent=no])
     LIBS="$gt_save_LIBS"])
  if test $gt_cv_func_CFLocaleCopyCurrent = yes; then
-    AC_DEFINE([HAVE_CFLOCALECOPYCURRENT], 1,
+    AC_DEFINE([HAVE_CFLOCALECOPYCURRENT], [1],
      [Define to 1 if you have the MacOS X function CFLocaleCopyCurrent in the CoreFoundation framework.])
  fi
  INTL_MACOSX_LIBS=
diff --git a/gl/m4/intmax.m4 b/gl/m4/intmax.m4
index ce7a8a49..a3785e99 100644
--- a/gl/m4/intmax.m4
+++ b/gl/m4/intmax.m4
@@ -1,5 +1,5 @@
-# intmax.m4 serial 3 (gettext-0.16)
+# intmax.m4 serial 5 (gettext-0.18)
-dnl Copyright (C) 2002-2005 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2005, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -12,7 +12,7 @@ AC_DEFUN([gt_TYPE_INTMAX_T],
 [
  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
-  AC_CACHE_CHECK(for intmax_t, gt_cv_c_intmax_t,
+  AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
    [AC_TRY_COMPILE([
 #include <stddef.h>
 #include <stdlib.h>
@@ -24,10 +24,10 @@ AC_DEFUN([gt_TYPE_INTMAX_T],
 #endif
 ],     [intmax_t x = -1;
        return !x;],
-       gt_cv_c_intmax_t=yes,
+       [gt_cv_c_intmax_t=yes],
-       gt_cv_c_intmax_t=no)])
+       [gt_cv_c_intmax_t=no])])
  if test $gt_cv_c_intmax_t = yes; then
-    AC_DEFINE(HAVE_INTMAX_T, 1,
+    AC_DEFINE([HAVE_INTMAX_T], [1],
      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
  fi
 ])
diff --git a/gl/m4/intmax_t.m4 b/gl/m4/intmax_t.m4
index 50ae35d2..264cb571 100644
--- a/gl/m4/intmax_t.m4
+++ b/gl/m4/intmax_t.m4
@@ -1,12 +1,12 @@
-# intmax_t.m4 serial 6
+# intmax_t.m4 serial 7
-dnl Copyright (C) 1997-2004, 2006-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 1997-2004, 2006-2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Paul Eggert.
-AC_PREREQ(2.13)
+AC_PREREQ([2.13])
 # Define intmax_t to 'long' or 'long long'
 # if it is not already defined in <stdint.h> or <inttypes.h>.
@@ -22,10 +22,10 @@ AC_DEFUN([gl_AC_TYPE_INTMAX_T],
    test $ac_cv_type_long_long_int = yes \
      && ac_type='long long' \
      || ac_type='long'
-    AC_DEFINE_UNQUOTED(intmax_t, $ac_type,
+    AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
     [Define to long or long long if <inttypes.h> and <stdint.h> don't define.])
  else
-    AC_DEFINE(HAVE_INTMAX_T, 1,
+    AC_DEFINE([HAVE_INTMAX_T], [1],
      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
  fi
 ])
@@ -36,7 +36,7 @@ AC_DEFUN([gt_AC_TYPE_INTMAX_T],
 [
  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
-  AC_CACHE_CHECK(for intmax_t, gt_cv_c_intmax_t,
+  AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
    [AC_TRY_COMPILE([
 #include <stddef.h>
 #include <stdlib.h>
@@ -48,14 +48,14 @@ AC_DEFUN([gt_AC_TYPE_INTMAX_T],
 #endif
 ], [intmax_t x = -1; return !x;], gt_cv_c_intmax_t=yes, gt_cv_c_intmax_t=no)])
  if test $gt_cv_c_intmax_t = yes; then
-    AC_DEFINE(HAVE_INTMAX_T, 1,
+    AC_DEFINE([HAVE_INTMAX_T], [1],
      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
  else
    AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
    test $ac_cv_type_long_long_int = yes \
      && ac_type='long long' \
      || ac_type='long'
-    AC_DEFINE_UNQUOTED(intmax_t, $ac_type,
+    AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
     [Define to long or long long if <stdint.h> and <inttypes.h> don't define.])
  fi
 ])
diff --git a/gl/m4/inttypes-pri.m4 b/gl/m4/inttypes-pri.m4
index 7c7f8940..98fec7bc 100644
--- a/gl/m4/inttypes-pri.m4
+++ b/gl/m4/inttypes-pri.m4
@@ -1,12 +1,12 @@
-# inttypes-pri.m4 serial 4 (gettext-0.16)
+# inttypes-pri.m4 serial 6 (gettext-0.18)
-dnl Copyright (C) 1997-2002, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 1997-2002, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Bruno Haible.
-AC_PREREQ(2.52)
+AC_PREREQ([2.52])
 # Define PRI_MACROS_BROKEN if <inttypes.h> exists and defines the PRI*
 # macros to non-string values.  This is the case on AIX 4.3.3.
@@ -16,17 +16,17 @@ AC_DEFUN([gt_INTTYPES_PRI],
  AC_CHECK_HEADERS([inttypes.h])
  if test $ac_cv_header_inttypes_h = yes; then
    AC_CACHE_CHECK([whether the inttypes.h PRIxNN macros are broken],
-      gt_cv_inttypes_pri_broken,
+      [gt_cv_inttypes_pri_broken],
      [
        AC_TRY_COMPILE([#include <inttypes.h>
 #ifdef PRId32
 char *p = PRId32;
 #endif
-], [], gt_cv_inttypes_pri_broken=no, gt_cv_inttypes_pri_broken=yes)
+], [], [gt_cv_inttypes_pri_broken=no], [gt_cv_inttypes_pri_broken=yes])
      ])
  fi
  if test "$gt_cv_inttypes_pri_broken" = yes; then
-    AC_DEFINE_UNQUOTED(PRI_MACROS_BROKEN, 1,
+    AC_DEFINE_UNQUOTED([PRI_MACROS_BROKEN], [1],
      [Define if <inttypes.h> exists and defines unusable PRI* macros.])
    PRI_MACROS_BROKEN=1
  else
diff --git a/gl/m4/inttypes_h.m4 b/gl/m4/inttypes_h.m4
index edc8ecb2..f4ca1602 100644
--- a/gl/m4/inttypes_h.m4
+++ b/gl/m4/inttypes_h.m4
@@ -1,5 +1,5 @@
-# inttypes_h.m4 serial 7
+# inttypes_h.m4 serial 9
-dnl Copyright (C) 1997-2004, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 1997-2004, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,15 +11,15 @@ dnl From Paul Eggert.
 AC_DEFUN([gl_AC_HEADER_INTTYPES_H],
 [
-  AC_CACHE_CHECK([for inttypes.h], gl_cv_header_inttypes_h,
+  AC_CACHE_CHECK([for inttypes.h], [gl_cv_header_inttypes_h],
  [AC_TRY_COMPILE(
    [#include <sys/types.h>
 #include <inttypes.h>],
    [uintmax_t i = (uintmax_t) -1; return !i;],
-    gl_cv_header_inttypes_h=yes,
+    [gl_cv_header_inttypes_h=yes],
-    gl_cv_header_inttypes_h=no)])
+    [gl_cv_header_inttypes_h=no])])
  if test $gl_cv_header_inttypes_h = yes; then
-    AC_DEFINE_UNQUOTED(HAVE_INTTYPES_H_WITH_UINTMAX, 1,
+    AC_DEFINE_UNQUOTED([HAVE_INTTYPES_H_WITH_UINTMAX], [1],
      [Define if <inttypes.h> exists, doesn't clash with <sys/types.h>,
       and declares uintmax_t. ])
  fi
diff --git a/gl/m4/lcmessage.m4 b/gl/m4/lcmessage.m4
index 19aa77e4..fa8e4167 100644
--- a/gl/m4/lcmessage.m4
+++ b/gl/m4/lcmessage.m4
@@ -1,5 +1,5 @@
-# lcmessage.m4 serial 4 (gettext-0.14.2)
+# lcmessage.m4 serial 6 (gettext-0.18)
-dnl Copyright (C) 1995-2002, 2004-2005 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2002, 2004-2005, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -20,11 +20,11 @@ dnl   Ulrich Drepper <drepper@cygnus.com>, 1995.
 AC_DEFUN([gt_LC_MESSAGES],
 [
-  AC_CACHE_CHECK([for LC_MESSAGES], gt_cv_val_LC_MESSAGES,
+  AC_CACHE_CHECK([for LC_MESSAGES], [gt_cv_val_LC_MESSAGES],
    [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
-       gt_cv_val_LC_MESSAGES=yes, gt_cv_val_LC_MESSAGES=no)])
+       [gt_cv_val_LC_MESSAGES=yes], [gt_cv_val_LC_MESSAGES=no])])
  if test $gt_cv_val_LC_MESSAGES = yes; then
-    AC_DEFINE(HAVE_LC_MESSAGES, 1,
+    AC_DEFINE([HAVE_LC_MESSAGES], [1],
      [Define if your <locale.h> file defines LC_MESSAGES.])
  fi
 ])
diff --git a/gl/m4/lib-ld.m4 b/gl/m4/lib-ld.m4
index 96c4e2c3..e4863f2c 100644
--- a/gl/m4/lib-ld.m4
+++ b/gl/m4/lib-ld.m4
@@ -1,5 +1,5 @@
-# lib-ld.m4 serial 3 (gettext-0.13)
+# lib-ld.m4 serial 4 (gettext-0.18)
-dnl Copyright (C) 1996-2003 Free Software Foundation, Inc.
+dnl Copyright (C) 1996-2003, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -10,7 +10,7 @@ dnl with libtool.m4.
 dnl From libtool-1.4. Sets the variable with_gnu_ld to yes or no.
 AC_DEFUN([AC_LIB_PROG_LD_GNU],
-[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], acl_cv_prog_gnu_ld,
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld],
 [# I'd rather use --version here, but apparently some GNU ld's only accept -v.
 case `$LD -v 2>&1 </dev/null` in
 *GNU* | *'with BFD'*)
@@ -23,7 +23,7 @@ with_gnu_ld=$acl_cv_prog_gnu_ld
 dnl From libtool-1.4. Sets the variable LD.
 AC_DEFUN([AC_LIB_PROG_LD],
-[AC_ARG_WITH(gnu-ld,
+[AC_ARG_WITH([gnu-ld],
 [  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
 AC_REQUIRE([AC_PROG_CC])dnl
@@ -77,7 +77,7 @@ elif test "$with_gnu_ld" = yes; then
 else
  AC_MSG_CHECKING([for non-GNU ld])
 fi
-AC_CACHE_VAL(acl_cv_path_LD,
+AC_CACHE_VAL([acl_cv_path_LD],
 [if test -z "$LD"; then
  IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
  for ac_dir in $PATH; do
@@ -101,9 +101,9 @@ else
 fi])
 LD="$acl_cv_path_LD"
 if test -n "$LD"; then
-  AC_MSG_RESULT($LD)
+  AC_MSG_RESULT([$LD])
 else
-  AC_MSG_RESULT(no)
+  AC_MSG_RESULT([no])
 fi
 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
 AC_LIB_PROG_LD_GNU
diff --git a/gl/m4/lib-link.m4 b/gl/m4/lib-link.m4
index e3d26fc4..fcd3391b 100644
--- a/gl/m4/lib-link.m4
+++ b/gl/m4/lib-link.m4
@@ -1,12 +1,12 @@
-# lib-link.m4 serial 13 (gettext-0.17)
+# lib-link.m4 serial 18 (gettext-0.18)
-dnl Copyright (C) 2001-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2001-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Bruno Haible.
-AC_PREREQ(2.54)
+AC_PREREQ([2.54])
 dnl AC_LIB_LINKFLAGS(name [, dependencies]) searches for libname and
 dnl the libraries corresponding to explicit and implicit dependencies.
@@ -18,9 +18,9 @@ AC_DEFUN([AC_LIB_LINKFLAGS],
 [
  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  AC_REQUIRE([AC_LIB_RPATH])
-  define([Name],[translit([$1],[./-], [___])])
+  pushdef([Name],[translit([$1],[./-], [___])])
-  define([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
+  pushdef([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
-                               [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+                                [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
  AC_CACHE_CHECK([how to link with lib[]$1], [ac_cv_lib[]Name[]_libs], [
    AC_LIB_LINKFLAGS_BODY([$1], [$2])
    ac_cv_lib[]Name[]_libs="$LIB[]NAME"
@@ -39,8 +39,8 @@ AC_DEFUN([AC_LIB_LINKFLAGS],
  dnl Also set HAVE_LIB[]NAME so that AC_LIB_HAVE_LINKFLAGS can reuse the
  dnl results of this search when this library appears as a dependency.
  HAVE_LIB[]NAME=yes
-  undefine([Name])
+  popdef([NAME])
-  undefine([NAME])
+  popdef([Name])
 ])
 dnl AC_LIB_HAVE_LINKFLAGS(name, dependencies, includes, testcode)
@@ -57,9 +57,9 @@ AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
 [
  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  AC_REQUIRE([AC_LIB_RPATH])
-  define([Name],[translit([$1],[./-], [___])])
+  pushdef([Name],[translit([$1],[./-], [___])])
-  define([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
+  pushdef([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
-                               [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+                                [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
  dnl Search for lib[]Name and define LIB[]NAME, LTLIB[]NAME and INC[]NAME
  dnl accordingly.
@@ -95,8 +95,8 @@ AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
  AC_SUBST([LIB]NAME)
  AC_SUBST([LTLIB]NAME)
  AC_SUBST([LIB]NAME[_PREFIX])
-  undefine([Name])
+  popdef([NAME])
-  undefine([NAME])
+  popdef([Name])
 ])
 dnl Determine the platform dependent parameters needed to use rpath:
@@ -114,7 +114,7 @@ AC_DEFUN([AC_LIB_RPATH],
  AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD, $with_gnu_ld
  AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
  AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
-  AC_CACHE_CHECK([for shared library run path origin], acl_cv_rpath, [
+  AC_CACHE_CHECK([for shared library run path origin], [acl_cv_rpath], [
    CC="$CC" GCC="$GCC" LDFLAGS="$LDFLAGS" LD="$LD" with_gnu_ld="$with_gnu_ld" \
    ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.rpath" "$host" > conftest.sh
    . ./conftest.sh
@@ -131,11 +131,32 @@ AC_DEFUN([AC_LIB_RPATH],
  acl_hardcode_direct="$acl_cv_hardcode_direct"
  acl_hardcode_minus_L="$acl_cv_hardcode_minus_L"
  dnl Determine whether the user wants rpath handling at all.
-  AC_ARG_ENABLE(rpath,
+  AC_ARG_ENABLE([rpath],
    [  --disable-rpath         do not hardcode runtime library paths],
    :, enable_rpath=yes)
 ])
+dnl AC_LIB_FROMPACKAGE(name, package)
+dnl declares that libname comes from the given package. The configure file
+dnl will then not have a --with-libname-prefix option but a
+dnl --with-package-prefix option. Several libraries can come from the same
+dnl package. This declaration must occur before an AC_LIB_LINKFLAGS or similar
+dnl macro call that searches for libname.
+AC_DEFUN([AC_LIB_FROMPACKAGE],
+[
+  pushdef([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
+                                [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+  define([acl_frompackage_]NAME, [$2])
+  popdef([NAME])
+  pushdef([PACK],[$2])
+  pushdef([PACKUP],[translit(PACK,[abcdefghijklmnopqrstuvwxyz./-],
+                                  [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+  define([acl_libsinpackage_]PACKUP,
+    m4_ifdef([acl_libsinpackage_]PACKUP, [acl_libsinpackage_]PACKUP[[, ]],)[lib$1])
+  popdef([PACKUP])
+  popdef([PACK])
+])
 dnl AC_LIB_LINKFLAGS_BODY(name [, dependencies]) searches for libname and
 dnl the libraries corresponding to explicit and implicit dependencies.
 dnl Sets the LIB${NAME}, LTLIB${NAME} and INC${NAME} variables.
@@ -144,19 +165,23 @@ dnl in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
 AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
 [
  AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
-  define([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
+  pushdef([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
-                               [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+                                [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+  pushdef([PACK],[m4_ifdef([acl_frompackage_]NAME, [acl_frompackage_]NAME, lib[$1])])
+  pushdef([PACKUP],[translit(PACK,[abcdefghijklmnopqrstuvwxyz./-],
+                                  [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+  pushdef([PACKLIBS],[m4_ifdef([acl_frompackage_]NAME, [acl_libsinpackage_]PACKUP, lib[$1])])
  dnl Autoconf >= 2.61 supports dots in --with options.
-  define([N_A_M_E],[m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.61]),[-1],[translit([$1],[.],[_])],[$1])])
+  pushdef([P_A_C_K],[m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.61]),[-1],[translit(PACK,[.],[_])],PACK)])
  dnl By default, look in $includedir and $libdir.
  use_additional=yes
  AC_LIB_WITH_FINAL_PREFIX([
    eval additional_includedir=\"$includedir\"
    eval additional_libdir=\"$libdir\"
  ])
-  AC_LIB_ARG_WITH([lib]N_A_M_E[-prefix],
+  AC_ARG_WITH(P_A_C_K[-prefix],
-[  --with-lib]N_A_M_E[-prefix[=DIR]  search for lib$1 in DIR/include and DIR/lib
+[[  --with-]]P_A_C_K[[-prefix[=DIR]  search for ]PACKLIBS[ in DIR/include and DIR/lib
-  --without-lib]N_A_M_E[-prefix     don't search for lib$1 in includedir and libdir],
+  --without-]]P_A_C_K[[-prefix     don't search for ]PACKLIBS[ in includedir and libdir]],
 [
    if test "X$withval" = "Xno"; then
      use_additional=no
@@ -169,6 +194,10 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
      else
        additional_includedir="$withval/include"
        additional_libdir="$withval/$acl_libdirstem"
+        if test "$acl_libdirstem2" != "$acl_libdirstem" \
+           && ! test -d "$withval/$acl_libdirstem"; then
+          additional_libdir="$withval/$acl_libdirstem2"
+        fi
      fi
    fi
 ])
@@ -327,7 +356,9 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
              dnl Linking with a shared library. We attempt to hardcode its
              dnl directory into the executable's runpath, unless it's the
              dnl standard /usr/lib.
-              if test "$enable_rpath" = no || test "X$found_dir" = "X/usr/$acl_libdirstem"; then
+              if test "$enable_rpath" = no \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem2"; then
                dnl No hardcoding is needed.
                LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
              else
@@ -415,7 +446,16 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
            case "$found_dir" in
              */$acl_libdirstem | */$acl_libdirstem/)
                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
-                LIB[]NAME[]_PREFIX="$basedir"
+                if test "$name" = '$1'; then
+                  LIB[]NAME[]_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem2 | */$acl_libdirstem2/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
+                if test "$name" = '$1'; then
+                  LIB[]NAME[]_PREFIX="$basedir"
+                fi
                additional_includedir="$basedir/include"
                ;;
            esac
@@ -476,9 +516,11 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
                    dnl   3. if it's already present in $LDFLAGS or the already
                    dnl      constructed $LIBNAME,
                    dnl   4. if it doesn't exist as a directory.
-                    if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
+                    if test "X$additional_libdir" != "X/usr/$acl_libdirstem" \
+                       && test "X$additional_libdir" != "X/usr/$acl_libdirstem2"; then
                      haveit=
-                      if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
+                      if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem" \
+                         || test "X$additional_libdir" = "X/usr/local/$acl_libdirstem2"; then
                        if test -n "$GCC"; then
                          case $host_os in
                            linux* | gnu* | k*bsd*-gnu) haveit=yes;;
@@ -609,6 +651,11 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
      LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-R$found_dir"
    done
  fi
+  popdef([P_A_C_K])
+  popdef([PACKLIBS])
+  popdef([PACKUP])
+  popdef([PACK])
+  popdef([NAME])
 ])
 dnl AC_LIB_APPENDTOVAR(VAR, CONTENTS) appends the elements of CONTENTS to VAR,
@@ -654,7 +701,8 @@ AC_DEFUN([AC_LIB_LINKFLAGS_FROM_LIBS],
        if test -n "$next"; then
          dir="$next"
          dnl No need to hardcode the standard /usr/lib.
-          if test "X$dir" != "X/usr/$acl_libdirstem"; then
+          if test "X$dir" != "X/usr/$acl_libdirstem" \
+             && test "X$dir" != "X/usr/$acl_libdirstem2"; then
            rpathdirs="$rpathdirs $dir"
          fi
          next=
@@ -663,7 +711,8 @@ AC_DEFUN([AC_LIB_LINKFLAGS_FROM_LIBS],
            -L) next=yes ;;
            -L*) dir=`echo "X$opt" | sed -e 's,^X-L,,'`
                 dnl No need to hardcode the standard /usr/lib.
-                 if test "X$dir" != "X/usr/$acl_libdirstem"; then
+                 if test "X$dir" != "X/usr/$acl_libdirstem" \
+                    && test "X$dir" != "X/usr/$acl_libdirstem2"; then
                   rpathdirs="$rpathdirs $dir"
                 fi
                 next= ;;
diff --git a/gl/m4/lib-prefix.m4 b/gl/m4/lib-prefix.m4
index a8684e17..3bdc0fc5 100644
--- a/gl/m4/lib-prefix.m4
+++ b/gl/m4/lib-prefix.m4
@@ -1,5 +1,5 @@
-# lib-prefix.m4 serial 5 (gettext-0.15)
+# lib-prefix.m4 serial 6 (gettext-0.18)
-dnl Copyright (C) 2001-2005 Free Software Foundation, Inc.
+dnl Copyright (C) 2001-2005, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -153,33 +153,69 @@ AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
  prefix="$acl_save_prefix"
 ])
-dnl AC_LIB_PREPARE_MULTILIB creates a variable acl_libdirstem, containing
+dnl AC_LIB_PREPARE_MULTILIB creates
-dnl the basename of the libdir, either "lib" or "lib64".
+dnl - a variable acl_libdirstem, containing the basename of the libdir, either
+dnl   "lib" or "lib64" or "lib/64",
+dnl - a variable acl_libdirstem2, as a secondary possible value for
+dnl   acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
+dnl   "lib/amd64".
 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
 [
-  dnl There is no formal standard regarding lib and lib64. The current
+  dnl There is no formal standard regarding lib and lib64.
-  dnl practice is that on a system supporting 32-bit and 64-bit instruction
+  dnl On glibc systems, the current practice is that on a system supporting
-  dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit
+  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
-  dnl libraries go under $prefix/lib. We determine the compiler's default
+  dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
-  dnl mode by looking at the compiler's library search path. If at least
+  dnl the compiler's default mode by looking at the compiler's library search
-  dnl of its elements ends in /lib64 or points to a directory whose absolute
+  dnl path. If at least one of its elements ends in /lib64 or points to a
-  dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the
+  dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
-  dnl default, namely "lib".
+  dnl Otherwise we use the default, namely "lib".
+  dnl On Solaris systems, the current practice is that on a system supporting
+  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
+  dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
+  dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
+  AC_REQUIRE([AC_CANONICAL_HOST])
  acl_libdirstem=lib
-  searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
+  acl_libdirstem2=
-  if test -n "$searchpath"; then
+  case "$host_os" in
-    acl_save_IFS="${IFS=        }"; IFS=":"
+    solaris*)
-    for searchdir in $searchpath; do
+      dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
-      if test -d "$searchdir"; then
+      dnl <http://docs.sun.com/app/docs/doc/816-5138/dev-env?l=en&a=view>.
-        case "$searchdir" in
+      dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
-          */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
+      dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
-          *) searchdir=`cd "$searchdir" && pwd`
+      dnl symlink is missing, so we set acl_libdirstem2 too.
-             case "$searchdir" in
+      AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
-               */lib64 ) acl_libdirstem=lib64 ;;
+        [AC_EGREP_CPP([sixtyfour bits], [
-             esac ;;
+#ifdef _LP64
+sixtyfour bits
+#endif
+           ], [gl_cv_solaris_64bit=yes], [gl_cv_solaris_64bit=no])
+        ])
+      if test $gl_cv_solaris_64bit = yes; then
+        acl_libdirstem=lib/64
+        case "$host_cpu" in
+          sparc*)        acl_libdirstem2=lib/sparcv9 ;;
+          i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
        esac
      fi
-    done
+      ;;
-    IFS="$acl_save_IFS"
+    *)
-  fi
+      searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
+      if test -n "$searchpath"; then
+        acl_save_IFS="${IFS=    }"; IFS=":"
+        for searchdir in $searchpath; do
+          if test -d "$searchdir"; then
+            case "$searchdir" in
+              */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
+              *) searchdir=`cd "$searchdir" && pwd`
+                 case "$searchdir" in
+                   */lib64 ) acl_libdirstem=lib64 ;;
+                 esac ;;
+            esac
+          fi
+        done
+        IFS="$acl_save_IFS"
+      fi
+      ;;
+  esac
+  test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
 ])
diff --git a/gl/m4/localcharset.m4 b/gl/m4/localcharset.m4
index b2b77338..e9601041 100644
--- a/gl/m4/localcharset.m4
+++ b/gl/m4/localcharset.m4
@@ -1,5 +1,5 @@
-# localcharset.m4 serial 5
+# localcharset.m4 serial 6
-dnl Copyright (C) 2002, 2004, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2002, 2004, 2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,7 +8,7 @@ AC_DEFUN([gl_LOCALCHARSET],
 [
  dnl Prerequisites of lib/localcharset.c.
  AC_REQUIRE([AM_LANGINFO_CODESET])
-  AC_CHECK_DECLS_ONCE(getc_unlocked)
+  AC_CHECK_DECLS_ONCE([getc_unlocked])
  dnl Prerequisites of the lib/Makefile.am snippet.
  AC_REQUIRE([AC_CANONICAL_HOST])
diff --git a/gl/m4/locale-fr.m4 b/gl/m4/locale-fr.m4
new file mode 100644
index 00000000..e471839e
--- /dev/null
+++ b/gl/m4/locale-fr.m4
@@ -0,0 +1,204 @@
+# locale-fr.m4 serial 10
+dnl Copyright (C) 2003, 2005-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl From Bruno Haible.
+dnl Determine the name of a french locale with traditional encoding.
+AC_DEFUN([gt_LOCALE_FR],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a traditional french locale], [gt_cv_locale_fr], [
+    macosx=
+changequote(,)dnl
+    case "$host_os" in
+      darwin[56]*) ;;
+      darwin*) macosx=yes;;
+    esac
+changequote([,])dnl
+    if test -n "$macosx"; then
+      # On Darwin 7 (MacOS X), the libc supports some locales in non-UTF-8
+      # encodings, but the kernel does not support them. The documentation
+      # says:
+      #   "... all code that calls BSD system routines should ensure
+      #    that the const *char parameters of these routines are in UTF-8
+      #    encoding. All BSD system functions expect their string
+      #    parameters to be in UTF-8 encoding and nothing else."
+      # See the comments in config.charset. Therefore we bypass the test.
+      gt_cv_locale_fr=none
+    else
+      AC_LANG_CONFTEST([AC_LANG_SOURCE([
+changequote(,)dnl
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* Check whether the given locale name is recognized by the system.  */
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+  return 0;
+}
+changequote([,])dnl
+        ])])
+      if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+        # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+        # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
+        # configure script would override the LC_ALL setting. Likewise for
+        # LC_CTYPE, which is also set at the beginning of the configure script.
+        # Test for the usual locale name.
+        if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+          gt_cv_locale_fr=fr_FR
+        else
+          # Test for the locale name with explicit encoding suffix.
+          if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR.ISO-8859-1
+          else
+            # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+            if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO8859-1
+            else
+              # Test for the HP-UX locale name.
+              if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.iso88591
+              else
+                # Test for the Solaris 7 locale name.
+                if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr
+                else
+                  # None found.
+                  gt_cv_locale_fr=none
+                fi
+              fi
+            fi
+          fi
+        fi
+      fi
+      rm -fr conftest*
+    fi
+  ])
+  LOCALE_FR=$gt_cv_locale_fr
+  AC_SUBST([LOCALE_FR])
+])
+dnl Determine the name of a french locale with UTF-8 encoding.
+AC_DEFUN([gt_LOCALE_FR_UTF8],
+[
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a french Unicode locale], [gt_cv_locale_fr_utf8], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([
+changequote(,)dnl
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+  return 0;
+}
+changequote([,])dnl
+      ])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+      # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
+      # configure script would override the LC_ALL setting. Likewise for
+      # LC_CTYPE, which is also set at the beginning of the configure script.
+      # Test for the usual locale name.
+      if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+        gt_cv_locale_fr_utf8=fr_FR
+      else
+        # Test for the locale name with explicit encoding suffix.
+        if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+          gt_cv_locale_fr_utf8=fr_FR.UTF-8
+        else
+          # Test for the Solaris 7 locale name.
+          if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr.UTF-8
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+        fi
+      fi
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+  AC_SUBST([LOCALE_FR_UTF8])
+])
diff --git a/gl/m4/locale-ja.m4 b/gl/m4/locale-ja.m4
new file mode 100644
index 00000000..c80c5af9
--- /dev/null
+++ b/gl/m4/locale-ja.m4
@@ -0,0 +1,126 @@
+# locale-ja.m4 serial 6
+dnl Copyright (C) 2003, 2005-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl From Bruno Haible.
+dnl Determine the name of a japanese locale with EUC-JP encoding.
+AC_DEFUN([gt_LOCALE_JA],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a traditional japanese locale], [gt_cv_locale_ja], [
+    macosx=
+changequote(,)dnl
+    case "$host_os" in
+      darwin[56]*) ;;
+      darwin*) macosx=yes;;
+    esac
+changequote([,])dnl
+    if test -n "$macosx"; then
+      # On Darwin 7 (MacOS X), the libc supports some locales in non-UTF-8
+      # encodings, but the kernel does not support them. The documentation
+      # says:
+      #   "... all code that calls BSD system routines should ensure
+      #    that the const *char parameters of these routines are in UTF-8
+      #    encoding. All BSD system functions expect their string
+      #    parameters to be in UTF-8 encoding and nothing else."
+      # See the comments in config.charset. Therefore we bypass the test.
+      gt_cv_locale_ja=none
+    else
+      AC_LANG_CONFTEST([AC_LANG_SOURCE([
+changequote(,)dnl
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  const char *p;
+  /* Check whether the given locale name is recognized by the system.  */
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+  for (p = buf; *p != '\0'; p++)
+    if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+      return 1;
+  return 0;
+}
+changequote([,])dnl
+        ])])
+      if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+        # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+        # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
+        # configure script would override the LC_ALL setting. Likewise for
+        # LC_CTYPE, which is also set at the beginning of the configure script.
+        # Test for the AIX locale name.
+        if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+          gt_cv_locale_ja=ja_JP
+        else
+          # Test for the locale name with explicit encoding suffix.
+          if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP.EUC-JP
+          else
+            # Test for the HP-UX, OSF/1, NetBSD locale name.
+            if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.eucJP
+            else
+              # Test for the IRIX, FreeBSD locale name.
+              if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.EUC
+              else
+                # Test for the Solaris 7 locale name.
+                if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja
+                else
+                  # Special test for NetBSD 1.6.
+                  if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                    gt_cv_locale_ja=ja_JP.eucJP
+                  else
+                    # None found.
+                    gt_cv_locale_ja=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+        fi
+      fi
+      rm -fr conftest*
+    fi
+  ])
+  LOCALE_JA=$gt_cv_locale_ja
+  AC_SUBST([LOCALE_JA])
+])
diff --git a/gl/m4/locale-zh.m4 b/gl/m4/locale-zh.m4
new file mode 100644
index 00000000..ba7f9c5c
--- /dev/null
+++ b/gl/m4/locale-zh.m4
@@ -0,0 +1,111 @@
+# locale-zh.m4 serial 5
+dnl Copyright (C) 2003, 2005-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl From Bruno Haible.
+dnl Determine the name of a chinese locale with GB18030 encoding.
+AC_DEFUN([gt_LOCALE_ZH_CN],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a transitional chinese locale], [gt_cv_locale_zh_CN], [
+    macosx=
+changequote(,)dnl
+    case "$host_os" in
+      darwin[56]*) ;;
+      darwin*) macosx=yes;;
+    esac
+changequote([,])dnl
+    if test -n "$macosx"; then
+      # On Darwin 7 (MacOS X), the libc supports some locales in non-UTF-8
+      # encodings, but the kernel does not support them. The documentation
+      # says:
+      #   "... all code that calls BSD system routines should ensure
+      #    that the const *char parameters of these routines are in UTF-8
+      #    encoding. All BSD system functions expect their string
+      #    parameters to be in UTF-8 encoding and nothing else."
+      # See the comments in config.charset. Therefore we bypass the test.
+      gt_cv_locale_zh_CN=none
+    else
+      AC_LANG_CONFTEST([AC_LANG_SOURCE([
+changequote(,)dnl
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  const char *p;
+  /* Check whether the given locale name is recognized by the system.  */
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+  for (p = buf; *p != '\0'; p++)
+    if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+      return 1;
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+}
+changequote([,])dnl
+        ])])
+      if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+        # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+        # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
+        # configure script would override the LC_ALL setting. Likewise for
+        # LC_CTYPE, which is also set at the beginning of the configure script.
+        # Test for the locale name without encoding suffix.
+        if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+          gt_cv_locale_zh_CN=zh_CN
+        else
+          # Test for the locale name with explicit encoding suffix.
+          if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN.GB18030
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+        fi
+      else
+        # If there was a link error, due to mblen(), the system is so old that
+        # it certainly doesn't have a chinese locale.
+        gt_cv_locale_zh_CN=none
+      fi
+      rm -fr conftest*
+    fi
+  ])
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+  AC_SUBST([LOCALE_ZH_CN])
+])
diff --git a/gl/m4/lock.m4 b/gl/m4/lock.m4
index 91119335..b416e31a 100644
--- a/gl/m4/lock.m4
+++ b/gl/m4/lock.m4
@@ -1,259 +1,33 @@
-# lock.m4 serial 7 (gettext-0.17)
+# lock.m4 serial 10 (gettext-0.18)
-dnl Copyright (C) 2005-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2005-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Bruno Haible.
-dnl Tests for a multithreading library to be used.
+AC_DEFUN([gl_LOCK],
-dnl Defines at most one of the macros USE_POSIX_THREADS, USE_SOLARIS_THREADS,
-dnl USE_PTH_THREADS, USE_WIN32_THREADS
-dnl Sets the variables LIBTHREAD and LTLIBTHREAD to the linker options for use
-dnl in a Makefile (LIBTHREAD for use without libtool, LTLIBTHREAD for use with
-dnl libtool).
-dnl Sets the variables LIBMULTITHREAD and LTLIBMULTITHREAD similarly, for
-dnl programs that really need multithread functionality. The difference
-dnl between LIBTHREAD and LIBMULTITHREAD is that on platforms supporting weak
-dnl symbols, typically LIBTHREAD="" whereas LIBMULTITHREAD="-lpthread".
-dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
-dnl multithread-safe programs.
-AC_DEFUN([gl_LOCK_EARLY],
-[
-  AC_REQUIRE([gl_LOCK_EARLY_BODY])
-])
-dnl The guts of gl_LOCK_EARLY. Needs to be expanded only once.
-AC_DEFUN([gl_LOCK_EARLY_BODY],
-[
-  dnl Ordering constraints: This macro modifies CPPFLAGS in a way that
-  dnl influences the result of the autoconf tests that test for *_unlocked
-  dnl declarations, on AIX 5 at least. Therefore it must come early.
-  AC_BEFORE([$0], [gl_FUNC_GLIBC_UNLOCKED_IO])dnl
-  AC_BEFORE([$0], [gl_ARGP])dnl
-  AC_REQUIRE([AC_CANONICAL_HOST])
-  dnl _GNU_SOURCE is needed for pthread_rwlock_t on glibc systems.
-  dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
-  dnl AC_GNU_SOURCE.
-  m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
-    [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
-    [AC_REQUIRE([AC_GNU_SOURCE])])
-  dnl Check for multithreading.
-  AC_ARG_ENABLE(threads,
-AC_HELP_STRING([--enable-threads={posix|solaris|pth|win32}], [specify multithreading API])
-AC_HELP_STRING([--disable-threads], [build without multithread safety]),
-    [gl_use_threads=$enableval],
-    [case "$host_os" in
-       dnl Disable multithreading by default on OSF/1, because it interferes
-       dnl with fork()/exec(): When msgexec is linked with -lpthread, its child
-       dnl process gets an endless segmentation fault inside execvp().
-       osf*) gl_use_threads=no ;;
-       *)    gl_use_threads=yes ;;
-     esac
-    ])
-  if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
-    # For using <pthread.h>:
-    case "$host_os" in
-      osf*)
-        # On OSF/1, the compiler needs the flag -D_REENTRANT so that it
-        # groks <pthread.h>. cc also understands the flag -pthread, but
-        # we don't use it because 1. gcc-2.95 doesn't understand -pthread,
-        # 2. putting a flag into CPPFLAGS that has an effect on the linker
-        # causes the AC_TRY_LINK test below to succeed unexpectedly,
-        # leading to wrong values of LIBTHREAD and LTLIBTHREAD.
-        CPPFLAGS="$CPPFLAGS -D_REENTRANT"
-        ;;
-    esac
-    # Some systems optimize for single-threaded programs by default, and
-    # need special flags to disable these optimizations. For example, the
-    # definition of 'errno' in <errno.h>.
-    case "$host_os" in
-      aix* | freebsd*) CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE" ;;
-      solaris*) CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;;
-    esac
-  fi
-])
-dnl The guts of gl_LOCK. Needs to be expanded only once.
-AC_DEFUN([gl_LOCK_BODY],
 [
-  AC_REQUIRE([gl_LOCK_EARLY_BODY])
+  AC_REQUIRE([gl_THREADLIB])
-  gl_threads_api=none
+  if test "$gl_threads_api" = posix; then
-  LIBTHREAD=
+    # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the
-  LTLIBTHREAD=
+    # pthread_rwlock_* functions.
-  LIBMULTITHREAD=
+    AC_CHECK_TYPE([pthread_rwlock_t],
-  LTLIBMULTITHREAD=
+      [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
-  if test "$gl_use_threads" != no; then
+         [Define if the POSIX multithreading library has read/write locks.])],
-    dnl Check whether the compiler and linker support weak declarations.
+      [],
-    AC_MSG_CHECKING([whether imported symbols can be declared weak])
+      [#include <pthread.h>])
-    gl_have_weak=no
+    # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
-    AC_TRY_LINK([extern void xyzzy ();
+    AC_TRY_COMPILE([#include <pthread.h>],
-#pragma weak xyzzy], [xyzzy();], [gl_have_weak=yes])
+      [#if __FreeBSD__ == 4
-    AC_MSG_RESULT([$gl_have_weak])
-    if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
-      # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
-      # it groks <pthread.h>. It's added above, in gl_LOCK_EARLY_BODY.
-      AC_CHECK_HEADER(pthread.h, gl_have_pthread_h=yes, gl_have_pthread_h=no)
-      if test "$gl_have_pthread_h" = yes; then
-        # Other possible tests:
-        #   -lpthreads (FSU threads, PCthreads)
-        #   -lgthreads
-        gl_have_pthread=
-        # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
-        # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
-        # the second one only in libpthread, and lock.c needs it.
-        AC_TRY_LINK([#include <pthread.h>],
-          [pthread_mutex_lock((pthread_mutex_t*)0);
-           pthread_mutexattr_init((pthread_mutexattr_t*)0);],
-          [gl_have_pthread=yes])
-        # Test for libpthread by looking for pthread_kill. (Not pthread_self,
-        # since it is defined as a macro on OSF/1.)
-        if test -n "$gl_have_pthread"; then
-          # The program links fine without libpthread. But it may actually
-          # need to link with libpthread in order to create multiple threads.
-          AC_CHECK_LIB(pthread, pthread_kill,
-            [LIBMULTITHREAD=-lpthread LTLIBMULTITHREAD=-lpthread
-             # On Solaris and HP-UX, most pthread functions exist also in libc.
-             # Therefore pthread_in_use() needs to actually try to create a
-             # thread: pthread_create from libc will fail, whereas
-             # pthread_create will actually create a thread.
-             case "$host_os" in
-               solaris* | hpux*)
-                 AC_DEFINE([PTHREAD_IN_USE_DETECTION_HARD], 1,
-                   [Define if the pthread_in_use() detection is hard.])
-             esac
-            ])
-        else
-          # Some library is needed. Try libpthread and libc_r.
-          AC_CHECK_LIB(pthread, pthread_kill,
-            [gl_have_pthread=yes
-             LIBTHREAD=-lpthread LTLIBTHREAD=-lpthread
-             LIBMULTITHREAD=-lpthread LTLIBMULTITHREAD=-lpthread])
-          if test -z "$gl_have_pthread"; then
-            # For FreeBSD 4.
-            AC_CHECK_LIB(c_r, pthread_kill,
-              [gl_have_pthread=yes
-               LIBTHREAD=-lc_r LTLIBTHREAD=-lc_r
-               LIBMULTITHREAD=-lc_r LTLIBMULTITHREAD=-lc_r])
-          fi
-        fi
-        if test -n "$gl_have_pthread"; then
-          gl_threads_api=posix
-          AC_DEFINE([USE_POSIX_THREADS], 1,
-            [Define if the POSIX multithreading library can be used.])
-          if test -n "$LIBMULTITHREAD" || test -n "$LTLIBMULTITHREAD"; then
-            if test $gl_have_weak = yes; then
-              AC_DEFINE([USE_POSIX_THREADS_WEAK], 1,
-                [Define if references to the POSIX multithreading library should be made weak.])
-              LIBTHREAD=
-              LTLIBTHREAD=
-            fi
-          fi
-          # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the
-          # pthread_rwlock_* functions.
-          AC_CHECK_TYPE([pthread_rwlock_t],
-            [AC_DEFINE([HAVE_PTHREAD_RWLOCK], 1,
-               [Define if the POSIX multithreading library has read/write locks.])],
-            [],
-            [#include <pthread.h>])
-          # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
-          AC_TRY_COMPILE([#include <pthread.h>],
-            [#if __FreeBSD__ == 4
 error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
 #else
 int x = (int)PTHREAD_MUTEX_RECURSIVE;
 return !x;
 #endif],
-            [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], 1,
+      [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
-               [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
+         [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
-        fi
-      fi
-    fi
-    if test -z "$gl_have_pthread"; then
-      if test "$gl_use_threads" = yes || test "$gl_use_threads" = solaris; then
-        gl_have_solaristhread=
-        gl_save_LIBS="$LIBS"
-        LIBS="$LIBS -lthread"
-        AC_TRY_LINK([#include <thread.h>
-#include <synch.h>],
-          [thr_self();],
-          [gl_have_solaristhread=yes])
-        LIBS="$gl_save_LIBS"
-        if test -n "$gl_have_solaristhread"; then
-          gl_threads_api=solaris
-          LIBTHREAD=-lthread
-          LTLIBTHREAD=-lthread
-          LIBMULTITHREAD="$LIBTHREAD"
-          LTLIBMULTITHREAD="$LTLIBTHREAD"
-          AC_DEFINE([USE_SOLARIS_THREADS], 1,
-            [Define if the old Solaris multithreading library can be used.])
-          if test $gl_have_weak = yes; then
-            AC_DEFINE([USE_SOLARIS_THREADS_WEAK], 1,
-              [Define if references to the old Solaris multithreading library should be made weak.])
-            LIBTHREAD=
-            LTLIBTHREAD=
-          fi
-        fi
-      fi
-    fi
-    if test "$gl_use_threads" = pth; then
-      gl_save_CPPFLAGS="$CPPFLAGS"
-      AC_LIB_LINKFLAGS(pth)
-      gl_have_pth=
-      gl_save_LIBS="$LIBS"
-      LIBS="$LIBS -lpth"
-      AC_TRY_LINK([#include <pth.h>], [pth_self();], gl_have_pth=yes)
-      LIBS="$gl_save_LIBS"
-      if test -n "$gl_have_pth"; then
-        gl_threads_api=pth
-        LIBTHREAD="$LIBPTH"
-        LTLIBTHREAD="$LTLIBPTH"
-        LIBMULTITHREAD="$LIBTHREAD"
-        LTLIBMULTITHREAD="$LTLIBTHREAD"
-        AC_DEFINE([USE_PTH_THREADS], 1,
-          [Define if the GNU Pth multithreading library can be used.])
-        if test -n "$LIBMULTITHREAD" || test -n "$LTLIBMULTITHREAD"; then
-          if test $gl_have_weak = yes; then
-            AC_DEFINE([USE_PTH_THREADS_WEAK], 1,
-              [Define if references to the GNU Pth multithreading library should be made weak.])
-            LIBTHREAD=
-            LTLIBTHREAD=
-          fi
-        fi
-      else
-        CPPFLAGS="$gl_save_CPPFLAGS"
-      fi
-    fi
-    if test -z "$gl_have_pthread"; then
-      if test "$gl_use_threads" = yes || test "$gl_use_threads" = win32; then
-        if { case "$host_os" in
-               mingw*) true;;
-               *) false;;
-             esac
-           }; then
-          gl_threads_api=win32
-          AC_DEFINE([USE_WIN32_THREADS], 1,
-            [Define if the Win32 multithreading API can be used.])
-        fi
-      fi
-    fi
  fi
-  AC_MSG_CHECKING([for multithread API to use])
-  AC_MSG_RESULT([$gl_threads_api])
-  AC_SUBST(LIBTHREAD)
-  AC_SUBST(LTLIBTHREAD)
-  AC_SUBST(LIBMULTITHREAD)
-  AC_SUBST(LTLIBMULTITHREAD)
-])
-AC_DEFUN([gl_LOCK],
-[
-  AC_REQUIRE([gl_LOCK_EARLY])
-  AC_REQUIRE([gl_LOCK_BODY])
  gl_PREREQ_LOCK
 ])
@@ -261,56 +35,3 @@ AC_DEFUN([gl_LOCK],
 AC_DEFUN([gl_PREREQ_LOCK], [
  AC_REQUIRE([AC_C_INLINE])
 ])
-dnl Survey of platforms:
-dnl
-dnl Platform          Available   Compiler    Supports   test-lock
-dnl                   flavours    option      weak       result
-dnl ---------------   ---------   ---------   --------   ---------
-dnl Linux 2.4/glibc   posix       -lpthread       Y      OK
-dnl
-dnl GNU Hurd/glibc    posix
-dnl
-dnl FreeBSD 5.3       posix       -lc_r           Y
-dnl                   posix       -lkse ?         Y
-dnl                   posix       -lpthread ?     Y
-dnl                   posix       -lthr           Y
-dnl
-dnl FreeBSD 5.2       posix       -lc_r           Y
-dnl                   posix       -lkse           Y
-dnl                   posix       -lthr           Y
-dnl
-dnl FreeBSD 4.0,4.10  posix       -lc_r           Y      OK
-dnl
-dnl NetBSD 1.6        --
-dnl
-dnl OpenBSD 3.4       posix       -lpthread       Y      OK
-dnl
-dnl MacOS X 10.[123]  posix       -lpthread       Y      OK
-dnl
-dnl Solaris 7,8,9     posix       -lpthread       Y      Sol 7,8: 0.0; Sol 9: OK
-dnl                   solaris     -lthread        Y      Sol 7,8: 0.0; Sol 9: OK
-dnl
-dnl HP-UX 11          posix       -lpthread       N (cc) OK
-dnl                                               Y (gcc)
-dnl
-dnl IRIX 6.5          posix       -lpthread       Y      0.5
-dnl
-dnl AIX 4.3,5.1       posix       -lpthread       N      AIX 4: 0.5; AIX 5: OK
-dnl
-dnl OSF/1 4.0,5.1     posix       -pthread (cc)   N      OK
-dnl                               -lpthread (gcc) Y
-dnl
-dnl Cygwin            posix       -lpthread       Y      OK
-dnl
-dnl Any of the above  pth         -lpth                  0.0
-dnl
-dnl Mingw             win32                       N      OK
-dnl
-dnl BeOS 5            --
-dnl
-dnl The test-lock result shows what happens if in test-lock.c EXPLICIT_YIELD is
-dnl turned off:
-dnl   OK if all three tests terminate OK,
-dnl   0.5 if the first test terminates OK but the second one loops endlessly,
-dnl   0.0 if the first test already loops endlessly.
diff --git a/gl/m4/longlong.m4 b/gl/m4/longlong.m4
index 15bf9dac..eedc8d56 100644
--- a/gl/m4/longlong.m4
+++ b/gl/m4/longlong.m4
@@ -1,5 +1,5 @@
-# longlong.m4 serial 13
+# longlong.m4 serial 14
-dnl Copyright (C) 1999-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 1999-2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -46,7 +46,7 @@ AC_DEFUN([AC_TYPE_LONG_LONG_INT],
          [ac_cv_type_long_long_int=yes])],
       [ac_cv_type_long_long_int=no])])
  if test $ac_cv_type_long_long_int = yes; then
-    AC_DEFINE([HAVE_LONG_LONG_INT], 1,
+    AC_DEFINE([HAVE_LONG_LONG_INT], [1],
      [Define to 1 if the system has the type `long long int'.])
  fi
 ])
@@ -69,7 +69,7 @@ AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
       [ac_cv_type_unsigned_long_long_int=yes],
       [ac_cv_type_unsigned_long_long_int=no])])
  if test $ac_cv_type_unsigned_long_long_int = yes; then
-    AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1,
+    AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1],
      [Define to 1 if the system has the type `unsigned long long int'.])
  fi
 ])
diff --git a/gl/m4/ls-mntd-fs.m4 b/gl/m4/ls-mntd-fs.m4
index 21ac4e74..32ccb984 100644
--- a/gl/m4/ls-mntd-fs.m4
+++ b/gl/m4/ls-mntd-fs.m4
@@ -1,8 +1,7 @@
-#serial 26
+# serial 27
 # How to list mounted file systems.
-# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006 Free Software
+# Copyright (C) 1998-2004, 2006, 2009 Free Software Foundation, Inc.
-# Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -20,27 +19,27 @@ dnl
 AC_DEFUN([AC_FUNC_GETMNTENT],
 [# getmntent is in the standard C library on UNICOS, in -lsun on Irix 4,
 # -lseq on Dynix/PTX, -lgen on Unixware.
-AC_SEARCH_LIBS(getmntent, [sun seq gen])
+AC_SEARCH_LIBS([getmntent], [sun seq gen])
-AC_CHECK_FUNCS(getmntent)
+AC_CHECK_FUNCS([getmntent])
 ])
 # gl_LIST_MOUNTED_FILE_SYSTEMS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
 AC_DEFUN([gl_LIST_MOUNTED_FILE_SYSTEMS],
  [
-AC_CHECK_FUNCS(listmntent getmntinfo)
+AC_CHECK_FUNCS([listmntent getmntinfo])
-AC_CHECK_HEADERS_ONCE(sys/param.h sys/statvfs.h)
+AC_CHECK_HEADERS_ONCE([sys/param.h sys/statvfs.h])
 # We must include grp.h before ucred.h on OSF V4.0, since ucred.h uses
 # NGROUPS (as the array dimension for a struct member) without a definition.
-AC_CHECK_HEADERS(sys/ucred.h, [], [], [#include <grp.h>])
+AC_CHECK_HEADERS([sys/ucred.h], [], [], [#include <grp.h>])
-AC_CHECK_HEADERS(sys/mount.h, [], [],
+AC_CHECK_HEADERS([sys/mount.h], [], [],
  [AC_INCLUDES_DEFAULT
   [#if HAVE_SYS_PARAM_H
     #include <sys/param.h>
    #endif]])
-AC_CHECK_HEADERS(mntent.h sys/fs_types.h)
+AC_CHECK_HEADERS([mntent.h sys/fs_types.h])
    getfsstat_includes="\
 $ac_includes_default
 #if HAVE_SYS_PARAM_H
@@ -78,9 +77,9 @@ AC_FUNC_GETMNTENT
 if test -z "$ac_list_mounted_fs"; then
  # Cray UNICOS 9
  AC_MSG_CHECKING([for listmntent of Cray/Unicos-9])
-  AC_CACHE_VAL(fu_cv_sys_mounted_cray_listmntent,
+  AC_CACHE_VAL([fu_cv_sys_mounted_cray_listmntent],
    [fu_cv_sys_mounted_cray_listmntent=no
-      AC_EGREP_CPP(yes,
+      AC_EGREP_CPP([yes],
        [#ifdef _CRAY
 yes
 #endif
@@ -89,10 +88,10 @@ yes
      )
    ]
  )
-  AC_MSG_RESULT($fu_cv_sys_mounted_cray_listmntent)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_cray_listmntent])
  if test $fu_cv_sys_mounted_cray_listmntent = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_LISTMNTENT, 1,
+    AC_DEFINE([MOUNTED_LISTMNTENT], [1],
      [Define if there is a function named listmntent that can be used to
       list all mounted file systems.  (UNICOS)])
  fi
@@ -101,14 +100,14 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # AIX.
  AC_MSG_CHECKING([for mntctl function and struct vmount])
-  AC_CACHE_VAL(fu_cv_sys_mounted_vmount,
+  AC_CACHE_VAL([fu_cv_sys_mounted_vmount],
  [AC_TRY_CPP([#include <fshelp.h>],
    fu_cv_sys_mounted_vmount=yes,
    fu_cv_sys_mounted_vmount=no)])
-  AC_MSG_RESULT($fu_cv_sys_mounted_vmount)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_vmount])
  if test $fu_cv_sys_mounted_vmount = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_VMOUNT, 1,
+    AC_DEFINE([MOUNTED_VMOUNT], [1],
        [Define if there is a function named mntctl that can be used to read
         the list of mounted file systems, and there is a system header file
         that declares `struct vmount.'  (AIX)])
@@ -123,7 +122,7 @@ if test $ac_cv_func_getmntent = yes; then
  if test -z "$ac_list_mounted_fs"; then
    # 4.3BSD, SunOS, HP-UX, Dynix, Irix
    AC_MSG_CHECKING([for one-argument getmntent function])
-    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent1,
+    AC_CACHE_VAL([fu_cv_sys_mounted_getmntent1],
                 [AC_TRY_COMPILE([
 /* SunOS 4.1.x /usr/include/mntent.h needs this for FILE */
 #include <stdio.h>
@@ -145,10 +144,10 @@ if test $ac_cv_func_getmntent = yes; then
                      if (sizeof mnt && sizeof table) return 0;],
                    fu_cv_sys_mounted_getmntent1=yes,
                    fu_cv_sys_mounted_getmntent1=no)])
-    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent1)
+    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent1])
    if test $fu_cv_sys_mounted_getmntent1 = yes; then
      ac_list_mounted_fs=found
-      AC_DEFINE(MOUNTED_GETMNTENT1, 1,
+      AC_DEFINE([MOUNTED_GETMNTENT1], [1],
        [Define if there is a function named getmntent for reading the list
         of mounted file systems, and that function takes a single argument.
         (4.3BSD, SunOS, HP-UX, Dynix, Irix)])
@@ -158,17 +157,17 @@ if test $ac_cv_func_getmntent = yes; then
  if test -z "$ac_list_mounted_fs"; then
    # SVR4
    AC_MSG_CHECKING([for two-argument getmntent function])
-    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent2,
+    AC_CACHE_VAL([fu_cv_sys_mounted_getmntent2],
-    [AC_EGREP_HEADER(getmntent, sys/mnttab.h,
+    [AC_EGREP_HEADER([getmntent], [sys/mnttab.h],
      fu_cv_sys_mounted_getmntent2=yes,
      fu_cv_sys_mounted_getmntent2=no)])
-    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent2)
+    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent2])
    if test $fu_cv_sys_mounted_getmntent2 = yes; then
      ac_list_mounted_fs=found
-      AC_DEFINE(MOUNTED_GETMNTENT2, 1,
+      AC_DEFINE([MOUNTED_GETMNTENT2], [1],
        [Define if there is a function named getmntent for reading the list of
         mounted file systems, and that function takes two arguments.  (SVR4)])
-      AC_CHECK_FUNCS(hasmntopt)
+      AC_CHECK_FUNCS([hasmntopt])
    fi
  fi
@@ -179,7 +178,7 @@ if test -z "$ac_list_mounted_fs"; then
  # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
  AC_MSG_CHECKING([for getfsstat function])
-  AC_CACHE_VAL(fu_cv_sys_mounted_getfsstat,
+  AC_CACHE_VAL([fu_cv_sys_mounted_getfsstat],
  [AC_TRY_LINK([
 #include <sys/types.h>
 #if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
@@ -194,10 +193,10 @@ if test -z "$ac_list_mounted_fs"; then
   char *t = FS_TYPE (*stats); ],
    fu_cv_sys_mounted_getfsstat=yes,
    fu_cv_sys_mounted_getfsstat=no)])
-  AC_MSG_RESULT($fu_cv_sys_mounted_getfsstat)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_getfsstat])
  if test $fu_cv_sys_mounted_getfsstat = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_GETFSSTAT, 1,
+    AC_DEFINE([MOUNTED_GETFSSTAT], [1],
              [Define if there is a function named getfsstat for reading the
               list of mounted file systems.  (DEC Alpha running OSF/1)])
  fi
@@ -206,17 +205,17 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # SVR3
  AC_MSG_CHECKING([for FIXME existence of three headers])
-  AC_CACHE_VAL(fu_cv_sys_mounted_fread_fstyp,
+  AC_CACHE_VAL([fu_cv_sys_mounted_fread_fstyp],
    [AC_TRY_CPP([
 #include <sys/statfs.h>
 #include <sys/fstyp.h>
 #include <mnttab.h>],
                fu_cv_sys_mounted_fread_fstyp=yes,
                fu_cv_sys_mounted_fread_fstyp=no)])
-  AC_MSG_RESULT($fu_cv_sys_mounted_fread_fstyp)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_fread_fstyp])
  if test $fu_cv_sys_mounted_fread_fstyp = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_FREAD_FSTYP, 1,
+    AC_DEFINE([MOUNTED_FREAD_FSTYP], [1],
      [Define if (like SVR2) there is no specific function for reading the
       list of mounted file systems, and your system has these header files:
       <sys/fstyp.h> and <sys/statfs.h>.  (SVR3)])
@@ -226,16 +225,16 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # 4.4BSD and DEC OSF/1.
  AC_MSG_CHECKING([for getmntinfo function])
-  AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo,
+  AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo],
    [
      test "$ac_cv_func_getmntinfo" = yes \
          && fu_cv_sys_mounted_getmntinfo=yes \
          || fu_cv_sys_mounted_getmntinfo=no
    ])
-  AC_MSG_RESULT($fu_cv_sys_mounted_getmntinfo)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo])
  if test $fu_cv_sys_mounted_getmntinfo = yes; then
    AC_MSG_CHECKING([whether getmntinfo returns statvfs structures])
-    AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo2,
+    AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo2],
      [
        AC_TRY_COMPILE([
 #if HAVE_SYS_PARAM_H
@@ -256,13 +255,13 @@ extern int getmntinfo (struct statfs **, int);
    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo2])
    if test $fu_cv_sys_mounted_getmntinfo2 = no; then
      ac_list_mounted_fs=found
-      AC_DEFINE(MOUNTED_GETMNTINFO, 1,
+      AC_DEFINE([MOUNTED_GETMNTINFO], [1],
                [Define if there is a function named getmntinfo for reading the
                 list of mounted file systems and it returns an array of
                 'struct statfs'.  (4.4BSD, Darwin)])
    else
      ac_list_mounted_fs=found
-      AC_DEFINE(MOUNTED_GETMNTINFO2, 1,
+      AC_DEFINE([MOUNTED_GETMNTINFO2], [1],
                [Define if there is a function named getmntinfo for reading the
                 list of mounted file systems and it returns an array of
                 'struct statvfs'.  (NetBSD 3.0)])
@@ -273,16 +272,16 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # Ultrix
  AC_MSG_CHECKING([for getmnt function])
-  AC_CACHE_VAL(fu_cv_sys_mounted_getmnt,
+  AC_CACHE_VAL([fu_cv_sys_mounted_getmnt],
    [AC_TRY_CPP([
 #include <sys/fs_types.h>
 #include <sys/mount.h>],
                fu_cv_sys_mounted_getmnt=yes,
                fu_cv_sys_mounted_getmnt=no)])
-  AC_MSG_RESULT($fu_cv_sys_mounted_getmnt)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_getmnt])
  if test $fu_cv_sys_mounted_getmnt = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_GETMNT, 1,
+    AC_DEFINE([MOUNTED_GETMNT], [1],
      [Define if there is a function named getmnt for reading the list of
       mounted file systems.  (Ultrix)])
  fi
@@ -290,8 +289,8 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # BeOS
-  AC_CHECK_FUNCS(next_dev fs_stat_dev)
+  AC_CHECK_FUNCS([next_dev fs_stat_dev])
-  AC_CHECK_HEADERS(fs_info.h)
+  AC_CHECK_HEADERS([fs_info.h])
  AC_MSG_CHECKING([for BEOS mounted file system support functions])
  if test $ac_cv_header_fs_info_h = yes \
      && test $ac_cv_func_next_dev = yes \
@@ -300,10 +299,10 @@ if test -z "$ac_list_mounted_fs"; then
  else
    fu_result=no
  fi
-  AC_MSG_RESULT($fu_result)
+  AC_MSG_RESULT([$fu_result])
  if test $fu_result = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_FS_STAT_DEV, 1,
+    AC_DEFINE([MOUNTED_FS_STAT_DEV], [1],
      [Define if there are functions named next_dev and fs_stat_dev for
       reading the list of mounted file systems.  (BeOS)])
  fi
@@ -312,14 +311,14 @@ fi
 if test -z "$ac_list_mounted_fs"; then
  # SVR2
  AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
-  AC_CACHE_VAL(fu_cv_sys_mounted_fread,
+  AC_CACHE_VAL([fu_cv_sys_mounted_fread],
    [AC_TRY_CPP([#include <mnttab.h>],
                fu_cv_sys_mounted_fread=yes,
                fu_cv_sys_mounted_fread=no)])
-  AC_MSG_RESULT($fu_cv_sys_mounted_fread)
+  AC_MSG_RESULT([$fu_cv_sys_mounted_fread])
  if test $fu_cv_sys_mounted_fread = yes; then
    ac_list_mounted_fs=found
-    AC_DEFINE(MOUNTED_FREAD, 1,
+    AC_DEFINE([MOUNTED_FREAD], [1],
              [Define if there is no specific function for reading the list of
               mounted file systems.  fread will be used to read /etc/mnttab.
               (SVR2) ])
diff --git a/gl/m4/malloc.m4 b/gl/m4/malloc.m4
index 764f2a9f..80701716 100644
--- a/gl/m4/malloc.m4
+++ b/gl/m4/malloc.m4
@@ -1,5 +1,5 @@
-# malloc.m4 serial 8
+# malloc.m4 serial 9
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,7 +13,7 @@ AC_DEFUN([gl_FUNC_MALLOC_POSIX],
  AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
  if test $gl_cv_func_malloc_posix = yes; then
    HAVE_MALLOC_POSIX=1
-    AC_DEFINE([HAVE_MALLOC_POSIX], 1,
+    AC_DEFINE([HAVE_MALLOC_POSIX], [1],
      [Define if the 'malloc' function is POSIX compliant.])
  else
    AC_LIBOBJ([malloc])
diff --git a/gl/m4/math_h.m4 b/gl/m4/math_h.m4
index dd99e7f2..d941bc33 100644
--- a/gl/m4/math_h.m4
+++ b/gl/m4/math_h.m4
@@ -1,4 +1,4 @@
-# math_h.m4 serial 9
+# math_h.m4 serial 14
 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -8,6 +8,31 @@ AC_DEFUN([gl_MATH_H],
 [
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  gl_CHECK_NEXT_HEADERS([math.h])
+  AC_CACHE_CHECK([whether NAN macro works], [gl_cv_header_math_nan_works],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
+      [[/* Solaris 10 has a broken definition of NAN.  Other platforms
+        fail to provide NAN, or provide it only in C99 mode; this
+        test only needs to fail when NAN is provided but wrong.  */
+         float f = 1.0f;
+#ifdef NAN
+         f = NAN;
+#endif
+         return f == 0;]])],
+      [gl_cv_header_math_nan_works=yes],
+      [gl_cv_header_math_nan_works=no])])
+  if test $gl_cv_header_math_nan_works = no; then
+    REPLACE_NAN=1
+  fi
+  AC_CACHE_CHECK([whether HUGE_VAL works], [gl_cv_header_math_huge_val_works],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
+      [[/* Solaris 10 has a broken definition of HUGE_VAL.  */
+         double d = HUGE_VAL;
+         return d == 0;]])],
+      [gl_cv_header_math_huge_val_works=yes],
+      [gl_cv_header_math_huge_val_works=no])])
+  if test $gl_cv_header_math_huge_val_works = no; then
+    REPLACE_HUGE_VAL=1
+  fi
 ])
 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
@@ -26,6 +51,11 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
  GNULIB_FREXP=0;    AC_SUBST([GNULIB_FREXP])
  GNULIB_FREXPL=0;   AC_SUBST([GNULIB_FREXPL])
  GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
+  GNULIB_ISINF=0;    AC_SUBST([GNULIB_ISINF])
+  GNULIB_ISNAN=0;    AC_SUBST([GNULIB_ISNAN])
+  GNULIB_ISNANF=0;   AC_SUBST([GNULIB_ISNANF])
+  GNULIB_ISNAND=0;   AC_SUBST([GNULIB_ISNAND])
+  GNULIB_ISNANL=0;   AC_SUBST([GNULIB_ISNANL])
  GNULIB_LDEXPL=0;   AC_SUBST([GNULIB_LDEXPL])
  GNULIB_MATHL=0;    AC_SUBST([GNULIB_MATHL])
  GNULIB_ROUND=0;    AC_SUBST([GNULIB_ROUND])
@@ -36,6 +66,9 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
  GNULIB_TRUNCF=0;   AC_SUBST([GNULIB_TRUNCF])
  GNULIB_TRUNCL=0;   AC_SUBST([GNULIB_TRUNCL])
  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_ISNANF=1;               AC_SUBST([HAVE_ISNANF])
+  HAVE_ISNAND=1;               AC_SUBST([HAVE_ISNAND])
+  HAVE_ISNANL=1;               AC_SUBST([HAVE_ISNANL])
  HAVE_DECL_ACOSL=1;           AC_SUBST([HAVE_DECL_ACOSL])
  HAVE_DECL_ASINL=1;           AC_SUBST([HAVE_DECL_ASINL])
  HAVE_DECL_ATANL=1;           AC_SUBST([HAVE_DECL_ATANL])
@@ -49,18 +82,22 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
  HAVE_DECL_TANL=1;            AC_SUBST([HAVE_DECL_TANL])
  HAVE_DECL_TRUNC=1;           AC_SUBST([HAVE_DECL_TRUNC])
  HAVE_DECL_TRUNCF=1;          AC_SUBST([HAVE_DECL_TRUNCF])
-  HAVE_DECL_TRUNCL=1;          AC_SUBST([HAVE_DECL_TRUNCL])
  REPLACE_CEILF=0;             AC_SUBST([REPLACE_CEILF])
  REPLACE_CEILL=0;             AC_SUBST([REPLACE_CEILL])
  REPLACE_FLOORF=0;            AC_SUBST([REPLACE_FLOORF])
  REPLACE_FLOORL=0;            AC_SUBST([REPLACE_FLOORL])
  REPLACE_FREXP=0;             AC_SUBST([REPLACE_FREXP])
  REPLACE_FREXPL=0;            AC_SUBST([REPLACE_FREXPL])
+  REPLACE_HUGE_VAL=0;          AC_SUBST([REPLACE_HUGE_VAL])
  REPLACE_ISFINITE=0;          AC_SUBST([REPLACE_ISFINITE])
+  REPLACE_ISINF=0;             AC_SUBST([REPLACE_ISINF])
+  REPLACE_ISNAN=0;             AC_SUBST([REPLACE_ISNAN])
  REPLACE_LDEXPL=0;            AC_SUBST([REPLACE_LDEXPL])
+  REPLACE_NAN=0;               AC_SUBST([REPLACE_NAN])
  REPLACE_ROUND=0;             AC_SUBST([REPLACE_ROUND])
  REPLACE_ROUNDF=0;            AC_SUBST([REPLACE_ROUNDF])
  REPLACE_ROUNDL=0;            AC_SUBST([REPLACE_ROUNDL])
  REPLACE_SIGNBIT=0;           AC_SUBST([REPLACE_SIGNBIT])
  REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
+  REPLACE_TRUNCL=0;            AC_SUBST([REPLACE_TRUNCL])
 ])
diff --git a/gl/m4/mbrtowc.m4 b/gl/m4/mbrtowc.m4
new file mode 100644
index 00000000..726497b6
--- /dev/null
+++ b/gl/m4/mbrtowc.m4
@@ -0,0 +1,325 @@
+# mbrtowc.m4 serial 13
+dnl Copyright (C) 2001-2002, 2004-2005, 2008, 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_MBRTOWC],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+  if test $REPLACE_MBSTATE_T = 1; then
+    REPLACE_MBRTOWC=1
+  fi
+  AC_CHECK_FUNCS_ONCE([mbrtowc])
+  if test $ac_cv_func_mbrtowc = no; then
+    HAVE_MBRTOWC=0
+  fi
+  if test $HAVE_MBRTOWC != 0 && test $REPLACE_MBRTOWC != 1; then
+    gl_MBRTOWC_NULL_ARG
+    gl_MBRTOWC_RETVAL
+    gl_MBRTOWC_NUL_RETVAL
+    case "$gl_cv_func_mbrtowc_null_arg" in
+      *yes) ;;
+      *) AC_DEFINE([MBRTOWC_NULL_ARG_BUG], [1],
+           [Define if the mbrtowc function has the NULL string argument bug.])
+         REPLACE_MBRTOWC=1
+         ;;
+    esac
+    case "$gl_cv_func_mbrtowc_retval" in
+      *yes) ;;
+      *) AC_DEFINE([MBRTOWC_RETVAL_BUG], [1],
+           [Define if the mbrtowc function returns a wrong return value.])
+         REPLACE_MBRTOWC=1
+         ;;
+    esac
+    case "$gl_cv_func_mbrtowc_nul_retval" in
+      *yes) ;;
+      *) AC_DEFINE([MBRTOWC_NUL_RETVAL_BUG], [1],
+           [Define if the mbrtowc function does not return 0 for a NUL character.])
+         REPLACE_MBRTOWC=1
+         ;;
+    esac
+  fi
+  if test $HAVE_MBRTOWC = 0 || test $REPLACE_MBRTOWC = 1; then
+    gl_REPLACE_WCHAR_H
+    AC_LIBOBJ([mbrtowc])
+    gl_PREREQ_MBRTOWC
+  fi
+])
+dnl Test whether mbsinit() and mbrtowc() need to be overridden in a way that
+dnl redefines the semantics of the given mbstate_t type.
+dnl Result is REPLACE_MBSTATE_T.
+dnl When this is set to 1, we replace both mbsinit() and mbrtowc(), in order to
+dnl avoid inconsistencies.
+AC_DEFUN([gl_MBSTATE_T_BROKEN],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_CHECK_FUNCS_ONCE([mbsinit])
+  AC_CHECK_FUNCS_ONCE([mbrtowc])
+  if test $ac_cv_func_mbsinit = yes && test $ac_cv_func_mbrtowc = yes; then
+    gl_MBRTOWC_INCOMPLETE_STATE
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) REPLACE_MBSTATE_T=0 ;;
+      *)    REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+  if test $REPLACE_MBSTATE_T = 1; then
+    gl_REPLACE_WCHAR_H
+  fi
+])
+dnl Test whether mbrtowc puts the state into non-initial state when parsing an
+dnl incomplete multibyte character.
+dnl Result is gl_cv_func_mbrtowc_incomplete_state.
+AC_DEFUN([gl_MBRTOWC_INCOMPLETE_STATE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc handles incomplete characters],
+    [gl_cv_func_mbrtowc_incomplete_state],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+              # Guess no on AIX and OSF/1.
+        osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+              # Guess yes otherwise.
+        *)    gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_JA != none; then
+        AC_TRY_RUN([
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 1;
+    }
+  return 0;
+}],
+          [gl_cv_func_mbrtowc_incomplete_state=yes],
+          [gl_cv_func_mbrtowc_incomplete_state=no],
+          [])
+      fi
+    ])
+])
+dnl Test whether mbrtowc supports a NULL string argument correctly.
+dnl Result is gl_cv_func_mbrtowc_null_arg.
+AC_DEFUN([gl_MBRTOWC_NULL_ARG],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc handles a NULL string argument],
+    [gl_cv_func_mbrtowc_null_arg],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+              # Guess no on OSF/1.
+        osf*) gl_cv_func_mbrtowc_null_arg="guessing no" ;;
+              # Guess yes otherwise.
+        *)    gl_cv_func_mbrtowc_null_arg="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none; then
+        AC_TRY_RUN([
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+      int ret;
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      mbrtowc (&wc, NULL, 5, &state);
+      /* Check that wc was not modified.  */
+      if (wc != (wchar_t) 0xBADFACE)
+        return 1;
+    }
+  return 0;
+}], [gl_cv_func_mbrtowc_null_arg=yes], [gl_cv_func_mbrtowc_null_arg=no], [])
+      fi
+    ])
+])
+dnl Test whether mbrtowc, when parsing the end of a multibyte character,
+dnl correctly returns the number of bytes that were needed to complete the
+dnl character (not the total number of bytes of the multibyte character).
+dnl Result is gl_cv_func_mbrtowc_retval.
+AC_DEFUN([gl_MBRTOWC_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc has a correct return value],
+    [gl_cv_func_mbrtowc_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                          # Guess no on HP-UX and Solaris.
+        hpux* | solaris*) gl_cv_func_mbrtowc_retval="guessing no" ;;
+                          # Guess yes otherwise.
+        *)                gl_cv_func_mbrtowc_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
+        AC_TRY_RUN([
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 1)
+            return 1;
+        }
+    }
+  /* This fails on HP-UX 11.11.  */
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 2)
+            return 1;
+        }
+    }
+  return 0;
+}],
+          [gl_cv_func_mbrtowc_retval=yes],
+          [gl_cv_func_mbrtowc_retval=no],
+          [])
+      fi
+    ])
+])
+dnl Test whether mbrtowc, when parsing a NUL character, correctly returns 0.
+dnl Result is gl_cv_func_mbrtowc_nul_retval.
+AC_DEFUN([gl_MBRTOWC_NUL_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc returns 0 when parsing a NUL character],
+    [gl_cv_func_mbrtowc_nul_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                    # Guess no on Solaris 9.
+        solaris2.9) gl_cv_func_mbrtowc_nul_retval="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_nul_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_ZH_CN != none; then
+        AC_TRY_RUN([
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 9.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "", 1, &state) != 0)
+        return 1;
+    }
+  return 0;
+}],
+          [gl_cv_func_mbrtowc_nul_retval=yes],
+          [gl_cv_func_mbrtowc_nul_retval=no],
+          [])
+      fi
+    ])
+])
+# Prerequisites of lib/mbrtowc.c.
+AC_DEFUN([gl_PREREQ_MBRTOWC], [
+  :
+])
+dnl From Paul Eggert
+dnl This override of an autoconf macro can be removed when autoconf 2.60 or
+dnl newer can be assumed everywhere.
+m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.60]),[-1],[
+AC_DEFUN([AC_FUNC_MBRTOWC],
+[
+  dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60.
+  AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared],
+    gl_cv_func_mbrtowc,
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+            [[#include <wchar.h>]],
+            [[wchar_t wc;
+              char const s[] = "";
+              size_t n = 1;
+              mbstate_t state;
+              return ! (sizeof state && (mbrtowc) (&wc, s, n, &state));]])],
+       gl_cv_func_mbrtowc=yes,
+       gl_cv_func_mbrtowc=no)])
+  if test $gl_cv_func_mbrtowc = yes; then
+    AC_DEFINE([HAVE_MBRTOWC], [1],
+      [Define to 1 if mbrtowc and mbstate_t are properly declared.])
+  fi
+])
+])
diff --git a/gl/m4/mbsinit.m4 b/gl/m4/mbsinit.m4
new file mode 100644
index 00000000..03b055cd
--- /dev/null
+++ b/gl/m4/mbsinit.m4
@@ -0,0 +1,30 @@
+# mbsinit.m4 serial 3
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_MBSINIT],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+  if test $REPLACE_MBSTATE_T = 1; then
+    REPLACE_MBSINIT=1
+  fi
+  AC_CHECK_FUNCS_ONCE([mbsinit])
+  if test $ac_cv_func_mbsinit = no; then
+    HAVE_MBSINIT=0
+  fi
+  if test $HAVE_MBSINIT = 0 || test $REPLACE_MBSINIT = 1; then
+    gl_REPLACE_WCHAR_H
+    AC_LIBOBJ([mbsinit])
+    gl_PREREQ_MBSINIT
+  fi
+])
+# Prerequisites of lib/mbsinit.c.
+AC_DEFUN([gl_PREREQ_MBSINIT], [
+  :
+])
diff --git a/gl/m4/mbstate_t.m4 b/gl/m4/mbstate_t.m4
index df2a275c..d4ec6f0f 100644
--- a/gl/m4/mbstate_t.m4
+++ b/gl/m4/mbstate_t.m4
@@ -1,5 +1,5 @@
-# mbstate_t.m4 serial 9
+# mbstate_t.m4 serial 12
-dnl Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,18 +13,22 @@ dnl with or without modifications, as long as this notice is preserved.
 # AC_TYPE_MBSTATE_T
 # -----------------
 AC_DEFUN([AC_TYPE_MBSTATE_T],
-  [AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t,
+[
+   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
+   AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
-           [AC_INCLUDES_DEFAULT
+           [AC_INCLUDES_DEFAULT[
-#           include <wchar.h>],
+#           include <wchar.h>]],
-           [mbstate_t x; return sizeof x;])],
+           [[mbstate_t x; return sizeof x;]])],
        [ac_cv_type_mbstate_t=yes],
        [ac_cv_type_mbstate_t=no])])
   if test $ac_cv_type_mbstate_t = yes; then
-     AC_DEFINE([HAVE_MBSTATE_T], 1,
+     AC_DEFINE([HAVE_MBSTATE_T], [1],
               [Define to 1 if <wchar.h> declares mbstate_t.])
   else
-     AC_DEFINE([mbstate_t], int,
+     AC_DEFINE([mbstate_t], [int],
               [Define to a type if <wchar.h> does not define.])
-   fi])
+   fi
+])
diff --git a/gl/m4/mountlist.m4 b/gl/m4/mountlist.m4
index c25f44e7..f62c57a2 100644
--- a/gl/m4/mountlist.m4
+++ b/gl/m4/mountlist.m4
@@ -1,5 +1,5 @@
-#serial 9
+# serial 10
-dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,7 +9,7 @@ AC_DEFUN([gl_MOUNTLIST],
  gl_LIST_MOUNTED_FILE_SYSTEMS([gl_cv_list_mounted_fs=yes],
                               [gl_cv_list_mounted_fs=no])
  if test $gl_cv_list_mounted_fs = yes; then
-    AC_LIBOBJ(mountlist)
+    AC_LIBOBJ([mountlist])
    gl_PREREQ_MOUNTLIST_EXTRA
  fi
 ])
@@ -18,6 +18,6 @@ AC_DEFUN([gl_MOUNTLIST],
 AC_DEFUN([gl_PREREQ_MOUNTLIST_EXTRA],
 [
  dnl Note gl_LIST_MOUNTED_FILE_SYSTEMS checks for mntent.h, not sys/mntent.h.
-  AC_CHECK_HEADERS(sys/mntent.h)
+  AC_CHECK_HEADERS([sys/mntent.h])
  gl_FSTYPENAME
 ])
diff --git a/gl/m4/multiarch.m4 b/gl/m4/multiarch.m4
new file mode 100644
index 00000000..7b73e15e
--- /dev/null
+++ b/gl/m4/multiarch.m4
@@ -0,0 +1,74 @@
+# multiarch.m4 serial 3
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+# Determine whether the compiler is or may be producing universal binaries.
+#
+# On MacOS X 10.5 and later systems, the user can create libraries and
+# executables that work on multiple system types--known as "fat" or
+# "universal" binaries--by specifying multiple '-arch' options to the
+# compiler but only a single '-arch' option to the preprocessor.  Like
+# this:
+#
+#     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+#                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+#                 CPP="gcc -E" CXXCPP="g++ -E"
+#
+# Detect this situation and set the macro AA_APPLE_UNIVERSAL_BUILD at the
+# beginning of config.h and set APPLE_UNIVERSAL_BUILD accordingly.
+AC_DEFUN([gl_MULTIARCH],
+[
+  dnl This AC_REQUIRE is not necessary in theory. It works around a bug in
+  dnl autoconf <= 2.63: AC_REQUIRE invocations inside AC_REQUIREd macros are
+  dnl being handled better than AC_REQUIRE invocations inside normally invoked
+  dnl macros.
+  AC_REQUIRE([gl_MULTIARCH_BODY])
+])
+AC_DEFUN([gl_MULTIARCH_BODY],
+[
+  dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN.
+  gl_cv_c_multiarch=no
+  AC_COMPILE_IFELSE(
+    [AC_LANG_SOURCE(
+      [[#ifndef __APPLE_CC__
+         not a universal capable compiler
+        #endif
+        typedef int dummy;
+      ]])],
+    [
+     dnl Check for potential -arch flags.  It is not universal unless
+     dnl there are at least two -arch flags with different values.
+     arch=
+     prev=
+     for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do
+       if test -n "$prev"; then
+         case $word in
+           i?86 | x86_64 | ppc | ppc64)
+             if test -z "$arch" || test "$arch" = "$word"; then
+               arch="$word"
+             else
+               gl_cv_c_multiarch=yes
+             fi
+             ;;
+         esac
+         prev=
+       else
+         if test "x$word" = "x-arch"; then
+           prev=arch
+         fi
+       fi
+     done
+    ])
+  if test $gl_cv_c_multiarch = yes; then
+    AC_DEFINE([AA_APPLE_UNIVERSAL_BUILD], [1],
+      [Define if the compiler is building for multiple architectures of Apple platforms at once.])
+    APPLE_UNIVERSAL_BUILD=1
+  else
+    APPLE_UNIVERSAL_BUILD=0
+  fi
+  AC_SUBST([APPLE_UNIVERSAL_BUILD])
+])
diff --git a/gl/m4/netdb_h.m4 b/gl/m4/netdb_h.m4
new file mode 100644
index 00000000..5a12251f
--- /dev/null
+++ b/gl/m4/netdb_h.m4
@@ -0,0 +1,45 @@
+# netdb_h.m4 serial 5
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_HEADER_NETDB],
+[
+  AC_REQUIRE([gl_NETDB_H_DEFAULTS])
+  gl_CHECK_NEXT_HEADERS([netdb.h])
+  if test $ac_cv_header_netdb_h = yes; then
+    AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM([[
+         #include <netdb.h>
+         struct addrinfo a;
+         int b = EAI_OVERFLOW;
+         int c = AI_NUMERICSERV;
+       ]])],
+      [NETDB_H=''], [NETDB_H='netdb.h'])
+    HAVE_NETDB_H=1
+  else
+    NETDB_H='netdb.h'
+    HAVE_NETDB_H=0
+  fi
+  AC_SUBST([HAVE_NETDB_H])
+  AC_SUBST([NETDB_H])
+])
+AC_DEFUN([gl_NETDB_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_NETDB_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+AC_DEFUN([gl_NETDB_H_DEFAULTS],
+[
+  GNULIB_GETADDRINFO=0; AC_SUBST([GNULIB_GETADDRINFO])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_STRUCT_ADDRINFO=1;   AC_SUBST([HAVE_STRUCT_ADDRINFO])
+  HAVE_DECL_FREEADDRINFO=1; AC_SUBST([HAVE_DECL_FREEADDRINFO])
+  HAVE_DECL_GAI_STRERROR=1; AC_SUBST([HAVE_DECL_GAI_STRERROR])
+  HAVE_DECL_GETADDRINFO=1;  AC_SUBST([HAVE_DECL_GETADDRINFO])
+  HAVE_DECL_GETNAMEINFO=1;  AC_SUBST([HAVE_DECL_GETNAMEINFO])
+])
diff --git a/gl/m4/netinet_in_h.m4 b/gl/m4/netinet_in_h.m4
index 096be740..47fd9cc3 100644
--- a/gl/m4/netinet_in_h.m4
+++ b/gl/m4/netinet_in_h.m4
@@ -1,5 +1,5 @@
-# netinet_in_h.m4 serial 3
+# netinet_in_h.m4 serial 4
-dnl Copyright (C) 2006-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,7 +9,7 @@ AC_DEFUN([gl_HEADER_NETINET_IN],
  AC_CACHE_CHECK([whether <netinet/in.h> is self-contained],
    [gl_cv_header_netinet_in_h_selfcontained],
    [
-      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <netinet/in.h>], [])],
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>]], [[]])],
        [gl_cv_header_netinet_in_h_selfcontained=yes],
        [gl_cv_header_netinet_in_h_selfcontained=no])
    ])
diff --git a/gl/m4/nls.m4 b/gl/m4/nls.m4
index 7967cc2f..0b364342 100644
--- a/gl/m4/nls.m4
+++ b/gl/m4/nls.m4
@@ -1,5 +1,5 @@
-# nls.m4 serial 3 (gettext-0.15)
+# nls.m4 serial 5 (gettext-0.18)
-dnl Copyright (C) 1995-2003, 2005-2006 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2003, 2005-2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -17,15 +17,15 @@ dnl Authors:
 dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
 dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
-AC_PREREQ(2.50)
+AC_PREREQ([2.50])
 AC_DEFUN([AM_NLS],
 [
  AC_MSG_CHECKING([whether NLS is requested])
  dnl Default is enabled NLS
-  AC_ARG_ENABLE(nls,
+  AC_ARG_ENABLE([nls],
    [  --disable-nls           do not use Native Language Support],
    USE_NLS=$enableval, USE_NLS=yes)
-  AC_MSG_RESULT($USE_NLS)
+  AC_MSG_RESULT([$USE_NLS])
-  AC_SUBST(USE_NLS)
+  AC_SUBST([USE_NLS])
 ])
diff --git a/gl/m4/onceonly_2_57.m4 b/gl/m4/onceonly.m4
index 15884b3e..108cd6c1 100644
--- a/gl/m4/onceonly_2_57.m4
+++ b/gl/m4/onceonly.m4
@@ -1,5 +1,5 @@
-# onceonly_2_57.m4 serial 4
+# onceonly.m4 serial 6
-dnl Copyright (C) 2002-2003, 2005-2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2006, 2008 Free Software Foundation, Inc.
 dnl This file is free software, distributed under the terms of the GNU
 dnl General Public License.  As a special exception to the GNU General
 dnl Public License, this file may be distributed as part of a program
@@ -21,19 +21,23 @@ dnl inside an AC_DEFUNed function, the gl_CHECK_HEADERS macro call expands to
 dnl empty, and the check will be inserted before the body of the AC_DEFUNed
 dnl function.
-dnl This is like onceonly.m4, except that it uses diversions to named sections
+dnl The original code implemented AC_CHECK_HEADERS_ONCE and AC_CHECK_FUNCS_ONCE
-dnl DEFAULTS and INIT_PREPARE in order to check all requested headers at once,
+dnl in terms of AC_DEFUN and AC_REQUIRE. This implementation uses diversions to
-dnl thus reducing the size of 'configure'. Works with autoconf-2.57. The
+dnl named sections DEFAULTS and INIT_PREPARE in order to check all requested
-dnl size reduction is ca. 9%.
+dnl headers at once, thus reducing the size of 'configure'. It is known to work
+dnl with autoconf 2.57..2.62 at least . The size reduction is ca. 9%.
-dnl Autoconf version 2.57 or newer is recommended.
+dnl Autoconf version 2.59 plus gnulib is required; this file is not needed
-AC_PREREQ(2.57)
+dnl with Autoconf 2.60 or greater. But note that autoconf's implementation of
+dnl AC_CHECK_DECLS_ONCE expects a comma-separated list of symbols as first
+dnl argument!
+AC_PREREQ([2.59])
 # AC_CHECK_HEADERS_ONCE(HEADER1 HEADER2 ...) is a once-only variant of
 # AC_CHECK_HEADERS(HEADER1 HEADER2 ...).
 AC_DEFUN([AC_CHECK_HEADERS_ONCE], [
  :
-  AC_FOREACH([gl_HEADER_NAME], [$1], [
+  m4_foreach_w([gl_HEADER_NAME], [$1], [
    AC_DEFUN([gl_CHECK_HEADER_]m4_quote(translit(gl_HEADER_NAME,
                                                 [./-], [___])), [
      m4_divert_text([INIT_PREPARE],
@@ -56,7 +60,7 @@ m4_define([gl_HEADERS_EXPANSION], [
 # AC_CHECK_FUNCS(FUNC1 FUNC2 ...).
 AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
  :
-  AC_FOREACH([gl_FUNC_NAME], [$1], [
+  m4_foreach_w([gl_FUNC_NAME], [$1], [
    AC_DEFUN([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]), [
      m4_divert_text([INIT_PREPARE],
        [gl_func_list="$gl_func_list gl_FUNC_NAME"])
@@ -77,7 +81,7 @@ m4_define([gl_FUNCS_EXPANSION], [
 # AC_CHECK_DECLS(DECL1, DECL2, ...).
 AC_DEFUN([AC_CHECK_DECLS_ONCE], [
  :
-  AC_FOREACH([gl_DECL_NAME], [$1], [
+  m4_foreach_w([gl_DECL_NAME], [$1], [
    AC_DEFUN([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]), [
      AC_CHECK_DECLS(m4_defn([gl_DECL_NAME]))
    ])
diff --git a/gl/m4/open.m4 b/gl/m4/open.m4
new file mode 100644
index 00000000..6e286c96
--- /dev/null
+++ b/gl/m4/open.m4
@@ -0,0 +1,66 @@
+# open.m4 serial 5
+dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_OPEN],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw* | pw*)
+      gl_REPLACE_OPEN
+      ;;
+    *)
+      dnl open("foo/") should not create a file when the file name has a
+      dnl trailing slash.
+      AC_CACHE_CHECK([whether open recognizes a trailing slash],
+        [gl_cv_func_open_slash],
+        [
+          AC_TRY_RUN([
+#include <fcntl.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+int main ()
+{
+  return open ("conftest.sl/", O_CREAT, 0600) >= 0;
+}], [gl_cv_func_open_slash=yes], [gl_cv_func_open_slash=no],
+            [
+changequote(,)dnl
+             case "$host_os" in
+               solaris2.[0-9]*) gl_cv_func_open_slash="guessing no" ;;
+               hpux*)           gl_cv_func_open_slash="guessing no" ;;
+               *)               gl_cv_func_open_slash="guessing yes" ;;
+             esac
+changequote([,])dnl
+            ])
+          rm -f conftest.sl
+        ])
+      case "$gl_cv_func_open_slash" in
+        *no)
+          AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1],
+            [Define to 1 if open() fails to recognize a trailing slash.])
+          gl_REPLACE_OPEN
+          ;;
+      esac
+      ;;
+  esac
+])
+AC_DEFUN([gl_REPLACE_OPEN],
+[
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  if test $REPLACE_OPEN != 1; then
+    AC_LIBOBJ([open])
+    gl_PREREQ_OPEN
+  fi
+  REPLACE_OPEN=1
+])
+# Prerequisites of lib/open.c.
+AC_DEFUN([gl_PREREQ_OPEN],
+[
+  AC_REQUIRE([AC_C_INLINE])
+  :
+])
diff --git a/gl/m4/po.m4 b/gl/m4/po.m4
index 0734762a..2284fa50 100644
--- a/gl/m4/po.m4
+++ b/gl/m4/po.m4
@@ -1,5 +1,5 @@
-# po.m4 serial 15 (gettext-0.17)
+# po.m4 serial 17 (gettext-0.18)
-dnl Copyright (C) 1995-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -17,7 +17,7 @@ dnl Authors:
 dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
 dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
-AC_PREREQ(2.50)
+AC_PREREQ([2.50])
 dnl Checks for all prerequisites of the po subdirectory.
 AC_DEFUN([AM_PO_SUBDIRS],
@@ -41,7 +41,7 @@ AC_DEFUN([AM_PO_SUBDIRS],
    [$ac_dir/$ac_word --statistics /dev/null >&]AS_MESSAGE_LOG_FD[ 2>&1 &&
     (if $ac_dir/$ac_word --statistics /dev/null 2>&1 >/dev/null | grep usage >/dev/null; then exit 1; else exit 0; fi)],
    :)
-  AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
+  AC_PATH_PROG([GMSGFMT], [gmsgfmt], [$MSGFMT])
  dnl Test whether it is GNU msgfmt >= 0.15.
 changequote(,)dnl
diff --git a/gl/m4/printf-posix.m4 b/gl/m4/printf-posix.m4
index 14ba6128..5922d278 100644
--- a/gl/m4/printf-posix.m4
+++ b/gl/m4/printf-posix.m4
@@ -1,5 +1,5 @@
-# printf-posix.m4 serial 3 (gettext-0.17)
+# printf-posix.m4 serial 5 (gettext-0.18)
-dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2003, 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -27,17 +27,18 @@ int main ()
  return (strcmp (buf, "55 33") != 0);
 }], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,
      [
-        AC_EGREP_CPP(notposix, [
+        AC_EGREP_CPP([notposix], [
 #if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
  notposix
 #endif
-        ], gt_cv_func_printf_posix="guessing no",
+          ],
-           gt_cv_func_printf_posix="guessing yes")
+          [gt_cv_func_printf_posix="guessing no"],
+          [gt_cv_func_printf_posix="guessing yes"])
      ])
    ])
  case $gt_cv_func_printf_posix in
    *yes)
-      AC_DEFINE(HAVE_POSIX_PRINTF, 1,
+      AC_DEFINE([HAVE_POSIX_PRINTF], [1],
        [Define if your printf() function supports format strings with positions.])
      ;;
  esac
diff --git a/gl/m4/printf.m4 b/gl/m4/printf.m4
new file mode 100644
index 00000000..4d109935
--- /dev/null
+++ b/gl/m4/printf.m4
@@ -0,0 +1,1322 @@
+# printf.m4 serial 26
+dnl Copyright (C) 2003, 2007-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl Test whether the *printf family of functions supports the 'j', 'z', 't',
+dnl 'L' size specifiers. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_sizes_c99.
+AC_DEFUN([gl_PRINTF_SIZES_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
+  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
+    [gl_cv_func_printf_sizes_c99],
+    [
+      AC_TRY_RUN([
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#if HAVE_STDINT_H_WITH_UINTMAX
+# include <stdint.h>
+#endif
+#if HAVE_INTTYPES_H_WITH_UINTMAX
+# include <inttypes.h>
+#endif
+static char buf[100];
+int main ()
+{
+#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
+  buf[0] = '\0';
+  if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    return 1;
+#endif
+  buf[0] = '\0';
+  if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0
+      || strcmp (buf, "12345672 33") != 0)
+    return 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0
+      || strcmp (buf, "12345673 33") != 0)
+    return 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0
+      || strcmp (buf, "1.5 33") != 0)
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_sizes_c99=yes], [gl_cv_func_printf_sizes_c99=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_printf_sizes_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_sizes_c99="guessing no";;
+         darwin*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_printf_sizes_c99="guessing no";;
+         openbsd*)             gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.10.
+         solaris2.[0-9]*)      gl_cv_func_printf_sizes_c99="guessing no";;
+         solaris*)             gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_printf_sizes_c99="guessing no";;
+         netbsd*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_sizes_c99="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports 'long double'
+dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_long_double.
+AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports 'long double' arguments],
+    [gl_cv_func_printf_long_double],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[10000];
+int main ()
+{
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.750000 33") != 0)
+    return 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.750000e+00 33") != 0)
+    return 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.75 33") != 0)
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_long_double=yes], [gl_cv_func_printf_long_double=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+         beos*)        gl_cv_func_printf_long_double="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
+         *)            gl_cv_func_printf_long_double="guessing yes";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite.
+AC_DEFUN([gl_PRINTF_INFINITE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
+    [gl_cv_func_printf_infinite],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+        start_index++;
+      if (start_index + 3 <= end_index
+          && memcmp (string + start_index, "nan", 3) == 0)
+        {
+          start_index += 3;
+          if (start_index == end_index
+              || (string[start_index] == '(' && string[end_index - 1] == ')'))
+            return 1;
+        }
+    }
+  return 0;
+}
+static char buf[10000];
+static double zero = 0.0;
+int main ()
+{
+  if (sprintf (buf, "%f", 1.0 / 0.0) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%f", -1.0 / 0.0) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%f", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+  if (sprintf (buf, "%e", 1.0 / 0.0) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%e", -1.0 / 0.0) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%e", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+  if (sprintf (buf, "%g", 1.0 / 0.0) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%g", -1.0 / 0.0) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%g", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_infinite=yes], [gl_cv_func_printf_infinite=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on FreeBSD >= 6.
+         freebsd[1-5]*)        gl_cv_func_printf_infinite="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_infinite="guessing no";;
+         darwin*)              gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on HP-UX >= 11.
+         hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
+         hpux*)                gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_printf_infinite="guessing no";;
+         netbsd*)              gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_printf_infinite="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_infinite="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite_long_double.
+AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
+[
+  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_C_BIGENDIAN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl The user can set or unset the variable gl_printf_safe to indicate
+  dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
+  if test -n "$gl_printf_safe"; then
+    AC_DEFINE([CHECK_PRINTF_SAFE], [1],
+      [Define if you wish *printf() functions that have a safe handling of
+       non-IEEE-754 'long double' values.])
+  fi
+  case "$gl_cv_func_printf_long_double" in
+    *yes)
+      AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
+        [gl_cv_func_printf_infinite_long_double],
+        [
+          AC_TRY_RUN([
+]GL_NOCRASH[
+#include <float.h>
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+        start_index++;
+      if (start_index + 3 <= end_index
+          && memcmp (string + start_index, "nan", 3) == 0)
+        {
+          start_index += 3;
+          if (start_index == end_index
+              || (string[start_index] == '(' && string[end_index - 1] == ')'))
+            return 1;
+        }
+    }
+  return 0;
+}
+static char buf[10000];
+static long double zeroL = 0.0L;
+int main ()
+{
+  nocrash_init();
+  if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Lf", -1.0L / 0.0L) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+  if (sprintf (buf, "%Le", 1.0L / 0.0L) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Le", -1.0L / 0.0L) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Le", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+  if (sprintf (buf, "%Lg", 1.0L / 0.0L) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Lg", -1.0L / 0.0L) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    return 1;
+  if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    return 1;
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+/* Representation of an 80-bit 'long double' as an initializer for a sequence
+   of 'unsigned int' words.  */
+# ifdef WORDS_BIGENDIAN
+#  define LDBL80_WORDS(exponent,manthi,mantlo) \
+     { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
+       ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16),    \
+       (unsigned int) (mantlo) << 16                                        \
+     }
+# else
+#  define LDBL80_WORDS(exponent,manthi,mantlo) \
+     { mantlo, manthi, exponent }
+# endif
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+  }
+#endif
+  return 0;
+}],
+          [gl_cv_func_printf_infinite_long_double=yes],
+          [gl_cv_func_printf_infinite_long_double=no],
+          [
+changequote(,)dnl
+           case "$host_cpu" in
+                                   # Guess no on ia64, x86_64, i386.
+             ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
+             *)
+               case "$host_os" in
+                                       # Guess yes on glibc systems.
+                 *-gnu*)               gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on FreeBSD >= 6.
+                 freebsd[1-5]*)        gl_cv_func_printf_infinite_long_double="guessing no";;
+                 freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on MacOS X >= 10.3.
+                 darwin[1-6].*)        gl_cv_func_printf_infinite_long_double="guessing no";;
+                 darwin*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on HP-UX >= 11.
+                 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
+                 hpux*)                gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on NetBSD >= 3.
+                 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                       gl_cv_func_printf_infinite_long_double="guessing no";;
+                 netbsd*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # If we don't know, assume the worst.
+                 *)                    gl_cv_func_printf_infinite_long_double="guessing no";;
+               esac
+               ;;
+           esac
+changequote([,])dnl
+          ])
+        ])
+      ;;
+    *)
+      gl_cv_func_printf_infinite_long_double="irrelevant"
+      ;;
+  esac
+])
+dnl Test whether the *printf family of functions supports the 'a' and 'A'
+dnl conversion specifier for hexadecimal output of floating-point numbers.
+dnl (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_a.
+AC_DEFUN([gl_PRINTF_DIRECTIVE_A],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
+    [gl_cv_func_printf_directive_a],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0
+      || (strcmp (buf, "0x1.922p+1 33") != 0
+          && strcmp (buf, "0x3.244p+0 33") != 0
+          && strcmp (buf, "0x6.488p-1 33") != 0
+          && strcmp (buf, "0xc.91p-2 33") != 0))
+    return 1;
+  if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0
+      || (strcmp (buf, "-0X1.922P+1 33") != 0
+          && strcmp (buf, "-0X3.244P+0 33") != 0
+          && strcmp (buf, "-0X6.488P-1 33") != 0
+          && strcmp (buf, "-0XC.91P-2 33") != 0))
+    return 1;
+  /* This catches a FreeBSD 6.1 bug: it doesn't round.  */
+  if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
+      || (strcmp (buf, "0x1.83p+0 33") != 0
+          && strcmp (buf, "0x3.05p-1 33") != 0
+          && strcmp (buf, "0x6.0ap-2 33") != 0
+          && strcmp (buf, "0xc.14p-3 33") != 0))
+    return 1;
+  /* This catches a FreeBSD 6.1 bug.  See
+     <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
+  if (sprintf (buf, "%010a %d", 1.0 / 0.0, 33, 44, 55) < 0
+      || buf[0] == '0')
+    return 1;
+  /* This catches a MacOS X 10.3.9 (Darwin 7.9) bug.  */
+  if (sprintf (buf, "%.1a", 1.999) < 0
+      || (strcmp (buf, "0x1.0p+1") != 0
+          && strcmp (buf, "0x2.0p+0") != 0
+          && strcmp (buf, "0x4.0p-1") != 0
+          && strcmp (buf, "0x8.0p-2") != 0))
+    return 1;
+  /* This catches the same MacOS X 10.3.9 (Darwin 7.9) bug and also a
+     glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>.  */
+  if (sprintf (buf, "%.1La", 1.999L) < 0
+      || (strcmp (buf, "0x1.0p+1") != 0
+          && strcmp (buf, "0x2.0p+0") != 0
+          && strcmp (buf, "0x4.0p-1") != 0
+          && strcmp (buf, "0x8.0p-2") != 0))
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_directive_a=yes], [gl_cv_func_printf_directive_a=no],
+      [
+       case "$host_os" in
+                               # Guess yes on glibc >= 2.5 systems.
+         *-gnu*)
+           AC_EGREP_CPP([BZ2908], [
+             #include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)
+               BZ2908
+              #endif
+             #endif
+             ],
+             [gl_cv_func_printf_directive_a="guessing yes"],
+             [gl_cv_func_printf_directive_a="guessing no"])
+           ;;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_directive_a="guessing no";;
+       esac
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports the %F format
+dnl directive. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_f.
+AC_DEFUN([gl_PRINTF_DIRECTIVE_F],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'F' directive],
+    [gl_cv_func_printf_directive_f],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0
+      || strcmp (buf, "1234567.000000 33") != 0)
+    return 1;
+  if (sprintf (buf, "%F", 1.0 / 0.0) < 0
+      || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
+    return 1;
+  /* This catches a Cygwin 2007 bug.  */
+  if (sprintf (buf, "%.F", 1234.0) < 0
+      || strcmp (buf, "1234") != 0)
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_directive_f=yes], [gl_cv_func_printf_directive_f=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on FreeBSD >= 6.
+         freebsd[1-5]*)        gl_cv_func_printf_directive_f="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_directive_f="guessing no";;
+         darwin*)              gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on Solaris >= 2.10.
+         solaris2.[0-9]*)      gl_cv_func_printf_directive_f="guessing no";;
+         solaris*)             gl_cv_func_printf_directive_f="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_directive_f="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports the %n format
+dnl directive. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_n.
+AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'n' directive],
+    [gl_cv_func_printf_directive_n],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char fmtstring[10];
+static char buf[100];
+int main ()
+{
+  int count = -1;
+  /* Copy the format string.  Some systems (glibc with _FORTIFY_SOURCE=2)
+     support %n in format strings in read-only memory but not in writable
+     memory.  */
+  strcpy (fmtstring, "%d %n");
+  if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0
+      || strcmp (buf, "123 ") != 0
+      || count != 4)
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_directive_n=yes], [gl_cv_func_printf_directive_n=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+         *)     gl_cv_func_printf_directive_n="guessing yes";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports POSIX/XSI format
+dnl strings with positions. (POSIX:2001)
+dnl Result is gl_cv_func_printf_positions.
+AC_DEFUN([gl_PRINTF_POSITIONS],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
+    [gl_cv_func_printf_positions],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+/* The string "%2$d %1$d", with dollar characters protected from the shell's
+   dollar expansion (possibly an autoconf bug).  */
+static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
+static char buf[100];
+int main ()
+{
+  sprintf (buf, format, 33, 55);
+  return (strcmp (buf, "55 33") != 0);
+}], [gl_cv_func_printf_positions=yes], [gl_cv_func_printf_positions=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+         netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
+                       gl_cv_func_printf_positions="guessing no";;
+         beos*)        gl_cv_func_printf_positions="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
+         *)            gl_cv_func_printf_positions="guessing yes";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports POSIX/XSI format
+dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001)
+dnl Result is gl_cv_func_printf_flag_grouping.
+AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the grouping flag],
+    [gl_cv_func_printf_flag_grouping],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  if (sprintf (buf, "%'d %d", 1234567, 99) < 0
+      || buf[strlen (buf) - 1] != '9')
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_flag_grouping=yes], [gl_cv_func_printf_flag_grouping=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+         cygwin*)      gl_cv_func_printf_flag_grouping="guessing no";;
+         netbsd*)      gl_cv_func_printf_flag_grouping="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
+         *)            gl_cv_func_printf_flag_grouping="guessing yes";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports the - flag correctly.
+dnl (ISO C99.) See
+dnl <http://lists.gnu.org/archive/html/bug-coreutils/2008-02/msg00035.html>
+dnl Result is gl_cv_func_printf_flag_leftadjust.
+AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly],
+    [gl_cv_func_printf_flag_leftadjust],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  /* Check that a '-' flag is not annihilated by a negative width.  */
+  if (sprintf (buf, "a%-*sc", -3, "b") < 0
+      || strcmp (buf, "ab  c") != 0)
+    return 1;
+  return 0;
+}],
+        [gl_cv_func_printf_flag_leftadjust=yes],
+        [gl_cv_func_printf_flag_leftadjust=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                    # Guess yes on HP-UX 11.
+           hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                    # Guess no on HP-UX 10 and older.
+           hpux*)   gl_cv_func_printf_flag_leftadjust="guessing no";;
+                    # Guess yes otherwise.
+           *)       gl_cv_func_printf_flag_leftadjust="guessing yes";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+dnl Test whether the *printf family of functions supports padding of non-finite
+dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
+dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html>
+dnl Result is gl_cv_func_printf_flag_zero.
+AC_DEFUN([gl_PRINTF_FLAG_ZERO],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the zero flag correctly],
+    [gl_cv_func_printf_flag_zero],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  if (sprintf (buf, "%010f", 1.0 / 0.0, 33, 44, 55) < 0
+      || (strcmp (buf, "       inf") != 0
+          && strcmp (buf, "  infinity") != 0))
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_flag_zero=yes], [gl_cv_func_printf_flag_zero=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                 # Guess yes on glibc systems.
+         *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
+                 # Guess yes on BeOS.
+         beos*)  gl_cv_func_printf_flag_zero="guessing yes";;
+                 # If we don't know, assume the worst.
+         *)      gl_cv_func_printf_flag_zero="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions supports large precisions.
+dnl On mingw, precisions larger than 512 are treated like 512, in integer,
+dnl floating-point or pointer output. On BeOS, precisions larger than 1044
+dnl crash the program.
+dnl Result is gl_cv_func_printf_precision.
+AC_DEFUN([gl_PRINTF_PRECISION],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports large precisions],
+    [gl_cv_func_printf_precision],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[5000];
+int main ()
+{
+#ifdef __BEOS__
+  /* On BeOS, this would crash and show a dialog box.  Avoid the crash.  */
+  return 1;
+#endif
+  if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+         # Guess no only on native Win32 and BeOS systems.
+         mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;;
+         beos*)        gl_cv_func_printf_precision="guessing no" ;;
+         *)            gl_cv_func_printf_precision="guessing yes" ;;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the *printf family of functions recovers gracefully in case
+dnl of an out-of-memory condition, or whether it crashes the entire program.
+dnl Result is gl_cv_func_printf_enomem.
+AC_DEFUN([gl_PRINTF_ENOMEM],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gl_MULTIARCH])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf survives out-of-memory conditions],
+    [gl_cv_func_printf_enomem],
+    [
+      gl_cv_func_printf_enomem="guessing no"
+      if test "$cross_compiling" = no; then
+        if test $APPLE_UNIVERSAL_BUILD = 0; then
+          AC_LANG_CONFTEST([AC_LANG_SOURCE([
+]GL_NOCRASH[
+changequote(,)dnl
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <errno.h>
+int main()
+{
+  struct rlimit limit;
+  int ret;
+  nocrash_init ();
+  /* Some printf implementations allocate temporary space with malloc.  */
+  /* On BSD systems, malloc() is limited by RLIMIT_DATA.  */
+#ifdef RLIMIT_DATA
+  if (getrlimit (RLIMIT_DATA, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_DATA, &limit) < 0)
+    return 77;
+#endif
+  /* On Linux systems, malloc() is limited by RLIMIT_AS.  */
+#ifdef RLIMIT_AS
+  if (getrlimit (RLIMIT_AS, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_AS, &limit) < 0)
+    return 77;
+#endif
+  /* Some printf implementations allocate temporary space on the stack.  */
+#ifdef RLIMIT_STACK
+  if (getrlimit (RLIMIT_STACK, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_STACK, &limit) < 0)
+    return 77;
+#endif
+  ret = printf ("%.5000000f", 1.0);
+  return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
+}
+changequote([,])dnl
+          ])])
+          if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+            (./conftest
+             result=$?
+             if test $result != 0 && test $result != 77; then result=1; fi
+             exit $result
+            ) >/dev/null 2>/dev/null
+            case $? in
+              0) gl_cv_func_printf_enomem="yes" ;;
+              77) gl_cv_func_printf_enomem="guessing no" ;;
+              *) gl_cv_func_printf_enomem="no" ;;
+            esac
+          else
+            gl_cv_func_printf_enomem="guessing no"
+          fi
+          rm -fr conftest*
+        else
+          dnl A universal build on Apple MacOS X platforms.
+          dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode.
+          dnl But we need a configuration result that is valid in both modes.
+          gl_cv_func_printf_enomem="guessing no"
+        fi
+      fi
+      if test "$gl_cv_func_printf_enomem" = "guessing no"; then
+changequote(,)dnl
+        case "$host_os" in
+                    # Guess yes on glibc systems.
+          *-gnu*)   gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on Solaris.
+          solaris*) gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on AIX.
+          aix*)     gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on HP-UX/hppa.
+          hpux*)    case "$host_cpu" in
+                      hppa*) gl_cv_func_printf_enomem="guessing yes";;
+                      *)     gl_cv_func_printf_enomem="guessing no";;
+                    esac
+                    ;;
+                    # Guess yes on IRIX.
+          irix*)    gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on OSF/1.
+          osf*)     gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on BeOS.
+          beos*)    gl_cv_func_printf_enomem="guessing yes";;
+                    # Guess yes on Haiku.
+          haiku*)   gl_cv_func_printf_enomem="guessing yes";;
+                    # If we don't know, assume the worst.
+          *)        gl_cv_func_printf_enomem="guessing no";;
+        esac
+changequote([,])dnl
+      fi
+    ])
+])
+dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
+dnl Result is ac_cv_func_snprintf.
+AC_DEFUN([gl_SNPRINTF_PRESENCE],
+[
+  AC_CHECK_FUNCS_ONCE([snprintf])
+])
+dnl Test whether the string produced by the snprintf function is always NUL
+dnl terminated. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_snprintf_truncation_c99.
+AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
+    [gl_cv_func_snprintf_truncation_c99],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  snprintf (buf, 3, "%d %d", 4567, 89);
+  if (memcmp (buf, "45\0DEF", 6) != 0)
+    return 1;
+  return 0;
+}], [gl_cv_func_snprintf_truncation_c99=yes], [gl_cv_func_snprintf_truncation_c99=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+         darwin*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_snprintf_truncation_c99="guessing no";;
+         openbsd*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_truncation_c99="guessing no";;
+         solaris*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+         aix*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on HP-UX >= 11.
+         hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
+         hpux*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on OSF/1 >= 5.
+         osf[3-4]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+         osf*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_truncation_c99="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_truncation_c99="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the return value of the snprintf function is the number
+dnl of bytes (excluding the terminating NUL) that would have been produced
+dnl if the buffer had been large enough. (ISO C99, POSIX:2001)
+dnl For example, this test program fails on IRIX 6.5:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdio.h>
+dnl     int main()
+dnl     {
+dnl       static char buf[8];
+dnl       int retval = snprintf (buf, 3, "%d", 12345);
+dnl       return retval >= 0 && retval < 3;
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl Result is gl_cv_func_snprintf_retval_c99.
+AC_DEFUN([gl_SNPRINTF_RETVAL_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
+    [gl_cv_func_snprintf_retval_c99],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  if (snprintf (buf, 3, "%d %d", 4567, 89) != 7)
+    return 1;
+  return 0;
+}], [gl_cv_func_snprintf_retval_c99=yes], [gl_cv_func_snprintf_retval_c99=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+         darwin*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_snprintf_retval_c99="guessing no";;
+         openbsd*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_retval_c99="guessing no";;
+         solaris*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_retval_c99="guessing no";;
+         aix*)                 gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_retval_c99="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_retval_c99="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the snprintf function supports the %n format directive
+dnl also in truncated portions of the format string. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_snprintf_directive_n.
+AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
+    [gl_cv_func_snprintf_directive_n],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char fmtstring[10];
+static char buf[100];
+int main ()
+{
+  int count = -1;
+  /* Copy the format string.  Some systems (glibc with _FORTIFY_SOURCE=2)
+     support %n in format strings in read-only memory but not in writable
+     memory.  */
+  strcpy (fmtstring, "%d %n");
+  snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
+  if (count != 6)
+    return 1;
+  return 0;
+}], [gl_cv_func_snprintf_directive_n=yes], [gl_cv_func_snprintf_directive_n=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_directive_n="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_directive_n="guessing no";;
+         darwin*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_directive_n="guessing no";;
+         solaris*)             gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+         aix*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on OSF/1 >= 5.
+         osf[3-4]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+         osf*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_directive_n="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_directive_n="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl Test whether the snprintf function, when passed a size = 1, writes any
+dnl output without bounds in this case, behaving like sprintf. This is the
+dnl case on Linux libc5.
+dnl Result is gl_cv_func_snprintf_size1.
+AC_DEFUN([gl_SNPRINTF_SIZE1],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([whether snprintf respects a size of 1],
+    [gl_cv_func_snprintf_size1],
+    [
+      AC_TRY_RUN([
+#include <stdio.h>
+int main()
+{
+  static char buf[8] = "DEADBEEF";
+  snprintf (buf, 1, "%d", 12345);
+  return buf[1] != 'E';
+}],
+      [gl_cv_func_snprintf_size1=yes],
+      [gl_cv_func_snprintf_size1=no],
+      [gl_cv_func_snprintf_size1="guessing yes"])
+    ])
+])
+dnl Test whether the vsnprintf function, when passed a zero size, produces no
+dnl output. (ISO C99, POSIX:2001)
+dnl For example, snprintf nevertheless writes a NUL byte in this case
+dnl on OSF/1 5.1:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdio.h>
+dnl     int main()
+dnl     {
+dnl       static char buf[8] = "DEADBEEF";
+dnl       snprintf (buf, 0, "%d", 12345);
+dnl       return buf[0] != 'D';
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl And vsnprintf writes any output without bounds in this case, behaving like
+dnl vsprintf, on HP-UX 11 and OSF/1 5.1:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdarg.h>
+dnl     #include <stdio.h>
+dnl     static int my_snprintf (char *buf, int size, const char *format, ...)
+dnl     {
+dnl       va_list args;
+dnl       int ret;
+dnl       va_start (args, format);
+dnl       ret = vsnprintf (buf, size, format, args);
+dnl       va_end (args);
+dnl       return ret;
+dnl     }
+dnl     int main()
+dnl     {
+dnl       static char buf[8] = "DEADBEEF";
+dnl       my_snprintf (buf, 0, "%d", 12345);
+dnl       return buf[0] != 'D';
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl Result is gl_cv_func_vsnprintf_zerosize_c99.
+AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
+    [gl_cv_func_vsnprintf_zerosize_c99],
+    [
+      AC_TRY_RUN([
+#include <stdarg.h>
+#include <stdio.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+int main()
+{
+  static char buf[8] = "DEADBEEF";
+  my_snprintf (buf, 0, "%d", 12345);
+  return buf[0] != 'D';
+}],
+      [gl_cv_func_vsnprintf_zerosize_c99=yes],
+      [gl_cv_func_vsnprintf_zerosize_c99=no],
+      [
+changequote(,)dnl
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         darwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on Cygwin.
+         cygwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         solaris*)             gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         aix*)                 gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         netbsd*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on mingw.
+         mingw* | pw*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+       esac
+changequote([,])dnl
+      ])
+    ])
+])
+dnl The results of these tests on various platforms are:
+dnl
+dnl 1 = gl_PRINTF_SIZES_C99
+dnl 2 = gl_PRINTF_LONG_DOUBLE
+dnl 3 = gl_PRINTF_INFINITE
+dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE
+dnl 5 = gl_PRINTF_DIRECTIVE_A
+dnl 6 = gl_PRINTF_DIRECTIVE_F
+dnl 7 = gl_PRINTF_DIRECTIVE_N
+dnl 8 = gl_PRINTF_POSITIONS
+dnl 9 = gl_PRINTF_FLAG_GROUPING
+dnl 10 = gl_PRINTF_FLAG_LEFTADJUST
+dnl 11 = gl_PRINTF_FLAG_ZERO
+dnl 12 = gl_PRINTF_PRECISION
+dnl 13 = gl_PRINTF_ENOMEM
+dnl 14 = gl_SNPRINTF_PRESENCE
+dnl 15 = gl_SNPRINTF_TRUNCATION_C99
+dnl 16 = gl_SNPRINTF_RETVAL_C99
+dnl 17 = gl_SNPRINTF_DIRECTIVE_N
+dnl 18 = gl_SNPRINTF_SIZE1
+dnl 19 = gl_VSNPRINTF_ZEROSIZE_C99
+dnl
+dnl 1 = checking whether printf supports size specifiers as in C99...
+dnl 2 = checking whether printf supports 'long double' arguments...
+dnl 3 = checking whether printf supports infinite 'double' arguments...
+dnl 4 = checking whether printf supports infinite 'long double' arguments...
+dnl 5 = checking whether printf supports the 'a' and 'A' directives...
+dnl 6 = checking whether printf supports the 'F' directive...
+dnl 7 = checking whether printf supports the 'n' directive...
+dnl 8 = checking whether printf supports POSIX/XSI format strings with positions...
+dnl 9 = checking whether printf supports the grouping flag...
+dnl 10 = checking whether printf supports the left-adjust flag correctly...
+dnl 11 = checking whether printf supports the zero flag correctly...
+dnl 12 = checking whether printf supports large precisions...
+dnl 13 = checking whether printf survives out-of-memory conditions...
+dnl 14 = checking for snprintf...
+dnl 15 = checking whether snprintf truncates the result as in C99...
+dnl 16 = checking whether snprintf returns a byte count as in C99...
+dnl 17 = checking whether snprintf fully supports the 'n' directive...
+dnl 18 = checking whether snprintf respects a size of 1...
+dnl 19 = checking whether vsnprintf respects a zero size as in C99...
+dnl
+dnl . = yes, # = no.
+dnl
+dnl                                  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19
+dnl   glibc 2.5                      .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   glibc 2.3.6                    .  .  .  .  #  .  .  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   FreeBSD 5.4, 6.1               .  .  .  .  #  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   MacOS X 10.3.9                 .  .  .  .  #  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   OpenBSD 3.9, 4.0               .  .  #  #  #  #  .  .  #  .  #  .  #  .  .  .  .  .  .
+dnl   Cygwin 2007 (= Cygwin 1.5.24)  .  .  .  .  #  #  .  .  .  ?  #  ?  ?  .  .  .  .  .  .
+dnl   Cygwin 2006 (= Cygwin 1.5.19)  #  .  .  .  #  #  .  .  #  ?  #  ?  ?  .  .  .  .  .  .
+dnl   Solaris 10                     .  .  #  #  #  .  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Solaris 2.6 ... 9              #  .  #  #  #  #  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Solaris 2.5.1                  #  .  #  #  #  #  .  .  .  .  #  .  .  #  #  #  #  #  #
+dnl   AIX 5.2                        .  .  #  #  #  .  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   AIX 4.3.2, 5.1                 #  .  #  #  #  #  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   HP-UX 11.31                    .  .  .  .  #  .  .  .  .  .  #  .  .  .  .  #  #  .  .
+dnl   HP-UX 11.{00,11,23}            #  .  .  .  #  #  .  .  .  .  #  .  .  .  .  #  #  .  #
+dnl   HP-UX 10.20                    #  .  .  .  #  #  .  .  .  #  #  .  .  .  .  #  #  ?  #
+dnl   IRIX 6.5                       #  .  #  #  #  #  .  .  .  .  #  .  .  .  .  #  .  .  .
+dnl   OSF/1 5.1                      #  .  #  #  #  #  .  .  .  .  #  .  .  .  .  #  .  .  #
+dnl   OSF/1 4.0d                     #  .  #  #  #  #  .  .  .  .  #  .  .  #  #  #  #  #  #
+dnl   NetBSD 4.0                     .  ?  ?  ?  ?  ?  .  .  ?  ?  ?  ?  ?  .  .  .  ?  ?  ?
+dnl   NetBSD 3.0                     .  .  .  .  #  #  .  #  #  ?  #  .  #  .  .  .  .  .  .
+dnl   Haiku                          .  .  .  #  #  #  .  .  .  .  .  .  ?  .  .  .  .  .  .
+dnl   BeOS                           #  #  .  #  #  #  .  #  .  ?  .  #  ?  .  .  .  .  .  .
+dnl   mingw                          #  #  #  #  #  #  .  #  #  .  #  #  ?  .  #  #  #  .  .
diff --git a/gl/m4/progtest.m4 b/gl/m4/progtest.m4
index a56365cd..e1d445d2 100644
--- a/gl/m4/progtest.m4
+++ b/gl/m4/progtest.m4
@@ -1,5 +1,5 @@
-# progtest.m4 serial 4 (gettext-0.14.2)
+# progtest.m4 serial 6 (gettext-0.18)
-dnl Copyright (C) 1996-2003, 2005 Free Software Foundation, Inc.
+dnl Copyright (C) 1996-2003, 2005, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -16,7 +16,7 @@ dnl They are *not* in the public domain.
 dnl Authors:
 dnl   Ulrich Drepper <drepper@cygnus.com>, 1996.
-AC_PREREQ(2.50)
+AC_PREREQ([2.50])
 # Search path for a program which passes the given test.
@@ -55,7 +55,7 @@ rm -f conf$$.file
 # Extract the first word of "$2", so it can be a program name with args.
 set dummy $2; ac_word=[$]2
 AC_MSG_CHECKING([for $ac_word])
-AC_CACHE_VAL(ac_cv_path_$1,
+AC_CACHE_VAL([ac_cv_path_$1],
 [case "[$]$1" in
  [[\\/]]* | ?:[[\\/]]*)
    ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
@@ -84,9 +84,9 @@ ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
 esac])dnl
 $1="$ac_cv_path_$1"
 if test ifelse([$4], , [-n "[$]$1"], ["[$]$1" != "$4"]); then
-  AC_MSG_RESULT([$]$1)
+  AC_MSG_RESULT([$][$1])
 else
-  AC_MSG_RESULT(no)
+  AC_MSG_RESULT([no])
 fi
-AC_SUBST($1)dnl
+AC_SUBST([$1])dnl
 ])
diff --git a/gl/m4/regex.m4 b/gl/m4/regex.m4
index 7da6efed..43b04638 100644
--- a/gl/m4/regex.m4
+++ b/gl/m4/regex.m4
@@ -1,7 +1,7 @@
-#serial 48
+# serial 53
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
-# 2006, 2007 Free Software Foundation, Inc.
+# 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -17,7 +17,7 @@ AC_DEFUN([gl_REGEX],
  AC_CHECK_HEADERS_ONCE([locale.h])
  AC_ARG_WITH([included-regex],
-    [AC_HELP_STRING([--without-included-regex],
+    [AS_HELP_STRING([--without-included-regex],
                    [don't compile regex; this is the default on 32-bit
                     systems with recent-enough versions of the GNU C
                     Library (use with caution on other systems).
@@ -37,13 +37,13 @@ AC_DEFUN([gl_REGEX],
                   [gl_cv_func_re_compile_pattern_working],
      [AC_RUN_IFELSE(
        [AC_LANG_PROGRAM(
-          [AC_INCLUDES_DEFAULT
+          [AC_INCLUDES_DEFAULT[
           #if HAVE_LOCALE_H
            #include <locale.h>
           #endif
           #include <limits.h>
           #include <regex.h>
-           ],
+           ]],
          [[static struct re_pattern_buffer regex;
            unsigned char folded_chars[UCHAR_MAX + 1];
            int i;
@@ -175,7 +175,7 @@ AC_DEFUN([gl_REGEX],
  esac
  if test $ac_use_included_regex = yes; then
-    AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
+    AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
      [Define if you want regoff_t to be at least as wide POSIX requires.])
    AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
      [Define to rpl_re_syntax_options if the replacement should be used.])
@@ -217,6 +217,8 @@ AC_DEFUN([gl_PREREQ_REGEX],
 [
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  AC_REQUIRE([AC_C_RESTRICT])
-  AC_CHECK_FUNCS_ONCE([isblank iswctype mbrtowc wcrtomb wcscoll])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_CHECK_HEADERS([libintl.h])
+  AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
  AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
 ])
diff --git a/gl/m4/servent.m4 b/gl/m4/servent.m4
new file mode 100644
index 00000000..242f9e36
--- /dev/null
+++ b/gl/m4/servent.m4
@@ -0,0 +1,47 @@
+# servent.m4 serial 1
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_SERVENT],
+[
+  dnl Where are getservent(), setservent(), endservent(), getservbyname(),
+  dnl getservbyport() defined?
+  dnl Where are getprotoent(), setprotoent(), endprotoent(), getprotobyname(),
+  dnl getprotobynumber() defined?
+  dnl - On Solaris, they are in libsocket. Ignore libxnet.
+  dnl - On Haiku, they are in libnetwork.
+  dnl - On BeOS, they are in libnet.
+  dnl - On native Windows, they are in ws2_32.dll.
+  dnl - Otherwise they are in libc.
+  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
+  SERVENT_LIB=
+  gl_saved_libs="$LIBS"
+  AC_SEARCH_LIBS([getservbyname], [socket network net],
+    [if test "$ac_cv_search_getservbyname" != "none required"; then
+       SERVENT_LIB="$ac_cv_search_getservbyname"
+     fi])
+  LIBS="$gl_saved_libs"
+  if test -z "$SERVENT_LIB"; then
+    AC_CHECK_FUNCS([getservbyname], , [
+      AC_CACHE_CHECK([for getservbyname in winsock2.h and -lws2_32],
+        [gl_cv_w32_getservbyname],
+        [gl_cv_w32_getservbyname=no
+         gl_save_LIBS="$LIBS"
+         LIBS="$LIBS -lws2_32"
+         AC_TRY_LINK([
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#include <stddef.h>
+], [getservbyname(NULL,NULL);], [gl_cv_w32_getservbyname=yes])
+         LIBS="$gl_save_LIBS"
+        ])
+      if test "$gl_cv_w32_getservbyname" = "yes"; then
+        SERVENT_LIB="-lws2_32"
+      fi
+    ])
+  fi
+  AC_SUBST([SERVENT_LIB])
+])
diff --git a/gl/m4/size_max.m4 b/gl/m4/size_max.m4
index 6cb48689..e0e7b3ff 100644
--- a/gl/m4/size_max.m4
+++ b/gl/m4/size_max.m4
@@ -1,5 +1,5 @@
-# size_max.m4 serial 6
+# size_max.m4 serial 7
-dnl Copyright (C) 2003, 2005-2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2003, 2005-2006, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,7 +8,7 @@ dnl From Bruno Haible.
 AC_DEFUN([gl_SIZE_MAX],
 [
-  AC_CHECK_HEADERS(stdint.h)
+  AC_CHECK_HEADERS([stdint.h])
  dnl First test whether the system already has SIZE_MAX.
  AC_MSG_CHECKING([for SIZE_MAX])
  AC_CACHE_VAL([gl_cv_size_max], [
@@ -21,16 +21,16 @@ AC_DEFUN([gl_SIZE_MAX],
 #ifdef SIZE_MAX
 Found it
 #endif
-], gl_cv_size_max=yes)
+], [gl_cv_size_max=yes])
    if test -z "$gl_cv_size_max"; then
      dnl Define it ourselves. Here we assume that the type 'size_t' is not wider
      dnl than the type 'unsigned long'. Try hard to find a definition that can
      dnl be used in a preprocessor #if, i.e. doesn't contain a cast.
      AC_COMPUTE_INT([size_t_bits_minus_1], [sizeof (size_t) * CHAR_BIT - 1],
        [#include <stddef.h>
-#include <limits.h>], size_t_bits_minus_1=)
+#include <limits.h>], [size_t_bits_minus_1=])
      AC_COMPUTE_INT([fits_in_uint], [sizeof (size_t) <= sizeof (unsigned int)],
-        [#include <stddef.h>], fits_in_uint=)
+        [#include <stddef.h>], [fits_in_uint=])
      if test -n "$size_t_bits_minus_1" && test -n "$fits_in_uint"; then
        if test $fits_in_uint = 1; then
          dnl Even though SIZE_MAX fits in an unsigned int, it must be of type
@@ -38,7 +38,7 @@ Found it
          AC_TRY_COMPILE([#include <stddef.h>
            extern size_t foo;
            extern unsigned long foo;
-            ], [], fits_in_uint=0)
+            ], [], [fits_in_uint=0])
        fi
        dnl We cannot use 'expr' to simplify this expression, because 'expr'
        dnl works only with 'long' integers in the host environment, while we
diff --git a/gl/m4/snprintf.m4 b/gl/m4/snprintf.m4
index f21200dc..6021786e 100644
--- a/gl/m4/snprintf.m4
+++ b/gl/m4/snprintf.m4
@@ -1,5 +1,5 @@
-# snprintf.m4 serial 4
+# snprintf.m4 serial 5
-dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2004, 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -7,8 +7,17 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_SNPRINTF],
 [
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  gl_cv_func_snprintf_usable=no
  AC_CHECK_FUNCS([snprintf])
-  if test $ac_cv_func_snprintf = no; then
+  if test $ac_cv_func_snprintf = yes; then
+    gl_SNPRINTF_SIZE1
+    case "$gl_cv_func_snprintf_size1" in
+      *yes)
+        gl_cv_func_snprintf_usable=yes
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_snprintf_usable = no; then
    gl_REPLACE_SNPRINTF
  fi
  AC_CHECK_DECLS_ONCE([snprintf])
diff --git a/gl/m4/sockpfaf.m4 b/gl/m4/sockpfaf.m4
index 25d9755c..99ea06f9 100644
--- a/gl/m4/sockpfaf.m4
+++ b/gl/m4/sockpfaf.m4
@@ -1,5 +1,5 @@
-# sockpfaf.m4 serial 5
+# sockpfaf.m4 serial 6
-dnl Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2004, 2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -16,8 +16,8 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
  AC_CHECK_HEADERS_ONCE([netinet/in.h])
-  AC_MSG_CHECKING(for IPv4 sockets)
+  AC_MSG_CHECKING([for IPv4 sockets])
-  AC_CACHE_VAL(gl_cv_socket_ipv4,
+  AC_CACHE_VAL([gl_cv_socket_ipv4],
    [AC_TRY_COMPILE([#include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
@@ -31,13 +31,13 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
 [int x = AF_INET; struct in_addr y; struct sockaddr_in z;
 if (&x && &y && &z) return 0;],
       gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
-  AC_MSG_RESULT($gl_cv_socket_ipv4)
+  AC_MSG_RESULT([$gl_cv_socket_ipv4])
  if test $gl_cv_socket_ipv4 = yes; then
-    AC_DEFINE(HAVE_IPV4, 1, [Define to 1 if <sys/socket.h> defines AF_INET.])
+    AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
  fi
-  AC_MSG_CHECKING(for IPv6 sockets)
+  AC_MSG_CHECKING([for IPv6 sockets])
-  AC_CACHE_VAL(gl_cv_socket_ipv6,
+  AC_CACHE_VAL([gl_cv_socket_ipv6],
    [AC_TRY_COMPILE([#include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
@@ -51,8 +51,8 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
 [int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
 if (&x && &y && &z) return 0;],
       gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
-  AC_MSG_RESULT($gl_cv_socket_ipv6)
+  AC_MSG_RESULT([$gl_cv_socket_ipv6])
  if test $gl_cv_socket_ipv6 = yes; then
-    AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if <sys/socket.h> defines AF_INET6.])
+    AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
  fi
 ])
diff --git a/gl/m4/stdbool.m4 b/gl/m4/stdbool.m4
index 2204ecd9..57c804a8 100644
--- a/gl/m4/stdbool.m4
+++ b/gl/m4/stdbool.m4
@@ -1,6 +1,6 @@
 # Check for stdbool.h that conforms to C99.
-dnl Copyright (C) 2002-2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2006, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -111,5 +111,5 @@ AC_DEFUN([AC_HEADER_STDBOOL],
        [ac_cv_header_stdbool_h=no])])
   AC_CHECK_TYPES([_Bool])
   if test $ac_cv_header_stdbool_h = yes; then
-     AC_DEFINE(HAVE_STDBOOL_H, 1, [Define to 1 if stdbool.h conforms to C99.])
+     AC_DEFINE([HAVE_STDBOOL_H], [1], [Define to 1 if stdbool.h conforms to C99.])
   fi])
diff --git a/gl/m4/stdint.m4 b/gl/m4/stdint.m4
index bb6c34fe..b4194c8a 100644
--- a/gl/m4/stdint.m4
+++ b/gl/m4/stdint.m4
@@ -1,5 +1,5 @@
-# stdint.m4 serial 29
+# stdint.m4 serial 33
-dnl Copyright (C) 2001-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2001-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,7 +9,7 @@ dnl Test whether <stdint.h> is supported or must be substituted.
 AC_DEFUN([gl_STDINT_H],
 [
-  AC_PREREQ(2.59)dnl
+  AC_PREREQ([2.59])dnl
  dnl Check for long long int and unsigned long long int.
  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
@@ -229,7 +229,7 @@ struct s {
    gl_STDINT_TYPE_PROPERTIES
    STDINT_H=stdint.h
  fi
-  AC_SUBST(STDINT_H)
+  AC_SUBST([STDINT_H])
 ])
 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
@@ -240,7 +240,7 @@ AC_DEFUN([gl_STDINT_BITSIZEOF],
  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
  dnl   config.h.in,
  dnl - extra AC_SUBST calls, so that the right substitutions are made.
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
       [Define to the number of bits in type ']gltype['.])])
  for gltype in $1 ; do
@@ -265,7 +265,7 @@ AC_DEFUN([gl_STDINT_BITSIZEOF],
    AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
    eval BITSIZEOF_${GLTYPE}=\$result
  done
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
 ])
@@ -278,7 +278,7 @@ AC_DEFUN([gl_CHECK_TYPES_SIGNED],
  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
  dnl   config.h.in,
  dnl - extra AC_SUBST calls, so that the right substitutions are made.
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
       [Define to 1 if ']gltype[' is a signed integer type.])])
  for gltype in $1 ; do
@@ -292,13 +292,13 @@ AC_DEFUN([gl_CHECK_TYPES_SIGNED],
    eval result=\$gl_cv_type_${gltype}_signed
    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
    if test "$result" = yes; then
-      AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
+      AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
      eval HAVE_SIGNED_${GLTYPE}=1
    else
      eval HAVE_SIGNED_${GLTYPE}=0
    fi
  done
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
 ])
@@ -311,7 +311,7 @@ AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
  dnl   config.h.in,
  dnl - extra AC_SUBST calls, so that the right substitutions are made.
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
       [Define to l, ll, u, ul, ull, etc., as suitable for
        constants of type ']gltype['.])])
@@ -337,9 +337,9 @@ AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
           ui64)gltype1='unsigned __int64';;
         esac
         AC_COMPILE_IFELSE(
-           [AC_LANG_PROGRAM([$2
+           [AC_LANG_PROGRAM([$2[
              extern $gltype foo;
-              extern $gltype1 foo;])],
+              extern $gltype1 foo;]])],
           [eval gl_cv_type_${gltype}_suffix=\$glsuf])
         eval result=\$gl_cv_type_${gltype}_suffix
         test "$result" != no && break
@@ -348,9 +348,9 @@ AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
    eval result=\$gl_cv_type_${gltype}_suffix
    test "$result" = no && result=
    eval ${GLTYPE}_SUFFIX=\$result
-    AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
+    AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
  done
-  AC_FOREACH([gltype], [$1],
+  m4_foreach_w([gltype], [$1],
    [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
 ])
@@ -373,13 +373,22 @@ dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
 dnl of interest to stdint.in.h.
 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
 [
-  gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
+  AC_REQUIRE([gl_MULTIARCH])
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
+      [gl_STDINT_INCLUDES])
+  fi
+  gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
    [gl_STDINT_INCLUDES])
  gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
    [gl_STDINT_INCLUDES])
  gl_cv_type_ptrdiff_t_signed=yes
  gl_cv_type_size_t_signed=no
-  gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
+      [gl_STDINT_INCLUDES])
+  fi
+  gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
    [gl_STDINT_INCLUDES])
 ])
diff --git a/gl/m4/stdint_h.m4 b/gl/m4/stdint_h.m4
index db9a8ac4..82f0c244 100644
--- a/gl/m4/stdint_h.m4
+++ b/gl/m4/stdint_h.m4
@@ -1,5 +1,5 @@
-# stdint_h.m4 serial 6
+# stdint_h.m4 serial 8
-dnl Copyright (C) 1997-2004, 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 1997-2004, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,15 +11,15 @@ dnl From Paul Eggert.
 AC_DEFUN([gl_AC_HEADER_STDINT_H],
 [
-  AC_CACHE_CHECK([for stdint.h], gl_cv_header_stdint_h,
+  AC_CACHE_CHECK([for stdint.h], [gl_cv_header_stdint_h],
  [AC_TRY_COMPILE(
    [#include <sys/types.h>
 #include <stdint.h>],
    [uintmax_t i = (uintmax_t) -1; return !i;],
-    gl_cv_header_stdint_h=yes,
+    [gl_cv_header_stdint_h=yes],
-    gl_cv_header_stdint_h=no)])
+    [gl_cv_header_stdint_h=no])])
  if test $gl_cv_header_stdint_h = yes; then
-    AC_DEFINE_UNQUOTED(HAVE_STDINT_H_WITH_UINTMAX, 1,
+    AC_DEFINE_UNQUOTED([HAVE_STDINT_H_WITH_UINTMAX], [1],
      [Define if <stdint.h> exists, doesn't clash with <sys/types.h>,
       and declares uintmax_t. ])
  fi
diff --git a/gl/m4/stdio_h.m4 b/gl/m4/stdio_h.m4
index a40d4180..60b4bd79 100644
--- a/gl/m4/stdio_h.m4
+++ b/gl/m4/stdio_h.m4
@@ -1,5 +1,5 @@
-# stdio_h.m4 serial 9
+# stdio_h.m4 serial 14
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,6 +8,28 @@ AC_DEFUN([gl_STDIO_H],
 [
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  gl_CHECK_NEXT_HEADERS([stdio.h])
+  dnl No need to create extra modules for these functions. Everyone who uses
+  dnl <stdio.h> likely needs them.
+  GNULIB_FPRINTF=1
+  GNULIB_PRINTF=1
+  GNULIB_VFPRINTF=1
+  GNULIB_VPRINTF=1
+  GNULIB_FPUTC=1
+  GNULIB_PUTC=1
+  GNULIB_PUTCHAR=1
+  GNULIB_FPUTS=1
+  GNULIB_PUTS=1
+  GNULIB_FWRITE=1
+  dnl This ifdef is just an optimization, to avoid performing a configure
+  dnl check whose result is not used. It does not make the test of
+  dnl GNULIB_STDIO_H_SIGPIPE or GNULIB_SIGPIPE redundant.
+  m4_ifdef([gl_SIGNAL_SIGPIPE], [
+    gl_SIGNAL_SIGPIPE
+    if test $gl_cv_header_signal_h_SIGPIPE != yes; then
+      REPLACE_STDIO_WRITE_FUNCS=1
+      AC_LIBOBJ([stdio-write])
+    fi
+  ])
 ])
 AC_DEFUN([gl_STDIO_MODULE_INDICATOR],
@@ -19,49 +41,69 @@ AC_DEFUN([gl_STDIO_MODULE_INDICATOR],
 AC_DEFUN([gl_STDIO_H_DEFAULTS],
 [
-  GNULIB_FPRINTF_POSIX=0;  AC_SUBST([GNULIB_FPRINTF_POSIX])
+  GNULIB_FPRINTF=0;              AC_SUBST([GNULIB_FPRINTF])
-  GNULIB_PRINTF_POSIX=0;   AC_SUBST([GNULIB_PRINTF_POSIX])
+  GNULIB_FPRINTF_POSIX=0;        AC_SUBST([GNULIB_FPRINTF_POSIX])
-  GNULIB_SNPRINTF=0;       AC_SUBST([GNULIB_SNPRINTF])
+  GNULIB_PRINTF=0;               AC_SUBST([GNULIB_PRINTF])
-  GNULIB_SPRINTF_POSIX=0;  AC_SUBST([GNULIB_SPRINTF_POSIX])
+  GNULIB_PRINTF_POSIX=0;         AC_SUBST([GNULIB_PRINTF_POSIX])
-  GNULIB_VFPRINTF_POSIX=0; AC_SUBST([GNULIB_VFPRINTF_POSIX])
+  GNULIB_SNPRINTF=0;             AC_SUBST([GNULIB_SNPRINTF])
-  GNULIB_VPRINTF_POSIX=0;  AC_SUBST([GNULIB_VPRINTF_POSIX])
+  GNULIB_SPRINTF_POSIX=0;        AC_SUBST([GNULIB_SPRINTF_POSIX])
-  GNULIB_VSNPRINTF=0;      AC_SUBST([GNULIB_VSNPRINTF])
+  GNULIB_VFPRINTF=0;             AC_SUBST([GNULIB_VFPRINTF])
-  GNULIB_VSPRINTF_POSIX=0; AC_SUBST([GNULIB_VSPRINTF_POSIX])
+  GNULIB_VFPRINTF_POSIX=0;       AC_SUBST([GNULIB_VFPRINTF_POSIX])
-  GNULIB_VASPRINTF=0;      AC_SUBST([GNULIB_VASPRINTF])
+  GNULIB_VPRINTF=0;              AC_SUBST([GNULIB_VPRINTF])
-  GNULIB_FOPEN=0;          AC_SUBST([GNULIB_FOPEN])
+  GNULIB_VPRINTF_POSIX=0;        AC_SUBST([GNULIB_VPRINTF_POSIX])
-  GNULIB_FREOPEN=0;        AC_SUBST([GNULIB_FREOPEN])
+  GNULIB_VSNPRINTF=0;            AC_SUBST([GNULIB_VSNPRINTF])
-  GNULIB_FSEEK=0;          AC_SUBST([GNULIB_FSEEK])
+  GNULIB_VSPRINTF_POSIX=0;       AC_SUBST([GNULIB_VSPRINTF_POSIX])
-  GNULIB_FSEEKO=0;         AC_SUBST([GNULIB_FSEEKO])
+  GNULIB_VASPRINTF=0;            AC_SUBST([GNULIB_VASPRINTF])
-  GNULIB_FTELL=0;          AC_SUBST([GNULIB_FTELL])
+  GNULIB_OBSTACK_PRINTF=0;       AC_SUBST([GNULIB_OBSTACK_PRINTF])
-  GNULIB_FTELLO=0;         AC_SUBST([GNULIB_FTELLO])
+  GNULIB_OBSTACK_PRINTF_POSIX=0; AC_SUBST([GNULIB_OBSTACK_PRINTF_POSIX])
-  GNULIB_FFLUSH=0;         AC_SUBST([GNULIB_FFLUSH])
+  GNULIB_FOPEN=0;                AC_SUBST([GNULIB_FOPEN])
-  GNULIB_GETDELIM=0;       AC_SUBST([GNULIB_GETDELIM])
+  GNULIB_FREOPEN=0;              AC_SUBST([GNULIB_FREOPEN])
-  GNULIB_GETLINE=0;        AC_SUBST([GNULIB_GETLINE])
+  GNULIB_FSEEK=0;                AC_SUBST([GNULIB_FSEEK])
+  GNULIB_FSEEKO=0;               AC_SUBST([GNULIB_FSEEKO])
+  GNULIB_FTELL=0;                AC_SUBST([GNULIB_FTELL])
+  GNULIB_FTELLO=0;               AC_SUBST([GNULIB_FTELLO])
+  GNULIB_FFLUSH=0;               AC_SUBST([GNULIB_FFLUSH])
+  GNULIB_FCLOSE=0;               AC_SUBST([GNULIB_FCLOSE])
+  GNULIB_FPUTC=0;                AC_SUBST([GNULIB_FPUTC])
+  GNULIB_PUTC=0;                 AC_SUBST([GNULIB_PUTC])
+  GNULIB_PUTCHAR=0;              AC_SUBST([GNULIB_PUTCHAR])
+  GNULIB_FPUTS=0;                AC_SUBST([GNULIB_FPUTS])
+  GNULIB_PUTS=0;                 AC_SUBST([GNULIB_PUTS])
+  GNULIB_FWRITE=0;               AC_SUBST([GNULIB_FWRITE])
+  GNULIB_GETDELIM=0;             AC_SUBST([GNULIB_GETDELIM])
+  GNULIB_GETLINE=0;              AC_SUBST([GNULIB_GETLINE])
+  GNULIB_PERROR=0;               AC_SUBST([GNULIB_PERROR])
+  GNULIB_STDIO_H_SIGPIPE=0;      AC_SUBST([GNULIB_STDIO_H_SIGPIPE])
  dnl Assume proper GNU behavior unless another module says otherwise.
-  REPLACE_FPRINTF=0;       AC_SUBST([REPLACE_FPRINTF])
+  REPLACE_STDIO_WRITE_FUNCS=0;   AC_SUBST([REPLACE_STDIO_WRITE_FUNCS])
-  REPLACE_VFPRINTF=0;      AC_SUBST([REPLACE_VFPRINTF])
+  REPLACE_FPRINTF=0;             AC_SUBST([REPLACE_FPRINTF])
-  REPLACE_PRINTF=0;        AC_SUBST([REPLACE_PRINTF])
+  REPLACE_VFPRINTF=0;            AC_SUBST([REPLACE_VFPRINTF])
-  REPLACE_VPRINTF=0;       AC_SUBST([REPLACE_VPRINTF])
+  REPLACE_PRINTF=0;              AC_SUBST([REPLACE_PRINTF])
-  REPLACE_SNPRINTF=0;      AC_SUBST([REPLACE_SNPRINTF])
+  REPLACE_VPRINTF=0;             AC_SUBST([REPLACE_VPRINTF])
-  HAVE_DECL_SNPRINTF=1;    AC_SUBST([HAVE_DECL_SNPRINTF])
+  REPLACE_SNPRINTF=0;            AC_SUBST([REPLACE_SNPRINTF])
-  REPLACE_VSNPRINTF=0;     AC_SUBST([REPLACE_VSNPRINTF])
+  HAVE_DECL_SNPRINTF=1;          AC_SUBST([HAVE_DECL_SNPRINTF])
-  HAVE_DECL_VSNPRINTF=1;   AC_SUBST([HAVE_DECL_VSNPRINTF])
+  REPLACE_VSNPRINTF=0;           AC_SUBST([REPLACE_VSNPRINTF])
-  REPLACE_SPRINTF=0;       AC_SUBST([REPLACE_SPRINTF])
+  HAVE_DECL_VSNPRINTF=1;         AC_SUBST([HAVE_DECL_VSNPRINTF])
-  REPLACE_VSPRINTF=0;      AC_SUBST([REPLACE_VSPRINTF])
+  REPLACE_SPRINTF=0;             AC_SUBST([REPLACE_SPRINTF])
-  HAVE_VASPRINTF=1;        AC_SUBST([HAVE_VASPRINTF])
+  REPLACE_VSPRINTF=0;            AC_SUBST([REPLACE_VSPRINTF])
-  REPLACE_VASPRINTF=0;     AC_SUBST([REPLACE_VASPRINTF])
+  HAVE_VASPRINTF=1;              AC_SUBST([HAVE_VASPRINTF])
-  REPLACE_FOPEN=0;         AC_SUBST([REPLACE_FOPEN])
+  REPLACE_VASPRINTF=0;           AC_SUBST([REPLACE_VASPRINTF])
-  REPLACE_FREOPEN=0;       AC_SUBST([REPLACE_FREOPEN])
+  HAVE_DECL_OBSTACK_PRINTF=1;    AC_SUBST([HAVE_DECL_OBSTACK_PRINTF])
-  HAVE_FSEEKO=1;           AC_SUBST([HAVE_FSEEKO])
+  REPLACE_OBSTACK_PRINTF=0;      AC_SUBST([REPLACE_OBSTACK_PRINTF])
-  REPLACE_FSEEKO=0;        AC_SUBST([REPLACE_FSEEKO])
+  REPLACE_FOPEN=0;               AC_SUBST([REPLACE_FOPEN])
-  REPLACE_FSEEK=0;         AC_SUBST([REPLACE_FSEEK])
+  REPLACE_FREOPEN=0;             AC_SUBST([REPLACE_FREOPEN])
-  HAVE_FTELLO=1;           AC_SUBST([HAVE_FTELLO])
+  HAVE_FSEEKO=1;                 AC_SUBST([HAVE_FSEEKO])
-  REPLACE_FTELLO=0;        AC_SUBST([REPLACE_FTELLO])
+  REPLACE_FSEEKO=0;              AC_SUBST([REPLACE_FSEEKO])
-  REPLACE_FTELL=0;         AC_SUBST([REPLACE_FTELL])
+  REPLACE_FSEEK=0;               AC_SUBST([REPLACE_FSEEK])
-  REPLACE_FFLUSH=0;        AC_SUBST([REPLACE_FFLUSH])
+  HAVE_FTELLO=1;                 AC_SUBST([HAVE_FTELLO])
-  HAVE_DECL_GETDELIM=1;    AC_SUBST([HAVE_DECL_GETDELIM])
+  REPLACE_FTELLO=0;              AC_SUBST([REPLACE_FTELLO])
-  HAVE_DECL_GETLINE=1;     AC_SUBST([HAVE_DECL_GETLINE])
+  REPLACE_FTELL=0;               AC_SUBST([REPLACE_FTELL])
-  REPLACE_GETLINE=0;       AC_SUBST([REPLACE_GETLINE])
+  REPLACE_FFLUSH=0;              AC_SUBST([REPLACE_FFLUSH])
+  REPLACE_FCLOSE=0;              AC_SUBST([REPLACE_FCLOSE])
+  HAVE_DECL_GETDELIM=1;          AC_SUBST([HAVE_DECL_GETDELIM])
+  HAVE_DECL_GETLINE=1;           AC_SUBST([HAVE_DECL_GETLINE])
+  REPLACE_GETLINE=0;             AC_SUBST([REPLACE_GETLINE])
+  REPLACE_PERROR=0;              AC_SUBST([REPLACE_PERROR])
 ])
 dnl Code shared by fseeko and ftello.  Determine if large files are supported,
@@ -70,8 +112,8 @@ AC_DEFUN([gl_STDIN_LARGE_OFFSET],
  [
    AC_CACHE_CHECK([whether stdin defaults to large file offsets],
      [gl_cv_var_stdin_large_offset],
-      [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>],
+      [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]],
-[#if defined __SL64 && defined __SCLE /* cygwin */
+[[#if defined __SL64 && defined __SCLE /* cygwin */
  /* Cygwin 1.5.24 and earlier fail to put stdin in 64-bit mode, making
     fseeko/ftello needlessly fail.  This bug was fixed in 1.5.25, and
     it is easier to do a version check than building a runtime test.  */
@@ -79,7 +121,7 @@ AC_DEFUN([gl_STDIN_LARGE_OFFSET],
 # if CYGWIN_VERSION_DLL_COMBINED < CYGWIN_VERSION_DLL_MAKE_COMBINED (1005, 25)
  choke me
 # endif
-#endif])],
+#endif]])],
        [gl_cv_var_stdin_large_offset=yes],
        [gl_cv_var_stdin_large_offset=no])])
 ])
diff --git a/gl/m4/stdlib_h.m4 b/gl/m4/stdlib_h.m4
index fe4ce122..582db13d 100644
--- a/gl/m4/stdlib_h.m4
+++ b/gl/m4/stdlib_h.m4
@@ -1,5 +1,5 @@
-# stdlib_h.m4 serial 5
+# stdlib_h.m4 serial 13
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2007, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,6 +8,9 @@ AC_DEFUN([gl_STDLIB_H],
 [
  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
  gl_CHECK_NEXT_HEADERS([stdlib.h])
+  AC_CHECK_TYPES([struct random_data],
+    [], [HAVE_STRUCT_RANDOM_DATA=0],
+    [[#include <stdlib.h>]])
 ])
 AC_DEFUN([gl_STDLIB_MODULE_INDICATOR],
@@ -22,21 +25,38 @@ AC_DEFUN([gl_STDLIB_H_DEFAULTS],
  GNULIB_MALLOC_POSIX=0;  AC_SUBST([GNULIB_MALLOC_POSIX])
  GNULIB_REALLOC_POSIX=0; AC_SUBST([GNULIB_REALLOC_POSIX])
  GNULIB_CALLOC_POSIX=0;  AC_SUBST([GNULIB_CALLOC_POSIX])
+  GNULIB_ATOLL=0;         AC_SUBST([GNULIB_ATOLL])
+  GNULIB_GETLOADAVG=0;    AC_SUBST([GNULIB_GETLOADAVG])
  GNULIB_GETSUBOPT=0;     AC_SUBST([GNULIB_GETSUBOPT])
  GNULIB_MKDTEMP=0;       AC_SUBST([GNULIB_MKDTEMP])
  GNULIB_MKSTEMP=0;       AC_SUBST([GNULIB_MKSTEMP])
  GNULIB_PUTENV=0;        AC_SUBST([GNULIB_PUTENV])
+  GNULIB_RANDOM_R=0;      AC_SUBST([GNULIB_RANDOM_R])
+  GNULIB_RPMATCH=0;       AC_SUBST([GNULIB_RPMATCH])
  GNULIB_SETENV=0;        AC_SUBST([GNULIB_SETENV])
+  GNULIB_STRTOD=0;        AC_SUBST([GNULIB_STRTOD])
+  GNULIB_STRTOLL=0;       AC_SUBST([GNULIB_STRTOLL])
+  GNULIB_STRTOULL=0;      AC_SUBST([GNULIB_STRTOULL])
  GNULIB_UNSETENV=0;      AC_SUBST([GNULIB_UNSETENV])
  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_CALLOC_POSIX=1;    AC_SUBST([HAVE_CALLOC_POSIX])
+  HAVE_ATOLL=1;              AC_SUBST([HAVE_ATOLL])
-  HAVE_GETSUBOPT=1;       AC_SUBST([HAVE_GETSUBOPT])
+  HAVE_CALLOC_POSIX=1;       AC_SUBST([HAVE_CALLOC_POSIX])
-  HAVE_MALLOC_POSIX=1;    AC_SUBST([HAVE_MALLOC_POSIX])
+  HAVE_GETSUBOPT=1;          AC_SUBST([HAVE_GETSUBOPT])
-  HAVE_MKDTEMP=1;         AC_SUBST([HAVE_MKDTEMP])
+  HAVE_MALLOC_POSIX=1;       AC_SUBST([HAVE_MALLOC_POSIX])
-  HAVE_REALLOC_POSIX=1;   AC_SUBST([HAVE_REALLOC_POSIX])
+  HAVE_MKDTEMP=1;            AC_SUBST([HAVE_MKDTEMP])
-  HAVE_SETENV=1;          AC_SUBST([HAVE_SETENV])
+  HAVE_REALLOC_POSIX=1;      AC_SUBST([HAVE_REALLOC_POSIX])
-  HAVE_UNSETENV=1;        AC_SUBST([HAVE_UNSETENV])
+  HAVE_RANDOM_R=1;           AC_SUBST([HAVE_RANDOM_R])
-  REPLACE_MKSTEMP=0;      AC_SUBST([REPLACE_MKSTEMP])
+  HAVE_RPMATCH=1;            AC_SUBST([HAVE_RPMATCH])
-  REPLACE_PUTENV=0;       AC_SUBST([REPLACE_PUTENV])
+  HAVE_SETENV=1;             AC_SUBST([HAVE_SETENV])
-  VOID_UNSETENV=0;        AC_SUBST([VOID_UNSETENV])
+  HAVE_STRTOD=1;             AC_SUBST([HAVE_STRTOD])
+  HAVE_STRTOLL=1;            AC_SUBST([HAVE_STRTOLL])
+  HAVE_STRTOULL=1;           AC_SUBST([HAVE_STRTOULL])
+  HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA])
+  HAVE_SYS_LOADAVG_H=0;      AC_SUBST([HAVE_SYS_LOADAVG_H])
+  HAVE_UNSETENV=1;           AC_SUBST([HAVE_UNSETENV])
+  HAVE_DECL_GETLOADAVG=1;    AC_SUBST([HAVE_DECL_GETLOADAVG])
+  REPLACE_MKSTEMP=0;         AC_SUBST([REPLACE_MKSTEMP])
+  REPLACE_PUTENV=0;          AC_SUBST([REPLACE_PUTENV])
+  REPLACE_STRTOD=0;          AC_SUBST([REPLACE_STRTOD])
+  VOID_UNSETENV=0;           AC_SUBST([VOID_UNSETENV])
 ])
diff --git a/gl/m4/strdup.m4 b/gl/m4/strdup.m4
deleted file mode 100644
index 8796e9e0..00000000
--- a/gl/m4/strdup.m4
+++ /dev/null
@@ -1,22 +0,0 @@
-# strdup.m4 serial 9
-dnl Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software
-dnl Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-AC_DEFUN([gl_FUNC_STRDUP],
-[
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  AC_REPLACE_FUNCS(strdup)
-  AC_CHECK_DECLS_ONCE(strdup)
-  if test $ac_cv_have_decl_strdup = no; then
-    HAVE_DECL_STRDUP=0
-  fi
-  gl_PREREQ_STRDUP
-])
-# Prerequisites of lib/strdup.c.
-AC_DEFUN([gl_PREREQ_STRDUP], [:])
diff --git a/gl/m4/strerror.m4 b/gl/m4/strerror.m4
index eb7d45aa..8c16ca9a 100644
--- a/gl/m4/strerror.m4
+++ b/gl/m4/strerror.m4
@@ -1,5 +1,5 @@
-# strerror.m4 serial 7
+# strerror.m4 serial 9
-dnl Copyright (C) 2002, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002, 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -7,7 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_STRERROR],
 [
  AC_REQUIRE([gl_FUNC_STRERROR_SEPARATE])
-  if test $gl_cv_func_working_strerror = no; then
+  if test $REPLACE_STRERROR = 1; then
    AC_LIBOBJ([strerror])
    AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR],
      [Define this to 1 if strerror is broken.])
@@ -18,25 +18,38 @@ AC_DEFUN([gl_FUNC_STRERROR],
 AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
 [
  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  AC_CACHE_CHECK([for working strerror function],
+  AC_REQUIRE([gl_HEADER_ERRNO_H])
-   [gl_cv_func_working_strerror],
+  if test -z "$ERRNO_H"; then
-   [AC_RUN_IFELSE(
+    AC_CACHE_CHECK([for working strerror function],
-      [AC_LANG_PROGRAM(
+     [gl_cv_func_working_strerror],
-         [#include <string.h>
+     [AC_RUN_IFELSE(
-         ],
+        [AC_LANG_PROGRAM(
-         [return !*strerror (-2);])],
+           [[#include <string.h>
-      [gl_cv_func_working_strerror=yes],
+           ]],
-      [gl_cv_func_working_strerror=no],
+           [[return !*strerror (-2);]])],
-      [dnl Assume crossbuild works if it compiles.
+        [gl_cv_func_working_strerror=yes],
-       AC_COMPILE_IFELSE(
+        [gl_cv_func_working_strerror=no],
-         [AC_LANG_PROGRAM(
+        [dnl Assume crossbuild works if it compiles.
-            [#include <string.h>
+         AC_COMPILE_IFELSE(
-            ],
+           [AC_LANG_PROGRAM(
-            [return !*strerror (-2);])],
+              [[#include <string.h>
-         [gl_cv_func_working_strerror=yes],
+              ]],
-         [gl_cv_func_working_strerror=no])])])
+              [[return !*strerror (-2);]])],
-  if test $gl_cv_func_working_strerror = no ; then
+           [gl_cv_func_working_strerror=yes],
+           [gl_cv_func_working_strerror=no])
+      ])
+    ])
+    if test $gl_cv_func_working_strerror = no; then
+      dnl The system's strerror() fails to return a string for out-of-range
+      dnl integers. Replace it.
+      REPLACE_STRERROR=1
+    fi
+  else
+    dnl The system's strerror() cannot know about the new errno values we add
+    dnl to <errno.h>. Replace it.
    REPLACE_STRERROR=1
+  fi
+  if test $REPLACE_STRERROR = 1; then
    gl_PREREQ_STRERROR
  fi
 ])
@@ -44,4 +57,12 @@ AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
 # Prerequisites of lib/strerror.c.
 AC_DEFUN([gl_PREREQ_STRERROR], [
  AC_CHECK_DECLS([strerror])
+  AC_CHECK_HEADERS_ONCE([sys/socket.h])
+  if test $ac_cv_header_sys_socket_h != yes; then
+    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
+    dnl the check for those headers unconditional; yet cygwin reports
+    dnl that the headers are present but cannot be compiled (since on
+    dnl cygwin, all socket information should come from sys/socket.h).
+    AC_CHECK_HEADERS([winsock2.h])
+  fi
 ])
diff --git a/gl/m4/string_h.m4 b/gl/m4/string_h.m4
index 766d7e98..2d5553c3 100644
--- a/gl/m4/string_h.m4
+++ b/gl/m4/string_h.m4
@@ -5,7 +5,7 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
-# serial 4
+# serial 6
 # Written by Paul Eggert.
@@ -35,6 +35,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
  GNULIB_MEMMEM=0;      AC_SUBST([GNULIB_MEMMEM])
  GNULIB_MEMPCPY=0;     AC_SUBST([GNULIB_MEMPCPY])
  GNULIB_MEMRCHR=0;     AC_SUBST([GNULIB_MEMRCHR])
+  GNULIB_RAWMEMCHR=0;   AC_SUBST([GNULIB_RAWMEMCHR])
  GNULIB_STPCPY=0;      AC_SUBST([GNULIB_STPCPY])
  GNULIB_STPNCPY=0;     AC_SUBST([GNULIB_STPNCPY])
  GNULIB_STRCHRNUL=0;   AC_SUBST([GNULIB_STRCHRNUL])
@@ -62,10 +63,12 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
  GNULIB_MBSTOK_R=0;    AC_SUBST([GNULIB_MBSTOK_R])
  GNULIB_STRERROR=0;    AC_SUBST([GNULIB_STRERROR])
  GNULIB_STRSIGNAL=0;   AC_SUBST([GNULIB_STRSIGNAL])
+  GNULIB_STRVERSCMP=0;   AC_SUBST([GNULIB_STRVERSCMP])
  dnl Assume proper GNU behavior unless another module says otherwise.
  HAVE_DECL_MEMMEM=1;           AC_SUBST([HAVE_DECL_MEMMEM])
  HAVE_MEMPCPY=1;               AC_SUBST([HAVE_MEMPCPY])
  HAVE_DECL_MEMRCHR=1;          AC_SUBST([HAVE_DECL_MEMRCHR])
+  HAVE_RAWMEMCHR=1;             AC_SUBST([HAVE_RAWMEMCHR])
  HAVE_STPCPY=1;                AC_SUBST([HAVE_STPCPY])
  HAVE_STPNCPY=1;               AC_SUBST([HAVE_STPNCPY])
  HAVE_STRCHRNUL=1;             AC_SUBST([HAVE_STRCHRNUL])
@@ -79,9 +82,11 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
  HAVE_DECL_STRTOK_R=1;         AC_SUBST([HAVE_DECL_STRTOK_R])
  HAVE_DECL_STRERROR=1;         AC_SUBST([HAVE_DECL_STRERROR])
  HAVE_DECL_STRSIGNAL=1;        AC_SUBST([HAVE_DECL_STRSIGNAL])
-  REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
+  HAVE_STRVERSCMP=1;            AC_SUBST([HAVE_STRVERSCMP])
-  REPLACE_STRSIGNAL=0;          AC_SUBST([REPLACE_STRSIGNAL])
  REPLACE_MEMMEM=0;             AC_SUBST([REPLACE_MEMMEM])
-  REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
+  REPLACE_STRDUP=0;             AC_SUBST([REPLACE_STRDUP])
  REPLACE_STRSTR=0;             AC_SUBST([REPLACE_STRSTR])
+  REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
+  REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
+  REPLACE_STRSIGNAL=0;          AC_SUBST([REPLACE_STRSIGNAL])
 ])
diff --git a/gl/m4/strndup.m4 b/gl/m4/strndup.m4
index f7934ef8..4fa7d5a7 100644
--- a/gl/m4/strndup.m4
+++ b/gl/m4/strndup.m4
@@ -1,5 +1,5 @@
-# strndup.m4 serial 14
+# strndup.m4 serial 16
-dnl Copyright (C) 2002-2003, 2005-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -16,10 +16,10 @@ AC_DEFUN([gl_FUNC_STRNDUP],
  fi
  # AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'.
-  AC_CACHE_CHECK([for working strndup], gl_cv_func_strndup,
+  AC_CACHE_CHECK([for working strndup], [gl_cv_func_strndup],
    [AC_RUN_IFELSE([
-       AC_LANG_PROGRAM([#include <string.h>
+       AC_LANG_PROGRAM([[#include <string.h>
-                        #include <stdlib.h>], [[
+                         #include <stdlib.h>]], [[
 #ifndef HAVE_DECL_STRNDUP
  extern char *strndup (const char *, size_t);
 #endif
@@ -40,7 +40,7 @@ AC_DEFUN([gl_FUNC_STRNDUP],
             [gl_cv_func_strndup=yes])],
          [gl_cv_func_strndup=no])])])
  if test $gl_cv_func_strndup = yes; then
-    AC_DEFINE([HAVE_STRNDUP], 1,
+    AC_DEFINE([HAVE_STRNDUP], [1],
      [Define if you have the strndup() function and it works.])
  else
    HAVE_STRNDUP=0
diff --git a/gl/m4/strnlen.m4 b/gl/m4/strnlen.m4
index d8307eda..1c97859d 100644
--- a/gl/m4/strnlen.m4
+++ b/gl/m4/strnlen.m4
@@ -1,5 +1,5 @@
-# strnlen.m4 serial 9
+# strnlen.m4 serial 10
-dnl Copyright (C) 2002-2003, 2005-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -20,8 +20,8 @@ AC_DEFUN([gl_FUNC_STRNLEN],
    # This is necessary because automake-1.6.1 doesn't understand
    # that the above use of AC_FUNC_STRNLEN means we may have to use
    # lib/strnlen.c.
-    #AC_LIBOBJ(strnlen)
+    #AC_LIBOBJ([strnlen])
-    AC_DEFINE(strnlen, rpl_strnlen,
+    AC_DEFINE([strnlen], [rpl_strnlen],
      [Define to rpl_strnlen if the replacement function should be used.])
    gl_PREREQ_STRNLEN
  fi
diff --git a/gl/m4/sys_socket_h.m4 b/gl/m4/sys_socket_h.m4
index d9659c2d..85a0ace8 100644
--- a/gl/m4/sys_socket_h.m4
+++ b/gl/m4/sys_socket_h.m4
@@ -1,5 +1,5 @@
-# sys_socket_h.m4 serial 4
+# sys_socket_h.m4 serial 12
-dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2005-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,22 +8,43 @@ dnl From Simon Josefsson.
 AC_DEFUN([gl_HEADER_SYS_SOCKET],
 [
+  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
+  AC_REQUIRE([AC_C_INLINE])
  AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
    [gl_cv_header_sys_socket_h_selfcontained],
    [
-      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/socket.h>], [])],
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
        [gl_cv_header_sys_socket_h_selfcontained=yes],
        [gl_cv_header_sys_socket_h_selfcontained=no])
    ])
  if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
    SYS_SOCKET_H=''
+    dnl If the shutdown function exists, <sys/socket.h> should define
+    dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
+    AC_CHECK_FUNCS([shutdown])
+    if test $ac_cv_func_shutdown = yes; then
+      AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
+        [gl_cv_header_sys_socket_h_shut],
+        [
+          AC_COMPILE_IFELSE(
+            [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
+               [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
+            [gl_cv_header_sys_socket_h_shut=yes],
+            [gl_cv_header_sys_socket_h_shut=no])
+        ])
+      if test $gl_cv_header_sys_socket_h_shut = no; then
+        SYS_SOCKET_H='sys/socket.h'
+      fi
+    fi
  else
    SYS_SOCKET_H='sys/socket.h'
+  fi
+  if test -n "$SYS_SOCKET_H"; then
+    dnl Check prerequisites of the <sys/socket.h> replacement.
    gl_CHECK_NEXT_HEADERS([sys/socket.h])
    if test $ac_cv_header_sys_socket_h = yes; then
      HAVE_SYS_SOCKET_H=1
-      HAVE_WINSOCK2_H=0
      HAVE_WS2TCPIP_H=0
    else
      HAVE_SYS_SOCKET_H=0
@@ -31,21 +52,66 @@ AC_DEFUN([gl_HEADER_SYS_SOCKET],
      dnl the check for those headers unconditional; yet cygwin reports
      dnl that the headers are present but cannot be compiled (since on
      dnl cygwin, all socket information should come from sys/socket.h).
-      AC_CHECK_HEADERS([winsock2.h ws2tcpip.h])
+      AC_CHECK_HEADERS([ws2tcpip.h])
-      if test $ac_cv_header_winsock2_h = yes; then
-        HAVE_WINSOCK2_H=1
-      else
-        HAVE_WINSOCK2_H=0
-      fi
      if test $ac_cv_header_ws2tcpip_h = yes; then
        HAVE_WS2TCPIP_H=1
      else
        HAVE_WS2TCPIP_H=0
      fi
    fi
+    gl_PREREQ_SYS_H_WINSOCK2
    AC_SUBST([HAVE_SYS_SOCKET_H])
-    AC_SUBST([HAVE_WINSOCK2_H])
    AC_SUBST([HAVE_WS2TCPIP_H])
  fi
  AC_SUBST([SYS_SOCKET_H])
 ])
+# Common prerequisites of of the <sys/socket.h> replacement and of the
+# <sys/select.h> replacement.
+# Sets and substitutes HAVE_WINSOCK2_H.
+AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
+[
+  m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
+  m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
+  AC_CHECK_HEADERS_ONCE([sys/socket.h])
+  if test $ac_cv_header_sys_socket_h != yes; then
+    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
+    dnl the check for those headers unconditional; yet cygwin reports
+    dnl that the headers are present but cannot be compiled (since on
+    dnl cygwin, all socket information should come from sys/socket.h).
+    AC_CHECK_HEADERS([winsock2.h])
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+  AC_SUBST([HAVE_WINSOCK2_H])
+])
+AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
+[
+  GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
+  GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
+  GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
+  GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
+  GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
+  GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
+  GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
+  GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
+  GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
+  GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
+  GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
+  GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
+  GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
+  GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
+])
diff --git a/gl/m4/threadlib.m4 b/gl/m4/threadlib.m4
new file mode 100644
index 00000000..3dd38aa8
--- /dev/null
+++ b/gl/m4/threadlib.m4
@@ -0,0 +1,313 @@
+# threadlib.m4 serial 3 (gettext-0.18)
+dnl Copyright (C) 2005-2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl From Bruno Haible.
+dnl gl_THREADLIB
+dnl ------------
+dnl Tests for a multithreading library to be used.
+dnl Defines at most one of the macros USE_POSIX_THREADS, USE_SOLARIS_THREADS,
+dnl USE_PTH_THREADS, USE_WIN32_THREADS
+dnl Sets the variables LIBTHREAD and LTLIBTHREAD to the linker options for use
+dnl in a Makefile (LIBTHREAD for use without libtool, LTLIBTHREAD for use with
+dnl libtool).
+dnl Sets the variables LIBMULTITHREAD and LTLIBMULTITHREAD similarly, for
+dnl programs that really need multithread functionality. The difference
+dnl between LIBTHREAD and LIBMULTITHREAD is that on platforms supporting weak
+dnl symbols, typically LIBTHREAD="" whereas LIBMULTITHREAD="-lpthread".
+dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
+dnl multithread-safe programs.
+AC_DEFUN([gl_THREADLIB_EARLY],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY_BODY])
+])
+dnl The guts of gl_THREADLIB_EARLY. Needs to be expanded only once.
+AC_DEFUN([gl_THREADLIB_EARLY_BODY],
+[
+  dnl Ordering constraints: This macro modifies CPPFLAGS in a way that
+  dnl influences the result of the autoconf tests that test for *_unlocked
+  dnl declarations, on AIX 5 at least. Therefore it must come early.
+  AC_BEFORE([$0], [gl_FUNC_GLIBC_UNLOCKED_IO])dnl
+  AC_BEFORE([$0], [gl_ARGP])dnl
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  dnl _GNU_SOURCE is needed for pthread_rwlock_t on glibc systems.
+  dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
+  dnl AC_GNU_SOURCE.
+  m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
+    [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
+    [AC_REQUIRE([AC_GNU_SOURCE])])
+  dnl Check for multithreading.
+  m4_divert_text([DEFAULTS], [gl_use_threads_default=])
+  AC_ARG_ENABLE([threads],
+AC_HELP_STRING([--enable-threads={posix|solaris|pth|win32}], [specify multithreading API])
+AC_HELP_STRING([--disable-threads], [build without multithread safety]),
+    [gl_use_threads=$enableval],
+    [if test -n "$gl_use_threads_default"; then
+       gl_use_threads="$gl_use_threads_default"
+     else
+       case "$host_os" in
+         dnl Disable multithreading by default on OSF/1, because it interferes
+         dnl with fork()/exec(): When msgexec is linked with -lpthread, its
+         dnl child process gets an endless segmentation fault inside execvp().
+         osf*) gl_use_threads=no ;;
+         *)    gl_use_threads=yes ;;
+       esac
+     fi
+    ])
+  if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
+    # For using <pthread.h>:
+    case "$host_os" in
+      osf*)
+        # On OSF/1, the compiler needs the flag -D_REENTRANT so that it
+        # groks <pthread.h>. cc also understands the flag -pthread, but
+        # we don't use it because 1. gcc-2.95 doesn't understand -pthread,
+        # 2. putting a flag into CPPFLAGS that has an effect on the linker
+        # causes the AC_TRY_LINK test below to succeed unexpectedly,
+        # leading to wrong values of LIBTHREAD and LTLIBTHREAD.
+        CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+        ;;
+    esac
+    # Some systems optimize for single-threaded programs by default, and
+    # need special flags to disable these optimizations. For example, the
+    # definition of 'errno' in <errno.h>.
+    case "$host_os" in
+      aix* | freebsd*) CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE" ;;
+      solaris*) CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;;
+    esac
+  fi
+])
+dnl The guts of gl_THREADLIB. Needs to be expanded only once.
+AC_DEFUN([gl_THREADLIB_BODY],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY_BODY])
+  gl_threads_api=none
+  LIBTHREAD=
+  LTLIBTHREAD=
+  LIBMULTITHREAD=
+  LTLIBMULTITHREAD=
+  if test "$gl_use_threads" != no; then
+    dnl Check whether the compiler and linker support weak declarations.
+    AC_MSG_CHECKING([whether imported symbols can be declared weak])
+    gl_have_weak=no
+    AC_TRY_LINK([extern void xyzzy ();
+#pragma weak xyzzy], [xyzzy();], [gl_have_weak=yes])
+    AC_MSG_RESULT([$gl_have_weak])
+    if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
+      # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
+      # it groks <pthread.h>. It's added above, in gl_THREADLIB_EARLY_BODY.
+      AC_CHECK_HEADER([pthread.h],
+        [gl_have_pthread_h=yes], [gl_have_pthread_h=no])
+      if test "$gl_have_pthread_h" = yes; then
+        # Other possible tests:
+        #   -lpthreads (FSU threads, PCthreads)
+        #   -lgthreads
+        gl_have_pthread=
+        # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
+        # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
+        # the second one only in libpthread, and lock.c needs it.
+        AC_TRY_LINK([#include <pthread.h>],
+          [pthread_mutex_lock((pthread_mutex_t*)0);
+           pthread_mutexattr_init((pthread_mutexattr_t*)0);],
+          [gl_have_pthread=yes])
+        # Test for libpthread by looking for pthread_kill. (Not pthread_self,
+        # since it is defined as a macro on OSF/1.)
+        if test -n "$gl_have_pthread"; then
+          # The program links fine without libpthread. But it may actually
+          # need to link with libpthread in order to create multiple threads.
+          AC_CHECK_LIB([pthread], [pthread_kill],
+            [LIBMULTITHREAD=-lpthread LTLIBMULTITHREAD=-lpthread
+             # On Solaris and HP-UX, most pthread functions exist also in libc.
+             # Therefore pthread_in_use() needs to actually try to create a
+             # thread: pthread_create from libc will fail, whereas
+             # pthread_create will actually create a thread.
+             case "$host_os" in
+               solaris* | hpux*)
+                 AC_DEFINE([PTHREAD_IN_USE_DETECTION_HARD], [1],
+                   [Define if the pthread_in_use() detection is hard.])
+             esac
+            ])
+        else
+          # Some library is needed. Try libpthread and libc_r.
+          AC_CHECK_LIB([pthread], [pthread_kill],
+            [gl_have_pthread=yes
+             LIBTHREAD=-lpthread LTLIBTHREAD=-lpthread
+             LIBMULTITHREAD=-lpthread LTLIBMULTITHREAD=-lpthread])
+          if test -z "$gl_have_pthread"; then
+            # For FreeBSD 4.
+            AC_CHECK_LIB([c_r], [pthread_kill],
+              [gl_have_pthread=yes
+               LIBTHREAD=-lc_r LTLIBTHREAD=-lc_r
+               LIBMULTITHREAD=-lc_r LTLIBMULTITHREAD=-lc_r])
+          fi
+        fi
+        if test -n "$gl_have_pthread"; then
+          gl_threads_api=posix
+          AC_DEFINE([USE_POSIX_THREADS], [1],
+            [Define if the POSIX multithreading library can be used.])
+          if test -n "$LIBMULTITHREAD" || test -n "$LTLIBMULTITHREAD"; then
+            if test $gl_have_weak = yes; then
+              AC_DEFINE([USE_POSIX_THREADS_WEAK], [1],
+                [Define if references to the POSIX multithreading library should be made weak.])
+              LIBTHREAD=
+              LTLIBTHREAD=
+            fi
+          fi
+        fi
+      fi
+    fi
+    if test -z "$gl_have_pthread"; then
+      if test "$gl_use_threads" = yes || test "$gl_use_threads" = solaris; then
+        gl_have_solaristhread=
+        gl_save_LIBS="$LIBS"
+        LIBS="$LIBS -lthread"
+        AC_TRY_LINK([#include <thread.h>
+#include <synch.h>],
+          [thr_self();],
+          [gl_have_solaristhread=yes])
+        LIBS="$gl_save_LIBS"
+        if test -n "$gl_have_solaristhread"; then
+          gl_threads_api=solaris
+          LIBTHREAD=-lthread
+          LTLIBTHREAD=-lthread
+          LIBMULTITHREAD="$LIBTHREAD"
+          LTLIBMULTITHREAD="$LTLIBTHREAD"
+          AC_DEFINE([USE_SOLARIS_THREADS], [1],
+            [Define if the old Solaris multithreading library can be used.])
+          if test $gl_have_weak = yes; then
+            AC_DEFINE([USE_SOLARIS_THREADS_WEAK], [1],
+              [Define if references to the old Solaris multithreading library should be made weak.])
+            LIBTHREAD=
+            LTLIBTHREAD=
+          fi
+        fi
+      fi
+    fi
+    if test "$gl_use_threads" = pth; then
+      gl_save_CPPFLAGS="$CPPFLAGS"
+      AC_LIB_LINKFLAGS([pth])
+      gl_have_pth=
+      gl_save_LIBS="$LIBS"
+      LIBS="$LIBS -lpth"
+      AC_TRY_LINK([#include <pth.h>], [pth_self();], [gl_have_pth=yes])
+      LIBS="$gl_save_LIBS"
+      if test -n "$gl_have_pth"; then
+        gl_threads_api=pth
+        LIBTHREAD="$LIBPTH"
+        LTLIBTHREAD="$LTLIBPTH"
+        LIBMULTITHREAD="$LIBTHREAD"
+        LTLIBMULTITHREAD="$LTLIBTHREAD"
+        AC_DEFINE([USE_PTH_THREADS], [1],
+          [Define if the GNU Pth multithreading library can be used.])
+        if test -n "$LIBMULTITHREAD" || test -n "$LTLIBMULTITHREAD"; then
+          if test $gl_have_weak = yes; then
+            AC_DEFINE([USE_PTH_THREADS_WEAK], [1],
+              [Define if references to the GNU Pth multithreading library should be made weak.])
+            LIBTHREAD=
+            LTLIBTHREAD=
+          fi
+        fi
+      else
+        CPPFLAGS="$gl_save_CPPFLAGS"
+      fi
+    fi
+    if test -z "$gl_have_pthread"; then
+      if test "$gl_use_threads" = yes || test "$gl_use_threads" = win32; then
+        if { case "$host_os" in
+               mingw*) true;;
+               *) false;;
+             esac
+           }; then
+          gl_threads_api=win32
+          AC_DEFINE([USE_WIN32_THREADS], [1],
+            [Define if the Win32 multithreading API can be used.])
+        fi
+      fi
+    fi
+  fi
+  AC_MSG_CHECKING([for multithread API to use])
+  AC_MSG_RESULT([$gl_threads_api])
+  AC_SUBST([LIBTHREAD])
+  AC_SUBST([LTLIBTHREAD])
+  AC_SUBST([LIBMULTITHREAD])
+  AC_SUBST([LTLIBMULTITHREAD])
+])
+AC_DEFUN([gl_THREADLIB],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY])
+  AC_REQUIRE([gl_THREADLIB_BODY])
+])
+dnl gl_DISABLE_THREADS
+dnl ------------------
+dnl Sets the gl_THREADLIB default so that threads are not used by default.
+dnl The user can still override it at installation time, by using the
+dnl configure option '--enable-threads'.
+AC_DEFUN([gl_DISABLE_THREADS], [
+  m4_divert_text([INIT_PREPARE], [gl_use_threads_default=no])
+])
+dnl Survey of platforms:
+dnl
+dnl Platform          Available   Compiler    Supports   test-lock
+dnl                   flavours    option      weak       result
+dnl ---------------   ---------   ---------   --------   ---------
+dnl Linux 2.4/glibc   posix       -lpthread       Y      OK
+dnl
+dnl GNU Hurd/glibc    posix
+dnl
+dnl FreeBSD 5.3       posix       -lc_r           Y
+dnl                   posix       -lkse ?         Y
+dnl                   posix       -lpthread ?     Y
+dnl                   posix       -lthr           Y
+dnl
+dnl FreeBSD 5.2       posix       -lc_r           Y
+dnl                   posix       -lkse           Y
+dnl                   posix       -lthr           Y
+dnl
+dnl FreeBSD 4.0,4.10  posix       -lc_r           Y      OK
+dnl
+dnl NetBSD 1.6        --
+dnl
+dnl OpenBSD 3.4       posix       -lpthread       Y      OK
+dnl
+dnl MacOS X 10.[123]  posix       -lpthread       Y      OK
+dnl
+dnl Solaris 7,8,9     posix       -lpthread       Y      Sol 7,8: 0.0; Sol 9: OK
+dnl                   solaris     -lthread        Y      Sol 7,8: 0.0; Sol 9: OK
+dnl
+dnl HP-UX 11          posix       -lpthread       N (cc) OK
+dnl                                               Y (gcc)
+dnl
+dnl IRIX 6.5          posix       -lpthread       Y      0.5
+dnl
+dnl AIX 4.3,5.1       posix       -lpthread       N      AIX 4: 0.5; AIX 5: OK
+dnl
+dnl OSF/1 4.0,5.1     posix       -pthread (cc)   N      OK
+dnl                               -lpthread (gcc) Y
+dnl
+dnl Cygwin            posix       -lpthread       Y      OK
+dnl
+dnl Any of the above  pth         -lpth                  0.0
+dnl
+dnl Mingw             win32                       N      OK
+dnl
+dnl BeOS 5            --
+dnl
+dnl The test-lock result shows what happens if in test-lock.c EXPLICIT_YIELD is
+dnl turned off:
+dnl   OK if all three tests terminate OK,
+dnl   0.5 if the first test terminates OK but the second one loops endlessly,
+dnl   0.0 if the first test already loops endlessly.
diff --git a/gl/m4/uintmax_t.m4 b/gl/m4/uintmax_t.m4
index 641c4898..734b6933 100644
--- a/gl/m4/uintmax_t.m4
+++ b/gl/m4/uintmax_t.m4
@@ -1,12 +1,12 @@
-# uintmax_t.m4 serial 10
+# uintmax_t.m4 serial 12
-dnl Copyright (C) 1997-2004, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 1997-2004, 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl From Paul Eggert.
-AC_PREREQ(2.13)
+AC_PREREQ([2.13])
 # Define uintmax_t to 'unsigned long' or 'unsigned long long'
 # if it is not already defined in <stdint.h> or <inttypes.h>.
@@ -20,11 +20,11 @@ AC_DEFUN([gl_AC_TYPE_UINTMAX_T],
    test $ac_cv_type_unsigned_long_long_int = yes \
      && ac_type='unsigned long long' \
      || ac_type='unsigned long'
-    AC_DEFINE_UNQUOTED(uintmax_t, $ac_type,
+    AC_DEFINE_UNQUOTED([uintmax_t], [$ac_type],
      [Define to unsigned long or unsigned long long
       if <stdint.h> and <inttypes.h> don't define.])
  else
-    AC_DEFINE(HAVE_UINTMAX_T, 1,
+    AC_DEFINE([HAVE_UINTMAX_T], [1],
      [Define if you have the 'uintmax_t' type in <stdint.h> or <inttypes.h>.])
  fi
 ])
diff --git a/gl/m4/unistd_h.m4 b/gl/m4/unistd_h.m4
index 4b8857ca..56852736 100644
--- a/gl/m4/unistd_h.m4
+++ b/gl/m4/unistd_h.m4
@@ -1,5 +1,5 @@
-# unistd_h.m4 serial 10
+# unistd_h.m4 serial 16
-dnl Copyright (C) 2006-2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -32,30 +32,50 @@ AC_DEFUN([gl_UNISTD_MODULE_INDICATOR],
 AC_DEFUN([gl_UNISTD_H_DEFAULTS],
 [
-  GNULIB_CHOWN=0;         AC_SUBST([GNULIB_CHOWN])
+  GNULIB_CHOWN=0;            AC_SUBST([GNULIB_CHOWN])
-  GNULIB_DUP2=0;          AC_SUBST([GNULIB_DUP2])
+  GNULIB_CLOSE=0;            AC_SUBST([GNULIB_CLOSE])
-  GNULIB_FCHDIR=0;        AC_SUBST([GNULIB_FCHDIR])
+  GNULIB_DUP2=0;             AC_SUBST([GNULIB_DUP2])
-  GNULIB_FTRUNCATE=0;     AC_SUBST([GNULIB_FTRUNCATE])
+  GNULIB_ENVIRON=0;          AC_SUBST([GNULIB_ENVIRON])
-  GNULIB_GETCWD=0;        AC_SUBST([GNULIB_GETCWD])
+  GNULIB_EUIDACCESS=0;       AC_SUBST([GNULIB_EUIDACCESS])
-  GNULIB_GETLOGIN_R=0;    AC_SUBST([GNULIB_GETLOGIN_R])
+  GNULIB_FCHDIR=0;           AC_SUBST([GNULIB_FCHDIR])
-  GNULIB_GETPAGESIZE=0;   AC_SUBST([GNULIB_GETPAGESIZE])
+  GNULIB_FSYNC=0;            AC_SUBST([GNULIB_FSYNC])
-  GNULIB_LCHOWN=0;        AC_SUBST([GNULIB_LCHOWN])
+  GNULIB_FTRUNCATE=0;        AC_SUBST([GNULIB_FTRUNCATE])
-  GNULIB_LSEEK=0;         AC_SUBST([GNULIB_LSEEK])
+  GNULIB_GETCWD=0;           AC_SUBST([GNULIB_GETCWD])
-  GNULIB_READLINK=0;      AC_SUBST([GNULIB_READLINK])
+  GNULIB_GETDOMAINNAME=0;    AC_SUBST([GNULIB_GETDOMAINNAME])
-  GNULIB_SLEEP=0;         AC_SUBST([GNULIB_SLEEP])
+  GNULIB_GETDTABLESIZE=0;    AC_SUBST([GNULIB_GETDTABLESIZE])
+  GNULIB_GETHOSTNAME=0;      AC_SUBST([GNULIB_GETHOSTNAME])
+  GNULIB_GETLOGIN_R=0;       AC_SUBST([GNULIB_GETLOGIN_R])
+  GNULIB_GETPAGESIZE=0;      AC_SUBST([GNULIB_GETPAGESIZE])
+  GNULIB_GETUSERSHELL=0;     AC_SUBST([GNULIB_GETUSERSHELL])
+  GNULIB_LCHOWN=0;           AC_SUBST([GNULIB_LCHOWN])
+  GNULIB_LSEEK=0;            AC_SUBST([GNULIB_LSEEK])
+  GNULIB_READLINK=0;         AC_SUBST([GNULIB_READLINK])
+  GNULIB_SLEEP=0;            AC_SUBST([GNULIB_SLEEP])
+  GNULIB_UNISTD_H_SIGPIPE=0; AC_SUBST([GNULIB_UNISTD_H_SIGPIPE])
+  GNULIB_WRITE=0;            AC_SUBST([GNULIB_WRITE])
  dnl Assume proper GNU behavior unless another module says otherwise.
  HAVE_DUP2=1;            AC_SUBST([HAVE_DUP2])
+  HAVE_EUIDACCESS=1;      AC_SUBST([HAVE_EUIDACCESS])
+  HAVE_FSYNC=1;           AC_SUBST([HAVE_FSYNC])
  HAVE_FTRUNCATE=1;       AC_SUBST([HAVE_FTRUNCATE])
+  HAVE_GETDOMAINNAME=1;   AC_SUBST([HAVE_GETDOMAINNAME])
+  HAVE_GETDTABLESIZE=1;   AC_SUBST([HAVE_GETDTABLESIZE])
+  HAVE_GETHOSTNAME=1;     AC_SUBST([HAVE_GETHOSTNAME])
  HAVE_GETPAGESIZE=1;     AC_SUBST([HAVE_GETPAGESIZE])
+  HAVE_GETUSERSHELL=1;    AC_SUBST([HAVE_GETUSERSHELL])
  HAVE_READLINK=1;        AC_SUBST([HAVE_READLINK])
  HAVE_SLEEP=1;           AC_SUBST([HAVE_SLEEP])
+  HAVE_DECL_ENVIRON=1;    AC_SUBST([HAVE_DECL_ENVIRON])
  HAVE_DECL_GETLOGIN_R=1; AC_SUBST([HAVE_DECL_GETLOGIN_R])
  HAVE_OS_H=0;            AC_SUBST([HAVE_OS_H])
  HAVE_SYS_PARAM_H=0;     AC_SUBST([HAVE_SYS_PARAM_H])
  REPLACE_CHOWN=0;        AC_SUBST([REPLACE_CHOWN])
+  REPLACE_CLOSE=0;        AC_SUBST([REPLACE_CLOSE])
  REPLACE_FCHDIR=0;       AC_SUBST([REPLACE_FCHDIR])
  REPLACE_GETCWD=0;       AC_SUBST([REPLACE_GETCWD])
  REPLACE_GETPAGESIZE=0;  AC_SUBST([REPLACE_GETPAGESIZE])
  REPLACE_LCHOWN=0;       AC_SUBST([REPLACE_LCHOWN])
  REPLACE_LSEEK=0;        AC_SUBST([REPLACE_LSEEK])
+  REPLACE_WRITE=0;        AC_SUBST([REPLACE_WRITE])
+  UNISTD_H_HAVE_WINSOCK2_H=0; AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H])
 ])
diff --git a/gl/m4/vasnprintf.m4 b/gl/m4/vasnprintf.m4
index c4d3f4fa..9e839d2b 100644
--- a/gl/m4/vasnprintf.m4
+++ b/gl/m4/vasnprintf.m4
@@ -1,12 +1,11 @@
-# vasnprintf.m4 serial 24
+# vasnprintf.m4 serial 26
-dnl Copyright (C) 2002-2004, 2006-2008 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2004, 2006-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_VASNPRINTF],
 [
-  AC_REQUIRE([gl_EOVERFLOW])
  AC_CHECK_FUNCS_ONCE([vasnprintf])
  if test $ac_cv_func_vasnprintf = no; then
    gl_REPLACE_VASNPRINTF
@@ -21,7 +20,7 @@ AC_DEFUN([gl_REPLACE_VASNPRINTF],
  AC_LIBOBJ([printf-parse])
  AC_LIBOBJ([asnprintf])
  if test $ac_cv_func_vasnprintf = yes; then
-    AC_DEFINE([REPLACE_VASNPRINTF], 1,
+    AC_DEFINE([REPLACE_VASNPRINTF], [1],
      [Define if vasnprintf exists but is overridden by gnulib.])
  fi
  gl_PREREQ_PRINTF_ARGS
@@ -59,7 +58,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF],
  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
  AC_REQUIRE([gt_TYPE_WCHAR_T])
  AC_REQUIRE([gt_TYPE_WINT_T])
-  AC_CHECK_FUNCS(snprintf wcslen)
+  AC_CHECK_FUNCS([snprintf wcslen])
  dnl Use the _snprintf function only if it is declared (because on NetBSD it
  dnl is defined as a weak alias of snprintf; we prefer to use the latter).
  AC_CHECK_DECLS([_snprintf], , , [#include <stdio.h>])
@@ -74,7 +73,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_LONG_DOUBLE],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         'long double' arguments.])
      ;;
@@ -90,7 +89,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_INFINITE_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_INFINITE_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         infinite 'double' arguments.])
      ;;
@@ -111,7 +110,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE],
        *yes)
          ;;
        *)
-          AC_DEFINE([NEED_PRINTF_INFINITE_LONG_DOUBLE], 1,
+          AC_DEFINE([NEED_PRINTF_INFINITE_LONG_DOUBLE], [1],
            [Define if the vasnprintf implementation needs special code for
             infinite 'long double' arguments.])
          ;;
@@ -128,7 +127,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_DIRECTIVE_A],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_DIRECTIVE_A], 1,
+      AC_DEFINE([NEED_PRINTF_DIRECTIVE_A], [1],
        [Define if the vasnprintf implementation needs special code for
         the 'a' and 'A' directives.])
      AC_CHECK_FUNCS([nl_langinfo])
@@ -144,7 +143,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_DIRECTIVE_F],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_DIRECTIVE_F], 1,
+      AC_DEFINE([NEED_PRINTF_DIRECTIVE_F], [1],
        [Define if the vasnprintf implementation needs special code for
         the 'F' directive.])
      ;;
@@ -159,7 +158,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_GROUPING],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_FLAG_GROUPING], 1,
+      AC_DEFINE([NEED_PRINTF_FLAG_GROUPING], [1],
        [Define if the vasnprintf implementation needs special code for the
         ' flag.])
      ;;
@@ -174,7 +173,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_FLAG_LEFTADJUST], 1,
+      AC_DEFINE([NEED_PRINTF_FLAG_LEFTADJUST], [1],
        [Define if the vasnprintf implementation needs special code for the
         '-' flag.])
      ;;
@@ -189,7 +188,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_ZERO],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_FLAG_ZERO], 1,
+      AC_DEFINE([NEED_PRINTF_FLAG_ZERO], [1],
        [Define if the vasnprintf implementation needs special code for the
         0 flag.])
      ;;
@@ -204,13 +203,13 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_PRECISION],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_UNBOUNDED_PRECISION], 1,
+      AC_DEFINE([NEED_PRINTF_UNBOUNDED_PRECISION], [1],
        [Define if the vasnprintf implementation needs special code for
         supporting large precisions without arbitrary bounds.])
-      AC_DEFINE([NEED_PRINTF_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         'double' arguments.])
-      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         'long double' arguments.])
      ;;
@@ -226,13 +225,13 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_ENOMEM],
    *yes)
      ;;
    *)
-      AC_DEFINE([NEED_PRINTF_ENOMEM], 1,
+      AC_DEFINE([NEED_PRINTF_ENOMEM], [1],
        [Define if the vasnprintf implementation needs special code for
         surviving out-of-memory conditions.])
-      AC_DEFINE([NEED_PRINTF_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         'double' arguments.])
-      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], 1,
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
        [Define if the vasnprintf implementation needs special code for
         'long double' arguments.])
      ;;
diff --git a/gl/m4/visibility.m4 b/gl/m4/visibility.m4
index 2ff6330a..70bca564 100644
--- a/gl/m4/visibility.m4
+++ b/gl/m4/visibility.m4
@@ -1,5 +1,5 @@
-# visibility.m4 serial 1 (gettext-0.15)
+# visibility.m4 serial 2 (gettext-0.18)
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+dnl Copyright (C) 2005, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -27,7 +27,7 @@ AC_DEFUN([gl_VISIBILITY],
  HAVE_VISIBILITY=0
  if test -n "$GCC"; then
    AC_MSG_CHECKING([for simple visibility declarations])
-    AC_CACHE_VAL(gl_cv_cc_visibility, [
+    AC_CACHE_VAL([gl_cv_cc_visibility], [
      gl_save_CFLAGS="$CFLAGS"
      CFLAGS="$CFLAGS -fvisibility=hidden"
      AC_TRY_COMPILE(
@@ -36,8 +36,8 @@ AC_DEFUN([gl_VISIBILITY],
         extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
         extern __attribute__((__visibility__("default"))) int exportedfunc (void);],
        [],
-        gl_cv_cc_visibility=yes,
+        [gl_cv_cc_visibility=yes],
-        gl_cv_cc_visibility=no)
+        [gl_cv_cc_visibility=no])
      CFLAGS="$gl_save_CFLAGS"])
    AC_MSG_RESULT([$gl_cv_cc_visibility])
    if test $gl_cv_cc_visibility = yes; then
diff --git a/gl/m4/vsnprintf.m4 b/gl/m4/vsnprintf.m4
index accc79f8..3b37d460 100644
--- a/gl/m4/vsnprintf.m4
+++ b/gl/m4/vsnprintf.m4
@@ -1,5 +1,5 @@
-# vsnprintf.m4 serial 4
+# vsnprintf.m4 serial 5
-dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2004, 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -7,8 +7,17 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_VSNPRINTF],
 [
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  gl_cv_func_vsnprintf_usable=no
  AC_CHECK_FUNCS([vsnprintf])
-  if test $ac_cv_func_vsnprintf = no; then
+  if test $ac_cv_func_vsnprintf = yes; then
+    gl_SNPRINTF_SIZE1
+    case "$gl_cv_func_snprintf_size1" in
+      *yes)
+        gl_cv_func_vsnprintf_usable=yes
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_vsnprintf_usable = no; then
    gl_REPLACE_VSNPRINTF
  fi
  AC_CHECK_DECLS_ONCE([vsnprintf])
diff --git a/gl/m4/wchar.m4 b/gl/m4/wchar.m4
index 70b1248f..ba8ee6ab 100644
--- a/gl/m4/wchar.m4
+++ b/gl/m4/wchar.m4
@@ -1,13 +1,13 @@
 dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl Written by Eric Blake.
-# wchar.m4 serial 4
+# wchar.m4 serial 22
 AC_DEFUN([gl_WCHAR_H],
 [
@@ -18,7 +18,16 @@ AC_DEFUN([gl_WCHAR_H],
 wchar_t w;]],
      [gl_cv_header_wchar_h_standalone=yes],
      [gl_cv_header_wchar_h_standalone=no])])
-  if test $gl_cv_header_wchar_h_standalone != yes; then
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  if test $gt_cv_c_wint_t = yes; then
+    HAVE_WINT_T=1
+  else
+    HAVE_WINT_T=0
+  fi
+  AC_SUBST([HAVE_WINT_T])
+  if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
    WCHAR_H=wchar.h
  fi
@@ -36,6 +45,13 @@ wchar_t w;]],
  gl_CHECK_NEXT_HEADERS([wchar.h])
 ])
+dnl Unconditionally enables the replacement of <wchar.h>.
+AC_DEFUN([gl_REPLACE_WCHAR_H],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  WCHAR_H=wchar.h
+])
 AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
 [
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
@@ -45,10 +61,39 @@ AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
 AC_DEFUN([gl_WCHAR_H_DEFAULTS],
 [
-  GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
+  GNULIB_BTOWC=0;      AC_SUBST([GNULIB_BTOWC])
+  GNULIB_WCTOB=0;      AC_SUBST([GNULIB_WCTOB])
+  GNULIB_MBSINIT=0;    AC_SUBST([GNULIB_MBSINIT])
+  GNULIB_MBRTOWC=0;    AC_SUBST([GNULIB_MBRTOWC])
+  GNULIB_MBRLEN=0;     AC_SUBST([GNULIB_MBRLEN])
+  GNULIB_MBSRTOWCS=0;  AC_SUBST([GNULIB_MBSRTOWCS])
+  GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
+  GNULIB_WCRTOMB=0;    AC_SUBST([GNULIB_WCRTOMB])
+  GNULIB_WCSRTOMBS=0;  AC_SUBST([GNULIB_WCSRTOMBS])
+  GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
+  GNULIB_WCWIDTH=0;    AC_SUBST([GNULIB_WCWIDTH])
  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_BTOWC=1;        AC_SUBST([HAVE_BTOWC])
+  HAVE_MBSINIT=1;      AC_SUBST([HAVE_MBSINIT])
+  HAVE_MBRTOWC=1;      AC_SUBST([HAVE_MBRTOWC])
+  HAVE_MBRLEN=1;       AC_SUBST([HAVE_MBRLEN])
+  HAVE_MBSRTOWCS=1;    AC_SUBST([HAVE_MBSRTOWCS])
+  HAVE_MBSNRTOWCS=1;   AC_SUBST([HAVE_MBSNRTOWCS])
+  HAVE_WCRTOMB=1;      AC_SUBST([HAVE_WCRTOMB])
+  HAVE_WCSRTOMBS=1;    AC_SUBST([HAVE_WCSRTOMBS])
+  HAVE_WCSNRTOMBS=1;   AC_SUBST([HAVE_WCSNRTOMBS])
+  HAVE_DECL_WCTOB=1;   AC_SUBST([HAVE_DECL_WCTOB])
  HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
+  REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
+  REPLACE_BTOWC=0;     AC_SUBST([REPLACE_BTOWC])
+  REPLACE_WCTOB=0;     AC_SUBST([REPLACE_WCTOB])
+  REPLACE_MBSINIT=0;   AC_SUBST([REPLACE_MBSINIT])
+  REPLACE_MBRTOWC=0;   AC_SUBST([REPLACE_MBRTOWC])
+  REPLACE_MBRLEN=0;    AC_SUBST([REPLACE_MBRLEN])
+  REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
+  REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
+  REPLACE_WCRTOMB=0;   AC_SUBST([REPLACE_WCRTOMB])
+  REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
  REPLACE_WCWIDTH=0;   AC_SUBST([REPLACE_WCWIDTH])
-  WCHAR_H=
+  WCHAR_H='';          AC_SUBST([WCHAR_H])
-  AC_SUBST([WCHAR_H])
 ])
diff --git a/gl/m4/wchar_t.m4 b/gl/m4/wchar_t.m4
index cde2129a..fb27a7f6 100644
--- a/gl/m4/wchar_t.m4
+++ b/gl/m4/wchar_t.m4
@@ -1,5 +1,5 @@
-# wchar_t.m4 serial 1 (gettext-0.12)
+# wchar_t.m4 serial 3 (gettext-0.18)
-dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -10,11 +10,11 @@ dnl Prerequisite: AC_PROG_CC
 AC_DEFUN([gt_TYPE_WCHAR_T],
 [
-  AC_CACHE_CHECK([for wchar_t], gt_cv_c_wchar_t,
+  AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
    [AC_TRY_COMPILE([#include <stddef.h>
       wchar_t foo = (wchar_t)'\0';], ,
-       gt_cv_c_wchar_t=yes, gt_cv_c_wchar_t=no)])
+       [gt_cv_c_wchar_t=yes], [gt_cv_c_wchar_t=no])])
  if test $gt_cv_c_wchar_t = yes; then
-    AC_DEFINE(HAVE_WCHAR_T, 1, [Define if you have the 'wchar_t' type.])
+    AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
  fi
 ])
diff --git a/gl/m4/wcrtomb.m4 b/gl/m4/wcrtomb.m4
new file mode 100644
index 00000000..22d94336
--- /dev/null
+++ b/gl/m4/wcrtomb.m4
@@ -0,0 +1,88 @@
+# wcrtomb.m4 serial 2
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_WCRTOMB],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_CHECK_FUNCS_ONCE([wcrtomb])
+  if test $ac_cv_func_wcrtomb = no; then
+    HAVE_WCRTOMB=0
+  else
+    dnl On OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes
+    dnl returns 0 instead of 1.
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([gt_LOCALE_FR])
+    AC_REQUIRE([gt_LOCALE_FR_UTF8])
+    AC_REQUIRE([gt_LOCALE_JA])
+    AC_REQUIRE([gt_LOCALE_ZH_CN])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether wcrtomb return value is correct],
+      [gl_cv_func_wcrtomb_retval],
+      [
+        dnl Initial guess, used when cross-compiling or when no suitable locale
+        dnl is present.
+changequote(,)dnl
+        case "$host_os" in
+                           # Guess no on OSF/1 and Solaris.
+          osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;
+                           # Guess yes otherwise.
+          *)               gl_cv_func_wcrtomb_retval="guessing yes" ;;
+        esac
+changequote([,])dnl
+        if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+          AC_TRY_RUN([
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  return 0;
+}],
+            [gl_cv_func_wcrtomb_retval=yes],
+            [gl_cv_func_wcrtomb_retval=no],
+            [])
+        fi
+      ])
+    case "$gl_cv_func_wcrtomb_retval" in
+      *yes) ;;
+      *) REPLACE_WCRTOMB=1 ;;
+    esac
+  fi
+  if test $HAVE_WCRTOMB = 0 || test $REPLACE_WCRTOMB = 1; then
+    gl_REPLACE_WCHAR_H
+    AC_LIBOBJ([wcrtomb])
+    gl_PREREQ_WCRTOMB
+  fi
+])
+# Prerequisites of lib/wcrtomb.c.
+AC_DEFUN([gl_PREREQ_WCRTOMB], [
+  :
+])
diff --git a/gl/m4/wctype.m4 b/gl/m4/wctype.m4
index 7483c4fe..6a1b6f07 100644
--- a/gl/m4/wctype.m4
+++ b/gl/m4/wctype.m4
@@ -1,6 +1,8 @@
+# wctype.m4 serial 2
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
-dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,6 +11,7 @@ dnl Written by Paul Eggert.
 AC_DEFUN([gl_WCTYPE_H],
 [
+  AC_REQUIRE([AC_PROG_CC])
  AC_CHECK_FUNCS_ONCE([iswcntrl])
  if test $ac_cv_func_iswcntrl = yes; then
    HAVE_ISWCNTRL=1
@@ -30,7 +33,27 @@ AC_DEFUN([gl_WCTYPE_H],
  WCTYPE_H=wctype.h
  if test $ac_cv_header_wctype_h = yes; then
    if test $ac_cv_func_iswcntrl = yes; then
-      WCTYPE_H=
+      dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
+      dnl The other functions are likely broken in the same way.
+      AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
+        [
+          AC_TRY_RUN([#include <stddef.h>
+                      #include <stdio.h>
+                      #include <time.h>
+                      #include <wchar.h>
+                      #include <wctype.h>
+                      int main () { return iswprint ('x') == 0; }],
+            [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
+            [AC_TRY_COMPILE([#include <stdlib.h>
+                          #if __GNU_LIBRARY__ == 1
+                          Linux libc5 i18n is broken.
+                          #endif], [],
+              [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
+            ])
+        ])
+      if test $gl_cv_func_iswcntrl_works = yes; then
+        WCTYPE_H=
+      fi
    fi
    dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,
    dnl for the benefit of builds from non-distclean directories.
@@ -41,4 +64,11 @@ AC_DEFUN([gl_WCTYPE_H],
  fi
  AC_SUBST([HAVE_WCTYPE_H])
  AC_SUBST([WCTYPE_H])
+  if test "$gl_cv_func_iswcntrl_works" = no; then
+    REPLACE_ISWCNTRL=1
+  else
+    REPLACE_ISWCNTRL=0
+  fi
+  AC_SUBST([REPLACE_ISWCNTRL])
 ])
diff --git a/gl/m4/wint_t.m4 b/gl/m4/wint_t.m4
index af5ed936..47a4363d 100644
--- a/gl/m4/wint_t.m4
+++ b/gl/m4/wint_t.m4
@@ -1,5 +1,5 @@
-# wint_t.m4 serial 2 (gettext-0.17)
+# wint_t.m4 serial 4 (gettext-0.18)
-dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+dnl Copyright (C) 2003, 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -10,7 +10,7 @@ dnl Prerequisite: AC_PROG_CC
 AC_DEFUN([gt_TYPE_WINT_T],
 [
-  AC_CACHE_CHECK([for wint_t], gt_cv_c_wint_t,
+  AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t],
    [AC_TRY_COMPILE([
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
   <wchar.h>.
@@ -21,8 +21,8 @@ AC_DEFUN([gt_TYPE_WINT_T],
 #include <time.h>
 #include <wchar.h>
       wint_t foo = (wchar_t)'\0';], ,
-       gt_cv_c_wint_t=yes, gt_cv_c_wint_t=no)])
+       [gt_cv_c_wint_t=yes], [gt_cv_c_wint_t=no])])
  if test $gt_cv_c_wint_t = yes; then
-    AC_DEFINE(HAVE_WINT_T, 1, [Define if you have the 'wint_t' type.])
+    AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.])
  fi
 ])
diff --git a/gl/m4/write.m4 b/gl/m4/write.m4
new file mode 100644
index 00000000..812b19b3
--- /dev/null
+++ b/gl/m4/write.m4
@@ -0,0 +1,20 @@
+# write.m4 serial 1
+dnl Copyright (C) 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_FUNC_WRITE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  dnl This ifdef is just an optimization, to avoid performing a configure
+  dnl check whose result is not used. It does not make the test of
+  dnl GNULIB_UNISTD_H_SIGPIPE or GNULIB_SIGPIPE redundant.
+  m4_ifdef([gl_SIGNAL_SIGPIPE], [
+    gl_SIGNAL_SIGPIPE
+    if test $gl_cv_header_signal_h_SIGPIPE != yes; then
+      REPLACE_WRITE=1
+      AC_LIBOBJ([write])
+    fi
+  ])
+])
diff --git a/gl/m4/xsize.m4 b/gl/m4/xsize.m4
index 85bb721e..631893cf 100644
--- a/gl/m4/xsize.m4
+++ b/gl/m4/xsize.m4
@@ -1,5 +1,5 @@
-# xsize.m4 serial 3
+# xsize.m4 serial 4
-dnl Copyright (C) 2003-2004 Free Software Foundation, Inc.
+dnl Copyright (C) 2003-2004, 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -9,5 +9,5 @@ AC_DEFUN([gl_XSIZE],
  dnl Prerequisites of lib/xsize.h.
  AC_REQUIRE([gl_SIZE_MAX])
  AC_REQUIRE([AC_C_INLINE])
-  AC_CHECK_HEADERS(stdint.h)
+  AC_CHECK_HEADERS([stdint.h])
 ])