summaryrefslogtreecommitdiffstats
path: root/gl/m4/include_next.m4
diff options
context:
space:
mode:
authorThomas Guyot-Sionnest <dermoth@users.sourceforge.net>2008-02-12 11:07:18 (GMT)
committerThomas Guyot-Sionnest <dermoth@users.sourceforge.net>2008-02-12 11:07:18 (GMT)
commitbd7029a99b0c2974265c6665638ef14a052f42ab (patch)
treef5661ba73366d81ef6e91f889ea7fec5ebe07b6b /gl/m4/include_next.m4
parentf99612320d6eda67644c07be04bb21aa4d7789db (diff)
downloadmonitoring-plugins-bd7029a99b0c2974265c6665638ef14a052f42ab.tar.gz
Sync to latest Gnulib
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1925 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'gl/m4/include_next.m4')
-rw-r--r--gl/m4/include_next.m4107
1 files changed, 107 insertions, 0 deletions
diff --git a/gl/m4/include_next.m4 b/gl/m4/include_next.m4
new file mode 100644
index 0000000..7ce472b
--- /dev/null
+++ b/gl/m4/include_next.m4
@@ -0,0 +1,107 @@
1# include_next.m4 serial 4
2dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Paul Eggert and Derek Price.
8
9AC_DEFUN([gl_INCLUDE_NEXT],
10[
11 AC_LANG_PREPROC_REQUIRE()
12 AC_CACHE_CHECK([whether the preprocessor supports include_next],
13 [gl_cv_have_include_next],
14 [rm -rf conftestd1 conftestd2
15 mkdir conftestd1 conftestd2
16 cat <<EOF > conftestd1/conftest.h
17#define DEFINED_IN_CONFTESTD1
18#include_next <conftest.h>
19#ifdef DEFINED_IN_CONFTESTD2
20int foo;
21#else
22#error "include_next doesn't work"
23#endif
24EOF
25 cat <<EOF > conftestd2/conftest.h
26#ifndef DEFINED_IN_CONFTESTD1
27#error "include_next test doesn't work"
28#endif
29#define DEFINED_IN_CONFTESTD2
30EOF
31 save_CPPFLAGS="$CPPFLAGS"
32 CPPFLAGS="$CPPFLAGS -Iconftestd1 -Iconftestd2"
33 AC_COMPILE_IFELSE([#include <conftest.h>],
34 [gl_cv_have_include_next=yes],
35 [gl_cv_have_include_next=no])
36 CPPFLAGS="$save_CPPFLAGS"
37 rm -rf conftestd1 conftestd2
38 ])
39 if test $gl_cv_have_include_next = yes; then
40
41 dnl FIXME: Remove HAVE_INCLUDE_NEXT and update everything that uses it
42 dnl to use @INCLUDE_NEXT@ instead.
43 AC_DEFINE([HAVE_INCLUDE_NEXT], 1,
44 [Define if your compiler supports the #include_next directive.])
45
46 INCLUDE_NEXT=include_next
47 else
48 INCLUDE_NEXT=include
49 fi
50 AC_SUBST([INCLUDE_NEXT])
51])
52
53# gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...)
54# ------------------------------------------
55# For each arg foo.h, if #include_next works, define NEXT_FOO_H to be
56# '<foo.h>'; otherwise define it to be
57# '"///usr/include/foo.h"', or whatever other absolute file name is suitable.
58# That way, a header file with the following line:
59# #@INCLUDE_NEXT@ @NEXT_FOO_H@
60# behaves (after sed substitution) as if it contained
61# #include_next <foo.h>
62# even if the compiler does not support include_next.
63# The three "///" are to pacify Sun C 5.8, which otherwise would say
64# "warning: #include of /usr/include/... may be non-portable".
65# Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
66AC_DEFUN([gl_CHECK_NEXT_HEADERS],
67[
68 AC_REQUIRE([gl_INCLUDE_NEXT])
69 AC_CHECK_HEADERS_ONCE([$1])
70
71 AC_FOREACH([gl_HEADER_NAME], [$1],
72 [AS_VAR_PUSHDEF([gl_next_header],
73 [gl_cv_next_]m4_quote(m4_defn([gl_HEADER_NAME])))
74 if test $gl_cv_have_include_next = yes; then
75 AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
76 else
77 AC_CACHE_CHECK(
78 [absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>],
79 m4_quote(m4_defn([gl_next_header])),
80 [AS_VAR_PUSHDEF([gl_header_exists],
81 [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME])))
82 if test AS_VAR_GET(gl_header_exists) = yes; then
83 AC_LANG_CONFTEST(
84 [AC_LANG_SOURCE(
85 [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]]
86 )])
87 dnl eval is necessary to expand ac_cpp.
88 dnl Ultrix and Pyramid sh refuse to redirect output of eval,
89 dnl so use subshell.
90 AS_VAR_SET([gl_next_header],
91 ['"'`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
92 sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{
93 s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#
94 s#^/[^/]#//&#
95 p
96 q
97 }'`'"'])
98 else
99 AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
100 fi
101 AS_VAR_POPDEF([gl_header_exists])])
102 fi
103 AC_SUBST(
104 AS_TR_CPP([NEXT_]m4_quote(m4_defn([gl_HEADER_NAME]))),
105 [AS_VAR_GET([gl_next_header])])
106 AS_VAR_POPDEF([gl_next_header])])
107])