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authorThomas Guyot-Sionnest <dermoth@aei.ca>2010-04-08 01:11:46 (GMT)
committerThomas Guyot-Sionnest <dermoth@aei.ca>2010-04-13 01:26:35 (GMT)
commit74da141e618ef99959d509cb2e7be35a348a39db (patch)
tree88ebc38b381a1021fc2d74864a71e230ae591c3d /gl/m4/wchar_h.m4
parentc63a4f726a0b6ad8cf6040f947754a81fd4683bb (diff)
downloadmonitoring-plugins-74da141e618ef99959d509cb2e7be35a348a39db.tar.gz
Sync with the latest Gnulib code (177f525)
Signed-off-by: Thomas Guyot-Sionnest <dermoth@aei.ca>
Diffstat (limited to 'gl/m4/wchar_h.m4')
-rw-r--r--gl/m4/wchar_h.m4152
1 files changed, 152 insertions, 0 deletions
diff --git a/gl/m4/wchar_h.m4 b/gl/m4/wchar_h.m4
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1dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
2
3dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
4dnl This file is free software; the Free Software Foundation
5dnl gives unlimited permission to copy and/or distribute it,
6dnl with or without modifications, as long as this notice is preserved.
7
8dnl Written by Eric Blake.
9
10# wchar_h.m4 serial 33
11
12AC_DEFUN([gl_WCHAR_H],
13[
14 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
15 AC_REQUIRE([gl_WCHAR_H_INLINE_OK])
16 dnl Prepare for creating substitute <wchar.h>.
17 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
18 dnl character support).
19 dnl <wchar.h> is always overridden, because of GNULIB_POSIXCHECK.
20 AC_CHECK_HEADERS_ONCE([wchar.h])
21 gl_CHECK_NEXT_HEADERS([wchar.h])
22 if test $ac_cv_header_wchar_h = yes; then
23 HAVE_WCHAR_H=1
24 else
25 HAVE_WCHAR_H=0
26 fi
27 AC_SUBST([HAVE_WCHAR_H])
28
29 AC_REQUIRE([gt_TYPE_WINT_T])
30 if test $gt_cv_c_wint_t = yes; then
31 HAVE_WINT_T=1
32 else
33 HAVE_WINT_T=0
34 fi
35 AC_SUBST([HAVE_WINT_T])
36
37 dnl Check for declarations of anything we want to poison if the
38 dnl corresponding gnulib module is not in use.
39 gl_WARN_ON_USE_PREPARE([[
40/* Some systems require additional headers. */
41#ifndef __GLIBC__
42# include <stddef.h>
43# include <stdio.h>
44# include <time.h>
45#endif
46#include <wchar.h>
47 ]], [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb
48 wcsrtombs wcsnrtombs wcwidth])
49])
50
51dnl Check whether <wchar.h> is usable at all.
52AC_DEFUN([gl_WCHAR_H_INLINE_OK],
53[
54 dnl Test whether <wchar.h> suffers due to the transition from '__inline' to
55 dnl 'gnu_inline'. See <http://sourceware.org/bugzilla/show_bug.cgi?id=4022>
56 dnl and <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary,
57 dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and
58 dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>.
59 AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly],
60 [gl_cv_header_wchar_h_correct_inline],
61 [gl_cv_header_wchar_h_correct_inline=yes
62 AC_LANG_CONFTEST([
63 AC_LANG_SOURCE([[#define wcstod renamed_wcstod
64#include <wchar.h>
65extern int zero (void);
66int main () { return zero(); }
67]])])
68 if AC_TRY_EVAL([ac_compile]); then
69 mv conftest.$ac_objext conftest1.$ac_objext
70 AC_LANG_CONFTEST([
71 AC_LANG_SOURCE([[#define wcstod renamed_wcstod
72#include <wchar.h>
73int zero (void) { return 0; }
74]])])
75 if AC_TRY_EVAL([ac_compile]); then
76 mv conftest.$ac_objext conftest2.$ac_objext
77 if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
78 :
79 else
80 gl_cv_header_wchar_h_correct_inline=no
81 fi
82 fi
83 fi
84 rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext
85 ])
86 if test $gl_cv_header_wchar_h_correct_inline = no; then
87 AC_MSG_ERROR([<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS).
88This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in
89C99 mode. You have four options:
90 - Add the flag -fgnu89-inline to CC and reconfigure, or
91 - Fix your include files, using parts of
92 <http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or
93 - Use a gcc version older than 4.3, or
94 - Don't use the flags -std=c99 or -std=gnu99.
95Configuration aborted.])
96 fi
97])
98
99dnl Unconditionally enables the replacement of <wchar.h>.
100AC_DEFUN([gl_REPLACE_WCHAR_H],
101[
102 dnl This is a no-op, because <wchar.h> is always overridden.
103 :
104])
105
106AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
107[
108 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
109 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
110 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
111 dnl Define it also as a C macro, for the benefit of the unit tests.
112 gl_MODULE_INDICATOR_FOR_TESTS([$1])
113])
114
115AC_DEFUN([gl_WCHAR_H_DEFAULTS],
116[
117 GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
118 GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
119 GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
120 GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC])
121 GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN])
122 GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS])
123 GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
124 GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB])
125 GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS])
126 GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
127 GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
128 dnl Assume proper GNU behavior unless another module says otherwise.
129 HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
130 HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
131 HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
132 HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
133 HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
134 HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
135 HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
136 HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
137 HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
138 HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
139 HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
140 REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
141 REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC])
142 REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
143 REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
144 REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
145 REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
146 REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
147 REPLACE_MBSNRTOWCS=0; AC_SUBST([REPLACE_MBSNRTOWCS])
148 REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
149 REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
150 REPLACE_WCSNRTOMBS=0; AC_SUBST([REPLACE_WCSNRTOMBS])
151 REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
152])