Commit | Line | Data |
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8690e634 JK |
1 | dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues. |
2 | ||
3 | dnl Copyright (C) 2007-2012 Free Software Foundation, Inc. | |
4 | dnl This file is free software; the Free Software Foundation | |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
7 | ||
8 | dnl Written by Eric Blake. | |
9 | ||
10 | # wchar_h.m4 serial 39 | |
11 | ||
12 | AC_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 | gl_CHECK_NEXT_HEADERS([wchar.h]) | |
21 | if test $ac_cv_header_wchar_h = yes; then | |
22 | HAVE_WCHAR_H=1 | |
23 | else | |
24 | HAVE_WCHAR_H=0 | |
25 | fi | |
26 | AC_SUBST([HAVE_WCHAR_H]) | |
27 | ||
28 | AC_REQUIRE([gl_FEATURES_H]) | |
29 | ||
30 | AC_REQUIRE([gt_TYPE_WINT_T]) | |
31 | if test $gt_cv_c_wint_t = yes; then | |
32 | HAVE_WINT_T=1 | |
33 | else | |
34 | HAVE_WINT_T=0 | |
35 | fi | |
36 | AC_SUBST([HAVE_WINT_T]) | |
37 | ||
38 | dnl Check for declarations of anything we want to poison if the | |
39 | dnl corresponding gnulib module is not in use. | |
40 | gl_WARN_ON_USE_PREPARE([[ | |
41 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
42 | <wchar.h>. | |
43 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
44 | included before <wchar.h>. */ | |
45 | #if !(defined __GLIBC__ && !defined __UCLIBC__) | |
46 | # include <stddef.h> | |
47 | # include <stdio.h> | |
48 | # include <time.h> | |
49 | #endif | |
50 | #include <wchar.h> | |
51 | ]], | |
52 | [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb | |
53 | wcsrtombs wcsnrtombs wcwidth wmemchr wmemcmp wmemcpy wmemmove wmemset | |
54 | wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat wcscmp | |
55 | wcsncmp wcscasecmp wcsncasecmp wcscoll wcsxfrm wcsdup wcschr wcsrchr | |
56 | wcscspn wcsspn wcspbrk wcsstr wcstok wcswidth | |
57 | ]) | |
58 | ]) | |
59 | ||
60 | dnl Check whether <wchar.h> is usable at all. | |
61 | AC_DEFUN([gl_WCHAR_H_INLINE_OK], | |
62 | [ | |
63 | dnl Test whether <wchar.h> suffers due to the transition from '__inline' to | |
64 | dnl 'gnu_inline'. See <http://sourceware.org/bugzilla/show_bug.cgi?id=4022> | |
65 | dnl and <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary, | |
66 | dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and | |
67 | dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>. | |
68 | AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly], | |
69 | [gl_cv_header_wchar_h_correct_inline], | |
70 | [gl_cv_header_wchar_h_correct_inline=yes | |
71 | AC_LANG_CONFTEST([ | |
72 | AC_LANG_SOURCE([[#define wcstod renamed_wcstod | |
73 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
74 | <wchar.h>. | |
75 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
76 | included before <wchar.h>. */ | |
77 | #include <stddef.h> | |
78 | #include <stdio.h> | |
79 | #include <time.h> | |
80 | #include <wchar.h> | |
81 | extern int zero (void); | |
82 | int main () { return zero(); } | |
83 | ]])]) | |
84 | if AC_TRY_EVAL([ac_compile]); then | |
85 | mv conftest.$ac_objext conftest1.$ac_objext | |
86 | AC_LANG_CONFTEST([ | |
87 | AC_LANG_SOURCE([[#define wcstod renamed_wcstod | |
88 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
89 | <wchar.h>. | |
90 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
91 | included before <wchar.h>. */ | |
92 | #include <stddef.h> | |
93 | #include <stdio.h> | |
94 | #include <time.h> | |
95 | #include <wchar.h> | |
96 | int zero (void) { return 0; } | |
97 | ]])]) | |
98 | if AC_TRY_EVAL([ac_compile]); then | |
99 | mv conftest.$ac_objext conftest2.$ac_objext | |
100 | if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then | |
101 | : | |
102 | else | |
103 | gl_cv_header_wchar_h_correct_inline=no | |
104 | fi | |
105 | fi | |
106 | fi | |
107 | rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext | |
108 | ]) | |
109 | if test $gl_cv_header_wchar_h_correct_inline = no; then | |
110 | AC_MSG_ERROR([<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS). | |
111 | This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in | |
112 | C99 mode. You have four options: | |
113 | - Add the flag -fgnu89-inline to CC and reconfigure, or | |
114 | - Fix your include files, using parts of | |
115 | <http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or | |
116 | - Use a gcc version older than 4.3, or | |
117 | - Don't use the flags -std=c99 or -std=gnu99. | |
118 | Configuration aborted.]) | |
119 | fi | |
120 | ]) | |
121 | ||
122 | AC_DEFUN([gl_WCHAR_MODULE_INDICATOR], | |
123 | [ | |
124 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
125 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
126 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | |
127 | dnl Define it also as a C macro, for the benefit of the unit tests. | |
128 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) | |
129 | ]) | |
130 | ||
131 | AC_DEFUN([gl_WCHAR_H_DEFAULTS], | |
132 | [ | |
133 | GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC]) | |
134 | GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB]) | |
135 | GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT]) | |
136 | GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC]) | |
137 | GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN]) | |
138 | GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS]) | |
139 | GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS]) | |
140 | GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB]) | |
141 | GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS]) | |
142 | GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS]) | |
143 | GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH]) | |
144 | GNULIB_WMEMCHR=0; AC_SUBST([GNULIB_WMEMCHR]) | |
145 | GNULIB_WMEMCMP=0; AC_SUBST([GNULIB_WMEMCMP]) | |
146 | GNULIB_WMEMCPY=0; AC_SUBST([GNULIB_WMEMCPY]) | |
147 | GNULIB_WMEMMOVE=0; AC_SUBST([GNULIB_WMEMMOVE]) | |
148 | GNULIB_WMEMSET=0; AC_SUBST([GNULIB_WMEMSET]) | |
149 | GNULIB_WCSLEN=0; AC_SUBST([GNULIB_WCSLEN]) | |
150 | GNULIB_WCSNLEN=0; AC_SUBST([GNULIB_WCSNLEN]) | |
151 | GNULIB_WCSCPY=0; AC_SUBST([GNULIB_WCSCPY]) | |
152 | GNULIB_WCPCPY=0; AC_SUBST([GNULIB_WCPCPY]) | |
153 | GNULIB_WCSNCPY=0; AC_SUBST([GNULIB_WCSNCPY]) | |
154 | GNULIB_WCPNCPY=0; AC_SUBST([GNULIB_WCPNCPY]) | |
155 | GNULIB_WCSCAT=0; AC_SUBST([GNULIB_WCSCAT]) | |
156 | GNULIB_WCSNCAT=0; AC_SUBST([GNULIB_WCSNCAT]) | |
157 | GNULIB_WCSCMP=0; AC_SUBST([GNULIB_WCSCMP]) | |
158 | GNULIB_WCSNCMP=0; AC_SUBST([GNULIB_WCSNCMP]) | |
159 | GNULIB_WCSCASECMP=0; AC_SUBST([GNULIB_WCSCASECMP]) | |
160 | GNULIB_WCSNCASECMP=0; AC_SUBST([GNULIB_WCSNCASECMP]) | |
161 | GNULIB_WCSCOLL=0; AC_SUBST([GNULIB_WCSCOLL]) | |
162 | GNULIB_WCSXFRM=0; AC_SUBST([GNULIB_WCSXFRM]) | |
163 | GNULIB_WCSDUP=0; AC_SUBST([GNULIB_WCSDUP]) | |
164 | GNULIB_WCSCHR=0; AC_SUBST([GNULIB_WCSCHR]) | |
165 | GNULIB_WCSRCHR=0; AC_SUBST([GNULIB_WCSRCHR]) | |
166 | GNULIB_WCSCSPN=0; AC_SUBST([GNULIB_WCSCSPN]) | |
167 | GNULIB_WCSSPN=0; AC_SUBST([GNULIB_WCSSPN]) | |
168 | GNULIB_WCSPBRK=0; AC_SUBST([GNULIB_WCSPBRK]) | |
169 | GNULIB_WCSSTR=0; AC_SUBST([GNULIB_WCSSTR]) | |
170 | GNULIB_WCSTOK=0; AC_SUBST([GNULIB_WCSTOK]) | |
171 | GNULIB_WCSWIDTH=0; AC_SUBST([GNULIB_WCSWIDTH]) | |
172 | dnl Assume proper GNU behavior unless another module says otherwise. | |
173 | HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC]) | |
174 | HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT]) | |
175 | HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC]) | |
176 | HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN]) | |
177 | HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS]) | |
178 | HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS]) | |
179 | HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB]) | |
180 | HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS]) | |
181 | HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS]) | |
182 | HAVE_WMEMCHR=1; AC_SUBST([HAVE_WMEMCHR]) | |
183 | HAVE_WMEMCMP=1; AC_SUBST([HAVE_WMEMCMP]) | |
184 | HAVE_WMEMCPY=1; AC_SUBST([HAVE_WMEMCPY]) | |
185 | HAVE_WMEMMOVE=1; AC_SUBST([HAVE_WMEMMOVE]) | |
186 | HAVE_WMEMSET=1; AC_SUBST([HAVE_WMEMSET]) | |
187 | HAVE_WCSLEN=1; AC_SUBST([HAVE_WCSLEN]) | |
188 | HAVE_WCSNLEN=1; AC_SUBST([HAVE_WCSNLEN]) | |
189 | HAVE_WCSCPY=1; AC_SUBST([HAVE_WCSCPY]) | |
190 | HAVE_WCPCPY=1; AC_SUBST([HAVE_WCPCPY]) | |
191 | HAVE_WCSNCPY=1; AC_SUBST([HAVE_WCSNCPY]) | |
192 | HAVE_WCPNCPY=1; AC_SUBST([HAVE_WCPNCPY]) | |
193 | HAVE_WCSCAT=1; AC_SUBST([HAVE_WCSCAT]) | |
194 | HAVE_WCSNCAT=1; AC_SUBST([HAVE_WCSNCAT]) | |
195 | HAVE_WCSCMP=1; AC_SUBST([HAVE_WCSCMP]) | |
196 | HAVE_WCSNCMP=1; AC_SUBST([HAVE_WCSNCMP]) | |
197 | HAVE_WCSCASECMP=1; AC_SUBST([HAVE_WCSCASECMP]) | |
198 | HAVE_WCSNCASECMP=1; AC_SUBST([HAVE_WCSNCASECMP]) | |
199 | HAVE_WCSCOLL=1; AC_SUBST([HAVE_WCSCOLL]) | |
200 | HAVE_WCSXFRM=1; AC_SUBST([HAVE_WCSXFRM]) | |
201 | HAVE_WCSDUP=1; AC_SUBST([HAVE_WCSDUP]) | |
202 | HAVE_WCSCHR=1; AC_SUBST([HAVE_WCSCHR]) | |
203 | HAVE_WCSRCHR=1; AC_SUBST([HAVE_WCSRCHR]) | |
204 | HAVE_WCSCSPN=1; AC_SUBST([HAVE_WCSCSPN]) | |
205 | HAVE_WCSSPN=1; AC_SUBST([HAVE_WCSSPN]) | |
206 | HAVE_WCSPBRK=1; AC_SUBST([HAVE_WCSPBRK]) | |
207 | HAVE_WCSSTR=1; AC_SUBST([HAVE_WCSSTR]) | |
208 | HAVE_WCSTOK=1; AC_SUBST([HAVE_WCSTOK]) | |
209 | HAVE_WCSWIDTH=1; AC_SUBST([HAVE_WCSWIDTH]) | |
210 | HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB]) | |
211 | HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH]) | |
212 | REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T]) | |
213 | REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC]) | |
214 | REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB]) | |
215 | REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT]) | |
216 | REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC]) | |
217 | REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN]) | |
218 | REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS]) | |
219 | REPLACE_MBSNRTOWCS=0; AC_SUBST([REPLACE_MBSNRTOWCS]) | |
220 | REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB]) | |
221 | REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS]) | |
222 | REPLACE_WCSNRTOMBS=0; AC_SUBST([REPLACE_WCSNRTOMBS]) | |
223 | REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH]) | |
224 | REPLACE_WCSWIDTH=0; AC_SUBST([REPLACE_WCSWIDTH]) | |
225 | ]) |