| 1 | dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues. |
| 2 | |
| 3 | dnl Copyright (C) 2007-2014 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 | ]) |