| 1 | dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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| 2 |
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| 3 | dnl Copyright (C) 2007-2012 Free Software Foundation, Inc.
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| 4 | dnl This file is free software; the Free Software Foundation
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| 5 | dnl gives unlimited permission to copy and/or distribute it,
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| 6 | dnl with or without modifications, as long as this notice is preserved.
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| 7 |
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| 8 | dnl Written by Eric Blake.
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| 9 |
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| 10 | # wchar_h.m4 serial 39
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| 11 |
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| 12 | AC_DEFUN([gl_WCHAR_H],
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| 13 | [
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| 14 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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| 15 | AC_REQUIRE([gl_WCHAR_H_INLINE_OK])
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| 16 | dnl Prepare for creating substitute <wchar.h>.
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| 17 | dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
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| 18 | dnl character support).
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| 19 | dnl <wchar.h> is always overridden, because of GNULIB_POSIXCHECK.
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| 20 | gl_CHECK_NEXT_HEADERS([wchar.h])
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| 21 | if test $ac_cv_header_wchar_h = yes; then
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| 22 | HAVE_WCHAR_H=1
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| 23 | else
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| 24 | HAVE_WCHAR_H=0
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| 25 | fi
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| 26 | AC_SUBST([HAVE_WCHAR_H])
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| 27 |
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| 28 | AC_REQUIRE([gl_FEATURES_H])
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| 29 |
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| 30 | AC_REQUIRE([gt_TYPE_WINT_T])
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| 31 | if test $gt_cv_c_wint_t = yes; then
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| 32 | HAVE_WINT_T=1
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| 33 | else
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| 34 | HAVE_WINT_T=0
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| 35 | fi
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| 36 | AC_SUBST([HAVE_WINT_T])
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| 37 |
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| 38 | dnl Check for declarations of anything we want to poison if the
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| 39 | dnl corresponding gnulib module is not in use.
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| 40 | gl_WARN_ON_USE_PREPARE([[
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| 41 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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| 42 | <wchar.h>.
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| 43 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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| 44 | included before <wchar.h>. */
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| 45 | #if !(defined __GLIBC__ && !defined __UCLIBC__)
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| 46 | # include <stddef.h>
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| 47 | # include <stdio.h>
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| 48 | # include <time.h>
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| 49 | #endif
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| 50 | #include <wchar.h>
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| 51 | ]],
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| 52 | [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb
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| 53 | wcsrtombs wcsnrtombs wcwidth wmemchr wmemcmp wmemcpy wmemmove wmemset
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| 54 | wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat wcscmp
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| 55 | wcsncmp wcscasecmp wcsncasecmp wcscoll wcsxfrm wcsdup wcschr wcsrchr
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| 56 | wcscspn wcsspn wcspbrk wcsstr wcstok wcswidth
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| 57 | ])
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| 58 | ])
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| 59 |
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| 60 | dnl Check whether <wchar.h> is usable at all.
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| 61 | AC_DEFUN([gl_WCHAR_H_INLINE_OK],
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| 62 | [
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| 63 | dnl Test whether <wchar.h> suffers due to the transition from '__inline' to
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| 64 | dnl 'gnu_inline'. See <http://sourceware.org/bugzilla/show_bug.cgi?id=4022>
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| 65 | dnl and <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary,
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| 66 | dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and
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| 67 | dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>.
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| 68 | AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly],
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| 69 | [gl_cv_header_wchar_h_correct_inline],
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| 70 | [gl_cv_header_wchar_h_correct_inline=yes
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| 71 | AC_LANG_CONFTEST([
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| 72 | AC_LANG_SOURCE([[#define wcstod renamed_wcstod
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| 73 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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| 74 | <wchar.h>.
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| 75 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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| 76 | included before <wchar.h>. */
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| 77 | #include <stddef.h>
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| 78 | #include <stdio.h>
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| 79 | #include <time.h>
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| 80 | #include <wchar.h>
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| 81 | extern int zero (void);
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| 82 | int main () { return zero(); }
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| 83 | ]])])
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| 84 | if AC_TRY_EVAL([ac_compile]); then
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| 85 | mv conftest.$ac_objext conftest1.$ac_objext
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| 86 | AC_LANG_CONFTEST([
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| 87 | AC_LANG_SOURCE([[#define wcstod renamed_wcstod
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| 88 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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| 89 | <wchar.h>.
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| 90 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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| 91 | included before <wchar.h>. */
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| 92 | #include <stddef.h>
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| 93 | #include <stdio.h>
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| 94 | #include <time.h>
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| 95 | #include <wchar.h>
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| 96 | int zero (void) { return 0; }
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| 97 | ]])])
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| 98 | if AC_TRY_EVAL([ac_compile]); then
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| 99 | mv conftest.$ac_objext conftest2.$ac_objext
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| 100 | if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
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| 101 | :
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| 102 | else
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| 103 | gl_cv_header_wchar_h_correct_inline=no
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| 104 | fi
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| 105 | fi
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| 106 | fi
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| 107 | rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext
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| 108 | ])
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| 109 | if test $gl_cv_header_wchar_h_correct_inline = no; then
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| 110 | AC_MSG_ERROR([<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS).
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| 111 | This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in
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| 112 | C99 mode. You have four options:
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| 113 | - Add the flag -fgnu89-inline to CC and reconfigure, or
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| 114 | - Fix your include files, using parts of
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| 115 | <http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or
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| 116 | - Use a gcc version older than 4.3, or
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| 117 | - Don't use the flags -std=c99 or -std=gnu99.
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| 118 | Configuration aborted.])
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| 119 | fi
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| 120 | ])
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| 121 |
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| 122 | AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
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| 123 | [
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| 124 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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| 125 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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| 126 | gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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| 127 | dnl Define it also as a C macro, for the benefit of the unit tests.
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| 128 | gl_MODULE_INDICATOR_FOR_TESTS([$1])
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| 129 | ])
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| 130 |
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| 131 | AC_DEFUN([gl_WCHAR_H_DEFAULTS],
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| 132 | [
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| 133 | GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
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| 134 | GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
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| 135 | GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
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| 136 | GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC])
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| 137 | GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN])
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| 138 | GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS])
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| 139 | GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
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| 140 | GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB])
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| 141 | GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS])
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| 142 | GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
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| 143 | GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
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| 144 | GNULIB_WMEMCHR=0; AC_SUBST([GNULIB_WMEMCHR])
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| 145 | GNULIB_WMEMCMP=0; AC_SUBST([GNULIB_WMEMCMP])
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| 146 | GNULIB_WMEMCPY=0; AC_SUBST([GNULIB_WMEMCPY])
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| 147 | GNULIB_WMEMMOVE=0; AC_SUBST([GNULIB_WMEMMOVE])
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| 148 | GNULIB_WMEMSET=0; AC_SUBST([GNULIB_WMEMSET])
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| 149 | GNULIB_WCSLEN=0; AC_SUBST([GNULIB_WCSLEN])
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| 150 | GNULIB_WCSNLEN=0; AC_SUBST([GNULIB_WCSNLEN])
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| 151 | GNULIB_WCSCPY=0; AC_SUBST([GNULIB_WCSCPY])
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| 152 | GNULIB_WCPCPY=0; AC_SUBST([GNULIB_WCPCPY])
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| 153 | GNULIB_WCSNCPY=0; AC_SUBST([GNULIB_WCSNCPY])
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| 154 | GNULIB_WCPNCPY=0; AC_SUBST([GNULIB_WCPNCPY])
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| 155 | GNULIB_WCSCAT=0; AC_SUBST([GNULIB_WCSCAT])
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| 156 | GNULIB_WCSNCAT=0; AC_SUBST([GNULIB_WCSNCAT])
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| 157 | GNULIB_WCSCMP=0; AC_SUBST([GNULIB_WCSCMP])
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| 158 | GNULIB_WCSNCMP=0; AC_SUBST([GNULIB_WCSNCMP])
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| 159 | GNULIB_WCSCASECMP=0; AC_SUBST([GNULIB_WCSCASECMP])
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| 160 | GNULIB_WCSNCASECMP=0; AC_SUBST([GNULIB_WCSNCASECMP])
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| 161 | GNULIB_WCSCOLL=0; AC_SUBST([GNULIB_WCSCOLL])
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| 162 | GNULIB_WCSXFRM=0; AC_SUBST([GNULIB_WCSXFRM])
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| 163 | GNULIB_WCSDUP=0; AC_SUBST([GNULIB_WCSDUP])
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| 164 | GNULIB_WCSCHR=0; AC_SUBST([GNULIB_WCSCHR])
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| 165 | GNULIB_WCSRCHR=0; AC_SUBST([GNULIB_WCSRCHR])
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| 166 | GNULIB_WCSCSPN=0; AC_SUBST([GNULIB_WCSCSPN])
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| 167 | GNULIB_WCSSPN=0; AC_SUBST([GNULIB_WCSSPN])
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| 168 | GNULIB_WCSPBRK=0; AC_SUBST([GNULIB_WCSPBRK])
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| 169 | GNULIB_WCSSTR=0; AC_SUBST([GNULIB_WCSSTR])
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| 170 | GNULIB_WCSTOK=0; AC_SUBST([GNULIB_WCSTOK])
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| 171 | GNULIB_WCSWIDTH=0; AC_SUBST([GNULIB_WCSWIDTH])
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| 172 | dnl Assume proper GNU behavior unless another module says otherwise.
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| 173 | HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
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| 174 | HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
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| 175 | HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
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| 176 | HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
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| 177 | HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
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| 178 | HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
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| 179 | HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
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| 180 | HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
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| 181 | HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
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| 182 | HAVE_WMEMCHR=1; AC_SUBST([HAVE_WMEMCHR])
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| 183 | HAVE_WMEMCMP=1; AC_SUBST([HAVE_WMEMCMP])
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| 184 | HAVE_WMEMCPY=1; AC_SUBST([HAVE_WMEMCPY])
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| 185 | HAVE_WMEMMOVE=1; AC_SUBST([HAVE_WMEMMOVE])
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| 186 | HAVE_WMEMSET=1; AC_SUBST([HAVE_WMEMSET])
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| 187 | HAVE_WCSLEN=1; AC_SUBST([HAVE_WCSLEN])
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| 188 | HAVE_WCSNLEN=1; AC_SUBST([HAVE_WCSNLEN])
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| 189 | HAVE_WCSCPY=1; AC_SUBST([HAVE_WCSCPY])
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| 190 | HAVE_WCPCPY=1; AC_SUBST([HAVE_WCPCPY])
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| 191 | HAVE_WCSNCPY=1; AC_SUBST([HAVE_WCSNCPY])
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| 192 | HAVE_WCPNCPY=1; AC_SUBST([HAVE_WCPNCPY])
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| 193 | HAVE_WCSCAT=1; AC_SUBST([HAVE_WCSCAT])
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| 194 | HAVE_WCSNCAT=1; AC_SUBST([HAVE_WCSNCAT])
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| 195 | HAVE_WCSCMP=1; AC_SUBST([HAVE_WCSCMP])
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| 196 | HAVE_WCSNCMP=1; AC_SUBST([HAVE_WCSNCMP])
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| 197 | HAVE_WCSCASECMP=1; AC_SUBST([HAVE_WCSCASECMP])
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| 198 | HAVE_WCSNCASECMP=1; AC_SUBST([HAVE_WCSNCASECMP])
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| 199 | HAVE_WCSCOLL=1; AC_SUBST([HAVE_WCSCOLL])
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| 200 | HAVE_WCSXFRM=1; AC_SUBST([HAVE_WCSXFRM])
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| 201 | HAVE_WCSDUP=1; AC_SUBST([HAVE_WCSDUP])
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| 202 | HAVE_WCSCHR=1; AC_SUBST([HAVE_WCSCHR])
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| 203 | HAVE_WCSRCHR=1; AC_SUBST([HAVE_WCSRCHR])
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| 204 | HAVE_WCSCSPN=1; AC_SUBST([HAVE_WCSCSPN])
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| 205 | HAVE_WCSSPN=1; AC_SUBST([HAVE_WCSSPN])
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| 206 | HAVE_WCSPBRK=1; AC_SUBST([HAVE_WCSPBRK])
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| 207 | HAVE_WCSSTR=1; AC_SUBST([HAVE_WCSSTR])
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| 208 | HAVE_WCSTOK=1; AC_SUBST([HAVE_WCSTOK])
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| 209 | HAVE_WCSWIDTH=1; AC_SUBST([HAVE_WCSWIDTH])
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| 210 | HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
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| 211 | HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
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| 212 | REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
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| 213 | REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC])
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| 214 | REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
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| 215 | REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
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| 216 | REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
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| 217 | REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
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| 218 | REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
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| 219 | REPLACE_MBSNRTOWCS=0; AC_SUBST([REPLACE_MBSNRTOWCS])
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| 220 | REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
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| 221 | REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
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| 222 | REPLACE_WCSNRTOMBS=0; AC_SUBST([REPLACE_WCSNRTOMBS])
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| 223 | REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
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| 224 | REPLACE_WCSWIDTH=0; AC_SUBST([REPLACE_WCSWIDTH])
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| 225 | ])
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