1# wcrtomb.m4 serial 17 2dnl Copyright (C) 2008-2021 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 7AC_DEFUN([gl_FUNC_WCRTOMB], 8[ 9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) 10 11 AC_REQUIRE([AC_TYPE_MBSTATE_T]) 12 gl_MBSTATE_T_BROKEN 13 14 AC_CHECK_FUNCS_ONCE([wcrtomb]) 15 if test $ac_cv_func_wcrtomb = no; then 16 HAVE_WCRTOMB=0 17 AC_CHECK_DECLS([wcrtomb],,, [[ 18 #include <wchar.h> 19 ]]) 20 if test $ac_cv_have_decl_wcrtomb = yes; then 21 dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although 22 dnl it does not have the function. Avoid a collision with gnulib's 23 dnl replacement. 24 REPLACE_WCRTOMB=1 25 fi 26 else 27 dnl We don't actually need to override wcrtomb when redefining the semantics 28 dnl of the mbstate_t type. Tested on 32-bit AIX. 29 dnl if test $REPLACE_MBSTATE_T = 1; then 30 dnl REPLACE_WCRTOMB=1 31 dnl fi 32 if test $REPLACE_WCRTOMB = 0; then 33 dnl On Android 4.3, wcrtomb produces wrong characters in the C locale. 34 dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL) 35 dnl sometimes returns 0 instead of 1. 36 AC_REQUIRE([AC_PROG_CC]) 37 AC_REQUIRE([gt_LOCALE_FR]) 38 AC_REQUIRE([gt_LOCALE_FR_UTF8]) 39 AC_REQUIRE([gt_LOCALE_JA]) 40 AC_REQUIRE([gt_LOCALE_ZH_CN]) 41 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 42 AC_CACHE_CHECK([whether wcrtomb works in the C locale], 43 [gl_cv_func_wcrtomb_works], 44 [AC_RUN_IFELSE( 45 [AC_LANG_SOURCE([[ 46#include <string.h> 47#include <stdlib.h> 48#include <wchar.h> 49int main () 50{ 51 mbstate_t state; 52 char out[64]; 53 int count; 54 memset (&state, 0, sizeof (state)); 55 out[0] = 'x'; 56 count = wcrtomb (out, L'a', &state); 57 return !(count == 1 && out[0] == 'a'); 58}]])], 59 [gl_cv_func_wcrtomb_works=yes], 60 [gl_cv_func_wcrtomb_works=no], 61 [case "$host_os" in 62 # Guess no on Android. 63 linux*-android*) gl_cv_func_wcrtomb_works="guessing no";; 64 # Guess yes otherwise. 65 *) gl_cv_func_wcrtomb_works="guessing yes";; 66 esac 67 ]) 68 ]) 69 case "$gl_cv_func_wcrtomb_works" in 70 *yes) ;; 71 *) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1], 72 [Define if the wcrtomb function does not work in the C locale.]) 73 REPLACE_WCRTOMB=1 ;; 74 esac 75 fi 76 if test $REPLACE_WCRTOMB = 0; then 77 AC_CACHE_CHECK([whether wcrtomb return value is correct], 78 [gl_cv_func_wcrtomb_retval], 79 [ 80 dnl Initial guess, used when cross-compiling or when no suitable locale 81 dnl is present. 82changequote(,)dnl 83 case "$host_os" in 84 # Guess no on AIX 4, OSF/1, Solaris, native Windows. 85 aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;; 86 # Guess yes otherwise. 87 *) gl_cv_func_wcrtomb_retval="guessing yes" ;; 88 esac 89changequote([,])dnl 90 if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then 91 AC_RUN_IFELSE( 92 [AC_LANG_SOURCE([[ 93#include <locale.h> 94#include <string.h> 95#include <wchar.h> 96#include <stdlib.h> 97int main () 98{ 99 int result = 0; 100 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) 101 { 102 if (wcrtomb (NULL, 0, NULL) != 1) 103 result |= 1; 104 } 105 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) 106 { 107 if (wcrtomb (NULL, 0, NULL) != 1) 108 result |= 2; 109 { 110 wchar_t wc = (wchar_t) 0xBADFACE; 111 if (mbtowc (&wc, "\303\274", 2) == 2) 112 if (wcrtomb (NULL, wc, NULL) != 1) 113 result |= 2; 114 } 115 } 116 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) 117 { 118 if (wcrtomb (NULL, 0, NULL) != 1) 119 result |= 4; 120 } 121 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) 122 { 123 if (wcrtomb (NULL, 0, NULL) != 1) 124 result |= 8; 125 } 126 return result; 127}]])], 128 [gl_cv_func_wcrtomb_retval=yes], 129 [gl_cv_func_wcrtomb_retval=no], 130 [:]) 131 fi 132 ]) 133 case "$gl_cv_func_wcrtomb_retval" in 134 *yes) ;; 135 *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1], 136 [Define if the wcrtomb function has an incorrect return value.]) 137 REPLACE_WCRTOMB=1 ;; 138 esac 139 fi 140 fi 141]) 142 143# Prerequisites of lib/wcrtomb.c. 144AC_DEFUN([gl_PREREQ_WCRTOMB], [ 145 : 146]) 147