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# wcrtomb.m4 serial 16
dnl Copyright (C) 2008-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_WCRTOMB],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_REQUIRE([AC_TYPE_MBSTATE_T])
gl_MBSTATE_T_BROKEN
AC_CHECK_FUNCS_ONCE([wcrtomb])
if test $ac_cv_func_wcrtomb = no; then
HAVE_WCRTOMB=0
AC_CHECK_DECLS([wcrtomb],,, [[
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
included before <wchar.h>. */
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <wchar.h>
]])
if test $ac_cv_have_decl_wcrtomb = yes; then
dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
dnl it does not have the function. Avoid a collision with gnulib's
dnl replacement.
REPLACE_WCRTOMB=1
fi
else
dnl We don't actually need to override wcrtomb when redefining the semantics
dnl of the mbstate_t type. Tested on 32-bit AIX.
dnl if test $REPLACE_MBSTATE_T = 1; then
dnl REPLACE_WCRTOMB=1
dnl fi
if test $REPLACE_WCRTOMB = 0; then
dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
dnl sometimes returns 0 instead of 1.
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gt_LOCALE_FR])
AC_REQUIRE([gt_LOCALE_FR_UTF8])
AC_REQUIRE([gt_LOCALE_JA])
AC_REQUIRE([gt_LOCALE_ZH_CN])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether wcrtomb works in the C locale],
[gl_cv_func_wcrtomb_works],
[AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <string.h>
#include <stdlib.h>
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
included before <wchar.h>. */
#include <stddef.h>
#include <stdio.h>
#include <wchar.h>
int main ()
{
mbstate_t state;
char out[64];
int count;
memset (&state, 0, sizeof (state));
out[0] = 'x';
count = wcrtomb (out, L'a', &state);
return !(count == 1 && out[0] == 'a');
}]])],
[gl_cv_func_wcrtomb_works=yes],
[gl_cv_func_wcrtomb_works=no],
[case "$host_os" in
# Guess no on Android.
linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
# Guess yes otherwise.
*) gl_cv_func_wcrtomb_works="guessing yes";;
esac
])
])
case "$gl_cv_func_wcrtomb_works" in
*yes) ;;
*) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1],
[Define if the wcrtomb function does not work in the C locale.])
REPLACE_WCRTOMB=1 ;;
esac
fi
if test $REPLACE_WCRTOMB = 0; then
AC_CACHE_CHECK([whether wcrtomb return value is correct],
[gl_cv_func_wcrtomb_retval],
[
dnl Initial guess, used when cross-compiling or when no suitable locale
dnl is present.
changequote(,)dnl
case "$host_os" in
# Guess no on AIX 4, OSF/1, Solaris, native Windows.
aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
# Guess yes otherwise.
*) gl_cv_func_wcrtomb_retval="guessing yes" ;;
esac
changequote([,])dnl
if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <string.h>
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
included before <wchar.h>. */
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <wchar.h>
#include <stdlib.h>
int main ()
{
int result = 0;
if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
{
if (wcrtomb (NULL, 0, NULL) != 1)
result |= 1;
}
if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
{
if (wcrtomb (NULL, 0, NULL) != 1)
result |= 2;
{
wchar_t wc = (wchar_t) 0xBADFACE;
if (mbtowc (&wc, "\303\274", 2) == 2)
if (wcrtomb (NULL, wc, NULL) != 1)
result |= 2;
}
}
if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
{
if (wcrtomb (NULL, 0, NULL) != 1)
result |= 4;
}
if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
{
if (wcrtomb (NULL, 0, NULL) != 1)
result |= 8;
}
return result;
}]])],
[gl_cv_func_wcrtomb_retval=yes],
[gl_cv_func_wcrtomb_retval=no],
[:])
fi
])
case "$gl_cv_func_wcrtomb_retval" in
*yes) ;;
*) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1],
[Define if the wcrtomb function has an incorrect return value.])
REPLACE_WCRTOMB=1 ;;
esac
fi
fi
])
# Prerequisites of lib/wcrtomb.c.
AC_DEFUN([gl_PREREQ_WCRTOMB], [
:
])
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