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-rw-r--r--m4/wcrtomb.m4146
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diff --git a/m4/wcrtomb.m4 b/m4/wcrtomb.m4
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+# wcrtomb.m4 serial 17
+dnl Copyright (C) 2008-2022 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],,, [[
+ #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 $REPLACE_WCRTOMB = 0; then
+ dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
+ dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
+ dnl sometimes returns 0 instead of 1.
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([gt_LOCALE_FR])
+ AC_REQUIRE([gt_LOCALE_FR_UTF8])
+ AC_REQUIRE([gt_LOCALE_JA])
+ AC_REQUIRE([gt_LOCALE_ZH_CN])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether wcrtomb works in the C locale],
+ [gl_cv_func_wcrtomb_works],
+ [AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <string.h>
+#include <stdlib.h>
+#include <wchar.h>
+int main ()
+{
+ mbstate_t state;
+ char out[64];
+ int count;
+ memset (&state, 0, sizeof (state));
+ out[0] = 'x';
+ count = wcrtomb (out, L'a', &state);
+ return !(count == 1 && out[0] == 'a');
+}]])],
+ [gl_cv_func_wcrtomb_works=yes],
+ [gl_cv_func_wcrtomb_works=no],
+ [case "$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 $LOCALE_ZH_CN != none; then
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdlib.h>
+int main ()
+{
+ int result = 0;
+ if (setlocale (LC_ALL, "$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], [
+ :
+])