1 files changed, 88 insertions, 0 deletions
diff --git a/gl/m4/wcrtomb.m4 b/gl/m4/wcrtomb.m4
new file mode 100644
index 00000000..22d94336
--- /dev/null
+++ b/gl/m4/wcrtomb.m4
@@ -0,0 +1,88 @@
+# wcrtomb.m4 serial 2
+dnl Copyright (C) 2008 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])
+  AC_CHECK_FUNCS_ONCE([wcrtomb])
+  if test $ac_cv_func_wcrtomb = no; then
+    HAVE_WCRTOMB=0
+  else
+
+    dnl On OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes
+    dnl returns 0 instead of 1.
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([gt_LOCALE_FR])
+    AC_REQUIRE([gt_LOCALE_FR_UTF8])
+    AC_REQUIRE([gt_LOCALE_JA])
+    AC_REQUIRE([gt_LOCALE_ZH_CN])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether wcrtomb return value is correct],
+      [gl_cv_func_wcrtomb_retval],
+      [
+        dnl Initial guess, used when cross-compiling or when no suitable locale
+        dnl is present.
+changequote(,)dnl
+        case "$host_os" in
+                           # Guess no on OSF/1 and Solaris.
+          osf* | solaris*) 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 $LOCALE_ZH_CN != none; then
+          AC_TRY_RUN([
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        return 1;
+    }
+  return 0;
+}],
+            [gl_cv_func_wcrtomb_retval=yes],
+            [gl_cv_func_wcrtomb_retval=no],
+            [])
+        fi
+      ])
+    case "$gl_cv_func_wcrtomb_retval" in
+      *yes) ;;
+      *) REPLACE_WCRTOMB=1 ;;
+    esac
+  fi
+  if test $HAVE_WCRTOMB = 0 || test $REPLACE_WCRTOMB = 1; then
+    gl_REPLACE_WCHAR_H
+    AC_LIBOBJ([wcrtomb])
+    gl_PREREQ_WCRTOMB
+  fi
+])
+
+# Prerequisites of lib/wcrtomb.c.
+AC_DEFUN([gl_PREREQ_WCRTOMB], [
+  :
+])