dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2011 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.
dnl Written by Eric Blake.
-# wchar_h.m4 serial 33
+# wchar_h.m4 serial 37
AC_DEFUN([gl_WCHAR_H],
[
dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
dnl character support).
dnl <wchar.h> is always overridden, because of GNULIB_POSIXCHECK.
- AC_CHECK_HEADERS_ONCE([wchar.h])
gl_CHECK_NEXT_HEADERS([wchar.h])
if test $ac_cv_header_wchar_h = yes; then
HAVE_WCHAR_H=1
fi
AC_SUBST([HAVE_WCHAR_H])
+ AC_REQUIRE([gl_FEATURES_H])
+
AC_REQUIRE([gt_TYPE_WINT_T])
if test $gt_cv_c_wint_t = yes; then
HAVE_WINT_T=1
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[
-/* Some systems require additional headers. */
-#ifndef __GLIBC__
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
+ included before <wchar.h>. */
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
# include <stddef.h>
# include <stdio.h>
# include <time.h>
[gl_cv_header_wchar_h_correct_inline=yes
AC_LANG_CONFTEST([
AC_LANG_SOURCE([[#define wcstod renamed_wcstod
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
+ included before <wchar.h>. */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
#include <wchar.h>
extern int zero (void);
int main () { return zero(); }
mv conftest.$ac_objext conftest1.$ac_objext
AC_LANG_CONFTEST([
AC_LANG_SOURCE([[#define wcstod renamed_wcstod
+/* 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>
int zero (void) { return 0; }
]])])