X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fmbrtowc.m4;h=4c9f38861c62cdc2383dc81ffeabd621a2761a3c;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=b9e01e7a0e95d43f7fe865c41e5de8ba4fd70711;hpb=a19f3c61749d1f59e65c177098c0ffa4106ef65e;p=gnulib.git

diff --git a/m4/mbrtowc.m4 b/m4/mbrtowc.m4
index b9e01e7a0..4c9f38861 100644
--- a/m4/mbrtowc.m4
+++ b/m4/mbrtowc.m4
@@ -1,5 +1,5 @@
-# mbrtowc.m4 serial 24
-dnl Copyright (C) 2001-2002, 2004-2005, 2008-2011 Free Software Foundation,
+# mbrtowc.m4 serial 25
+dnl Copyright (C) 2001-2002, 2004-2005, 2008-2013 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,6 +15,22 @@ AC_DEFUN([gl_FUNC_MBRTOWC],
   AC_CHECK_FUNCS_ONCE([mbrtowc])
   if test $ac_cv_func_mbrtowc = no; then
     HAVE_MBRTOWC=0
+    AC_CHECK_DECLS([mbrtowc],,, [[
+/* 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_mbrtowc = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares mbrtowc() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_MBRTOWC=1
+    fi
   else
     if test $REPLACE_MBSTATE_T = 1; then
       REPLACE_MBRTOWC=1