X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fwcwidth.m4;h=b4834991a5576744dacad930a292bcf6a18f7812;hb=876405426e971f914da0645ea9f3810ad62ef667;hp=01e554409c33aa69a25c24e86e6a9b1e2dec0e9c;hpb=f5e6e9801a33eda719a723fcae8244e2fe25a056;p=gnulib.git

diff --git a/m4/wcwidth.m4 b/m4/wcwidth.m4
index 01e554409..b4834991a 100644
--- a/m4/wcwidth.m4
+++ b/m4/wcwidth.m4
@@ -1,37 +1,30 @@
-# wcwidth.m4 serial 1
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+# wcwidth.m4 serial 8
+dnl Copyright (C) 2006, 2007 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 autoconf tests required for use of mbswidth.c
-
 AC_DEFUN([gl_FUNC_WCWIDTH],
-[ AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
-  AC_CHECK_FUNCS_ONCE([iswprint wcwidth])
-
+[
+  dnl Persuade glibc <wchar.h> to declare wcwidth().
   AC_REQUIRE([AC_GNU_SOURCE])
 
-  AC_CACHE_CHECK([whether wcwidth is declared], [ac_cv_have_decl_wcwidth],
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+  AC_REQUIRE([AC_C_INLINE])
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+
+  AC_CHECK_HEADERS_ONCE([wchar.h])
+  AC_CHECK_FUNCS_ONCE([wcwidth])
+
+  AC_CHECK_DECLS([wcwidth], [], [], [
 /* AIX 3.2.5 declares wcwidth in <string.h>. */
-#if HAVE_STRING_H
-# include <string.h>
-#endif
-#if HAVE_WCHAR_H
-# include <wchar.h>
-#endif
-], [
-#ifndef wcwidth
-  char *p = (char *) wcwidth;
-#endif
-])], [ac_cv_have_decl_wcwidth=yes], [ac_cv_have_decl_wcwidth=no])])
-  if test $ac_cv_have_decl_wcwidth = yes; then
-    ac_val=1
-  else
-    ac_val=0
-  fi
-  AC_DEFINE_UNQUOTED([HAVE_DECL_WCWIDTH], [$ac_val],
-    [Define to 1 if you have the declaration of wcwidth(), and to 0
-     otherwise.])
-]) 
+#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>
+])])