Avoid warning at configure time with "gcc -Wall".

[gnulib.git] / m4 / mbswidth.m4

diff --git a/m4/mbswidth.m4 b/m4/mbswidth.m4
index f61be10..5aff74e 100644 (file)
--- a/m4/mbswidth.m4
+++ b/m4/mbswidth.m4
@@ -1,37 +1,19 @@
-#serial 11
+# mbswidth.m4 serial 13
+dnl Copyright (C) 2000-2002, 2004, 2006 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
 dnl From Bruno Haible.
 
 AC_DEFUN([gl_MBSWIDTH],
 [
-  AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
-  AC_CHECK_FUNCS_ONCE(isascii iswprint mbsinit)
-  AC_CHECK_FUNCS(iswcntrl wcwidth)
+  AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
+  AC_CHECK_FUNCS_ONCE([isascii mbsinit])
+  AC_CHECK_FUNCS([iswcntrl])
   gl_FUNC_MBRTOWC
 
-  AC_CACHE_CHECK([whether wcwidth is declared], ac_cv_have_decl_wcwidth,
-    [AC_TRY_COMPILE([
-/* 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.])
-
   dnl UnixWare 7.1.1 <wchar.h> has a declaration of a function mbswidth()
   dnl that clashes with ours.
   AC_CACHE_CHECK([whether mbswidth is declared in <wchar.h>],
@@ -42,6 +24,7 @@ AC_DEFUN([gl_MBSWIDTH],
 #endif
 ], [
   char *p = (char *) mbswidth;
+  return !p;
 ], ac_cv_have_decl_mbswidth=yes, ac_cv_have_decl_mbswidth=no)])
   if test $ac_cv_have_decl_mbswidth = yes; then
     ac_val=1