*** empty log message ***

[gnulib.git] / m4 / mbswidth.m4

diff --git a/m4/mbswidth.m4 b/m4/mbswidth.m4
index f49e571..878e531 100644 (file)
--- a/m4/mbswidth.m4
+++ b/m4/mbswidth.m4
@@ -1,20 +1,59 @@
-#serial 2
+# mbswidth.m4 serial 11
+dnl Copyright (C) 2000-2002, 2004 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.
 
 
 dnl autoconf tests required for use of mbswidth.c
 dnl From Bruno Haible.
 

-AC_DEFUN(jm_PREREQ_MBSWIDTH,
+AC_DEFUN([gl_MBSWIDTH],

 [
 [

-  AC_REQUIRE([AC_HEADER_STDC])
-  AC_REQUIRE([AM_C_PROTOTYPES])
-  AC_CHECK_HEADERS(limits.h stdlib.h string.h wchar.h wctype.h)
-  AC_CHECK_FUNCS(isascii iswprint wcwidth)
-  jm_FUNC_MBRTOWC
-  headers='
-#     if HAVE_WCHAR_H
-#      include <wchar.h>
-#     endif
-'
-  AC_CHECK_DECLS([wcwidth], , , $headers)
-  AC_MBSTATE_T
+  AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
+  AC_CHECK_FUNCS_ONCE(isascii iswprint mbsinit)
+  AC_CHECK_FUNCS(iswcntrl wcwidth)
+  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>],
+    ac_cv_have_decl_mbswidth,
+    [AC_TRY_COMPILE([
+#if HAVE_WCHAR_H
+# include <wchar.h>
+#endif
+], [
+  char *p = (char *) mbswidth;
+], ac_cv_have_decl_mbswidth=yes, ac_cv_have_decl_mbswidth=no)])
+  if test $ac_cv_have_decl_mbswidth = yes; then
+    ac_val=1
+  else
+    ac_val=0
+  fi
+  AC_DEFINE_UNQUOTED(HAVE_DECL_MBSWIDTH_IN_WCHAR_H, $ac_val,
+    [Define to 1 if you have a declaration of mbswidth() in <wchar.h>, and to 0 otherwise.])
+
+  AC_TYPE_MBSTATE_T

 ])
 ])