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diff m4/wctype.m4 @ 7733:9d60f39f35c1

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* MODULES.html.sh: New module wctype. * lib/wctype_.h, m4/wctype.m4, modules/wctype: New files. * lib/fnmatch.c: Don't bother to include <wchar.h> before <wctype.h>, since the new wctype module should fix this. * lib/quotearg.c: Include <wctype.h> unconditionally, since the wctype module should arrange for it. * lib/regex_internal.h: Likewise. * m4/quotearg.m4 (gl_QUOTEARG): Don't check for wctype.h or iswprint, since the wctype module should handle this now. * m4/regex.m4 (gl_PREREQ_REGEX): Don't check for wctype.h. * modules/fnmatch (Depends-on): Add wctype. * modules/quotearg (Depends-on): Likewise. * modules/regex (Depends-on): Likewise.
author Paul Eggert <eggert@cs.ucla.edu>
date Fri, 22 Dec 2006 00:21:54 +0000
parents
children 14932dd36171
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+dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
+
+dnl Copyright (C) 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 Written by Paul Eggert.
+
+AC_DEFUN([gl_WCTYPE_H],
+[
+  AC_CHECK_FUNCS_ONCE([iswcntrl])
+  AC_CHECK_HEADERS_ONCE([wctype.h])
+  AC_REQUIRE([AC_C_INLINE])
+
+  if test $ac_cv_header_wctype_h = yes; then
+    gl_ABSOLUTE_HEADER([wctype.h])
+    ABSOLUTE_WCTYPE_H=\"$gl_cv_absolute_wctype_h\"
+    HAVE_WCTYPE_H=1
+  else
+    ABSOLUTE_WCTYPE_H=\"no/such/file/wctype.h\"
+    HAVE_WCTYPE_H=0
+  fi
+  AC_SUBST([ABSOLUTE_WCTYPE_H])
+  AC_SUBST([HAVE_WCTYPE_H])
+
+  WCTYPE_H=wctype.h
+  HAVE_WCTYPE_CTMP_BUG=0
+  if test $ac_cv_header_wctype_h = yes; then
+    AC_CACHE_CHECK([whether wctype macros need _ctmp_ declared],
+      [gl_cv_wctype_ctmp_bug],
+      [gl_cv_wctype_ctmp_bug=no
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+	    [[#include <wctype.h>
+	    ]],
+	    [[return iswprint (0);]])],
+	 [gl_cv_wctype_ctmp_bug='no, but bare wctype.h does not work'],
+	 [AC_COMPILE_IFELSE(
+	    [AC_LANG_PROGRAM(
+	       [[#include <wctype.h>
+		 static wint_t _ctmp_;]],
+	       [[return iswprint (0);]])],
+	    [gl_cv_wctype_ctmp_bug=yes])])])
+    case $gl_cv_wctype_ctmp_bug,$ac_cv_func_iswcntrl in #(
+      yes,*)
+	HAVE_WCTYPE_CTMP_BUG=1;; #(
+      no,yes)
+	WCTYPE_H=;;
+    esac
+  fi
+  AC_SUBST([WCTYPE_H])
+  AC_SUBST([HAVE_WCTYPE_CTMP_BUG])
+])