X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fwctype.m4;h=b611ebbc9b26e43ad901c36aa1b4985453fdf0b3;hb=6da2fb7a5a1e8a32ccd2f735834713a3bc8c4275;hp=7c6718c3e14e38fde512e3ce67d02b06aa39255f;hpb=5feb6a2ef2c57b51ebe76ed8a173cd1acc77b4bc;p=gnulib.git

diff --git a/m4/wctype.m4 b/m4/wctype.m4
index 7c6718c3e..b611ebbc9 100644
--- a/m4/wctype.m4
+++ b/m4/wctype.m4
@@ -1,6 +1,8 @@
+# wctype.m4 serial 4
+
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
 
-dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2009 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.
@@ -10,6 +12,7 @@ dnl Written by Paul Eggert.
 AC_DEFUN([gl_WCTYPE_H],
 [
   AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
   AC_CHECK_FUNCS_ONCE([iswcntrl])
   if test $ac_cv_func_iswcntrl = yes; then
     HAVE_ISWCNTRL=1
@@ -35,23 +38,31 @@ AC_DEFUN([gl_WCTYPE_H],
       dnl The other functions are likely broken in the same way.
       AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
         [
-          AC_TRY_RUN([#include <stddef.h>
-                      #include <stdio.h>
-                      #include <time.h>
-                      #include <wchar.h>
-                      #include <wctype.h>
-                      int main () { return iswprint ('x') == 0; }],
-            [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
-        ],
-        [
-          AC_TRY_COMPILE([#include <stdlib.h>
+          AC_RUN_IFELSE([AC_LANG_SOURCE([[
+                            #include <stddef.h>
+                            #include <stdio.h>
+                            #include <time.h>
+                            #include <wchar.h>
+                            #include <wctype.h>
+                            int main () { return iswprint ('x') == 0; }]])],
+            [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
+            [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
                           #if __GNU_LIBRARY__ == 1
                           Linux libc5 i18n is broken.
-                          #endif],
-            [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
+                          #endif]], [])],
+              [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
+            ])
         ])
       if test $gl_cv_func_iswcntrl_works = yes; then
-        WCTYPE_H=
+        case "$host_os" in
+          mingw*)
+            dnl On mingw, towlower and towupper return random high 16 bits.
+            ;;
+          *)
+            dnl iswcntrl works. towlower and towupper work as well.
+            WCTYPE_H=
+            ;;
+        esac
       fi
     fi
     dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,