X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fduplocale.m4;h=4393d82dfb6780348d3b10ff06d4ad56f2b5ee9a;hb=b58d8aacabf74bae9e628f924474f2038c18a9df;hp=a444bfc52222bdbf2b00449e7e77bf0a744891b3;hpb=f4aa39b61508a65deafbd6d7fea752d7a989ce24;p=gnulib.git

diff --git a/m4/duplocale.m4 b/m4/duplocale.m4
index a444bfc52..4393d82df 100644
--- a/m4/duplocale.m4
+++ b/m4/duplocale.m4
@@ -1,5 +1,5 @@
-# duplocale.m4 serial 2
-dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# duplocale.m4 serial 5
+dnl Copyright (C) 2009-2011 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.
@@ -12,30 +12,45 @@ AC_DEFUN([gl_FUNC_DUPLOCALE],
   if test $ac_cv_func_duplocale = yes; then
     dnl Check against glibc bug where duplocale crashes.
     dnl See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
+    dnl Also, on AIX 7.1, duplocale(LC_GLOBAL_LOCALE) returns (locale_t)0 with
+    dnl errno set to EINVAL.
     AC_REQUIRE([gl_LOCALE_H])
     AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
       [gl_cv_func_duplocale_works],
-      [AC_TRY_RUN([
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE([[
 #include <locale.h>
 #if HAVE_XLOCALE_H
 # include <xlocale.h>
 #endif
 int main ()
 {
-  (void) duplocale (LC_GLOBAL_LOCALE);
+  if (duplocale (LC_GLOBAL_LOCALE) == (locale_t)0)
+    return 1;
   return 0;
-}], [gl_cv_func_duplocale_works=yes], [gl_cv_func_duplocale_works=no],
-         [dnl Guess it works except on glibc < 2.12.
-          AC_EGREP_CPP([Unlucky GNU user], [
+}]])],
+         [gl_cv_func_duplocale_works=yes],
+         [gl_cv_func_duplocale_works=no],
+         [dnl Guess it works except on glibc < 2.12, uClibc, and AIX.
+          case "$host_os" in
+            aix*) gl_cv_func_duplocale_works="guessing no";;
+            *-gnu*)
+              AC_EGREP_CPP([Unlucky], [
 #include <features.h>
 #ifdef __GNU_LIBRARY__
  #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
   Unlucky GNU user
  #endif
 #endif
-            ],
-            [gl_cv_func_duplocale_works="guessing no"],
-            [gl_cv_func_duplocale_works="guessing yes"])
+#ifdef __UCLIBC__
+ Unlucky user
+#endif
+                ],
+                [gl_cv_func_duplocale_works="guessing no"],
+                [gl_cv_func_duplocale_works="guessing yes"])
+              ;;
+            *) gl_cv_func_duplocale_works="guessing yes";;
+          esac
          ])
       ])
     case "$gl_cv_func_duplocale_works" in