From 2941ba22e667dadf49e4e6417a87dfc49819bde0 Mon Sep 17 00:00:00 2001
From: Ralph Giles <giles@xiph.org>
Date: Fri, 12 Jul 2002 16:24:54 +0000
Subject: [PATCH] Add the jm_GLIBC21 macro, required by AM_GNU_GETTEXT.

svn path=/trunk/vorbis-tools/; revision=3608
---
 acinclude.m4 | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/acinclude.m4 b/acinclude.m4
index 4fddd4e..b2901ed 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1078,3 +1078,32 @@ strdup strtoul tsearch __argz_count __argz_stringify __argz_next])
    INTL_LIBTOOL_SUFFIX_PREFIX=ifelse([$1], use-libtool, [l], [])
    AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
   ])
+
+dnl this check it required by the gettext macro
+#serial 2
+
+# Test for the GNU C Library, version 2.1 or newer.
+# From Bruno Haible.
+
+AC_DEFUN([jm_GLIBC21],
+  [
+    AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
+      ac_cv_gnu_library_2_1,
+      [AC_EGREP_CPP([Lucky GNU user],
+	[
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
+  Lucky GNU user
+ #endif
+#endif
+	],
+	ac_cv_gnu_library_2_1=yes,
+	ac_cv_gnu_library_2_1=no)
+      ]
+    )
+    AC_SUBST(GLIBC21)
+    GLIBC21="$ac_cv_gnu_library_2_1"
+  ]
+)
+
-- 
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