From 6f7ac74eb3222cbe4407901a63dc8af025684273 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Sat, 3 Jun 2000 08:23:54 +0000
Subject: [PATCH] New file.  From Bruno Haible.

---
 m4/glibc21.m4 | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 m4/glibc21.m4

diff --git a/m4/glibc21.m4 b/m4/glibc21.m4
new file mode 100644
index 0000000..dab3724
--- /dev/null
+++ b/m4/glibc21.m4
@@ -0,0 +1,25 @@
+#serial 1
+
+# 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_DEFINE_UNQUOTED(GLIBC21,$ac_cv_gnu_library_2_1)
+  ]
+)
-- 
2.7.4