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-rw-r--r--m4/glibc2.m430
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diff --git a/m4/glibc2.m4 b/m4/glibc2.m4
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+# glibc2.m4 serial 1
+dnl Copyright (C) 2000-2002, 2004 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.
+
+# Test for the GNU C Library, version 2.0 or newer.
+# From Bruno Haible.
+
+AC_DEFUN([gt_GLIBC2],
+ [
+ AC_CACHE_CHECK(whether we are using the GNU C Library 2 or newer,
+ ac_cv_gnu_library_2,
+ [AC_EGREP_CPP([Lucky GNU user],
+ [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2)
+ Lucky GNU user
+ #endif
+#endif
+ ],
+ ac_cv_gnu_library_2=yes,
+ ac_cv_gnu_library_2=no)
+ ]
+ )
+ AC_SUBST(GLIBC2)
+ GLIBC2="$ac_cv_gnu_library_2"
+ ]
+)