2 dnl Copyright (C) 2000-2002, 2004, 2008 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # Test for the GNU C Library, version 2.1 or newer.
10 AC_DEFUN([gl_GLIBC21],
12 AC_CACHE_CHECK([whether we are using the GNU C Library 2.1 or newer],
13 [ac_cv_gnu_library_2_1],
14 [AC_EGREP_CPP([Lucky GNU user],
17 #ifdef __GNU_LIBRARY__
18 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
23 [ac_cv_gnu_library_2_1=yes],
24 [ac_cv_gnu_library_2_1=no])
28 GLIBC21="$ac_cv_gnu_library_2_1"