2 dnl Copyright (C) 2000, 2001, 2002, 2004, 2008, 2009 Free Software
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 # Test for the GNU C Library, version 2.1 or newer.
11 AC_DEFUN([gl_GLIBC21],
13 AC_CACHE_CHECK([whether we are using the GNU C Library 2.1 or newer],
14 [ac_cv_gnu_library_2_1],
15 [AC_EGREP_CPP([Lucky GNU user],
18 #ifdef __GNU_LIBRARY__
19 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
24 [ac_cv_gnu_library_2_1=yes],
25 [ac_cv_gnu_library_2_1=no])
29 GLIBC21="$ac_cv_gnu_library_2_1"