1# glibc21.m4 serial 4 2dnl Copyright (C) 2000-2002, 2004, 2008-2010 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7# Test for the GNU C Library, version 2.1 or newer. 8# From Bruno Haible. 9 10AC_DEFUN([gl_GLIBC21], 11 [ 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], 15 [ 16#include <features.h> 17#ifdef __GNU_LIBRARY__ 18 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2) 19 Lucky GNU user 20 #endif 21#endif 22 ], 23 [ac_cv_gnu_library_2_1=yes], 24 [ac_cv_gnu_library_2_1=no]) 25 ] 26 ) 27 AC_SUBST([GLIBC21]) 28 GLIBC21="$ac_cv_gnu_library_2_1" 29 ] 30) 31