1# glibc2.m4 serial 3
2dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2019 Free Software Foundation,
3dnl Inc.
4dnl This file is free software; the Free Software Foundation
5dnl gives unlimited permission to copy and/or distribute it,
6dnl with or without modifications, as long as this notice is preserved.
7
8# Test for the GNU C Library, version 2.0 or newer.
9# From Bruno Haible.
10
11AC_DEFUN([gt_GLIBC2],
12  [
13    AC_CACHE_CHECK([whether we are using the GNU C Library 2 or newer],
14      [ac_cv_gnu_library_2],
15      [AC_EGREP_CPP([Lucky GNU user],
16        [
17#include <features.h>
18#ifdef __GNU_LIBRARY__
19 #if (__GLIBC__ >= 2) && !defined __UCLIBC__
20  Lucky GNU user
21 #endif
22#endif
23        ],
24        [ac_cv_gnu_library_2=yes],
25        [ac_cv_gnu_library_2=no])
26      ]
27    )
28    AC_SUBST([GLIBC2])
29    GLIBC2="$ac_cv_gnu_library_2"
30  ]
31)
32