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8690e634 | 1 | # glibc21.m4 serial 5 |
49e4877c | 2 | dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2016 Free Software Foundation, |
8690e634 JK |
3 | dnl Inc. |
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. | |
7 | ||
8 | # Test for the GNU C Library, version 2.1 or newer, or uClibc. | |
9 | # From Bruno Haible. | |
10 | ||
11 | AC_DEFUN([gl_GLIBC21], | |
12 | [ | |
13 | AC_CACHE_CHECK([whether we are using the GNU C Library >= 2.1 or uClibc], | |
14 | [ac_cv_gnu_library_2_1], | |
15 | [AC_EGREP_CPP([Lucky], | |
16 | [ | |
17 | #include <features.h> | |
18 | #ifdef __GNU_LIBRARY__ | |
19 | #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2) | |
20 | Lucky GNU user | |
21 | #endif | |
22 | #endif | |
23 | #ifdef __UCLIBC__ | |
24 | Lucky user | |
25 | #endif | |
26 | ], | |
27 | [ac_cv_gnu_library_2_1=yes], | |
28 | [ac_cv_gnu_library_2_1=no]) | |
29 | ] | |
30 | ) | |
31 | AC_SUBST([GLIBC21]) | |
32 | GLIBC21="$ac_cv_gnu_library_2_1" | |
33 | ] | |
34 | ) |