| 1 | # glibc21.m4 serial 5 |
| 2 | dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2013 Free Software Foundation, |
| 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 | ) |