查看安装的glibc版本

方法一：
找到libc的DSO(dynamic shared object)并运行它，如下所示：
[whb@jcwkyl ~]$ locate libc.so 
/lib/libc.so.6 
/lib/i686/nosegneg/libc.so.6 
/usr/lib/libc.so 
[whb@jcwkyl ~]$ /lib/libc.so.6 
GNU C Library stable release version 2.5, by Roland McGrath et al. 
Copyright (C) 2006 Free Software Foundation, Inc. 
This is free software; see the source for copying conditions. 
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE. 
Compiled by GNU CC version 4.1.2 20070626 (Red Hat 4.1.2-14). 
Compiled on a Linux 2.6.9 system on 2008-05-23. 
Available extensions: 
        The C stubs add-on version 2.1.2. 
        crypt add-on version 2.1 by Michael Glad and others 
        GNU Libidn by Simon Josefsson 
        GNU libio by Per Bothner 
        NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk 
        Native POSIX Threads Library by Ulrich Drepper et al 
        BIND-8.2.3-T5B 
        RT using linux kernel aio 
Thread-local storage support included. 
For bug reporting instructions, please see: 
<http://www.gnu.org/software/libc/bugs.html>. 

方法二：
将下面的C代码编译运行：

[cpp] view plaincopy

1. #include <stdio.h>  
2. #include <gnu/libc-version.h>  
3. int main (void) { puts (gnu_get_libc_version ()); return 0; }  

[whb@jcwkyl c]$ gcc checkglibcversion.c -o checkglibcversion 
[whb@jcwkyl c]$ ./checkglibcversion  
2.5