While looking at different ways to find out what version of libc is installed on a system (especially useful on a system that is compiled from source such as LFS), I discovered that you can actually run libc and it will print out useful version info.
For example
# /lib/libc.so.6
GNU C Library (GNU libc) stable release version 2.17, by Roland McGrath et al.
Copyright (C) 2012 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 4.7.2.
Compiled on a Linux 3.8.1 system on 2013-07-18.
Available extensions:
crypt add-on version 2.1 by Michael Glad and others
GNU Libidn by Simon Josefsson
Native POSIX Threads Library by Ulrich Drepper et al
BIND-8.2.3-T5B
libc ABIs: UNIQUE IFUNC
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.
Notes on various technologies and other cool stuff I am playing around with. My own technical stream of consciousness.
