From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cesar Rincon <crincon@et.com.mx>
Subject: Re: compiling programs which use pthreads
Date: Sun, 25 Jan 2004 03:44:54 -0600
Sender: linux-c-programming-owner@vger.kernel.org
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Ipsissima verba David Erman:
> 
> You need to link with  -lpthread. I.e.
> 
> gcc foo.c -lpthread

You should probably define _REENTRANT as well, e.g.

 gcc -D_REENTRANT -o foo foo.c -lpthread

so you get a per-thread errno and thread-safe "*_r" functions
(getlogin_r(), gethostbyaddr_r(), gethostbyname_r(), and many others).
See the "Feature Test Macros" section of the glibc manual, and of
course the "POSIX Threads" section for all the gory details.

 -CR

-- 
Ceterum censeo: SCO delenda est.