[boost] [config] BOOST_HAS_PTHREADS config test

From: Markus Schöpflin (markus.schoepflin_at_[hidden])
Date: 2008-04-14 07:14:12

Hello,

I would like to commit attached patch to clear this error: 
http://tinyurl.com/5ymwv5.

OK to commit?

Regards,
Markus

Index: boost_has_pthreads.ipp
===================================================================
--- boost_has_pthreads.ipp	(revision 44408)
+++ boost_has_pthreads.ipp	(working copy)
@@ -14,7 +14,7 @@
 
 namespace boost_has_pthreads{
 
-void* thread_proc(void* arg)
+extern "C" void* thread_proc(void* arg)
 {
    return arg;
 }