All underscored-prefixed symbols have the right re-defined by the compiler, so it's definitely not safe to use any.
ICC doesn't seem to like it, GCC doesn't seem to care.
Original thread:
date: Jan 25, 2007 2:41 PM
subject: [MPlayer-dev-eng] [PATCH] remove illegal underscored-prefixed symbols
AND
date: 01/25/2007 11:43 AM
subject: Re: [MPlayer-dev-eng] [PATCH] compiling with Intel C
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22019 b3059339-0415-0410-9bf9-f77b7e298cf2
based on patch by Dominik Mierzejewski <dominik@rangers.eu.org>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8452 b3059339-0415-0410-9bf9-f77b7e298cf2
diego
gpoirier
henry
alex
arpi