On Tue, 28 Oct 2008 22:05:24 +1100 hce <webmail.hce at gmail.com> wrote: > Hi, > > I've just installed Fedora 9 64 bit on an Intel PC i686. Is there an > enviirnment macro I can check on a makefile to find it is a 64 bit OS? You can ask the system itself: uname -a