On Monday, October 03, 2011 23:26:25 Michael LIAO wrote:
> On Mon, Oct 3, 2011 at 5:46 PM, Mike Frysinger wrote:
> > in terms of asm code, it's still possible to use ifdef's to handle cases
> > where you truly need different code paths.
> 
> Yeah, we could have '#ifdef X32ABI" in assembly file to select
> different path. But, how to generate that macro, says X32ABI, based on
> autoconf to detect/select target (not only target architecture but
> also target ABI.).

you don't need to do it yourself.  please look at the x32 website near the 
bottom.  it shows you how to use ifdef's that gcc itself provides.
-mike