[PATCH v2] Xmd.h: Treat __ILP32__ targets as LONG32 ones

Alan Coopersmith alan.coopersmith at oracle.com
Sun Jun 10 11:01:18 PDT 2012

On 06/10/12 09:22 AM, Lu, Hongjiu wrote:
> We are proposing to extend x86-64 psABI to support
> ILP32 model:
> http://gcc.gnu.org/ml/gcc/2012-05/msg00258.html
> If a software package needs update to support ILP32
> in x86-64, __ILP32__ can used to distinguish LP64 model
> from ILP32 model.  If there are no differences
> between ILP32 and LP64 models, no changes are needed.  If
> an x86-64 compiler doesn't support ILP32 model, checking
> __ILP32__ will make sure that it will works.

If the software didn't care about the ABI, they wouldn't check for
__amd64__ in the first place.   This is a compatibility breaking
change that should not be allowed.   Define a new __x32__ symbol,
don't break __amd64__.

	-Alan Coopersmith-              alan.coopersmith at oracle.com
	 Oracle Solaris Engineering - http://blogs.oracle.com/alanc

More information about the xorg-devel mailing list