http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53037
--- Comment #9 from H. Peter Anvin <hpa at zytor dot com> 2012-04-19 17:11:00 UTC --- Yes. The point is: WE WANT TO MIGRATE THE SYSTEM CALL INTERFACE TO AN ALIGNED __[us]64 INTERFACE, mostly so that new interfaces are properly aligned from the start. In order to do that, we need to flag the existing legacy interfaces which will need to be flagged as __compat_[us]64 in order to not break.
