On Tue, Aug 04, 2009 at 08:03:56AM -0700, Tom Tromey wrote: > >>>>> "Erwin" == Unruh, Erwin <erwin.un...@ts.fujitsu.com> writes: > > Erwin> In current gcc the order of options -D and -U is significant. The > Erwin> Single Unix(r) Specification explicitly specifies that the order > Erwin> should not matter for the c89 command. It reads (cited from > Erwin> version 2, which is ten years old): > > Erwin> I did not find a justification for the current gcc > Erwin> behavior. > > GCC's behavior is more useful. And, given its age, I think it would be > a mistake to change it. > > I think if you want the c89 behavior, a wrapper program of some kind > would be the way to go.
Another alternative would be an extra flag that would turn on conformance to the spec. But gcc can't change its default behavior; this would cause massive breakage.
