http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53912
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-07-20 15:54:08 UTC --- That patch can't work properly, on targets where uintptr_t isn't unsigned long you'll either get warnings from using %lx for it, or it will misbehave if uintptr_t is even different size. You either need to cast the argument cast to uintptr_t afterwards to (unsigned long), or some other type and adjust %lx to something matching it. POSIX supports %zx for size_t and %tx for ptrdiff_t, but uintptr_t doesn't have to match either of those, furthermore we shouldn't rely on it being supported (unlike %lx).
