On Sun, Oct 04, 2020 at 12:16:14AM -0700, Nathan Chancellor wrote: > On Fri, Oct 02, 2020 at 03:15:26PM -0700, Kees Cook wrote: > > Clang handles 'maybe-uninitialized' better in the face of using UBSAN, > > so do not make this universally disabled for UBSAN builds. > > > > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > > Well this patch is not strictly necessary because Clang does not support > -Wmaybe-uninitialized anyways :) its flags are -Wuninitialized and > -Wsometimes-uninitialized so the warning stays enabled for UBSAN as it > stands. Ah, yes. Heh. Well... perhaps I can just drop this patch. > However, something like this could still worthwhile because it would > save us one call to cc-disable-warning (yay micro optimizations). > > Maybe it just does not need to have a whole new symbol, just make it > > ubsan-cflags-$(CONFIG_CC_IS_GCC) > > instead of > > ubsan-cflags-$(CONFIG_UBSAN) If it gets kept, I'd still like it gated on CONFIG_UBSAN in some way (e.g. the patch has an implicit depends due to the "if UBSAN" section). But yes, this patch is rather a no-op. -- Kees Cook
