On Wed, Nov 9, 2011 at 12:15 PM, Gabe Black <gabebl...@google.com> wrote: > > > On Tue, Nov 8, 2011 at 5:10 PM, Graeme Russ <graeme.r...@gmail.com> wrote: >> >> Hi Gabe, >> >> first up - Please stop top-posting >> >> On Wed, Nov 9, 2011 at 11:59 AM, Gabe Black <gabebl...@chromium.org> >> wrote: >> > I'm pretty sure u-boot doesn't link with glibc. I'd expect that to cause >> > all >> > sorts of problems on top of being really big. There are default, generic >> > implementations which it can use, or you can specialize them to take >> > advantage of architecture specific features like I'm doing here. >> >> Hmm, >> >> # Add GCC lib >> ifdef USE_PRIVATE_LIBGCC >> ifeq ("$(USE_PRIVATE_LIBGCC)", "yes") >> PLATFORM_LIBGCC = $(OBJTREE)/arch/$(ARCH)/lib/libgcc.o >> else >> PLATFORM_LIBGCC = -L $(USE_PRIVATE_LIBGCC) -lgcc >> endif >> else >> PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(CFLAGS) >> -print-libgcc-file-name`) -lgcc >> endif >> PLATFORM_LIBS += $(PLATFORM_LIBGCC) >> export PLATFORM_LIBS >> >> So we link with libgcc - In another email I raise the question of why >> regparm is not conflicting here >> >> And why do we have an option to not link to libgcc, but on the other >> hand we never link to libc - I'm confused >> >> Regards, >> >> Graeme >> > > I don't understand the question. regparm did conflict, which is the point of
Only on 64-bit operations - surely there are other libgcc functions not covered by your patch. And why had I not seen these before - was is a case of never hitting that call path? > my other patch. Why would having an option to link libgcc have anything to > do with glibc? U-Boot has its own partial libc implementation which has > generic implementations of certain functions which can be overridden. By not My point is, why does U-Boot implement parts of libgcc so as to not link to libgcc, but uses (by default) glibc - Why not always implement both, or always (by default) link to both? > linking to the generic implementation and providing a specialized one, the > performance improves two fold. Those are the two choices. Regards, Graeme _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot