Albin Tonnerre a écrit : > On Fri, Aug 07, 2009 at 01:50:03PM +0200, Matthieu CASTET wrote : >> Albin Tonnerre a écrit : >>> On Fri, Aug 07, 2009 at 11:36:56AM +0200, Alain Knaff wrote : >>>> On 08/07/09 11:24, Albin Tonnerre wrote: > >>>>> Regards, > >>>> Could it be that the patches that remove division (zutil.h and inflate.c) >>>> have somehow not been applied? > >>> Indeed, they've not been applied. However, I'd rather try to understand why >>> exactly this is an issue when compiling with -Os and not -O2 instead of working >>> around it by removing the divisions. > >> Look at the generated code. > >> Arm doesn't have division instruction. >> May be at -Os gcc emit a call to the software division, but at -O2 it >> manage to optimise the division (transform it in shift, inline some >> builtin, ...). > > Yes, I figured that out. What I don't get, though, is that it fails while the > software division symbol (__aeabi_uidivmod here) does seem to be provided by > libgcc. > AFAIK we don't link the kernel with libgcc. That's why the kernel provide __aeabi_* in arch/arm/lib -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
