https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71216
--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to Rin Okuyama from comment #9) > > > However, I have a question on this fix. How about the case where > > > "-Wa,-mXXX" option is given without "-mcpu=YYY" option specified? > > > > That might or might not work; the user had better know what he is > > doing if he uses an assembler option. > > Hmm, I understand. Is this documented explicitly anywhere? Not in so many words I think, no. > > GCC does not support -me500, right. You need to configure your compiler > > for a powerpc-*-eabispe* target as far as I know (I'm no expert on this). > > We use -Wa,-me500 option to compile kernel on some machines. As they > share userland with other machines, we cannot configure GCC for a > powerpc-*-eabispe* target. Instead, I found a workaround to specify > -mcpu=powerpc option. It passes -mppc option to assembler, but as it > is preceding to -me500, the latter is prior to the former. Maybe you could use -mcpu=e500mc or similar? Or, GCC should probably have a -mcpu=e500 option, but someone has to write the code for it.
