https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007
--- Comment #17 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #16) > Or just make sure the libraries are still built with -mcpu=power8 even when > the compiler defaults to something else. That doesn't scale. > That said, neither multilibs nor just making sure libraries are built with > -mcpu=power8 can help with libraries outside of gcc (unless they are built > as multilibs or with the extra flags). Sure. But this bug is about that a compiler built --with-cpu=X can not build anything that can run on any older CPU (or does not have some feature that X has, more generally). This is a problem that we already do have a solution for, but something we have disabled in the powerpc64le-linux subtarget unfortunately. > or build gcc and all the needed libraries yourself. Yup. But it should not be necessary to build a different GCC.
