https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101865
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to HaoChen Gui from comment #4) > I wonder if it's a Power8 architecture when those 6 options are all > disabled. Or it is regressed to Power7? The "_ARCH_PWR8" represents the > hardware architecture or the ISA it can be taken? It says what version of the ISA is effective. It should correspond to the -mcpu= used. Even if it would be possible to use -mcpu=power8 and then other command line flags that set everything back to it being just like Power7 (architecturally that is, ignoring scheduling etc.), we should still define _ARCH_PWR8.
