On Wed, Sep 7, 2022 at 1:08 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote: > > On Mon, Sep 05, 2022 at 06:09:28PM +0900, Masahiro Yamada wrote: > > On Thu, Sep 1, 2022 at 4:53 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote: > > > > > > On Wed, Aug 31, 2022 at 11:44:05AM -0700, Nick Desaulniers wrote: > > > > as-instr uses KBUILD_AFLAGS, but as-option uses KBUILD_CFLAGS. This can > > > > cause as-option to fail unexpectedly because clang will emit > > > > -Werror,-Wunused-command-line-argument for various -m and -f flags for > > > > assembler sources. > > > > > > Now that I am looking closer at it, where does that '-Werror' come from? > > > > The related commit is > > c3f0d0bc5b01ad90c45276952802455750444b4f > > > > The previous discussion with Arnd is > > https://lore.kernel.org/linux-kbuild/20170314213724.3836900-1-arnd@xxxxxxxx/ > > Right, although this is for cc-option, not as-option, no? Sorry, I misunderstood your comments. My reference is about -Werror in cc-option. It is unrelated to as-option. You are right. Currently, as-option takes KBUILD_CFLAGS instead of KBUILD_AFLAGS. The '-Werror,' of -Werror,-Wunused-command-line-argument presumably came from CONFIG_WERROR. -- Best Regards Masahiro Yamada
