On Wed, Sep 04, 2019 at 11:46:45PM +0200, Arnd Bergmann wrote: > On Sat, Aug 31, 2019 at 6:26 PM Masahiro Yamada > <yamada.masahiro@xxxxxxxxxxxxx> wrote: > > > +# Some diagnostics enabled by default are noisy. > > +# Suppress them by using -Wno... except for W=1. > > + > > ifdef CONFIG_CC_IS_CLANG > > KBUILD_CFLAGS += -Wno-initializer-overrides > > KBUILD_CFLAGS += -Wno-format > > KBUILD_CFLAGS += -Wno-sign-compare > > KBUILD_CFLAGS += -Wno-format-zero-length > > endif > > FWIW, I just found out I missed a bug that clang failed to warn about > because of the -Wno-format. Apparently gcc warns only about type > mismatches that result in incompatible calling conventions (e.g. > int vs int64_t) but not smaller types (int, short) that get converted to an > int anyway. Passing -Wno-format turns both off. > > Arnd Hi Arnd, This has been fixed in clang 10.0.0 but this areas has not been updated as nobody has sent a patch yet: https://github.com/ClangBuiltLinux/linux/issues/378#issuecomment-524411147 Cheers, Nathan
