On Mon, Jul 29, 2019 at 9:04 AM Nathan Chancellor <[email protected]> wrote: > > On Mon, Jul 29, 2019 at 06:15:17PM +0900, Masahiro Yamada wrote: > > CLANG_FLAGS is initialized by the following line: > > > > CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) > > > > ..., which is run only when CROSS_COMPILE is set. > > > > Some build targets (bindeb-pkg etc.) recurse to the top Makefile. > > > > When you build the kernel with Clang but without CROSS_COMPILE, > > the same compiler flags such as -no-integrated-as are accumulated > > into CLANG_FLAGS. > > > > If you run 'make CC=clang' and then 'make CC=clang bindeb-pkg', > > Kbuild will recompile everything needlessly due to the build command > > change. > > > > Fix this by correctly initializing CLANG_FLAGS. > > > > Fixes: 238bcbc4e07f ("kbuild: consolidate Clang compiler flags") > > Cc: <[email protected]> # v4.20+ > > Signed-off-by: Masahiro Yamada <[email protected]> > > Reviewed-by: Nathan Chancellor <[email protected]>
Acked-by: Nick Desaulniers <[email protected]> -- Thanks, ~Nick Desaulniers
