This is needed because clang doesn't select which linker to use based on $LD but rather -fuse-ld=lld. This is problematic especially for cc-ldoption, which checks for linker flag support via invoking the compiler, rather than the linker. Link: https://github.com/ClangBuiltLinux/linux/issues/342 Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> --- Changes V1->V2: * add reviewed and tested by tags. * move this addition up 2 statments so that it's properly added to KBUILD_*FLAGS as per Nathan. Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Makefile b/Makefile index d3b65e96d183..00e8e01d23fc 100644 --- a/Makefile +++ b/Makefile @@ -500,6 +500,9 @@ ifneq ($(GCC_TOOLCHAIN),) CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif CLANG_FLAGS += -no-integrated-as +ifneq ($(shell $(LD) --version 2>&1 | head -n 1 | grep LLD),) +CLANG_FLAGS += -fuse-ld=lld +endif KBUILD_CFLAGS += $(CLANG_FLAGS) KBUILD_AFLAGS += $(CLANG_FLAGS) export CLANG_FLAGS -- 2.20.1.791.gb4d0f1c61a-goog
