From e85d1d65cd8a9083040e280d172eba762875f8f1 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Wed, 22 Aug 2018 22:51:09 +0900 Subject: kbuild: test dead code/data elimination support in Kconfig This config option should be enabled only when both the compiler and the linker support necessary flags. Add proper dependencies to Kconfig. Signed-off-by: Masahiro Yamada --- Makefile | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index c4d7b4befac6..1623b8b6e8f5 100644 --- a/Makefile +++ b/Makefile @@ -790,8 +790,8 @@ KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) endif ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION -KBUILD_CFLAGS_KERNEL += $(call cc-option,-ffunction-sections,) -KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdata-sections,) +KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections +LDFLAGS_vmlinux += --gc-sections endif # arch Makefile may override CC so keep this after arch Makefile is included @@ -857,10 +857,6 @@ LDFLAGS_BUILD_ID := $(call ld-option, --build-id) KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) -ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION -LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) -endif - ifeq ($(CONFIG_STRIP_ASM_SYMS),y) LDFLAGS_vmlinux += $(call ld-option, -X,) endif -- cgit v1.2.3-55-g7522