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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-08-22 22:51:09 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-08-24 08:10:00 +0900 |
| commit | e85d1d65cd8a9083040e280d172eba762875f8f1 (patch) | |
| tree | 8038ed2a967ad92502f45a7173bdda15cfed57b7 /Makefile | |
| parent | f6f57a46435d7253a52a1a07a58183678ad266a0 (diff) | |
| download | lwn-e85d1d65cd8a9083040e280d172eba762875f8f1.tar.gz lwn-e85d1d65cd8a9083040e280d172eba762875f8f1.zip | |
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 <yamada.masahiro@socionext.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 8 |
1 files changed, 2 insertions, 6 deletions
@@ -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 |