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kbuild: remove cc-option test of -ffreestanding

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Some Makefiles already pass -ffreestanding unconditionally.
For example, arch/arm64/lib/Makefile, arch/x86/purgatory/Makefile.

No problem report so far about hard-coding this option. So, we can
assume all supported compilers know -ffreestanding.

I confirmed GCC 4.8 and Clang manuals document this option.

Get rid of cc-option from -ffreestanding.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Masahiro Yamada
2020-06-27 03:59:13 +09:00
parent 893ab00439
commit 685969e0bd
4 changed files with 4 additions and 4 deletions
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2
drivers/firmware/efi/libstub/Makefile
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@@ -29,7 +29,7 @@ cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt
KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
-include $(srctree)/drivers/firmware/efi/libstub/hidden.h \
-D__NO_FORTIFY \
$(call cc-option,-ffreestanding) \
-ffreestanding \
-fno-stack-protector \
$(call cc-option,-fno-addrsig) \
-D__DISABLE_EXPORTS