kconfig: Add support for 'as-option' (c2d920bf) · Commits · 戴 / test

Currently kconfig does not have a feature that allows to detect if the used assembler supports a specific compilation option. Introduce 'as-option' to serve this purpose in the context of Kconfig: config X def_bool $(as-option,...) Signed-off-by:

Amit Daniel Kachhap <amit.kachhap@arm.com> Signed-off-by:

Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by:

Masahiro Yamada <masahiroy@kernel.org> Cc: linux-kbuild@vger.kernel.org Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:

Catalin Marinas <catalin.marinas@arm.com>

scripts/Kconfig.include

+6 −0

Original line number	Diff line number	Diff line
		@@ -31,6 +31,12 @@ cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /de
		# Return y if the linker supports <flag>, n otherwise
		ld-option = $(success,$(LD) -v $(1))

		# $(as-option,<flag>)
		# /dev/zero is used as output instead of /dev/null as some assembler cribs when
		# both input and output are same. Also both of them have same write behaviour so
		# can be easily substituted.
		as-option = $(success, $(CC) $(CLANG_FLAGS) $(1) -c -x assembler /dev/null -o /dev/zero)

		# $(as-instr,<instr>)
		# Return y if the assembler supports <instr>, n otherwise
		as-instr = $(success,printf "%b\n" "$(1)" \| $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)

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