Commit 4a1bec46 authored May 08, 2017 by Nick Desaulniers Committed by Ingo Molnar May 09, 2017

x86/build: Don't add -maccumulate-outgoing-args w/o compiler support



Clang does not support this machine dependent option.

Older versions of GCC (pre 3.0) may not support this option, added in
2000, but it's unlikely they can still compile a working kernel.

Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170509032946.20444-1-nick.desaulniers@gmail.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent d2b6dc61

arch/x86/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -179,7 +179,8 @@ ifdef CONFIG_JUMP_LABEL
		endif

		ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
		KBUILD_CFLAGS += -maccumulate-outgoing-args
		# This compiler flag is not supported by Clang:
		KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
		endif

		# Stackpointer is addressed different for 32 bit and 64 bit x86

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