Commit 22be3b10 authored Jan 17, 2016 by David S. Miller

sparc32: Add -Wa,-Av8 to KBUILD_CFLAGS.



Binutils used to be (erroneously) extremely permissive about
instruction usage.  But that got fixed and if you don't properly tell
it to accept classes of instructions it will fail.

This uncovered a specs bug on sparc in gcc where it wouldn't pass the
proper options to binutils options.

Deal with this in the kernel build by adding -Wa,-Av8 to KBUILD_CFLAGS.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ca0bb079

arch/sparc/Makefile

+6 −0

Original line number	Diff line number	Diff line
		@@ -24,7 +24,13 @@ LDFLAGS := -m elf32_sparc
		export BITS := 32
		UTS_MACHINE := sparc

		# We are adding -Wa,-Av8 to KBUILD_CFLAGS to deal with a specs bug in some
		# versions of gcc. Some gcc versions won't pass -Av8 to binutils when you
		# give -mcpu=v8. This silently worked with older bintutils versions but
		# does not any more.
		KBUILD_CFLAGS += -m32 -mcpu=v8 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
		KBUILD_CFLAGS += -Wa,-Av8

		KBUILD_AFLAGS += -m32 -Wa,-Av8

		else

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