path: root/arch/sparc/Makefile
diff options
authorDavid S. Miller <>2016-01-17 11:47:29 -0500
committerDavid S. Miller <>2016-03-01 00:24:04 -0500
commit22be3b105597002ad3499bdb9c0aba49c9ab05f7 (patch)
tree1cdd6cedaa2f5cd097498396b0ce6e82781f48be /arch/sparc/Makefile
parentca0bb0798022732773752fee97bb633c6f3623d2 (diff)
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 <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'arch/sparc/Makefile')
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index eaee14637d93..8496a074bd0e 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -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_AFLAGS += -m32 -Wa,-Av8