From: Joel Stanley Date: Fri, 2 Nov 2018 00:44:55 +0000 (+1030) Subject: raid6/ppc: Fix build for clang X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e213574a449f7a57d4202c1869bbc7680b6b5521;p=openwrt%2Fstaging%2Fblogic.git raid6/ppc: Fix build for clang We cannot build these files with clang as it does not allow altivec instructions in assembly when -msoft-float is passed. Jinsong Ji wrote: > We currently disable Altivec/VSX support when enabling soft-float. So > any usage of vector builtins will break. > > Enable Altivec/VSX with soft-float may need quite some clean up work, so > I guess this is currently a limitation. > > Removing -msoft-float will make it work (and we are lucky that no > floating point instructions will be generated as well). This is a workaround until the issue is resolved in clang. Link: https://bugs.llvm.org/show_bug.cgi?id=31177 Link: https://github.com/ClangBuiltLinux/linux/issues/239 Signed-off-by: Joel Stanley Reviewed-by: Nick Desaulniers Signed-off-by: Michael Ellerman --- diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile index 2f8b61dfd9b0..7ed43eaa02ef 100644 --- a/lib/raid6/Makefile +++ b/lib/raid6/Makefile @@ -18,6 +18,21 @@ quiet_cmd_unroll = UNROLL $@ ifeq ($(CONFIG_ALTIVEC),y) altivec_flags := -maltivec $(call cc-option,-mabi=altivec) + +ifdef CONFIG_CC_IS_CLANG +# clang ppc port does not yet support -maltivec when -msoft-float is +# enabled. A future release of clang will resolve this +# https://bugs.llvm.org/show_bug.cgi?id=31177 +CFLAGS_REMOVE_altivec1.o += -msoft-float +CFLAGS_REMOVE_altivec2.o += -msoft-float +CFLAGS_REMOVE_altivec4.o += -msoft-float +CFLAGS_REMOVE_altivec8.o += -msoft-float +CFLAGS_REMOVE_altivec8.o += -msoft-float +CFLAGS_REMOVE_vpermxor1.o += -msoft-float +CFLAGS_REMOVE_vpermxor2.o += -msoft-float +CFLAGS_REMOVE_vpermxor4.o += -msoft-float +CFLAGS_REMOVE_vpermxor8.o += -msoft-float +endif endif # The GCC option -ffreestanding is required in order to compile code containing