[PATCH 4.14 003/100] ARM: 8767/1: add support for building ARM kernel with clang

From: Greg Kroah-Hartman
Date: Thu Nov 29 2018 - 09:24:34 EST


4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Stefan Agner <stefan@xxxxxxxx>

(commit c1c386681bd73c4fc28eb5cc91cf8b7be9b409ba upstream)

Use cc-options call for compiler options which are not available
in clang. With this patch an ARMv7 multi platform kernel can be
successfully build using clang (tested with version 5.0.1).

Based-on-patches-by: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx>

Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/compressed/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -113,7 +113,7 @@ CFLAGS_fdt_ro.o := $(nossp_flags)
CFLAGS_fdt_rw.o := $(nossp_flags)
CFLAGS_fdt_wip.o := $(nossp_flags)

-ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
+ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin -I$(obj)
asflags-y := -DZIMAGE

# Supply kernel BSS size to the decompressor via a linker symbol.