Szabolcs Nagy ran into a kernel build failure with a custom gcc toochain that sets -mfpu=auto -mfloat-abi=hard:
/tmp/ccmNdcdf.s:1898: Error: selected processor does not support `cpsid i' in ARM mode The problem is that $(call cc-option, -march=armv7-a) fails before the kernel overrides the gcc options to also pass -msoft-float. Move the option to the beginning the Makefile, before we call cc-option for the first time. Reported-by: Szabolcs Nagy <[email protected]> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87302 Signed-off-by: Arnd Bergmann <[email protected]> --- arch/arm/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 7d5cd0f85461..e428ea6eb0fa 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -16,6 +16,8 @@ LDFLAGS_vmlinux += --be8 KBUILD_LDFLAGS_MODULE += --be8 endif +KBUILD_CFLAGS += -msoft-float + ifeq ($(CONFIG_ARM_MODULE_PLTS),y) KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds endif @@ -135,7 +137,7 @@ AFLAGS_ISA :=$(CFLAGS_ISA) endif # Need -Uarm for gcc < 3.x -KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm +KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -Uarm KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float CHECKFLAGS += -D__arm__ -- 2.26.2
