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Subject[PATCH] ARM: pass -msoft-float to gcc earlier
Date
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 <szabolcs.nagy@arm.com>
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87302
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/Makefile | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index fcd40c5bfd94..9804f8f61e67 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_CPU_32v4),y)
LDFLAGS_vmlinux += $(call ld-option,--fix-v4bx)
LDFLAGS_MODULE += $(call ld-option,--fix-v4bx)
@@ -138,7 +140,7 @@ AFLAGS_ISA :=$(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
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