Building barebox for ARMv7 with GCC 11.x results in errors similar to
the following:
CC common/state/state_variables.o
{standard input}: Assembler messages:
{standard input}:1535: Error: selected processor does not support `rev r3,r3' in Thumb mode
{standard input}:1576: Error: selected processor does not support `rev r3,r3' in Thumb mode
Or:
CC common/state/state_variables.o
{standard input}: Assembler messages:
{standard input}:1405: Error: selected processor does not support `rev r3,r3' in ARM mode
{standard input}:1453: Error: selected processor does not support `rev r3,r3' in ARM mode
The problem is that the compiler option `-march=armv7-a` is not being
chosen by "arch/arm/Makefile", but rather the fallback options
`-march=armv5t -Wa,-march=armv7-a` are being chosen.
Appending `-msoft-float` to `KBUILD_CPPFLAGS` earlier in
"arch/arm/Makefile" before the tests for supported `-march` options
seems to fix the problem.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
arch/arm/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 610ded8a12..124a3fc40c 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -8,6 +8,7 @@ ifeq ($(CONFIG_CPU_V8),y)
KBUILD_CPPFLAGS +=$(call cc-option,-maarch64,)
else
KBUILD_CPPFLAGS +=$(call cc-option,-marm,)
+KBUILD_CPPFLAGS += -msoft-float
endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
@@ -78,7 +79,7 @@ KBUILD_CPPFLAGS += $(CFLAGS_ABI) $(arch-y) $(tune-y)
KBUILD_AFLAGS += -include asm/unified.h
export S64 = _64
else
-KBUILD_CPPFLAGS += $(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float $(CFLAGS_THUMB2)
+KBUILD_CPPFLAGS += $(CFLAGS_ABI) $(arch-y) $(tune-y) $(CFLAGS_THUMB2)
KBUILD_AFLAGS += -include asm/unified.h -msoft-float $(AFLAGS_THUMB2)
endif
--
2.35.1
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