On Fri, Apr 08, 2022 at 06:01:54PM +0100, Ian Abbott wrote:
> 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(-)
Applied, thanks
Sascha
>
> 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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>
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