mail archive of the barebox mailing list
 help / color / mirror / Atom feed
* [PATCH] ARM: fix GCC 11.x build failures for ARMv7
@ 2022-04-08 17:01 Ian Abbott
  2022-04-12  7:53 ` Sascha Hauer
  0 siblings, 1 reply; 2+ messages in thread
From: Ian Abbott @ 2022-04-08 17:01 UTC (permalink / raw)
  To: barebox; +Cc: Ian Abbott

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@mev.co.uk>
---
 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


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH] ARM: fix GCC 11.x build failures for ARMv7
  2022-04-08 17:01 [PATCH] ARM: fix GCC 11.x build failures for ARMv7 Ian Abbott
@ 2022-04-12  7:53 ` Sascha Hauer
  0 siblings, 0 replies; 2+ messages in thread
From: Sascha Hauer @ 2022-04-12  7:53 UTC (permalink / raw)
  To: Ian Abbott; +Cc: barebox

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@mev.co.uk>
> ---
>  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
> 
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2022-04-12  8:00 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-08 17:01 [PATCH] ARM: fix GCC 11.x build failures for ARMv7 Ian Abbott
2022-04-12  7:53 ` Sascha Hauer

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox