Hello,
If I build U-Boot natively on an A20-Olinuxino-Micro (sunxi) running
Debian Jessie armhf, and the code includes certain operations such as
division of a long long, I get this error:
$ make
[...]
LDS u-boot.lds
LD u-boot
ld.bfd: error: /usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(bpabi.o) uses VFP
register arguments, u-boot does not
ld.bfd: failed to merge target specific data of file
/usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(bpabi.o)
ld.bfd: error: /usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(_divdi3.o) uses
VFP register arguments, u-boot does not
ld.bfd: failed to merge target specific data of file
/usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(_divdi3.o)
ld.bfd: error: /usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(_udivdi3.o) uses
VFP register arguments, u-boot does not
ld.bfd: failed to merge target specific data of file
/usr/lib/gcc/arm-linux-gnueabihf/4.9/libgcc.a(_udivdi3.o)
Makefile:1075: recipe for target 'u-boot' failed
make: *** [u-boot] Error 1
$
I think this is because U-Boot has been built with the soft-float ABI,
whereas my system only has a hard-float library. The relevant build
option is set in arch/arm/config.mk:
PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
The build works once I've removed the -msoft-float option.
Would it be possible to refactor the configuration under arch/arm/ so
that this option is not set for the platforms that don't need it?
There was a brief discussion of this issue on the linux-sunxi mailing
list suggesting it may have worked better in the past:
On 28/12/14 16:15, Chen-Yu Tsai wrote:
> It seems some recent changes in upstream broke building with hard float
> toolchains. Best use soft float.
>
> It's probably these commits:
>
> bf1af3d ARM: merge commonly-defined PLATFORM_RELFLAGS
> 3102274 ARM: refactor compiler options in config.mk
( https://www.mail-archive.com/linux-sunxi@googlegroups.com/msg09271.html )
Thanks very much,
B.R. Oake.
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
