[mc1322x] contiki compilation error

[Camilo, Alex]

I'l try installing a gnu-arm tool-chain from source and compiling my
libraries. I'm running into other problems such as the finished contiki
binary being about 250k.

On Mon, Dec 7, 2009 at 11:05 AM, Mariano Alvira <mar at devl.org> wrote:

> On Mon, Dec 07, 2009 at 09:34:18AM -0500, Camilo, Alex wrote:
> > Thanks for the help. I made it to the linker and i got the following
> errors.
> > I don't understand why a library would use hardware floating point. I was
> under
> > the assumption that the arm7tdmi in this chip lacks the requisite
> coprocessor.
>
> > arm-elf-gcc -T ../../cpu/mc1322x/mc1322x.lds -nostartfiles -static
> > -DCONTIKI_TARGET_MC1322X -I. -I../../core -I../../cpu/mc1322x
> -I../../cpu/
> > mc1322x/loader -I../../cpu/mc1322x/dbg-io -I../../platform/mc1322x
>  -DWITH_UIP
> > -DWITH_ASCII -DMCK= -Werror -mcpu=arm7tdmi-s -mthumb-interwork
> -march=armv4t
> > -mtune=arm7tdmi-s -DCONFIG_ARM -D__ARM__ -g  -Os -DRUN_AS_SYSTEM
> -DROM_RUN
> > -fno-strict-aliasing  -fno-common -ffixed-r8 -msoft-float -DTEXT_BASE=
> > 0x00400000 -fno-builtin-printf -fno-builtin-sprintf  -I.
> -I../../platform/
> > mc1322x/. -I../../platform/mc1322x/apps -I../../platform/mc1322x/net
> -I../../
> > cpu/mc1322x/. -I../../core/dev -I../../core/lib -I../../core/net
> -I../../core/
> > net/mac -I../../core/net/rime -I../../core/net/routing -I../../core/sys
> -I../..
> > /core/cfs -I../../core/ctk -I../../core/lib/ctk -I../../core/loader
> -I../../
> > core/. -nostartfiles -o hello-world.mc1322x hello-world.co obj_mc1322x/
> > contiki-mc1322x-main.o obj_mc1322x/startup.o obj_mc1322x/symbols.o
> > contiki-mc1322x.a contiki-mc1322x.a
> >
> /Users/acamilo/yagarto/yagarto-4.4.2/bin/../lib/gcc/arm-elf/4.4.2/../../../../
> > arm-elf/bin/ld: ERROR:
> /Users/acamilo/yagarto/yagarto-4.4.2/bin/../lib/gcc/
> > arm-elf/4.4.2/interwork/libgcc.a(_udivsi3.o) uses hardware FP, whereas
> > hello-world.mc1322x uses software FP
>
> To me this looks like your glibc is using hardware FP. The OE
> toolchain builds glibc with "--without-fp"
>
> from glibc/glibc-package.bbclass:
>
> def get_glibc_fpu_setting(bb, d):
>    if bb.data.getVar('TARGET_FPU', d, 1) in [ 'soft' ]:
>        return "--without-fp"
>    return ""
>
>
> TARGET_FPU is set to soft in mc1322x/conf/machine/mc13224v.conf
>
> I've never used yagarto. Can you build glibc with --without-fp?
>
> -Mar.
>



-- 
Alex Camilo
1-877-474-6038 ext#703
Head of Research and Design at Neuron Robotics, LLC.
www.neuronrobotics.com
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