[Buildroot] unimplemented: -mfloat-abi=hard and VFP

[Kelvin Cheung]

Got it.
Thanks very much!

在 2010年11月16日 上午2:59，Gustavo Zacarias <gustavo at zacarias.com.ar>写道：

> On 11/15/10 02:30, Kelvin Cheung wrote:
>
> > Hello all,
> >
> > *I want to generate a toolchain with hard float support.*
> > So I set two options as follows:
> > BR2_EXTRA_GCC_CONFIG_OPTIONS="--with-float=hard"
> > BR2_TARGET_OPTIMIZATION="-pipe -mhard-float"
> >
> > and I got this error message:
> > make[1]:正在离开目录 `/opt/buildroot/output/toolchain/uClibc-0.9.31'
> > touch /opt/buildroot/output/toolchain/uClibc-0.9.31/.config
> > /usr/bin/make -j1 -C /opt/buildroot/output/toolchain/uClibc-0.9.31 \
> >                 ARCH="arm" \
> >                 PREFIX=/opt/buildroot/output/toolchain/uClibc_dev/ \
> >                 DEVEL_PREFIX=/usr/ \
> >
> RUNTIME_PREFIX=/opt/buildroot/output/toolchain/uClibc_dev/ \
> >                 HOSTCC="/usr/bin/gcc" headers \
> >                 lib/crt1.o lib/crti.o lib/crtn.o \
> >                 install_headers
> > make[1]: 正在进入目录 `/opt/buildroot/output/toolchain/uClibc-0.9.31'
> >   MKDIR include/bits
> >   GEN include/bits/uClibc_config.h
> >   LN include/pthread.h
> >   ...
> >   LN include/sys/ucontext.h
> >   LN include/sys/user.h
> >   AS lib/crt1.o
> > *cc1: sorry, unimplemented: -mfloat-abi=hard and VFP*`
> > make[1]: *** [lib/crt1.o] 错误 1
> > make[1]:正在离开目录 `/opt/buildroot/output/toolchain/uClibc-0.9.31'
> > make: *** [/opt/buildroot/output/toolchain/uClibc-0.9.31/.configured] 错误
> 2
> >
> > Dose anyone have an idea?
> > Any suggestions would be appreciated.
>
> Yes, "man gcc" and "/VFP" snip...
> "Using -mfloat-abi=hard with VFP coprocessors is not supported.  Use
> -mfloat-abi=softfp with the appropriate -mfpu option to allow the
> compiler to generate code that makes use of the hardware floating-point
> capabilities for these CPUs."
> How about that?
> Regards.
>



-- 
Best Regards!
Kelvin
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