[U-Boot] error when building env

[Masahiro Yamada]

Hi Luka, Tom,


On Thu, 5 Jun 2014 14:25:47 -0400
Tom Rini <trini at ti.com> wrote:

> On Mon, May 19, 2014 at 02:14:03PM +0200, Luka Perkov wrote:
> > Hi Tom,
> > 
> > On Fri, May 16, 2014 at 01:58:05PM -0400, Tom Rini wrote:
> > > On Fri, May 16, 2014 at 07:26:51PM +0200, Luka Perkov wrote:
> > > > when trying to build env with "-mfloat-abi=hard" I'm hitting this error:
> > > > 
> > > > /opt/openwrt/trunk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-uclibcgnueabi-gcc  -o tools/env/fw_printenv_unstripped tools/env/fw_env.o tools/env/fw_env_main.o tools/env/crc32.o tools/env/ctype.o tools/env/linux_string.o tools/env/env_attr.o tools/env/env_flags.o tools/env/aes.o  
> > > > /opt/build/owrt_staging_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/../lib/gcc/arm-openwrt-linux-uclibcgnueabi/4.8.3/../../../../arm-openwrt-linux-uclibcgnueabi/bin/ld: error: tools/env/fw_printenv_unstripped uses VFP register arguments, tools/env/fw_env.o does not
> > > 
> > > Odd.  I can build 'tools-only' with my hard float toolchain fine.  Can
> > > you build with V=1 and see what files are perhaps not getting passed in
> > > a -mfloat option?
> > 
> > The patch below fixes the problem I was having. Is that good enough for
> > proper patch submission?
> > 
> > With it I am able to use replace default HOSTCFLAGS with what was
> > defined in TARGET_CFLAGS.
> > 
> > Luka
> > 
> > diff --git a/tools/env/Makefile b/tools/env/Makefile
> > index f5368bc..4de1d51 100644
> > --- a/tools/env/Makefile
> > +++ b/tools/env/Makefile
> > @@ -10,6 +10,10 @@
> >  # with "CC" here for the maximum code reuse of scripts/Makefile.host.
> >  HOSTCC = $(CC)
> >  
> > +ifneq ($(TARGET_CFLAGS),)
> > +HOSTCFLAGS = $(TARGET_CFLAGS)
> > +endif
> > +
> >  # Compile for a hosted environment on the target
> >  HOST_EXTRACFLAGS  = $(patsubst -I%,-idirafter%, $(UBOOTINCLUDE)) \
> >  		-idirafter $(srctree)/tools/env \
> 
> This still seems odd.  Masahiro?
> 

Looks odd to me.

According to Luka's build log,
he is trying to compile the C sources with hard float,
but link them against soft float library.

In my understanding,  consistency should be kept between compile and link stage
by the compiler as is .
We don't have to tweak HOSTCFLAGS from the outside.


Best Regards
Masahiro Yamada