[yocto] Compile issue with 1.7 SDK and hf

[Teresa Gámez]

Hello,

I have installed a SDK based on yocto 1.7 with
DEFAULTTUNE ?="cortexa8thf-neon" set. 

I have tried to compile the barebox bootloader with this
SDK like this:

source /opt/poky/1.7/environment-setup-cortexa8t2hf-vfp-neon-poky-linux-gnueabi
unset LDFLAGS
make am335x_defconfig
Also enabled a barebox target tool in menuconfig: BAREBOXENV_TARGET 
make

And see following compile error:

..
  CC      scripts/bareboxenv-target
In file included
from /opt/poky/1.7/sysroots/cortexa8t2hf-vfp-neon-poky-linux-gnueabi/usr/include/features.h:389:0,

from /opt/poky/1.7/sysroots/cortexa8t2hf-vfp-neon-poky-linux-gnueabi/usr/include/stdio.h:27,
                 from scripts/bareboxenv.c:20:
/opt/poky/1.7/sysroots/cortexa8t2hf-vfp-neon-poky-linux-gnueabi/usr/include/gnu/stubs.h:7:29: fatal error: gnu/stubs-soft.h: No such file or directory
 # include <gnu/stubs-soft.h>
                            ^
compilation terminated.

I have tried the same with other non yocto hf toolchains. Compilation
worked there. I wonder if this is a toolchain issue or more a barebox
issue.

I also noticed:

arm-poky-linux-gnueabi-gcc -dM -E - < /dev/null | grep ARM_PCS
#define __ARM_PCS 1


 arm-poky-linux-gnueabi-gcc -mfloat-abi=hard -dM -E - < /dev/null | grep
ARM_PCS
#define __ARM_PCS_VFP 1

Other hf toolchains have __ARM_PCS_VFP 1 regardless if -mfloat-abi
parameter set or not. I have no clue what the right behaviour should be.
Can someone explain?

Regards
Teresa