[meta-freescale] i.mx6sl u-boot not booting when using a toolchain installed with populate_sdk

[Kursad Oney]

Hi Otavio,

> From: Otavio Salvador [mailto:otavio.salvador at ossystems.com.br] 
> 
> Hello Kursad,
> 
> On Thu, Oct 8, 2015 at 5:26 PM, Kursad Oney <Kursad.Oney at freescale.com> wrote:
> > I ran into an issue with the 1.8 fido toolchain I installed using 
> > populate_sdk task. I noticed this issue with both warpboard and the mx6slevk.
> >
> > I used the fido branch to create an SDK and used the following command 
> > to populate a toolchain:
> >
> >         bitbake core-image-base -c populate_sdk
> >
> > When I compile u-boot with this toolchain, nothing appears on the 
> > console when it is run out of eMMC. However, if I use the 
> > imx_usb_loader tool to download the u-boot image to memory, it runs just fine.
> >
> > I then installed the pre-built 1.6, 1.7, and 1.8 toolchains and to my 
> > surprise the u-boot image I built had no issues.
> >
> > Comparing the pre-built 1.8 toolchain and the one populated by 
> > populate_sdk, I noticed this in each one's environment setup scripts:
> >
> > pre-built:
> >         export CC="arm-poky-linux-gnueabi-gcc  [...] 
> > -mfloat-abi=softfp [...]
> > populate_sdk:
> >         export CC=="arm-poky-linux-gnueabi-gcc  [...] 
> > -mthumb-interwork -mfloat-abi=hard [...]
> 
> Could you please try, before building the U-Boot, todo:
> 
> unset CFLAGS
> unset LDFLAGS
> 
> and rebuild?
> 
I actually ran make with:

	make LDFLAGS="" CC="${CC}"

due to libgcc path not being resolved. I even tried the USE_PRIVATE_LIBGCC
option but u-boot still wouldn't come up.

> -- 
> Otavio Salvador                             O.S. Systems
> http://www.ossystems.com.br        http://code.ossystems.com.br
> Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750
>