[U-Boot] [PATCH v3 19/19] sunxi: update Pine64 README

[Dr. Philipp Tomsich]

> On 20 Apr 2017, at 00:21, Andreas Färber <afaerber at suse.de> wrote:
> 
> Am 18.04.2017 um 22:38 schrieb André Przywara:
>> On 16/04/17 02:20, Andreas Färber wrote:
>>> Build-testing this series with both pine64_plus_defconfig and
>>> orangepi_pc2_defconfig, I ran into a ~1616 size overflow with gcc5. gcc6
>>> worked okay. Would be helpful to document such requirements here.
>> 
>> Can you say which version of GCC 5? I think I used GCC 5.3.0 for a while
>> and this was fine, but I need to re-check this.
> 
> Failure was with a Linaro GCC 5.1.
> 
> Working was Linaro GCC 6.3.1.
> 
> I would happily use our latest SUSE GCC 7.0.1 if only U-Boot had a
> private libgcc for aarch64... :(
> U-Boot tries to use -lgcc for the hello_world example (which I did not
> find a way to suppress other than hacking the Makefile?) and for the
> final u-boot.bin.

Successfully tested with aarch64-unknown-elf based on GCC 6.1.0 and 6.3.0 

Regards,
Philipp.