[Buildroot] PowerPC64 toolchain not building

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello Sam,

On Fri, 29 Jan 2016 11:55:30 +1100, Sam Bobroff wrote:

> I've managed to replicate your problem!
> 
> The key to reproducing it seems to be to optimise for size: I compared your
> compile line to mine, and the only difference was -Os vs. -O3 :-)
> 
> So try optimizing for speed instead: this obviously works around it for me ;-)
> 
> And yes, it's the lqarx instruction causing the problem: it's first argument must
> be even but it's 7, so this looks like a bug in gcc.
> 
> I did some searching around and it looks like this has been a problem in the
> past and it's been fixed, but it looks like optimizing for size causes it to
> re-appear. There's a bit of related info here:
> 
> http://comments.gmane.org/gmane.comp.gcc.bugs/388637

Thanks for looking into the problem.

> Would you like to raise it on https://gcc.gnu.org/bugzilla/ ?
> Alternativly, it's no problem for me handle it if you like (I work on PowerKVM
> :-).

Since you actually work on PowerPC, it would be good if you could
report the problem yourself.

Thanks a lot!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com