[U-Boot] U-Boot PXA support

[Tom Rini]

Hey folks,

I'm attempting, again, to see what we need to do in order to use gcc-8.x
for U-Boot and ran into, again:
https://patchwork.ozlabs.org/patch/920329/ which in short is that when
using -mcpu=xscale gcc-8.x throws an odd error:
cc1: error: switch -mcpu=xscale conflicts with -march=armv5te switch [-Werror]

Now note, U-Boot isn't passing -march= at all, just -mcpu=xscale which
suggests perhaps something broke in upstream gcc.  Looking at the
kernel, it's not used -mcpu=xscale ever, just -mtune=xscale but that
leads to different failures (seen here with gcc-7.3):
  CC      drivers/usb/gadget/pxa25x_udc.o
{standard input}: Assembler messages:
{standard input}:779: Error: selected processor does not support `pld [lr]' in ARM mode
{standard input}:1201: Error: selected processor does not support `pld [r7]' in ARM mode
{standard input}:2519: Error: selected processor does not support `pld [r3]' in ARM mode
{standard input}:2796: Error: selected processor does not support `pld [r3]' in ARM mode

So, what should we do about this?  Is there still active interest in
supporting the PXA platforms?  Thanks folks!

-- 
Tom
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