[m-rev.] for pre-commit review: workaround Mantis bug #453

[Peter Wang]

On Sun, 19 Jan 2020 18:12:02 +1100 (AEDT), Julien Fischer <jfischer at opturion.com> wrote:
> 
> For pre-commit review by Peter.
> 
> In particular:
> 
> - should we instead handle this by forcing the use of gcc -O0 in asm_fast 
> grades on affected systes?

Only in PIC mode.

We might want to disable the combination of gcc + asm_fast + x86 + PIC,
or silently make asm_fast work like reg in that case.

> 
> - are there other systems that this workaround needs to be applied to?

AIUI the problem should not be specific to Linux, but I haven't checked
on any other OS yet.

Peter