[patch] MIPS/Linux: Clean up cpp ABI dependencies

[Richard Sandiford]

Alexandre Oliva <aoliva@redhat.com> writes:
>> -#if (_MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 64 /* o64??? */) \
>> -    || _MIPS_SIM == _MIPS_SIM_ABI64
>> +#if _MIPS_SIM == _MIPS_SIM_ABI64
>
> I'm a bit worried about these changes.  I think they were in place as
> a tentative o64 port that never got completed.  I don't exactly oppose
> the change, but I don't want us to unintentionally remove it.

Pointers are 32 bits in o64, not 64, so I don't see how this ever
made sense.  Perhaps o64 with -mlong64?

> As I wrote before, using GCC-internal macros is a sure way to
> get burnt when they change.  Since they changed once and broke our use
> thereof, I'd rather steer away from them and stick with well-defined
> ABI macros, that GCC is not going to mess with, ever.

Can you just remind me what change you mean here?

Richard