[PATCH] MIPS: gas: alter 64 or 32 for r6 triples if march is implicit

[Maciej W. Rozycki]

On Sat, 6 May 2023, Jiaxun Yang wrote:

> >> Hmm, why people wants to build n32 binary on mips32r6 CPU?
> > 
> > I guess o32 toolchain should not work only for 32bit CPU?
> 
> In this case people should override -march option themself, not rely on random
> toolchain hacks, since it’s not determinant from user’s perspective what “fallback”
> march it will be, especially in case the toolchain is not designed for base ISA.

 Seconded.  If anyhow, I'd suggest changing the arrangement the GCC way, 
that is by adding `--with-arch-32=' and `--with-arch-64=' configuration 
options.  I'm not terribly convinced however that would be a worthwhile 
improvement, because GAS shouldn't normally be invoked directly, and when 
called via the GCC driver the driver will do the right thing.

 YunQiang, do you actually have a use case for invoking GAS directly?  I 
only do it when debugging GAS, which is sort of irrelevant.  For normal 
compilations I never do it.

  Maciej