Re: -mcpu vs. binutils 2.13.90.0.18

[Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de>]

Guido Guenther wrote:
[snip]
> > > So to build kernels for say IP22 R5k I'd change the current
> > >   GCCFLAGS += -mcpu=r5000 -mips2 -Wa,--trap
> > > to 
> > >   GCCFLAGS += -mabi=o32 -march=R5000 -mtune=R5000 -Wa,--trap
> > > where as for R4X00 I use
> > >   GCCFLAGS += -mabi=o32 -march=R4600 -mtune=R4600 -Wa,--trap
> > > Correct?
> > 
> > Yes, this should work. You can leave the -mtune out, since it defaults
> > to the value of -march anyway.
> Just for completeness: I had to use:
>       GCCFLAGS += -mabi=32 -march=r4600 -mtune=r4600 -Wa,--trap
> to make gcc-3.3 happy (note the 32 instead of o32).

Yes, IIRC 64 vs. n64 has the same problem.

> gcc-3.2 doesn't seem
> to handle these options correctly at all.

AFAICS you can still drop the -mtune part.


Thiemo