Re: -mcpu vs. binutils 2.13.90.0.18

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

Guido Guenther wrote:
[snip]
> > -march=BAR:
> > Allow opcodes for CPU BAR in addition to the ISA ones.
> > 
> > -mtune=BAZ:
> > Optimize opcode scheduling for CPU BAZ.
> 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.


Thiemo