Re: 440 ebony patch seems to have broken 85xx build on powerpc.git

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Nothing is telling GCC what CPU to compile for, so it
will just use the compiler's default, which very likely
is not what you want. =A0For files that will only ever
be used on 440, the correct flags are -mcpu=3D440 -Wa,-m440 .

We could add that to the per-file flags already, right?

I think it should really use -mcpu=3Dpowerpc on all files.
The problem that Dave saw was the result of using a compiler
that defaults to -mcpu=3D8540, which uses instruction that
don't work on 440.

No, those options _do_ work on 440, but the -mbooke
assembler flag disallows isel (since it is an optional
insn).

The common files really need to be built with -mcpu flags that
make the code work on any system if you want to be able
to use just a single boot wrapper binary for all.

On any system where they can run at all, yes.  It should
be fine to compile a 440-only file with 440-specific flags.


Segher