[OpenBIOS] starting

[Blue Swirl]

On Mon, Oct 4, 2010 at 4:14 AM, Segher Boessenkool
<segher at kernel.crashing.org> wrote:
>>>> BTW, there is a bug in one of the tools (binutils, gcc, gdb, can't
>>>> remember which): if you want the tool for powerpc64, the only
>>>> supported target is powerpc64-linux, powerpc64-elf won't work.
>
> It's not a bug: it actually is not supported.  There is no ABI
> defined for "generic" powerpc64-elf!
>
>>> It's GCC that doesn't know powerpc64-elf or powerpc64-eabi.
>
>
>>> Does anyone have any pointers how to set up
>>> $PREFIX/powerpc-linux/include
>>> etc. without access to a working ppc Linux system? GCC 4.4.5
>>> --target=powerpc64-linux build is failing during libdecnumber
>>> compilation
>>> for lack of string.h and stdio.h.
>
> Configure GCC with --disable-decimal-float .
>
> For building a "bare-metal" toolchain, without support for
> any OS or libc, you can use my
> http://git.infradead.org/users/segher/buildall.git .
>
>> In theory, adding powerpc64-elf support to GCC should be a matter of
>> adding a target Makefile fragment (t-elf64) to gcc/config/rs6000,
>> maybe some other small changes.
>
> And define an ABI, maybe not so little work ;-)

How about reusing a decent existing ABI? We don't export any binary
interfaces, internally the ABI will be used at least by .S files.