RE: building 3.4.0 for powerpc-elf target

["Dave Murphy" <wintermute2k4 at ntlworld dot com>]

> -----Original Message-----
> Subject: Re: building 3.4.0 for powerpc-elf target

> Dave Murphy wrote:
> > C:/DOCUME~1/DAVEM~1.NEU/LOCALS~1/Temp/ccszaaaa.s:41: Error: unsupported
> > relocation against null
>
> The libgcc2.s file has obvious problems.
>          stw 0,12((null))
> (null) isn't a valid register name.  It looks like your C library prints
> null pointers as "(null)".
>
> I can build a x86-linux hosted powerpc-elf cross compiler which works
> OK.  I didn't use any configure options or set any environment flags.

Building under linux works fine for me too.

> It appears that something got miscompiled on your end.  I suggest that
> you try debugging it.  Put a break point in print_operand and step
> through it.  The error is probably much earlier though.  I suspect that
> the reg_names array is not getting initialized correctly.  It gets
> initialized with a constant initializer in regclass.c.  Maybe it is
> getting clobbered at some point while the compiler is running.

I've since managed to fix this problem by using the MinGW patches. Currently
I'm not 100% sure what actually fixed the issue but I believe it may have
been related to the -save-temps issue as per
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5620 When I used -save-temps to
generate the pre-processed source for my original query there wasn't an
error and I hadn't found a 3.4 suitable variant of the patch at that point.

Dave