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From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: Please pull from 'for_paulus' branch
Date: Fri, 29 Jun 2007 11:51:02 +0200
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org, Arnd Bergmann <arnd@arndb.de>
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>> It is not.  -mcpu=powerpc64 doesn't select an ABI, and your
>> GCC presumably defaults to the 32-bit ABI.  Use -m64 on the
>> GCC command line, too, you need it, and it solves this issue
>> as a side effect.
>
> No, actually the command line had -m64 on it.  The situation is this:
>
> gcc -m64 -mtune=power4 works
> gcc -m64 -mcpu=powerpc64 -mtune=power4 fails.
>
> The problem is in the spec file where it works out what parameters to
> pass to `as'.  Without any -mcpu it correctly defaults to passing
> -mppc64 (when -m64 is given).  It then also has a list of -mcpu values
> and the corresponding flag to pass to as, but powerpc64 isn't in that
> list.  Thus with -mcpu=powerpc64 we don't get -mppc64 passed to as.

Oh okay, badness.  What's the GCC PR #?


Segher