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Re: Multilib problem


Cody, Danny, list,

On Fri, Jan 24, 2014 at 2:28 PM, Cody P Schafer <dev@codyps.com> wrote:
>
>
> On 01/23/2014 02:37 PM, Danny Gale wrote:
>>
>> Hi all,
>>
>> I've successfully compiled my powerpc64-e6500-linux-gnu toolchain!
>> Hooray! :)
>>
>> Now, the trouble is that U-Boot doesn't support 64-bit powerpc builds,
>> so the toolchain needs to have multilib enabled. The compiler itself is
>> built with no problem, but during the "Building for multilib
>> subdir='32'" step, the build fails with this error:
>
>
> The problem with multilib on powerpc (and x86, and possibly others) is that
> glibc (and probably other libcs) use the target to determine which api to
> build for the arch. To explain: powerpc64-e6500-linux-gnu passed to glibc's
> configure will always try to build a 64bit libc. One needs to pass
> powerpc-e6500-linux-gnu and then override the place to find CC,LD, and the
> like as well as the result directory. The only crossbuild tool I know of
> that actually is able to do this is gentoo's "crossdev". I've been working
> on some patches to try to get similar functionality in crosstool-ng, but
> they're nowhere near ready (https://bitbucket.org/jmesmon/crosstool-ng-pq/
> is my patchqueue which includes them).

These patches look good, I'll pull them in and give some feedback, if
that's helpful.
Want to send a config your using, or add the e6500 config to your mq?

I'd rather help with on-going effort then start from scratch.

-Bryan

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