Re: Trying to crosscompile for POWER9

[Tobias Platen <trisquel@platen-software.de>]

It is the same error in both cases.
the binary128 type is not avialable in gcc, but requires for glibc to build.
Im now trying out the GCC 7 branch

On 10/20/2018 08:31 PM, Efraim Flashner wrote:
> On Sat, Oct 20, 2018 at 05:05:35PM +0200, Tobias Platen wrote:
>>
>>
>> On 10/16/2018 08:24 PM, Efraim Flashner wrote:
>>> On Tue, Oct 16, 2018 at 08:08:27PM +0200, Tobias Platen wrote:
>>>> Hello,
>>>>
>>>> When I try to compile GUIX for POWER9 an old version of GCC is used.
>>>> How do I use the gcc version used for cross compiling.
>>>>
>>>> ./pre-inst-env guix build --target=powerpc64le-linux hello
>>>>
>>>> checking if powerpc64le-linux-gcc supports
>>>> binary128 floating point type... no
>>>> checking if the target machine is at least POWER8... yes
>>>>
>>>> configure: error: ***
>>>> binary128 floating point type (GCC >= 6.2) is required on powerpc64le.
>>>>
>>>> Tobias "Tomoko" Platen
>>>>
>>>
>>> I'd recommend starting by editing gnu/packages/make-bootstrap.scm:103
>>> and change the line:
>>> `(("cross-gcc"      ,(cross-gcc target
>>> to:
>>> `(("cross-gcc"      ,(cross-gcc target #:gcc-6
>>>
>>> there are other places, like lines 110 and 391 (and possibly others) which
>>> should be turned to (inherit gcc-6)
>>>
>>> That should work for this round, then you can decide if it's worth
>>> upstreaming and wrap it in 'match' keywords for some of the newer
>>> architectures (like riskv).
>>>
>> It still fails after changing to gcc 6
> 
> Where does it fail? It'd be nice if we can get it to work.
>