Jonathan Brielmaier <jonathan.brielmaier@web.de> writes:

> On 10/16/18 8:08 PM, 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
>> 
>
> Note that Marius Bakke started a branch to update guix to gcc7:
> https://git.savannah.gnu.org/cgit/guix.git/log/?h=wip-gcc7
>
> This could be maybe a good starting point. The bug number is: bug#32953

Note that the cross-toolchain is broken in that branch, so it won't get
very far.  I hope to resolve that in the coming weeks and merge it to
'core-updates-next'.

Efraims suggestion is probably the best bet for now.