bug#57109: arm-none-eabi-toolchain atomic support is broken

[Csepp]

Jean Pierre De Jesus DIAZ via Bug reports for GNU Guix <bug-guix@gnu.org> 
writes:

> The following works though. No newlib or anything:
>
> guix shell --expression='((@ (gnu packages cross-base) cross-gcc) 
> "arm-none-eabi")' -- \
>    bash -c "echo '#include <stdatomic.h>' \
>  | arm-none-eabi-gcc -x c -o /dev/null -c -"
>
>
> —
> Jean-Pierre De Jesus DIAZ
>
>
> ------- Original Message -------
> On Wednesday, August 10th, 2022 at 1:14 PM, Jean Pierre De Jesus DIAZ 
> <me@jeandudey.tech> wrote:
>
>
>> The atomic supports for this toolchain is broken:
>> 
>> A minimal test case:
>> 
>> guix shell arm-none-eabi-toolchain -- \
>> bash -c "echo '#include <stdatomic.h>' \
>> 
>> | arm-none-eabi-gcc -x c -o /dev/null -c -"
>> 
>> Something similar found online:
>> 
>> https://sourceware.org/legacy-ml/newlib/2017/msg00150.html
>> 
>> However no solution.
>> 
>> This happens with all versions of the arm-none-eabi-toolchain
>> packages.
>> 
>> —
>> Jean-Pierre De Jesus DIAZ

Might be a good idea to add a (regression) test for this in advance.
Wish I could help, but my expermientation with cross compilation with
Guix were largely fruitless.