[bug#40264] Linphone: 14-add-linphoneqt-v7

[Raghav Gururajan]

Hi Danny!

> if we add gcc 5 here, do we need to do something similar to
> https://lists.gnu.org/archive/html/guix-commits/2020-04/msg00774.html too or
> not?
> 
> Why is only gcc 5 working and not gcc 7?

The requirement for gcc 5 is related to Qt. It has something to do with C++ 
standard. The Qt package in qt.scm uses gcc 5 instead of gcc 7.

The reason for gcc 7 working for linphoneqt on core-updates, could also be due 
to updates in qt.

Regards,
RG.