gcc7 from home:steffens:lvermgeo:firefox:gcc7 project
Select Your Operating System
Add repository and install manually
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:steffens:lvermgeo:firefox:gcc7/openSUSE_13.1/home:steffens:lvermgeo:firefox:gcc7.repo zypper refresh zypper install gcc7