Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:michals:mingw/openSUSE_Tumbleweed/home:michals:mingw.repo
zypper refresh
zypper install mingw64-gcc
Para 16.0 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:michals:mingw/16.0/home:michals:mingw.repo
zypper refresh
zypper install mingw64-gcc
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:michals:mingw/15.6/home:michals:mingw.repo
zypper refresh
zypper install mingw64-gcc