ubuntu 20.04/openSUSE Leap 15.3 has a cmake, which is not recent enough anymore for the version required by the rawspeed devs:
[ 308s] CMake Error at src/external/rawspeed/CMakeLists.txt:1 (cmake_minimum_required):
[ 308s] CMake 3.18 or higher is required. You are running version 3.17.0