This log has "-mtune=option: not valid". I guess something
has changed
here with gcc 9 that the cmake script doesn't like?
I've tailored a patch for CMakeLists.txt to fix the build [1]. If you
agree, I'll push to SCM (including update to v5.1.0) and build it.
Björn
[1]
https://koji.fedoraproject.org/koji/taskinfo?taskID=32767716