Meson is a build system designed to optimise programmer productivity.
It aims to do this by providing support for software development tools and practices, such as unit tests, coverage reports, Valgrind, CCache and the like.
Supported languages include C, C++, Fortran, Java, Rust.
Build definitions are written in a non-turing complete Domain Specific Language.

ATTENTION:
Version 0.61.x is latest version which will build in Leap (reason python 3.6).
Also have comment out in spec ( 15.3 hast rpm 4.14):
- Conflicts: rpm-build < 4.15

Now use newer meson from home:ecsos:python.