Merge branch '350-build-system-handle-empty-variants-blocks' into 'master'
Resolve "build-system: handle empty variants blocks"
Closes #350 (closed)
See merge request !347 (merged)
(cherry picked from commit ffbc6292)
047d55d8 build-system: bugfix: handle empty variants
Co-authored-by: gsell achim.gsell@psi.ch