Make sure expected versions are defined for all compilers.
Merge topic 'compiler-version-genex' into next

4806ffc Make sure expected versions are defined for all compilers.
Add generator expressions for compiler versions.

New generator expressions allow retrieval of the version per language,
as well as equality comparison.
Merge topic 'compiler-version-genex' into next

47a8db5 Add generator expressions for compiler versions.