Build fails with `lcov` about cmake-scripts

[StableCoder]

This looks to be an issue with the signature of GreeterTests

It looks like, wherever you've used target_link_libraries it hasn't been using the PRIVATE/INTERFACE/PUBLIC keywords, ala:

target_link_libraries(GreeterTests *library*)

rather than something like

target_link_libraries(GreeterTests PRIVATE *library*)

and the issue is that CMake enforces them all to be one style or the other. The code-coverage code is assuming that, unless it is specified as PUBLIC or INTERFACE at the call point, that it should be PRIVATE by default.

The reason it's only here is because only the GCC variant needs to link to an external library gcov. LLVM doesn't need to link into any external library.

Unfortunately, I can't see a way to programmatically determine if a keyword has been used to previous calls, so I'm going to keep the current behavior as-is.

To fix your case specifically, just add the appropriate keywords at the other callpoints to target_link_libraries for GreeterTests

[mscofield0]

With target_link_libraries(GreeterTests PRIVATE doctest::doctest Greeter::Greeter):

code-coverage.cmake:447 (add_dependencies):
  The dependency target "ccov-report-GreeterTests" of target "ccov-report"
  does not exist.