Created attachment 128233 [details]
an example project

SUMMARY
since CMake 3.16

STEPS TO REPRODUCE
1. Create CMake Project
2. use target_precompile_headers as intended (make sure you use the header)
3. build the project

note : I will leave an example project attached

OBSERVED RESULT
It builds successfully but the auto-comp and the parser show an error because the headers is not #include-d (it's force included by cmake though)

EXPECTED RESULT
the auto-comp and the parser should, parse and include the the pre-compiled header (and possibly generate it as needed) for target's source code without manually #include

ADDITIONAL INFORMATION
https://cmake.org/cmake/help/latest/command/target_precompile_headers.html