[CMake] cmake doesn't run all tests

[hex]

hello Eric,

Some of my recent changes prevented my function to add a build target. 
It was building either one or the other but not both. Therefore, half of 
the tests where missing.

You are right it is working correctly now.

thank you for your patience.

> This should work at least it "works-for-me" so there must be some 
> difference between the CMakeLists.txt in the directory that works and 
> in the directory that does not.
> Do you have a sample setup which exhibit the issue that you can share?
>
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