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I'm using the Catch2 testing framework in my project. It comes with a CMake module in a subdirectory /contrib, and I have multiple subprojects that would like to link to it and call the scripts in that module directory. I tried this bit of code to do that in my subproject's CMakeLists.txt files.

Instead of hardcoding the directory, I want to call get_target_property(locationOfCatch Catch2::Catch2 SOURCE_DIR) then append it to the CMAKE module path after a slight string edit.

This is what I get though:

CMake Error at extern/tuvok/tests/CMakeLists.txt:35 (get_target_property):
  INTERFACE_LIBRARY targets may only have whitelisted properties.  The
  property "SOURCE_DIR" is not allowed.

Hmphhh.

Thanks.