CMake looking for nonexistent oF source file

[small-pants]

Using this on linux leads to the following CMake build errors in CLion:

Cannot find source file:

    /home/jp/openFrameworks/libs/openFrameworks/graphics/ofPolyline.cpp

   Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx
   Call Stack (most recent call first):
  /home/jp/openFrameworks/addons/ofxCMake/modules/main.cmake:45 (include)
  CMakeLists.txt:44 (include)


CMake Error: Cannot determine link language for target "of_static".
CMake Error: CMake can not determine linker language for target: of_static
CMake Error: CMake can not determine linker language for target: of_shared
CMake Error: Cannot determine link language for target "of_shared".

According to the oF repository, there is no such file ofPolyline.cpp. There is only a header and it still cannot find it.

Not sure the reason for the other errors.

[missing-user]

Some of the source files in the newer versions of OpenFrameworks have renamed a few files to the .inl Ending instead of .cpp
I changed the file endings in the following two lines in /modules/openFrameworks.cmake to make it work:

${OF_DIRECTORY_ABSOLUTE}/libs/openFrameworks/3d/ofMesh.cpp ${OF_DIRECTORY_ABSOLUTE}/libs/openFrameworks/graphics/ofPolyline.cpp
were changed to
${OF_DIRECTORY_ABSOLUTE}/libs/openFrameworks/3d/ofMesh.inl ${OF_DIRECTORY_ABSOLUTE}/libs/openFrameworks/graphics/ofPolyline.inl