CMake Error at incompatible-library-features1.cmake:[0-9]+ \(add_library\):
  Impossible to link target 'lib1' because the link item 'dep1', specified
  with the feature 'feat1', has already occurred without any feature or
  'DEFAULT' feature, which is not allowed.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)