CMake Error at incompatible-features2.cmake:[0-9]+ \(add_library\):
  Impossible to link target 'lib' because the link item 'dep1', specified
  without any feature or 'DEFAULT' feature, has already occurred with the
  feature 'feat2', which is not allowed.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)