Make Error at src/widgets/CMakeLists.txt:22 (target_link_libraries):
  The keyword signature for target_link_libraries has already been used with
  the target "widgets".  All uses of target_link_libraries with a target must
  be either all-keyword or all-plain.

  The uses of the keyword signature are here:

   * CMakeLists.txt:236 (target_link_libraries)

CMake Error at src/widgets/CMakeLists.txt:46 (target_link_libraries):
  The keyword signature for target_link_libraries has already been used with
  the target "virtual".  All uses of target_link_libraries with a target must
  be either all-keyword or all-plain.

  The uses of the keyword signature are here:

   * CMakeLists.txt:236 (target_link_libraries)