^CMake Error in CMakeLists.txt:
  IMPORTED_LOCATION not set for imported target "unknown_lib"( configuration
  "[^"]+")?.
+
CMake Error in CMakeLists.txt:
  IMPORTED_LOCATION not set for imported target "static_lib"( configuration
  "[^"]+")?.
+
CMake Error in CMakeLists.txt:
  IMPORTED_IMPLIB not set for imported target "shared_lib"( configuration
  "[^"]+")?.(
+
CMake Error in CMakeLists.txt:
  IMPORTED_(LOCATION|IMPLIB) not set for imported target "(unknown|static|shared)_lib"( configuration
  "[^"]+")?.)*
+
CMake Generate step failed.  Build files cannot be regenerated correctly.$