^CMake Error at CMP0079-link-NEW-bogus.cmake:[0-9]+ \(add_executable\):
  Target "top" links to target "foo::@<0xdeadbeef>" but the target was not
  found.  Perhaps a find_package\(\) call is missing for an IMPORTED target, or
  an ALIAS target is missing\?
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)