| CMake Error at CMP0028-NEW-iface.cmake:6 \(add_library\): | |
| Target "foo" links to target "External::Library" 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:3 \(include\) |