CMake Error at add_custom_command.cmake:[0-9]+ \(add_custom_command\): Error evaluating generator expression: \$ \$ may only be used with binary targets to specify link libraries through 'LINK_LIBRARIES', 'INTERFACE_LINK_LIBRARIES', and 'INTERFACE_LINK_LIBRARIES_DIRECT' properties. Call Stack \(most recent call first\): CMakeLists.txt:[0-9]+ \(include\)