macOS installer: unexpected prefix @executable_path

[tkemmer]

install_name_tool does not seem to like @executable_path any longer.

CPack: Create package using DragNDrop
CPack: Install projects
CPack: - Run preinstall target for: BALL
CPack: - Install project: BALL
ERROR: Unexpected prefix "@executable_path"
ERROR: Unexpected prefix "@executable_path"
ERROR: Unexpected prefix "@executable_path"
ERROR: Unexpected prefix "@executable_path"
ERROR: Unexpected prefix "@executable_path"

XCode 9.3

[tkemmer]

Note: This "ERROR" does not prevent the package from being built. Thus, packaging on macOS still works.