I am working on an Xcode project that uses a Calendar framework, here: https://github.com/mmick66/CalendarView.
In the readme is says in order to use the Event system, you need to set custom swift compiler flags in the build settings. For some reason it isn't shown as an option for me.
Here is a screenshot of what I see in my projects build settings.
On the repository is a sample project. When I open that in Xcode, "Swift Compiler - Custom Flags" is one of the sections unlike my project.
Why would this be happening?