1. Determine the PrivateFramework to interact with to achieve the end goal.

2. get the runtime headers for the framework you chose from github and place them in the "include" folder in the project directory.

• Add the folders <NAME>.framework/headers in the project include directory.
• drag+drop all of the headers from github into the <NAME>.framework/headers folder.
• In CMakeLists.txt, add ./include/<NAME>.framework to target_include_directories.

Your target_link_libraries call in CMakeLists.txt should look something like this...

target_link_libraries(APFIExperiment
 "-framework Foundation"
 "-iframework /System/Library/PrivateFrameworks -framework CoreBrightness"
 )

Where CoreBrightness gets replaced with the name of the name of the framework you chose.

The -iframework flag simply gives CMake context as to where the private framework is located.

• If clang has a problem with #import "NSObject.h", it seems you can just comment it out in the header and you'll be fine.
• Replacing all the unknown types/structs with the type id seems to satisfy the compiler. I don't exactly know what to do in the circumstance where they are required to achieve the task at hand though–because they usually aren't defined anywhere in the header dump.