Hi, I want to develop an enterprise VPN app with a custom protocol. I'm following the documentation but I have no clue how to start, is there any guide I can follow?

Hi, I want to build an ios app that uses static c libraries. For reference, i did the following as a test: Compiled a simple c date and time program with clang -c -arch arm64 -sysroot <iPhoneOSSDK_path> date.c -o date_arm64.o Created the static lib ar rcs libdatetime_arm64.a date_arm64.o Added the lib in my Xcode project. Added the (.a) file in Build Rules -> Link Binary With Libraries Included the (.a) and (.h) file path in Build Settings -> Search Paths -> Header and Library Search Path Created a Bridging-Header.h file where I added #import "date.h" In my App.swift file, I called the function for getting the date and time let dateTimeStr = String(cString: get_current_datetime()) print("Current Date and Time: \(dateTimeStr)") After doing all the steps above, I am met with the error - Cannot find 'get_current_datetime' in scope Is there any other method to use static c libraries in xcode?