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+# Universal XCFramework build example
+
+Below are instructions for building TDLib for iOS, watchOS, tvOS, and also macOS.
+
+If you need only a macOS build for the current architecture, take a look at [TDLib build instructions generator](https://tdlib.github.io/td/build.html).
+
+For example of usage take a look at our [Swift example](https://github.com/tdlib/td/tree/master/example/swift).
+
+To compile `TDLib` you will need to:
+* Install the latest Xcode via `xcode-select --install` or downloading it from [Xcode website](https://developer.apple.com/xcode/).
+  It is not enough to install only command line developer tools to build `TDLib` for iOS. Xcode >= 14.0 is required to build TDLib for watchOS.
+* Install other build dependencies using [Homebrew](https://brew.sh):
+```
+brew install gperf cmake coreutils
+```
+* If you don't want to build `TDLib` for macOS first, you **must** pregenerate required source code files using `CMake` prepare_cross_compiling target:
+```
+cd <path to TDLib sources>
+mkdir native-build
+cd native-build
+cmake ..
+cmake --build . --target prepare_cross_compiling
+```
+* Build OpenSSL for iOS, watchOS, tvOS, and macOS:
+```
+cd <path to TDLib sources>/example/ios
+./build-openssl.sh
+```
+Here we use scripts from [Python Apple support](https://github.com/beeware/Python-Apple-support), but any other OpenSSL build should work too.
+[Python Apple support](https://github.com/beeware/Python-Apple-support) has known problems with spaces in the path to the current directory, so
+you need to ensure that there are no spaces in the path.
+Built OpenSSL libraries should be stored in the directory `third_party/openssl/<platform>`, because the next script will rely on this location.
+* Build TDLib for iOS, watchOS, tvOS, and macOS:
+```
+cd <path to TDLib sources>/example/ios
+./build.sh
+```
+This may take a while, because TDLib will be built about 16 times.
+Resulting XCFramework will work on any architecture and even on a simulator.
+We use [CMake/iOS.cmake](https://github.com/tdlib/td/blob/master/CMake/iOS.cmake) toolchain, other toolchains may work too.
+
+Built libraries and XCFramework will be stored in `tdjson` directory.
+
+Documentation for all available classes and methods can be found at https://core.telegram.org/tdlib/docs.
+
+If you receive an "error: SDK "appletvsimulator" cannot be located", you need to run the command "sudo xcode-select -s /Applications/Xcode.app/Contents/Developer" before running ./build.sh.