ios-samples/BindingSample/NativeProject

XMBindingLibrary Native Project

This project contains the following items:

• XMBindingLibrary.xcodeproj
  This is the Xcode project file.
• Makefile
  The Makefile that will create a fat archive.

Building the Native Library

To compile the Xcode Project and binding classes execute the make command from the root directory.

The make command will:

• Compile the Xcode Project for ARMv7, ARM64 (Devices), i386 and x86_64 (Simulators) using xcodebuild
• Create a multi-architecture binary using lipo

Creating a Universal Binary

A "fat" or multi-architecture library is a compiled binary that is usable on multiple targets, for example: ARMv7, ARM64 (Devices), i386 and x86_64 (Simulators). In this sample we illustrate how to create a universal binary in two ways:

Using lipo

Once we have built our library against the desired architectures we can create the universal binary via lipo. This will create a "universal" file from the architecture specific inputs we have provided. For instance:

lipo -create libNative-armv7.a libNative-arm64.a libNative-i386.a libNative-x86_64.a -output libNative.a

Similarly, in our Makefile script we have lipo -create -output $@ $^ which will take the libraries compiled for ARM64, ARMv7, i386 and x86_64 using xcodebuild and output them to the current directory with the name of our build target.

Using Xcode

In our Xcode project we have created a separate Build Target that will execute a post build Run Script to output a "universal" file.