XCFramework build for apple (#93)

build-apple.sh

@@ -0,0 +1,44 @@
+#! /bin/sh
+
+echo "Setting up the rust environment..."
+rustup target add aarch64-apple-ios aarch64-apple-ios-sim x86_64-apple-ios x86_64-apple-darwin aarch64-apple-darwin
+cargo install cbindgen
+
+echo "Building..."
+cargo build --release --target x86_64-apple-darwin
+cargo build --release --target aarch64-apple-darwin
+cargo build --release --target aarch64-apple-ios
+cargo build --release --target x86_64-apple-ios
+cargo build --release --target aarch64-apple-ios-sim
+
+echo "Generating includes..."
+mkdir -p target/include/
+cbindgen --config cbindgen.toml -l C -o target/include/tun2proxy.h
+cat > target/include/module.modulemap <<EOF
+framework module Tun2Proxy {
+    umbrella header "tun2proxy.h"
+
+    export *
+    module * { export * }
+}
+EOF
+
+echo "lipo..."
+echo "Simulator"
+lipo -create \
+target/aarch64-apple-ios-sim/release/libtun2proxy.a \
+target/x86_64-apple-ios/release/libtun2proxy.a \
+-output ./target/libtun2proxy-ios-sim.a
+echo "MacOS"
+lipo -create \
+target/aarch64-apple-darwin/release/libtun2proxy.a \
+target/x86_64-apple-darwin/release/libtun2proxy.a \
+-output ./target/libtun2proxy-macos.a
+
+echo "Creating XCFramework"
+rm -rf ./target/Tun2Proxy.xcframework
+xcodebuild -create-xcframework \
+-library ./target/aarch64-apple-ios/release/libtun2proxy.a -headers ./target/include/ \
+-library ./target/libtun2proxy-ios-sim.a -headers ./target/include/ \
+-library ./target/libtun2proxy-macos.a -headers ./target/include/ \
+-output ./target/Tun2Proxy.xcframework