Add initial script for creating XCFramework

xcode/genXCFramework.zsh

@@ -0,0 +1,28 @@
+#!/usr/bin/env zsh
+# TODO Support iOS simulator
+
+# setup build dirs
+rm -rf ./build
+mkdir -p ./build/{ios,macos}
+
+# cd to Go source
+cd ..
+
+# build static archive for all platforms
+## iOS
+CGO_ENABLED=1 GOOS=ios SDK=iphoneos go build -buildmode=c-archive
+mv ./{cmutton.a,cmutton.h} ./xcode/build/ios/
+cp ./types.h ./xcode/build/ios/
+## macOS
+CGO_ENABLED=1 GOOS=darwin go build -buildmode=c-archive
+mv ./{cmutton.a,cmutton.h} ./xcode/build/macos/
+cp ./types.h ./xcode/build/macos/
+
+# cd to xcode build dir and build XCFramework
+cd ./xcode/build
+xcodebuild -create-framework \
+    -library ./ios/cmutton.a \
+    -headers ./ios/cmutton.h \
+    -library ./macos/cmutton.a \
+    -headers ./macos/cmutton.h \
+    -output cmutton.xcframework