Building JSSC on Mac.md

1. Install MacOS 10.15.7 Catalina in an Intel Virtual Machine
2. Install XCode Command Line tools

   xcode-select --install

3. Extract Xcode_12.4.xip (this can take while)
4. Copy newly extracted XCode.app to /Applications
5. Download Xcode_6.2.dmg, XCode (right click), Show package contents
6. Browse to Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs and copy to /Library/Developer/CommandLineTools/SDKs
7. Accept the xcodebuild license

   sudo xcodebuild -license

8. Install Homebrew

   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

9. Install dependencies

   brew install maven openjdk cmake
   ###                ^-- TODO: install openjdk@11, configure maven to use it!
   
   # Note, Tigerbrew may work if Homebrew drops support
   # Note, Homebrew is NOT needed, these can all be installed manually if needed

10. Clone the repository

    git clone https://github.com/java-native/jssc

11. Setup the SDKROOT

    SDKROOT

    export MACOSX_DEPLOYMENT_TARGET=10.8
    export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX10.9.sdk 

12. Build for x86_64:

    mvn -P x86_64

13. Build for ARM64 (aarch64, M1, etc):

    export MACOSX_DEPLOYMENT_TARGET=11.0
    export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk 
    
    mvn -P aarch64

14. Copy the binary file to the source tree

    cp target/cmake/jssc.dylib src/main/resources-precompiled/x86_64/

15. Commit the changes and push to a branch.