Demonstration NAPI and prebuildify
Demo taken from https://github.com/nodejs/node-addon-examples/
The helloworld.c is not part of this demo, but added to show
simple Universal (fat) binary compilation and linking.
# our current arch, M1 Mac
$ arch
arm64
# install arm version of node, using 17.1.0
$ nvm install 17.1.0
# install x86_64 version of node, using 17.0.1
$ arch -x86_64 /bin/bash -c "source $HOME/.nvm/nvm.sh; nvm install 17.0.1"
# Change back to arm64 node
$ nvm use 17.1.0
# Install our project, verify it works
$ npm install
$ npm run test
# Make prebuilds and remove temp build dir
$ npm run prebuild-darwin
$ rm -rf build
# Try out arm64 prebuild
$ npm use 17.1.0
$ npm run test
# Try out x86_64 node
nvm use 17.0.1
npm run test
# prebuild dir has universal binary (from 'build' dir)
$ file prebuilds/darwin-x64+arm64/node.napi.node
prebuilds/darwin-x64+arm64/node.napi.node: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit bundle x86_64] [arm64:Mach-O 64-bit bundle arm64]
prebuilds/darwin-x64+arm64/node.napi.node (for architecture x86_64): Mach-O 64-bit bundle x86_64
prebuilds/darwin-x64+arm64/node.napi.node (for architecture arm64): Mach-O 64-bit bundle arm64