Cross compilation of *quads project from Linux to OSX

Initially I thought it would be enough to just add rust target, but it expects for linker to have support of -framework flag and needs MacOS SDK. cargo-zigbuild comes to the rescue.

🔗Add target:

rustup target add x86_64-apple-darwin

🔗Download necessary sdk

Luckly there is this repo with all macos sdks versions. Use needed version. Replace it in the lines below.

curl -L https://github.com/roblabla/MacOSX-SDKs/releases/download/13.1/MacOSX13.1.sdk.tar.xz | tar xJ

🔗Install Zig language compiler

Using this guilde for your distribution. For Ubuntu 20.04 it was:

snap install zig --classic --beta

🔗Install zigbuild

Zig provides C cross compiler with stdlib headers and linkers for every platform, so zigbuild empowers rust with ability to link binaries for other platforms almost without restrictions.

cargo install --locked cargo-zigbuild

🔗Set SDKROOT for zigbuild to find frameworks

Add this to .bashrc if needed (replace $(pwd) of course)

🔗For OSX:

export SDKROOT=$(pwd)/MacOSX13.1.sdk/

🔗Cross-compile using zig as linker

cargo zigbuild --release --target x86_64-apple-darwin

🔗Example