This OPAM repository contains a macOS toolchain featuring OCaml 4.14.2. The supported build system is GNU/Linux. The supported target systems are 64-bit Intel or Apple Silicon Macs.
Set up a macOS cross toolchain
by following the instructions in the linked project. Add the toolchain bin
directory to your PATH.
Extract the macOS SDK to your Linux host. If you don't have access to a Mac, follow
these instructons.
Otherwise, find the SDK path xcrun --show-sdk-path on your Mac and copy the SDK to
the Linux host. Below we assume that the SDK is available
in $HOME/src/cross/sdks on Linux.
For macOS cross-compiling, switch to a regular OCaml compiler (its version must match the version of the cross-compiler):
opam switch 4.14.2
eval `opam env`
or create a new switch:
opam switch create 4.14.2-macos 4.14.2
eval `opam env`
Add this repository to OPAM:
opam repository add macos git://github.com/dboris/opam-cross-macos
Configure the compiler for Intel Macs:
ARCH=amd64 SUBARCH=x86_64 SDK=13 VER=12.7.0 SDK_DIR=$HOME/src/cross/sdks TOOLPREF=x86_64-apple-darwin22.4 \
opam install conf-macos
or for Apple Silicon Macs:
ARCH=arm64 SUBARCH=arm64 SDK=13 VER=12.7.0 SDK_DIR=$HOME/src/cross/sdks TOOLPREF=aarch64-apple-darwin22.4 \
opam install conf-macos
Some options can be further tweaked:
SDKspecifies the SDK version being usedVERspecifies the value of the-mmacos-version-mincompiler switch, ie the minimum macOS version on which the compiled code will runTOOLPREFspecifies the toolchain prefix of the macOS cross toolchainSDK_DIRspecifies the directory containing the macOS SDK
The options above are recorded inside the conf-macos package, so make sure to
reinstall that package if you wish to switch to a different toolchain.
Install the compiler:
opam install ocaml-macos
This project is based on opam-cross-ios and credit goes to its original developers. For further background and instructions how to port OCaml packages to macOS see here.