From 15990d52b63adbca0fda5b917d8eadeea65a1c34 Mon Sep 17 00:00:00 2001
From: jb-alvarado <jb@pixelcrusher.de>
Date: Thu, 24 Mar 2022 14:49:42 +0100
Subject: [PATCH] add cross compile support for macOS

---
 .cargo/config     |  7 +++++++
 docs/developer.md | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 .cargo/config

diff --git a/.cargo/config b/.cargo/config
new file mode 100644
index 00000000..4391721d
--- /dev/null
+++ b/.cargo/config
@@ -0,0 +1,7 @@
+[target.x86_64-apple-darwin]
+linker = "x86_64-apple-darwin20.4-clang"
+ar = "x86_64-apple-darwin20.4-ar"
+
+[target.aarch64-apple-darwin]
+linker = "aarch64-apple-darwin20.4-clang"
+ar = "aarch64-apple-darwin20.4-ar"
diff --git a/docs/developer.md b/docs/developer.md
index 81960d5b..a6e6bded 100644
--- a/docs/developer.md
+++ b/docs/developer.md
@@ -28,3 +28,29 @@ Running `cargo build` ends up in a binary which depend on **libc.so**. But you c
 Compile with: `cargo build --release --target=x86_64-unknown-linux-musl`.
 
 This release should run on any Linux distro.
+
+### Compile from Linux for macOS
+
+Add toolchain:
+
+```Bash
+# for arm64
+rustup target add aarch64-apple-darwin
+
+# for x86_64
+rustup target add x86_64-apple-darwin
+```
+
+Follow this guide: [rust-cross-compile-linux-to-macos](https://wapl.es/rust/2019/02/17/rust-cross-compile-linux-to-macos.html)
+
+Or setup [osxcross](https://github.com/tpoechtrager/osxcross) correctly.
+
+Add **osxcross/target/bin** to your **PATH** and run cargo with:
+
+```Bash
+# for arm64
+CC="aarch64-apple-darwin20.4-clang -arch arm64e" cargo build --release --target=aarch64-apple-darwin
+
+# for x86_64
+CC="o64-clang" cargo build --release --target=x86_64-apple-darwin
+```