You need XCode 5.

Build Rust cross-compiler:

mkdir build_ios; cd build_ios
../configure --target=arm-apple-ios,i386-apple-ios
make VERBOSE=1

Once compilation complete you can use it.

To target device:

rustc --target=arm-apple-ios foo.rs

To target simulator:

rustc --target=i386-apple-ios foo.rs

• all Rust superpowers
• exception handling
• LLDB debugging
• green tasks

• works only for armv7 architecture, armv7s and arm64 will be added soon.
• segmented stack is disabled that means no stack protection available

• Sample of using Rust from Objective C + Makefile for simulateous compiling for both device and simulator