rust_ios_bitcode.sh

# Lifted from https://news.ycombinator.com/item?id=14305084

% cat test.rs
    fn main() {
        println!("Hello, world!");
    }
    % rustc --emit llvm-bc -C lto test.rs
    % LIB=$HOME/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib
    % xcrun --toolchain XcodeDefault clang -o test test.bc ~/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liballoc_jemalloc-ea49ffd3fee5264c.rlib
    warning: overriding the module target triple with x86_64-apple-macosx10.12.0 [-Woverride-module]
    1 warning generated.
    % ./test
    Hello, world!
    % rustc --version
    rustc 1.18.0-nightly (91ae22a01 2017-04-05)
    % xcrun --toolchain XcodeDefault clang --version
    Apple LLVM version 8.1.0 (clang-802.0.42)
    Target: x86_64-apple-darwin16.6.0
    Thread model: posix
    InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin