Doc building for ios

Compilation currently does not link, see #10384.

You need XCode 5.

1. Build Rust:

mkdir build; cd build
../configure --target=arm-apple-darwin
make VERBOSE=1

1. Use Rust:

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

Possible adjustments

• Compilation:
  • Compile twice, with both -arch armv7 and -arch armv7s (A6 processor) ?
    • See https://github.com/ghc-ios/ghc-ios-scripts/blob/master/arm-apple-darwin10-gcc
• Code:
  • src/librustc/back/arm.rs
  • src/rt/arch/arm/record_sp.S

Resources

• https://github.com/mozilla/rust/issues/6170
• ARM Machine Directives: .align
• Building a GHC cross-compiler for Apple iOS targets
• Cross-compilation using Clang
• Doc building for android
• environ.7: _NSGetEnviron()
• iOS ABI Function Call Guide
• llc
• llvm-dis
• Note seeing LLVM output from rust