Readme.md

   1 # Work in progress cranelift codegen backend for rust
   2
   3 > ⚠⚠⚠ This doesn't do anything useful yet ⚠⚠⚠
   4
   5 ## Building
   6
   7 ```bash
   8 $ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
   9 $ cd rustc_codegen_cranelift
  10 $ git submodule update --init
  11 $ cargo build
  12 ```
  13
  14 ## Usage
  15
  16 ```bash
  17 $ rustc -Zcodegen-backend=$(pwd)/target/debug/librustc_codegen_cranelift.so my_crate.rs --crate-type lib -Og
  18 ```
  19
  20 > You must compile with `-Og`, because checked binops are not yet supported.
  21
  22 ## Building libcore
  23
  24 ```bash
  25 $ git clone https://github.com/rust-lang/rust.git
  26 $ cd rust
  27 $ git apply ../0001-Disable-stdsimd-in-libcore.patch
  28 $ git apply ../0002-Disable-u128-and-i128-in-libcore.patch
  29 $ cd ../
  30 $ ./build.sh
  31 ```
  32
  33 > ⚠⚠⚠ You will get a panic because of unimplemented stuff ⚠⚠⚠
  34
  35 ## Not yet supported
  36
  37 * [ ] Checked binops
  38 * [ ] Statics
  39 * [ ] Drop glue
  40
  41 * [ ] Building libraries
  42 * [ ] Other call abi's
  43 * [ ] Unsized types
  44 * [ ] Slice indexing
  45 * [ ] Sub slice
  46 * [ ] Closures
  47 * [ ] Some rvalue's
  48
  49 * [ ] Inline assembly
  50 * [ ] Custom sections