42 lines
1.3 KiB
Markdown
42 lines
1.3 KiB
Markdown
# WIP Cranelift codegen backend for rust
|
|
|
|
> ⚠⚠⚠ Threads and certain kinds of FFI don't work yet. ⚠⚠⚠
|
|
|
|
## Building
|
|
|
|
```bash
|
|
$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
|
|
$ cd rustc_codegen_cranelift
|
|
$ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
|
|
$ ./test.sh
|
|
```
|
|
|
|
## Usage
|
|
|
|
`$cg_clif_dir` is the directory you cloned this repo into in the following instruction.
|
|
|
|
### Cargo
|
|
|
|
```bash
|
|
$ $cg_clif_dir/cargo.sh run
|
|
```
|
|
|
|
### Rustc
|
|
|
|
```bash
|
|
$ rustc -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.so --sysroot $cg_clif_dir/build_sysroot/sysroot my_crate.rs
|
|
```
|
|
|
|
|
|
## Not yet supported
|
|
|
|
* Good non-rust abi support ([several problems](https://github.com/bjorn3/rustc_codegen_cranelift/issues/10))
|
|
* Checked binops ([some missing instructions in cranelift](https://github.com/CraneStation/cranelift/issues/460))
|
|
* Inline assembly ([no cranelift support](https://github.com/CraneStation/cranelift/issues/444), not coming soon)
|
|
* SIMD ([tracked here](https://github.com/bjorn3/rustc_codegen_cranelift/issues/171), some basic things work)
|
|
|
|
## Troubleshooting
|
|
|
|
### Can't compile
|
|
|
|
Try updating your nightly compiler. You can try to use an nightly a day or two older if updating rustc doesn't fix it. If you still can't compile it, please fill an issue.
|