Ever wanted to build “native” assemblyish stuff in your cargo build scripts… something gcc crate cannot quite handle yet? Welcome to llvmbuildutils which provides a convenient API to pack your LLVM-IR or LLVM bytecode files into a ready to use archive full of machine code! It doesn’t even need LLVM installation and works on stable Rust¹!
No MSVC windows support yet, though
¹: May break between versions or be incompatible with some versions of Rust, though. We’ll try to document such breakages in the table below.
| Rustc version | This Library | | ------------- | ------------- | | 1.8-1.11 | 0.1-0.2 |
First, you’ll want to both add a build script for your crate (build.rs
) and also add this crate
to your Cargo.toml
via:
```toml [package]
build = "build.rs"
[build-dependencies] llvmbuildutils = "0.3" ```
Then write your build.rs
like this:
```rust extern crate llvmbuildutils; use llvmbuildutils::*;
fn main() { build_archive("libyourthing.a", &[ ("input.ll", BuildOptions { ..BuildOptions::default() // customise how the file is built }) ]).expect("error happened").print(); } ```
Running a cargo build
should produce libyourthing.a
which then may be linked to your Rust
executable/library.
llvmbuildutils is distributed under ISC (MIT-like) or Apache (version 2.0) license at your choice.