mir2wasm
This project is not under development and does nothing useful. If you just
want to compile Rust to WASM then the mainline Rust compiler can do that for
you. Read https://rustwasm.github.io/book/
An experimental compiler from Rust to WebAssembly, based on rustc + Rust MIR.
This doesn't do anything useful yet.
Hacking notes
I recommend that you install rustup and then use it to
install the current rustc nightly version:
Tested with nightly-2017-03-03
git clone https://github.com/brson/mir2wasm.git
cd mir2wasm
rustup override set nightly-2017-03-03
cargo build
cargo run -q -- rust-examples/nocore-hello-world.rs
Do println debugging with debug! so it goes to stderr and print it like:
RUST_LOG=mir2wasm cargo run -q -- rust-examples/nocore-hello-world.rs
rustc -Z unstable-options --unpretty=mir rust-examples/nocore-hello-world.rs
Plug this stuff into a wast file to print something:
(import $print_i32 "spectest" "print" (param i32))
(export "foo" $foo)
...
(call_import $print_i32 (get_local $1))
Resources
- miri the MIR interpreter. mir2wasm is derived
from it but shares no actual code. It probably should share code though, and
there's lots to learn from miri. - rustc_trans::mir.
- roadmap discussion.
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or
http://www.apache.org/licenses/LICENSE-2.0) - MIT license (LICENSE-MIT or
http://opensource.org/licenses/MIT) at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you shall be dual licensed as above, without any
additional terms or conditions.