Dependencies

Rust, make sure you install the nightly:

$ curl -s https://static.rust-lang.org/rustup.sh | sudo sh -s -- --channel=nightly

PHP, 5.6.7, make sure you build it with --debug-enabled

Building the Rust part

$ cargo build
$ cp target/debug/librust_a_star-HEXSIGNATURE.dylib PATH/TO/YOUR/PHP/EXTENSIONS/librust_a_star.dylib

$ PATH/TO/YOUR/DEBUG/ENABLED/PHP/php src/rust_a_star.php