Very simple example core using the rust-libretro API abstractions.
This crate demonstrates how a minimal setup could look like.
Simply run cargo build or make debug to compile a debug build.
The produced shared library will follow the standard naming scheme of Rust, so Linux builds for example will be saved in ../target/debug/librust_libretro_example_core.so.
Release builds can be compiled with cargo build --release or make release. As usual, the produced library will reside in ../target/debug/.
The Makefile also provides a native target that instructs rustc to optimize the produced code for your host CPU only.
One easy way to test your compiled core is to use RetroArch’s CLI: retroarch -L <path to your built library>