Rust as a C Library: Headers, `#[repr(C)]`, Versioned Symbols, and ABI Tests

A practical two-hour session on Rust as a C Library, focused on Headers, #[repr(C)], Versioned Symbols, and ABI Tests. The session treats Rust as a native component exposed through C-compatible boundaries, with attention to packaging, ownership, host-runtime tests, and failure handling.

Audience: entry-level and intermediate developers who want a practical engineering session, not a language tour.

Outcomes:

• Explain the practical boundaries of Rust as a C Library
• Apply Headers in a small working example
• Apply #[repr(C)] in a small working example
• Apply Versioned Symbols in a small working example

Format: two hours with a short framing walkthrough, a concrete example, discussion of tradeoffs, and a closing checklist for practice.