add: compiler

rpgrt/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name    = "rpgrt"
+version = "0.1.0"
+edition = "2021"
+
+# ─────────────────────────────────────────────────────────────────────────────
+# Build as a C-compatible shared library (librpgrt.so) so that RPG IV programs
+# compiled by rust-langrpg can link against it at runtime.
+# ─────────────────────────────────────────────────────────────────────────────
+
+[lib]
+name       = "rpgrt"
+path       = "src/lib.rs"
+crate-type = ["cdylib", "rlib"]
+
+# cdylib  → produces librpgrt.so  (loaded by compiled RPG binaries)
+# rlib    → allows `cargo test` to run the unit tests in src/lib.rs
+
+[dependencies]
+# No external dependencies — the runtime is intentionally minimal and relies
+# only on the Rust standard library and libc (linked automatically).