first bits of a dynamc lib

lib/build.rs

@@ -0,0 +1,18 @@
+use cbindgen::*;
+
+use std::env;
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+
+    Builder::new()
+        .with_crate(crate_dir)
+        .with_language(Language::C)
+        .with_config(Config {
+            cpp_compat: true,
+            ..Default::default()
+        })
+        .generate()
+        .expect("Unable to generate bindings")
+        .write_to_file("taskchampion.h");
+}