From 609c8c2afe979fc0d29f9418fd95050fa39e4f57 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Sun, 17 Jul 2022 11:31:30 +0300
Subject: Add basic bindgen skeleton

---
 Cargo.toml |  4 +---
 build.rs   | 37 +++++++++++++++++++++++++++++++++++++
 src/lib.rs |  4 ++++
 wrapper.h  |  1 +
 4 files changed, 43 insertions(+), 3 deletions(-)
 create mode 100644 build.rs
 create mode 100644 wrapper.h

diff --git a/Cargo.toml b/Cargo.toml
index f4192a7..8068b17 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,5 @@ name = "codec2-sys"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
+[build-dependencies]
 bindgen = "0.60.1"
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..abe2eb4
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,37 @@
+extern crate bindgen;
+
+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    // Tell cargo to look for shared libraries in the specified directory
+    println!("cargo:rustc-link-search=/usr/lib");
+
+    // Tell cargo to tell rustc to link the system bzip2
+    // shared library.
+    println!("cargo:rustc-link-lib=codec2");
+
+    // Tell cargo to invalidate the built crate whenever the wrapper changes
+    println!("cargo:rerun-if-changed=wrapper.h");
+
+    // The bindgen::Builder is the main entry point
+    // to bindgen, and lets you build up options for
+    // the resulting bindings.
+    let bindings = bindgen::Builder::default()
+        // The input header we would like to generate
+        // bindings for.
+        .header("wrapper.h")
+        // Tell cargo to invalidate the built crate whenever any of the
+        // included header files changed.
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
+        // Finish the builder and generate the bindings.
+        .generate()
+        // Unwrap the Result and panic on failure.
+        .expect("Unable to generate bindings");
+
+    // Write the bindings to the $OUT_DIR/bindings.rs file.
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}
diff --git a/src/lib.rs b/src/lib.rs
index 1b4a90c..9bc6753 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,9 @@
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+    
     #[test]
     fn it_works() {
         let result = 2 + 2;
diff --git a/wrapper.h b/wrapper.h
new file mode 100644
index 0000000..ae333d5
--- /dev/null
+++ b/wrapper.h
@@ -0,0 +1 @@
+#include <codec2/codec2.h>
-- 
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