Add missing build.rs

Author: tekjar

build.rs

@@ -0,0 +1,34 @@
+use std::path::PathBuf;
+
+fn main() {
+    // Tell cargo to look for shared libraries in the specified directory
+    println!("cargo:rustc-link-search=./");
+
+    // Tell cargo to tell rustc to link the system bzip2
+    // shared library.
+    println!("cargo:rustc-link-lib=chdb");
+
+    // Tell cargo to invalidate the built crate whenever the wrapper changes
+    println!("cargo:rerun-if-changed=chdb.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("chdb.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("./src/");
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}