rustlibd: rust daemon templatedev/rust-skel

Signed-off-by: Christian Hopps <chopps@labn.net>

1 files changed, 94 insertions, 0 deletions

diff --git a/rustlibd/build.rs.in b/rustlibd/build.rs.in
new file mode 100644
index 0000000000..9d5741e461
--- /dev/null
+++ b/rustlibd/build.rs.in
@@ -0,0 +1,94 @@
+extern crate bindgen;
+// extern crate gcc;
+
+use std::env;
+use std::path::PathBuf;
+
+use bindgen::callbacks::{MacroParsingBehavior, ParseCallbacks};
+use std::sync::{Arc, RwLock};
+
+use std::collections::HashSet;
+
+//
+// This complexity is need to ignore a #define in netdb.h that is shadowing an
+// anonymous enum in netinet/in.h
+//
+#[derive(Debug)]
+struct MacroCallback {
+    macros: Arc<RwLock<HashSet<String>>>,
+}
+
+impl ParseCallbacks for MacroCallback {
+    fn will_parse_macro(&self, name: &str) -> MacroParsingBehavior {
+        self.macros.write().unwrap().insert(name.into());
+
+        if name == "IPPORT_RESERVED" {
+            return MacroParsingBehavior::Ignore;
+        }
+
+        MacroParsingBehavior::Default
+    }
+}
+
+fn main() {
+    // // Tell cargo to look for shared libraries in the specified directory
+    // println!("cargo:rustc-link-search=@abs_top_builddir@/lib/.libs/libfrr.so");
+    // // Tell cargo to tell rustc to link libfrr shared library.
+    // println!("cargo:rustc-link-lib=frr");
+
+    // Tell cargo to invalidate the built crate whenever the wrapper changes
+    // println!("cargo:rerun-if-changed=@abs_srcdir@/wrapper.h");
+    println!("cargo:rerun-if-changed=wrapper.h");
+
+    let macros = Arc::new(RwLock::new(HashSet::new()));
+
+    // 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()
+        .clang_args(&[
+            "-I@abs_top_builddir@", // need to get this dynamically
+            "-I@abs_top_srcdir@",
+            "-I@abs_top_srcdir@/lib",
+            "-DHAVE_CONFIG_H",
+            "-D_ATOMIC_WANT_TYPEDEFS",
+        ])
+        // The input header we would like to generate
+        // bindings for.
+        // .header("@abs_srcdir@/wrapper.h")
+        .header("wrapper.h")
+        // Tell cargo to invalidate the built crate whenever any of the
+        // included header files changed.
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
+        .parse_callbacks(Box::new(MacroCallback {
+            macros: macros.clone(),
+        }))
+        // Finish the builder and generate the bindings.
+        .blocklist_type("IPPORT_.*")
+        .blocklist_type("IPPORT_RESERVED")
+        // avoid creating bindings for things with u128 which doesn't yet have a
+        // stable FFI, for now.
+
+        .blocklist_function("lyd_eval_xpath4")
+        .blocklist_function("q[efg]cvt.*")
+        .blocklist_function("strto.*")
+        .blocklist_function("strfrom.*")
+
+        .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!");
+
+    // cc::Build::new()
+    //     .include("@abs_top_builddir@")
+    //     .include("@abs_top_srcdir@")
+    //     .include("@abs_top_srcdir@/lib")
+    //     .define("HAVE_CONFIG_H", None)
+    //     .file("@abs_srcdir@/rustlib_main.c")
+    //     .compile("c_main_code");
+}