feat: added static linking against libnl

libnl will be used to help understand kernel routing tables

nl-sys/Cargo.toml

@@ -6,4 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-libc = "0.2.142"
+libc = "0.2.142"
+
+[build-dependencies]
+autotools = "0.2"

nl-sys/build.rs

@@ -0,0 +1,24 @@
+// Copyright (C) 2023 Andrew Rioux
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+// 
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+fn main() {
+    let dst = autotools::Config::new("libnl")
+        .reconf("-vi")
+        .build();
+
+    println!("cargo:rustc-link-search=native={}/lib", dst.display());
+    println!("cargo:rustc-link-lib=static=nl-3");
+    println!("cargo:rustc-link-lib=static=nl-route-3");
+}

nl-sys/src/lib.rs

@@ -1,14 +0,0 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}

nl-sys/src/main.rs

@@ -0,0 +1,24 @@
+// Copyright (C) 2023 Andrew Rioux
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+// 
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+enum nl_sock {}
+
+extern {
+    fn nl_socket_alloc() -> nl_sock;
+}
+
+fn main() {
+    unsafe { nl_socket_alloc(); }
+}