add more crates

Signed-off-by: xermicus <cyrill@parity.io>

crates/lld-sys/build.rs

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0
+
+use std::{io::Read, process::Command};
+
+fn main() {
+    let mut flags = String::new();
+    Command::new("llvm-config")
+        .args(["--cxxflags"])
+        .output()
+        .expect("llvm-config should be able to provide CXX flags")
+        .stdout
+        .as_slice()
+        .read_to_string(&mut flags)
+        .expect("llvm-config output should be utf8");
+
+    let mut builder = cc::Build::new();
+    flags
+        .split_whitespace()
+        .fold(&mut builder, |builder, flag| builder.flag(flag))
+        .cpp(true)
+        .file("src/linker.cpp")
+        .compile("liblinker.a");
+
+    println!("cargo:rerun-if-changed=build.rs");
+}