diff --git a/compiler.ts b/compiler.ts
new file mode 100644
index 0000000..8cf72b0
--- /dev/null
+++ b/compiler.ts
@@ -0,0 +1,99 @@
+import child_process from "child_process"
+import { PlatformPath } from "path"
+import path from "path"
+
+const PREFIX = "/home/lyc/workspace/sw-autovec/swllvm-13.0.0-vect0919/local/installed/85e4fed0c9e4cd4ab8bce89f307127ccbad31294"
+const PREFIXBIN = path.join(PREFIX, "bin")
+const LLVM_EXTRACT = path.join(PREFIXBIN, "llvm-extract")
+
+const SYSROOT_PREFIX = "/usr/sw/standard-830-6b-test"
+
+const CXX = path.join(PREFIXBIN, "clang++")
+const CC = path.join(PREFIXBIN, "clang")
+const FC = path.join(PREFIXBIN, "flang")
+
+const SYSROOT_COMMAND = [
+    "--sysroot",
+    SYSROOT_PREFIX,
+]
+
+
+
+/**
+ * Helper function to generate output options for the linker.
+ * @param exe Executable file name.
+ * @returns Array of options to be passed to the linker.
+ */
+function driverOutput(exe: string): string[] {
+    return ["-o", exe];
+}
+
+
+export function functionList(module: string) {
+    let result: string[] = [];
+
+    // Split the LLVM module string by lines
+    const lines = module.split('\n')
+
+    lines.forEach(line => {
+        if (line.startsWith('define')) {
+            let begin = line.indexOf('@');
+            let end = line.indexOf('(');
+            result.push(line.substring(begin + 1, end).trim());
+        }
+    });
+    return result;
+}
+
+
+/**
+ * Extract one function using llvm-extract
+ */
+export async function extract(name: string, module: string, out: (a: string) => string) {
+    let process = child_process.spawn(
+        LLVM_EXTRACT, [
+        "--func",
+        name,
+        "-S",
+        "-o",
+        out(name),
+        module
+    ], { stdio: "inherit" }
+    )
+    const exitcode = await new Promise((resolve, reject) => { process.on('close', resolve) })
+    return exitcode
+}
+
+
+/**
+ * Links objects into an executable using specified environment variables and paths.
+ * @param objects Array of object files to link.
+ * @param exe Executable file name.
+ */
+export async function link(objects: string[], exe: string) {
+
+    // Set up environment variables
+    const linkenv = { ...process.env };
+    linkenv.LD_LIBRARY_PATH = [
+        path.join(PREFIX, 'lib'),
+        path.join(SYSROOT_PREFIX, 'lib'),
+        path.join(SYSROOT_PREFIX, 'usr', 'lib')
+    ].join(':');
+
+    // Construct link command
+    const linkcmd = [
+        FC,
+        ...objects,
+        "-L", path.join(PREFIX, 'lib'),
+        // TODO: Implement rpath logic here if needed
+        ...driverOutput(exe)
+    ];
+
+    // Execute the link command
+    child_process.spawn(linkcmd[0], linkcmd.slice(1), {
+        stdio: 'inherit',
+        env: linkenv
+    });
+
+    return new Promise((resolve, reject) => { process.on('close', resolve) })
+}