...

example/makefile

@@ -1,9 +1,12 @@
-CFLAGS = -Wall -Werror -Wextra -g
+CFLAGS = -g
 
-example:
+bin/out: src/main.nub src/c.nub
 	dotnet run --project ../src/compiler/CLI/CLI.csproj src/main.nub src/c.nub
 	mkdir -p bin
-	gcc $(CFLAGS) -o bin/out lib/libruntime_x64.a bin-int/out.a
+	gcc $(CFLAGS) -o bin/out bin-int/out/out.a
+
+run: bin/out
+	bin/out
 
 clean:
 	rm -r bin-int bin

example/src/main.nub

@@ -3,4 +3,5 @@ namespace main
 export func main(args: []cstring): i64 {
     c::puts("test")
     return 0
+    
 }

src/compiler/CLI/CLI.csproj

@@ -18,4 +18,9 @@
       <None Remove="runtime\libruntime_x64.a" />
     </ItemGroup>
 
+    <ItemGroup>
+      <None Remove="assets\libruntime_x64.a" />
+      <EmbeddedResource Include="assets\libruntime_x64.a" />
+    </ItemGroup>
+
 </Project>

src/compiler/CLI/HexString.cs

@@ -0,0 +1,38 @@
+namespace CLI;
+
+internal static class HexString
+{
+    private static readonly HashSet<string> _used = [];
+
+    private static readonly char[] StringChars = "0123456789abcdef".ToArray();
+
+    public static string CreateUnique(int length)
+    {
+        string hex;
+
+        while (true)
+        {
+            hex = Create(length);
+            if (_used.Add(hex))
+            {
+                break;
+            }
+        }
+
+        return hex;
+    }
+
+    public static string Create(int length)
+    {
+        var rand = new Random();
+        var hexString = "";
+
+        for (var i = 0; i < length; i++)
+        {
+            var randIndex = rand.Next(0, StringChars.Length);
+            hexString += StringChars[randIndex];
+        }
+
+        return hexString;
+    }
+}

src/compiler/CLI/Options.cs

@@ -0,0 +1,6 @@
+namespace CLI;
+
+public class Options
+{
+    public string? CustomRuntime { get; set; }
+}

src/compiler/CLI/Program.cs

@@ -1,20 +1,49 @@
-using CLI;
+using System.Reflection;
+using CLI;
 using Generation.QBE;
 using Syntax;
 using Syntax.Diagnostics;
 using Syntax.Parsing;
 using Syntax.Tokenization;
 using Syntax.Typing;
+using Binder = Syntax.Typing.Binder;
 
-const string OUT_DIR = "bin-int";
+const string INT_DIR = "bin-int";
+var BUILTIN_DIR = Path.Join(INT_DIR, "builtin");
+var OBJECT_DIR = Path.Join(INT_DIR, "obj");
+var OUT_DIR = Path.Join(INT_DIR, "out");
 
+if (Directory.Exists(INT_DIR))
+{
+    Directory.Delete(INT_DIR, true);
+}
+
+Directory.CreateDirectory(BUILTIN_DIR);
+Directory.CreateDirectory(OBJECT_DIR);
 Directory.CreateDirectory(OUT_DIR);
 
+var options = new Options();
+
 var files = new List<string>();
 
-foreach (var arg in args)
+for (var i = 0; i < args.Length; i++)
 {
+    var arg = args[i];
+    if (arg.StartsWith("-r") || arg.StartsWith("--runtime"))
+    {
+        i++;
+        if (i >= args.Length - 1)
+        {
+            Console.Error.WriteLine($"{arg} must be followed by a value");
+            return 1;
+        }
+
+        options.CustomRuntime = args[i];
+    }
+    else
+    {
         files.Add(arg);
+    }
 }
 
 var diagnostics = new List<Diagnostic>();
@@ -80,7 +109,7 @@ foreach (var file in files)
         return 1;
     }
 
-    var fileName = Path.GetTempFileName();
+    var fileName = Path.Join(OBJECT_DIR, $"{HexString.CreateUnique(8)}_{Path.GetFileNameWithoutExtension(file)}.o");
     var asmSuccess = await GCC.Assemble(asm, fileName);
     if (!asmSuccess)
     {
@@ -90,6 +119,29 @@ foreach (var file in files)
     objectFiles.Add(fileName);
 }
 
+if (options.CustomRuntime == null)
+{
+    try
+    {
+        objectFiles.Add(await CreateBuiltinRuntime());
+    }
+    catch (RuntimeCreationException e)
+    {
+        Console.Error.WriteLine(e.Message);
+        return 1;
+    }
+}
+else
+{
+    if (!File.Exists(options.CustomRuntime))
+    {
+        Console.Error.WriteLine($"file '{options.CustomRuntime}' does not exist'");
+        return 1;
+    }
+    
+    objectFiles.Add(options.CustomRuntime);
+}
+
 var archiveResult = await Archive.Invoke(Path.Join(OUT_DIR, "out.a"), objectFiles);
 if (!archiveResult)
 {
@@ -97,3 +149,27 @@ if (!archiveResult)
 }
 
 return 0;
+
+async Task<string> CreateBuiltinRuntime()
+{
+    const string RUNTIME_NAME = "libruntime_x64.a";
+
+    var resources = Assembly.GetExecutingAssembly().GetManifestResourceNames();
+    var runtime = resources.First(r => r.EndsWith(RUNTIME_NAME));
+
+    await using var reader = Assembly.GetExecutingAssembly().GetManifestResourceStream(runtime);
+    
+    if (reader == null)
+    {
+        throw new RuntimeCreationException($"Cannot open stream to '{RUNTIME_NAME}'");
+    }
+
+    var runtimePath = Path.Combine(BUILTIN_DIR, RUNTIME_NAME);
+    await using var writer = new FileStream(runtimePath, FileMode.Create);
+
+    reader.CopyTo(writer);
+        
+    return runtimePath;
+}
+
+class RuntimeCreationException(string message) : Exception(message);