simplify emit_debug with gas magic

src/codegen_x86_64.rs

@@ -77,14 +77,12 @@ pub struct CodegenX86_64<'a> {
     data_counter: usize,
     pub symbol_table: &'a SymbolTable,
     pub expr_types: &'a HashMap<usize, String>,
-    emit_debug: bool,
 }
 
 impl<'a> CodegenX86_64<'a> {
     pub fn new(
         symbol_table: &'a SymbolTable,
         expr_types: &'a HashMap<usize, String>,
-        emit_debug: bool,
     ) -> CodegenX86_64<'a> {
         CodegenX86_64 {
             output: String::new(),
@@ -93,7 +91,6 @@ impl<'a> CodegenX86_64<'a> {
             data_counter: 1,
             symbol_table,
             expr_types,
-            emit_debug,
         }
     }
 
@@ -372,10 +369,10 @@ _builtin_environ:
                 exported,
             } => {
                 let name = &name.lexeme;
-                if self.emit_debug || *exported || name == "main" {
+                if *exported || name == "main" {
                     emit!(&mut self.output, ".globl {0}", name);
-                    emit!(&mut self.output, ".type {0}, @function", name);
                 }
+                emit!(&mut self.output, ".type {0}, @function", name);
                 emit!(&mut self.output, ".section .text.{}", name);
                 emit!(&mut self.output, "{}:", name);
                 emit!(&mut self.output, "    push rbp");

src/main.rs

@@ -38,8 +38,7 @@ fn compile_file(args: Args) -> Result<(), ZernError> {
         typechecker.typecheck_stmt(&mut typechecker::Env::new(), stmt)?;
     }
 
-    let mut codegen =
-        codegen_x86_64::CodegenX86_64::new(&symbol_table, &typechecker.expr_types, args.emit_debug);
+    let mut codegen = codegen_x86_64::CodegenX86_64::new(&symbol_table, &typechecker.expr_types);
     codegen.emit_prologue(args.use_crt)?;
     for stmt in statements {
         codegen.compile_stmt(&mut codegen_x86_64::Env::new(), &stmt)?;
@@ -50,7 +49,9 @@ fn compile_file(args: Args) -> Result<(), ZernError> {
 
         fs::write(format!("{out}.s"), codegen.get_output()).unwrap();
 
-        run_command(format!("as --64 -o {out}.o {out}.s"));
+        let debug_flag = if args.emit_debug { "-g" } else { "" };
+
+        run_command(format!("as --64 {debug_flag} -o {out}.o {out}.s"));
 
         if args.use_crt {
             run_command(format!(