Trying to add a menu to my toolbar, however the code supposedly required to do that is showing errors:

Here's my other code:

res/menu/home_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/settings"
        android:title="@string/settings" />
    <item
        android:id="@+id/dark_theme"
        android:title="@string/dark_theme" />

</menu>

Here's the layout with the Toolbar I want to add the menu to:

res/layout/activity_home.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorVeryDark"
        android:elevation="4dp"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar" />

</LinearLayout>

Any idea how I can add my menu to the toolbar?