Add upstream

wp-content/plugins/jetpack/vendor/automattic/jetpack-compat/functions.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * Legacy global scope functions.
+ *
+ * @package global-functions
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	return;
+}
+
+// Add here, after the condition above, any code that should only run when WordPress is running.
+// Autoload will load everything even when PHPCS is running and we don't want to run these
+// in such case because they will fatal, for example, due to 'add_action' being undefined.
+
+/**
+ * Load necessary functions.
+ */
+function jetpack_compat_require_defined_functions() {
+	jetpack_require_lib( 'tracks/client' );
+}
+
+add_action( 'plugins_loaded', 'jetpack_compat_require_defined_functions' );
+
+