samples/application_development/out_of_tree_board/src/main.c

/*
 * Copyright (c) 2012-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>

void main(void)
{
	printk("Hello World! %s\n", CONFIG_ARCH);
}