/* Increase CC-RX warning level by using -message option
 * See JapanRenesasRulz post : https://japan.renesasrulz.com/cafe_rene/f/forum5/4421/thread/23330#23330
 */

/* /* nested comment */

int func(int, int, int, int);

volatile void sub1(int);
volatile int sub2(int);

volatile static int var = 1;;

/* See FIT BSP source files : r_bsp\board\XXXX\lowsrc.c, r_bsp\mcu\YYYY\mcu_interrupts.c
 * See also JapanRenesasRulz post : https://japan.renesasrulz.com/cafe_rene/f/forum5/4059/sci/20672#20672
 */
/* This macro is used to suppress compiler messages about a parameter not being used in a function. The nice thing
 * about using this implementation is that it does not take any extra RAM or ROM.
 */
#define INTERNAL_NOT_USED(p)        ((void)(p))

int func(int arg1, int arg2, int arg3, int arg4)
{
    unsigned char ch;

    arg1;
    INTERNAL_NOT_USED(arg2);
#if INTERNAL_NOT_USED
    INTERNAL_NOT_USED(arg3);
#endif  /* INTERNAL_NOT_USED */

    sub1(ch);
    ch = sub2(arg4);

    while (1) { volatile unsigned char ch; }
    while (1) {}

    return ch;
}