If the Extended Error Checking option is on, the C compiler generates a warning (not an error) if it encounters one of these syntax problems:

• A non-void function that does not contain a return statement. For example, this would generate a warning:

---

main()              /* assumed to return int */
{
  printf ("hello world\n");
} /* WARNING: no return statement */

---

void main() /* function declared to return void */
{
    printf ("hello world\n");
}

enum Day { Sunday, Monday, Tuesday, Wednesday, 
                      Thursday, Friday, Saturday } d;

d = 5;                        /* WARNING */
d = Monday;              /* OK */
d = (Day)3    ;          /* OK */

int MyInit(void)
{
    int err = GetMyResources();
  if (err !=0) return;  /* ERROR: Empty return statement */

  /* ... */

This would be OK:

int MyInit(void)
{
    int err = GetMyResources();
    if (err!=0) return -1; /* OK */

  /* ... */

The Extended Error Checking option corresponds to the pragma extended_errorcheck, described at "extended_errorcheck." To check whether this option is on, use __option (extended_errorcheck). See "Checking Options" for information on how to use this directive.