Synopsis

Arguments are passed to functions without a valid prototype.

Enabled by default

Yes

Severity/Certainty

Low/Low

Full description

Arguments are passed to functions without a valid prototype. This is permitted in C89, but it is unsafe because it bypasses all type checking.

Coding standards

Code examples

The following code example fails the check and will give a warning:

void func();	/* not a valid prototype in C */
void func2(void)
{
    func(77);
    func(77.0);
}

The following code example passes the check and will not give a warning about this issue:

void func(void);
void func2(void)
{
    func();
}