void foo( int (*f)() )
    {
        f(1);
        f(1, "2" , 3.0);
    }

If you compile with -std=c23, both gcc and clang will throw an error ( (*f)() is now the same as (*f)(void) )

You can write a function declaration that's inconsistent with its definition in another translation unit. Declaring the function in a shared header file avoids this.

You can use an old-style declaration that doesn't specify what parameters a function expects. Don't do that. Use prototypes.

You can use a cast to convert a function pointer to an incompatible type, and call through the resulting pointer. Don't do that.

You can call a function with no visible declaration if your compiler overly permissive or is operating in pre-C99 mode. Don't do that.

Itanium? Stone age