Pass va_list or pointer to va_list?

Question

Suppose I have a function which takes variadic arguments (...) or a va_list passed from another such function. The main logic is in this function i

Answer 1

In my understanding, you're supposed to pass the va_list directly (not a pointer to it). This seems to be supported by comp.lang.c:

"A va_list is not itself a variable argument list; it's really sort of a pointer to one. That is, a function which accepts a va_list is not itself varargs, nor vice versa. "