Will a void* always have the same representation as a char*?

Question

Will a void* always have the same representation as a char* ?

Details:

I want to work with a variadic function tha

Answer 1

It's specifically allowed to access a void* argument using va_arg(args, char*) and vice versa, not just for the null pointer.

See also http://en.cppreference.com/w/cpp/utility/variadic/va_arg

Answer 2

C11, §6.2.5, ¶28 (draft N1570) says:

A pointer to void shall have the same representation and alignment requirements as a pointer to a character type. 48) Similarly, pointers to qualified or unqualified versions of compatible types shall have the same representation and alignment requirements.

(emphasis mine).