What is the Nim type of a C varargs list. Is it compatable with a Nim varargs. How would you foreward a Nim varargs to a C varargs.
proc printf(format: cstring): cint {.varargs, importc, header: "<stdio.h>", cdecl.}
proc printf2(format: cstring, v: varargs[any]): cint
printf(format, v???)