prototypes required ?

[Doug Gwyn]

In article <483 at taumet.com> steve at taumet.com (Stephen Clamage) writes:
>!	int vfprintf (FILE *, const char *, void *);
>!Obviously, that last formal parameter type is not correct!
>Yes, they cheated, and this is not standard-conforming.  The prototype
>must match the one in the standard.

Presumably the declaration was correct for the implementation being
used as a basis for modification by the original poster.  I.e., I bet
that void* was the type of va_list in that implementation.  The
spellings of the prototypes given in the standard need not be used in
a conforming implementation; however, the types of the specified
library functions, objects, etc. must be compatible with the ones in
the standard.

>Then in <stdio.h> we would have:
>	struct _T;
>	int vfprintf(FILE *, const char*, struct _T*);	
>This meets all of the ANSI requirements.

I don't think so.  You've given a parameter an incomplete type.