🚀 go-pugleaf

How about this?
--
/*
 * my_varargs.h
 */
#ifndef MY_VARARGS_H
#define MY_VARARGS_H

#ifdef	__STDC__

#define		EXTERN_VARARGS(type, f, args)	extern	type	f args
#define		VARARGS(type, f, args)		type	f args
#define		VA_START(ap, type, start)	va_start(ap, start)
#include	<stdarg.h>

#else	/* __STDC__ */

#define		EXTERN_VARARGS(type, f, args)	extern	type	f()
#define		VARARGS(type, f, args)		type	f(va_alist) \
						va_dcl
#define		VA_START(ap, type, start)	va_start(ap); \
						start = va_arg(ap, type)
#include	<varargs.h>

#endif	/* __STDC__ */

#endif	/* !MY_VARARGS_H */
--
In somefile.h:
--
EXTERN_VARARGS(void, error, (error_p_type error, ...));
--
In somefile.c:
--
/* VARARGS1 */
VARARGS(void, error, (error_p_type error_p, ...))
{
#ifndef __STDC__
	error_p_type	error_p;
#endif	/* !__STDC__ */

	va_list ap;

	VA_START(ap, error_p_type, error_p);
	vfprintf(stderr, error_p->message, ap);
	va_end(ap);
	exit(error_p->status);
}
-- 
[...] like a roving gang.  "Ah, here's a NEW almost-empty group to post train
schedules and core dumps in!"  (Joe Buck) | maart@cs.vu.nl, mcsun!botter!maart