do not declare sprintf. On some systems it is an int, on others it is

a char *

mach/proto/ncg/gencode.c

@@ -19,12 +19,6 @@ static char rcsid[] = "$Header$";
  * Author: Hans van Staveren
  */
 
-#ifndef __STDC__
-extern char *sprintf();
-#else
-/* sprintf should be declared in stdio.h, as returning an int */
-#endif
-
 string mystrcpy();
 
 FILE *codefile;