Since it's unused, make dirfd() take void *.

Some platforms (eg Old BSDs) in some configurations define DIR to "void
*", which causes compile errors in the no-op implementation.

Author: daztucker

openbsd-compat/bsd-misc.c

@@ -160,7 +160,7 @@ utimensat(int fd, const char *path, const struct timespec times[2],
 
 #ifndef HAVE_DIRFD
 int
-dirfd(DIR *dir)
+dirfd(void *dir)
 {
 	errno = ENOSYS;
 	return -1;

openbsd-compat/bsd-misc.h

@@ -66,9 +66,7 @@ int utimes(const char *, struct timeval *);
 #endif /* HAVE_UTIMES */
 
 #ifndef HAVE_DIRFD
-#include <sys/types.h>
-#include <dirent.h>
-int dirfd(DIR *);
+int dirfd(void *);
 #endif
 
 #ifndef AT_FDCWD