Both headers are not required for the build and are excluded when
SF_BINARY is defined. The headers and defines can therefore be removed.
# file control checks
##################################################
-hdr filio
-sys filio
sys ioctl
lib remove
lib unlink
#if defined(_SFBINARY_H)
#undef _sys_stat
#undef _hdr_stat
-#undef _hdr_filio
-#undef _sys_filio
#undef _lib_poll
#undef _stream_peek
#undef _socket_peek
#include <fcntl.h>
-#ifndef F_SETFD
-#ifndef FIOCLEX
-#if _hdr_filio
-#include <filio.h>
-#else
-#if _sys_filio
-#include <sys/filio.h>
-#endif /*_sys_filio*/
-#endif /*_hdr_filio*/
-#endif /*_FIOCLEX*/
-#endif /*F_SETFD */
-
#if _hdr_unistd
#include <unistd.h>
#endif