I did not see any reason that corelow.c should include <sys/file.h>.
The provided explanatory comment seems to be wrong. This patch
removes the include.
2019-01-22 Tom Tromey <tom@tromey.com>
* corelow.c: Do not include sys/file.h.
2019-01-22 Tom Tromey <tom@tromey.com>
+ * corelow.c: Do not include sys/file.h.
+
+2019-01-22 Tom Tromey <tom@tromey.com>
+
* tui/tui-wingeneral.h: Include gdb_curses.h.
2019-01-22 Tom Tromey <tom@tromey.com>
#include "arch-utils.h"
#include <signal.h>
#include <fcntl.h>
-#ifdef HAVE_SYS_FILE_H
-#include <sys/file.h> /* needed for F_OK and friends */
-#endif
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "infrun.h"