+#ifdef HAVE_SYS_UN_H
+# include <sys/un.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif