* Makefile.in (SFILES): Add ser-base.c.

	* Makefile.in (SFILES): Add ser-base.c.
	(ser_base_h): New variable.
	(ser-base.o): New target.
	(ser-pipe.o): Depend on $(ser_base_h).
	(ser-tcp.o): Likewise.
	(ser-unix.o): Likewise.  Do not depend on $(event_loop_h).
	* configure.ac (SER_HARDWIRE): Include ser-base.o where
	appropriate.
	* ser-base.c: New file.
	(push_event): Move from ser-unix.c.
	(fd_event): Likewise.
	(reschedule): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_nop_flush_output): Likewise.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_async): Likewise.
	* ser-base.h: New file.
	* ser-pipe.c (ser-base.h): Include it.
	* ser-tcp.c (ser-base.h): Likewise.
	* ser-unix.h (ser_unix_nop_flush_output): Remove.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_wait_for): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_async): Likewise.
	* ser-unix.c (event-loop.h): Do not include it.
	(push_event): Move to ser-base.c.
	(fd_event): Likewise.
	(reschedule): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_nop_flush_output): Likewise.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_async): Likewise.
	(ser_unix_wait_for): Make it static.
	* configure: Regenerated.