When nmea is False and ncurses support is enabled, the build fails as follows. gpsmon.o: In function `gpsmon_hook': gpsmon.c:(.text+0x974): undefined reference to `driver_nmea0183' collect2: error: ld returned 1 exit status scons: *** [gpsmon] Error 1 scons: building terminated because of errors. The problem appears to be a failure to protect use of the driver_nmea0183 variable with appropriate #ifdef guards. Signed-off-by: Simon Dawson --- gpsmon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gpsmon.c b/gpsmon.c index 106e080..c965a3f 100644 --- a/gpsmon.c +++ b/gpsmon.c @@ -36,7 +36,9 @@ extern struct monitor_object_t garmin_mmt, garmin_bin_ser_mmt; extern struct monitor_object_t italk_mmt, ubx_mmt, superstar2_mmt; extern struct monitor_object_t fv18_mmt, gpsclock_mmt, mtk3301_mmt; extern struct monitor_object_t oncore_mmt, tnt_mmt, aivdm_mmt; +#ifdef NMEA_ENABLE extern const struct gps_type_t driver_nmea0183; +#endif /* NMEA_ENABLE */ /* These are public */ struct gps_device_t session; @@ -477,9 +479,11 @@ static void select_packet_monitor(struct gps_device_t *device) */ if (device->packet.type != last_type) { const struct gps_type_t *active_type = device->device_type; +#ifdef NMEA_ENABLE if (device->packet.type == NMEA_PACKET && ((device->device_type->flags & DRIVER_STICKY) != 0)) active_type = &driver_nmea0183; +#endif /* NMEA_ENABLE */ if (!switch_type(active_type)) longjmp(terminate, TERM_DRIVER_SWITCH); else { -- 1.8.3.2