gpsctl: invalid option -- '-' usage: gpsctl [-l] [-b | -n | -r] [-D n] [-s speed] [-c rate] [-T timeout] [-V] [-t devtype] [-x control] [-R] [-e] [device] gpsctl: version 3.16 (revision 3.16-4)

gpsctl: invalid option -- '-' usage: gpsctl [-l] [-b | -n | -r] [-D n] [-s speed] [-c rate] [-T timeout] [-V] [-t devtype] [-x control] [-R] [-e] [device] usage: gpsctl [-l] [-b | -n | -r] [-D n] [-s speed] [-c rate] [-T timeout] [-V] [-t devtype] [-x control] [-R] [-e] [device] Unknown -x NMEA0183 -x Ashtech -x Delorme TripMate -x Pre-2003 Delorme EarthMate -x Furuno Electric GH-79L4 -[bn] -x Garmin NMEA -c -x MTK-3301 -x OceanServer OS5000 -x San Jose Navigation FV18 -s -x True North -c -x Jackson Labs Fury AIVDM -[bn] -s -c -x EverMore -[bn] -x Garmin Serial binary -x Garmin USB binary -[bn] -s -x GeoStar iTalk -x Motorola Oncore -s -x Navcom NCT -[bn] -s -x SiRF -[bn] -s -x SuperStarII -[bn] -s -x Trimble TSIP -[bn] -s -c -x u-blox -s -x Zodiac NMEA2000 RTCM104V2 RTCM104V3 Garmin Simple Text JSON slave driver PPS