E:\Download\Open2300\open2300-1.10>C:\MinGW\bin\gcc.exe -c aprs2300.c

E:\Download\Open2300\open2300-1.10>C:\MinGW\bin\gcc.exe -o aprs2300 aprs2300.o
aprs2300.o(.text+0x93):aprs2300.c: undefined reference to `get_configuration'
aprs2300.o(.text+0xa1):aprs2300.c: undefined reference to `open_weatherstation'
aprs2300.o(.text+0xb7):aprs2300.c: undefined reference to `print_usage'
aprs2300.o(.text+0x160):aprs2300.c: undefined reference to `wind_all'
aprs2300.o(.text+0x199):aprs2300.c: undefined reference to `windchill'
aprs2300.o(.text+0x1d2):aprs2300.c: undefined reference to `temperature_outdoor'

aprs2300.o(.text+0x20b):aprs2300.c: undefined reference to `rain_1h'
aprs2300.o(.text+0x244):aprs2300.c: undefined reference to `rain_24h'
aprs2300.o(.text+0x27d):aprs2300.c: undefined reference to `rain_total'
aprs2300.o(.text+0x2b6):aprs2300.c: undefined reference to `rel_pressure'
aprs2300.o(.text+0x2e5):aprs2300.c: undefined reference to `humidity_outdoor'
aprs2300.o(.text+0x331):aprs2300.c: undefined reference to `close_weatherstation
'
collect2: ld returned 1 exit status
aprs2300.o(.text+0x93):aprs2300.c: undefined reference to `get_configuration'
aprs2300.o(.text+0xa1):aprs2300.c: undefined reference to `open_weatherstation'
aprs2300.o(.text+0xb7):aprs2300.c: undefined reference to `print_usage'
aprs2300.o(.text+0x160):aprs2300.c: undefined reference to `wind_all'
aprs2300.o(.text+0x199):aprs2300.c: undefined reference to `windchill'
aprs2300.o(.text+0x1d2):aprs2300.c: undefined reference to `temperature_outdoor'