RS485 Wind Direction

When installing the wind direction package on my raspberry pi 4, I keep getting stuck at this step: sudo gcc -Wall -o Wind_Direction *.c -lwiringPi 

Is this an issue with the file or with my settings? I've tried to fix according to this https://www.dfrobot.com/forum/topic/320004 which gets me one step further and then I'm stuck at sudo ./Wind_Direction with error message “Segmentation fault”. 

Any help would be greatly appreciated