Someone

gcc main.o SDL.o capture.o -o main -m32 -lSDL -Xlinker -L/usr/lib -lphobos -lpthread -lm
main.o: In function `_Dmain':
main.d:(.gnu.linkonce.t_Dmain+0x9): undefined reference to `open_device'
collect2: ld returned 1 exit status
--- errorlevel 1