----- RallyGame ( MAIN GCC DEBUG DEBUG_FULL BLITZ WIN32 ) Linking... (option '-O 2' ignored) ___main: duplicate -> used: libmingw32.a:gccmain.o:1 -> discarded: libgcc.a:__main.o:1 1 undefined symbol(s): __imp___ZN3irr12createDeviceENS_5video13E_DRIVER_TYPEERKNS_4core11dimension2dIiEEjbbbPNS_14IEventReceiverEPKc (referenced from c:\upp\out\ rallygame\mingw.debug_full.main\helloworld.o:1; _main; __static_initialization_and_destruction_0(int, int); __static_initialization_an d_destruction_0(int, int); ...) linking aborted due to fatal errors collect2: ld returned 1 exit status There were errors. (0:02.38)