... -lhbrtl -lhbsix -lhbsqlit3 -lhbtip -lhbusrrdd -lhbvm -lhbwin -lhbzlib -lrddcdx -lrddfpt -lrddntx -lxhb -lpng -Wl,--end-group then I get an error : unrecognized option --allow-multiple-definition . If let with comma : -ldflag=-Wl,--allow-multiple-definition , then return : can't find -ldflag=-Wl,--allow-multiple-definition ...