How to remove "Undfined Symbol" error??

I'm getting this error I tried to solve but I'm not able to do so. Here I'm attaching the screenshot below please help me. I have added all the header files also in the main

  • Hi actually i was also facing the same issue. In my case what happened is iI kept the driver source files and inlcude files in the other folder thats why  linker was not able to link them. Then i cpoied every single file into the project filder and also i gave path of that folder by going into the option folder and then c/c++ and then include path option.