Hi,
it seems that the file 'DeviceDriver.c' is not part of your project...
Are you using the provided makefile within the subdirectory /Examples/DeviceIntegration or are you working with the /Examples/Template project?
I just verified once again the sample /Examples/DeviceDriver for STM32F469 and it works as expected.
In case you have further problems, please post the exact error message and/or a screenshot.
Best regards,
Manfred