Hi everyone:

I'm Weiwen Chen from Fudan University and I'm working on adding `robocopy.exe` into wine. I stage my work on my github fork.

This program accepts complex command line arguments, so I'm trying to implement my own `getopt` function which accepts dos-style flags(beginning with slash, like `/x`).

The dummy code is under programs/robocopy directory. And I want to add some unittest of `getopt_long()`, in robocopy/tests/getopt.c. I try to import my source code of `getopt.c` relatively into unit test file, but I failed with error message like this: