CC1312R: FATFS and long file name (issue at recompiling fatfs library)

Hello, i am trying to write files names longer that 8 characters using the FATFS library

In the forum I found the following post regarding this 

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/212914/fatfs-and-long-file-name

I tried to follow the instructions and i am not understanding how to recompile the library after setting up the changes (i don't understand how to add a .cfg file to the proyect and make it compile without errors).

Also I download the proyect in the last comment, but because its two years old now it does not work

Any help there?

Thank you all in advance

best regards

Andres