Some of GDC's command-line switches are just an eyesore to look at, and are not
very obvious or intuitive as to what they do.

To name the main culprits:

-fintfc
-fintfc-dir
-fintfc-file
-fXf
-fd-vtls
-fd-verbose
-fdoc
-fdoc-dir=
-fdoc-file=
-fdoc-inc=


These, and possibly a few others that either don't control the compilation or
don't have a negative form should instead be clear --long-options rather than
abbreviated -foptions.