-I
Use this option to add a path to the list of directories as searches for files specified in .include directives (see .include). You may use -I as many times as necessary to include a variety of paths. The current working directory is always searched first; after that directories are searched in the same order they are specified (left to right) on the command line.
-v
Announce version.
Debugging(Wa,-g)
Use this option to enable the debug level.