2.5 '.include' Search Path: '-I' PATH ===================================== Use this option to add a PATH to the list of directories 'as' searches for files specified in '.include' directives ((as))). 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, 'as' searches any '-I' directories in the same order as they were specified (left to right) on the command line.