If you include a file in your source with the {$I filename} directive, the compiler will look for it in the following places:
You can add files to the include file search path with the -I (see page 108) or -Fi (see page 107) options.
As an example, consider the following include statement in a file units/foo.pp:
Then the following command :
will cause the compiler to look in the following directories for bar.inc: