Include Directory Paths
The Include Directory paths are used by the C compiler to find files referenced through #include directives. This is the preferred method of referencing include files that are not at the root of your project directory (as opposed to using relative paths in code: #include "subdirectory/filename.h").
1
Open the Project Properties Window
Either right click on the top node of the project in the Project window and select Properties from the pop-up window, or from the File menu, select Project Properties (ProjectName).
2
Select the Compiler Options
Select the C compiler from the Categories list on the left side of the Project Properties window. In this example, the XC16 compiler (xc16-gcc) is selected.
3
Preprocessing and Messages Settings
Under the Option categories drop down menu select Preprocessing and messages
4
Add Include Directory Path(s)
Click on the text box next to the C include dirs item to open the C include dirs dialog box.
5
Create a New Path
Click on the Browse button, to select the desired directory.
