3.6.12.2 I: Specify Include File Search Path Option

The -Idir option adds the directory dir to the head of the list of directories to be searched for header files. A space may be present between the option and directory name.

The option can specify either an absolute or relative path and it can be used more than once if multiple additional directories are to be searched, in which case they are scanned from left to right. The standard system directories are searched after scanning the directories specified with this option.

Under the Windows OS, the use of the directory backslash character may unintentionally form an escape sequence. To specify an include file path that ends with a directory separator character and which is quoted, use -I "E:\\", for example, instead of -I "E:\", to avoid the escape sequence \“. Note that MPLAB X IDE will quote any include file path you specify in the project properties and that search paths are relative to the output directory, not the project directory.

Note: Do not use this option to specify any MPLAB XC8 system include paths. The compiler drivers automatically select the default language libraries and their respective include-file directory for you. Manually adding a system include path may disrupt this mechanism and cause the incorrect files to be compiled into your project, causing a conflict between the include files and the library. Note that adding a system include path to your project properties has never been a recommended practice.