Evo citat Microchip forum:
LINK
"The CCS compiler uses built in functions that are created by the compiler based on #use directives. There are no header files for those functions.
From here, to get rid of the unresolved identifiers you can do a couple different things:
1. Tools->Options->C++ Tab->Highlight Unresolved Identifiers Checkbox
2. Another option is to make a header file with forward declared versions of the functions. Note that since CCS allows function overloading, you only have to forward declare one version of the method. I actually use void function_name(); for all of the ones I use. "