5.11.1 Standard Libraries
The Microchip Unified Standard Library encompasses the functions defined by the standard C language headers provided by the C99 language specification, as well as any types and preprocessor macros needed to facilitate their use. This library is shipped with all Microchip C Compilers.
The behavior of and interface to the library functions as well as the intended use of the library types and macros is described in the Microchip Unified Standard Library Reference Guide document.