The C standard libraries contain a standardized collection of functions, such as string and math routines. These functions are listed in Library Functions.
The libraries also contain C routines that are implicitly called by programs to perform tasks such as floating-point operations and integer division. These routines do not directly correspond to a function call in the source code.
And finally, there are several library functions, such as functions relating to function-level profiling, mid-range EEPROM access, REALICE trace and log etc., that are built with the program as required. These will not be found in any library file.