4.3.1 Library Files
The C standard libraries contain a standardized collection of functions, such as string, math and input/output routines. The usage and operation of these functions is described in 9.1 Library Example Code. For more information on creating and using your own libraries, see 5.11 Libraries.
These libraries are built multiple times with a permuted set of options. When the compiler driver is called to compile and link an application, the driver chooses the appropriate target library that has been built with the same options. You do not normally need to specify the search path for the standard libraries, nor manually include library files into your project.