5.5 Library Functions

The following macros check for particular C library functions. If there is no macro specifically defined to check for a function you need, and you don't need to check for any special properties of it, then you can use one of the general function-check macros.

5.5.1 Portability of C Functions		Pitfalls with usual functions
5.5.2 Particular Function Checks		Special handling to find certain functions
5.5.3 Generic Function Checks		How to find other functions