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This section describes some of the practical issues involved in using the GNU C Library.
| • Header Files: | How to include the header files in your programs. | |
| • Macro Definitions: | Some functions in the library may really be implemented as macros. | |
| • Reserved Names: | The C standard reserves some names for the library, and some for users. | |
| • Feature Test Macros: | How to control what names are defined. |