Nios® V Processor Software Developer Handbook

ID 743810
Date 10/31/2022
Public

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6.11.5.2. Use UNIX-Style File I/O

If you need to reduce the code footprint further, you can omit the newlib C library, and use the UNIX-style API.

For more information, refer to the UNIX-Style Interface chapter.

The Nios® V processor tools provide ANSI C file I/O, in the newlib C library, because there is a per-access performance overhead associated with accessing devices and files using the UNIX-style file I/O functions. The ANSI C file I/O provides buffered access, thereby reducing the total number of hardware I/O accesses performed. Also the ANSI C API is more flexible and therefore easier to use. However, these benefits are gained at the expense of code footprint.