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| <h3 class="section">1.2 Standards and Portability</h3> |
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| <p><a name="index-standards-2"></a> |
| This section discusses the various standards and other sources that the |
| GNU C library is based upon. These sources include the ISO C<!-- /@w --> and |
| POSIX standards, and the System V and Berkeley Unix implementations. |
| |
| <p>The primary focus of this manual is to tell you how to make effective |
| use of the GNU library facilities. But if you are concerned about |
| making your programs compatible with these standards, or portable to |
| operating systems other than GNU, this can affect how you use the |
| library. This section gives you an overview of these standards, so that |
| you will know what they are when they are mentioned in other parts of |
| the manual. |
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| <p>See <a href="Library-Summary.html#Library-Summary">Library Summary</a>, for an alphabetical list of the functions and |
| other symbols provided by the library. This list also states which |
| standards each function or symbol comes from. |
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| <ul class="menu"> |
| <li><a accesskey="1" href="ISO-C.html#ISO-C">ISO C</a>: The international standard for the C |
| programming language. |
| <li><a accesskey="2" href="POSIX.html#POSIX">POSIX</a>: The ISO/IEC 9945 (aka IEEE 1003) standards |
| for operating systems. |
| <li><a accesskey="3" href="Berkeley-Unix.html#Berkeley-Unix">Berkeley Unix</a>: BSD and SunOS. |
| <li><a accesskey="4" href="SVID.html#SVID">SVID</a>: The System V Interface Description. |
| <li><a accesskey="5" href="XPG.html#XPG">XPG</a>: The X/Open Portability Guide. |
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