| <html lang="en"> |
| <head> |
| <title>XPG - The GNU C Library</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="The GNU C Library"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Standards-and-Portability.html#Standards-and-Portability" title="Standards and Portability"> |
| <link rel="prev" href="SVID.html#SVID" title="SVID"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU C library. |
| |
| This is Edition 0.12, last updated 2007-10-27, |
| of `The GNU C Library Reference Manual', for version |
| 2.8 (Sourcery G++ Lite 2011.03-41). |
| |
| Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, |
| 2003, 2007, 2008, 2010 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Free Software Needs Free Documentation'' |
| and ``GNU Lesser General Public License'', the Front-Cover texts being |
| ``A GNU Manual'', and with the Back-Cover Texts as in (a) below. A |
| copy of the license is included in the section entitled "GNU Free |
| Documentation License". |
| |
| (a) The FSF's Back-Cover Text is: ``You have the freedom to |
| copy and modify this GNU manual. Buying copies from the FSF |
| supports it in developing GNU and promoting software freedom.''--> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| <link rel="stylesheet" type="text/css" href="../cs.css"> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="XPG"></a> |
| <p> |
| Previous: <a rel="previous" accesskey="p" href="SVID.html#SVID">SVID</a>, |
| Up: <a rel="up" accesskey="u" href="Standards-and-Portability.html#Standards-and-Portability">Standards and Portability</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">1.2.5 XPG (The X/Open Portability Guide)</h4> |
| |
| <p>The X/Open Portability Guide, published by the X/Open Company, Ltd., is |
| a more general standard than POSIX. X/Open owns the Unix copyright and |
| the XPG specifies the requirements for systems which are intended to be |
| a Unix system. |
| |
| <p>The GNU C library complies to the X/Open Portability Guide, Issue 4.2, |
| with all extensions common to XSI (X/Open System Interface) |
| compliant systems and also all X/Open UNIX extensions. |
| |
| <p>The additions on top of POSIX are mainly derived from functionality |
| available in System V<!-- /@w --> and BSD systems. Some of the really bad |
| mistakes in System V<!-- /@w --> systems were corrected, though. Since |
| fulfilling the XPG standard with the Unix extensions is a |
| precondition for getting the Unix brand chances are good that the |
| functionality is available on commercial systems. |
| |
| </body></html> |
| |
