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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2004 IEEE and The Open Group, All Rights Reserved --><title>cxref</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="cxref"></a> <a name="tag_04_32"></a><!-- cxref --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2004 Edition<br>Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_04_32_01"></a>NAME</h4><blockquote>cxref - generate a C-language program cross-reference table (<b>DEVELOPMENT</b>)</blockquote><h4><a name="tag_04_32_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> cxref</tt> <b>[</b><tt>-cs</tt><b>][</b><tt>-o</tt> <i>file</i><b>][</b><tt>-w</tt> <i>num</i><b>][</b><tt>-D</tt> <i>name</i><b>[</b><tt>=</tt><i>def</i><b>]]</b><tt>...</tt><b>[</b><tt>-I</tt> <i>dir</i><b>]</b><tt>...<br> </tt> <b>[</b><tt>-U</tt> <i>name</i><b>]</b><tt>...</tt> <i>file</i> <tt>... <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div></blockquote><h4><a name="tag_04_32_03"></a>DESCRIPTION</h4><blockquote><p>The <i>cxref</i> utility shall analyze a collection of C-language <i>file</i>s and attempt to build a cross-reference table.Information from <b>#define</b> lines shall be included in the symbol table. A sorted listing shall be written to standard outputof all symbols (auto, static, and global) in each <i>file</i> separately, or with the <b>-c</b> option, in combination. Each symbolshall contain an asterisk before the declaring reference.</p></blockquote><h4><a name="tag_04_32_04"></a>OPTIONS</h4><blockquote><p>The <i>cxref</i> utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap12.html#tag_12_02">Section 12.2, Utility Syntax Guidelines</a>, except that the order of the <b>-D</b>,<b>-I</b>, and <b>-U</b> options (which are identical to their interpretation by <a href="../utilities/c99.html"><i>c99</i></a>) issignificant. The following options shall be supported:</p><dl compact><dt><b>-c</b></dt><dd>Write a combined cross-reference of all input files.</dd><dt><b>-s</b></dt><dd>Operate silently; do not print input filenames.</dd><dt><b>-o </b> <i>file</i></dt><dd>Direct output to named <i>file</i>.</dd><dt><b>-w </b> <i>num</i></dt><dd>Format output no wider than <i>num</i> (decimal) columns. This option defaults to 80 if <i>num</i> is not specified or is lessthan 51.</dd><dt><b>-D</b></dt><dd>Equivalent to <a href="../utilities/c99.html"><i>c99</i></a>.</dd><dt><b>-I</b></dt><dd>Equivalent to <a href="../utilities/c99.html"><i>c99</i></a>.</dd><dt><b>-U</b></dt><dd>Equivalent to <a href="../utilities/c99.html"><i>c99</i></a>.</dd></dl></blockquote><h4><a name="tag_04_32_05"></a>OPERANDS</h4><blockquote><p>The following operand shall be supported:</p><dl compact><dt><i>file</i></dt><dd>A pathname of a C-language source file.</dd></dl></blockquote><h4><a name="tag_04_32_06"></a>STDIN</h4><blockquote><p>Not used.</p></blockquote><h4><a name="tag_04_32_07"></a>INPUT FILES</h4><blockquote><p>The input files are C-language source files.</p></blockquote><h4><a name="tag_04_32_08"></a>ENVIRONMENT VARIABLES</h4><blockquote><p>The following environment variables shall affect the execution of <i>cxref</i>:</p><dl compact><dt><i>LANG</i></dt><dd>Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap08.html#tag_08_02">Section 8.2, Internationalization Variables</a> forthe precedence of internationalization variables used to determine the values of locale categories.)</dd><dt><i>LC_ALL</i></dt><dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd><dt><i>LC_COLLATE</i></dt><dd>Determine the locale for the ordering of the output.</dd><dt><i>LC_CTYPE</i></dt><dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte asopposed to multi-byte characters in arguments and input files).</dd><dt><i>LC_MESSAGES</i></dt><dd>Determine the locale that should be used to affect the format and contents of diagnostic messages written to standarderror.</dd><dt><i>NLSPATH</i></dt><dd>Determine the location of message catalogs for the processing of <i>LC_MESSAGES .</i></dd></dl></blockquote><h4><a name="tag_04_32_09"></a>ASYNCHRONOUS EVENTS</h4><blockquote><p>Default.</p></blockquote><h4><a name="tag_04_32_10"></a>STDOUT</h4><blockquote><p>The standard output shall be used for the cross-reference listing, unless the <b>-o</b> option is used to select a differentoutput file.</p><p>The format of standard output is unspecified, except that the following information shall be included:</p><ul><li><p>If the <b>-c</b> option is not specified, each portion of the listing shall start with the name of the input file on a separateline.</p></li><li><p>The name line shall be followed by a sorted list of symbols, each with its associated location pathname, the name of thefunction in which it appears (if it is not a function name itself), and line number references.</p></li><li><p>Each line number may be preceded by an asterisk ( <tt>'*'</tt> ) flag, meaning that this is the declaring reference. Othersingle-character flags, with implementation-defined meanings, may be included.</p></li></ul></blockquote><h4><a name="tag_04_32_11"></a>STDERR</h4><blockquote><p>The standard error shall be used only for diagnostic messages.</p></blockquote><h4><a name="tag_04_32_12"></a>OUTPUT FILES</h4><blockquote><p>The output file named by the <b>-o</b> option shall be used instead of standard output.</p></blockquote><h4><a name="tag_04_32_13"></a>EXTENDED DESCRIPTION</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_32_14"></a>EXIT STATUS</h4><blockquote><p>The following exit values shall be returned:</p><dl compact><dt> 0</dt><dd>Successful completion.</dd><dt>>0</dt><dd>An error occurred.</dd></dl></blockquote><h4><a name="tag_04_32_15"></a>CONSEQUENCES OF ERRORS</h4><blockquote><p>Default.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_04_32_16"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_32_17"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_32_18"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_32_19"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_32_20"></a>SEE ALSO</h4><blockquote><p><a href="c99.html"><i>c99</i></a></p></blockquote><h4><a name="tag_04_32_21"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 2.</p></blockquote><h4><a name="tag_04_32_22"></a>Issue 5</h4><blockquote><p>In the SYNOPSIS, [ <b>-U</b> <i>dir</i>] is changed to [ <b>-U</b> <i>name</i>].</p></blockquote><h4><a name="tag_04_32_23"></a>Issue 6</h4><blockquote><p>The APPLICATION USAGE section is added.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
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