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📁 by Randal L. Schwartz and Tom Phoenix ISBN 0-596-00132-0 Third Edition, published July 2001. (See
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<html><head><title>Config (Perl in a Nutshell, 2nd Edition)</title><link rel="stylesheet" type="text/css" href="../style/style1.css" /><meta name="DC.Creator" content="Stephen Spainhour" /><meta name="DC.Format" content="text/xml" scheme="MIME" /><meta name="DC.Language" content="en-US" /><meta name="DC.Publisher" content="O'Reilly &amp; Associates, Inc." /><meta name="DC.Source" scheme="ISBN" content="0596002416L" /><meta name="DC.Subject.Keyword" content="stuff" /><meta name="DC.Title" content="Perl in a Nutshell, 2nd Edition" /><meta name="DC.Type" content="Text.Monograph" /></head><body bgcolor="#ffffff"><img src="gifs/smbanner.gif" usemap="#banner-map" border="0" alt="Book Home" /><map name="banner-map"><area shape="rect" coords="1,-2,616,66" href="index.htm" alt="Java and XSLT" /><area shape="rect" coords="629,-11,726,25" href="jobjects/fsearch.htm" alt="Search this book" /></map><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_43.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228" /><td align="right" valign="top" width="228"><a href="ch08_45.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr></table></div><h2 class="sect1">8.44. Config</h2><p><a name="INDEX-1329" />Used to accessconfiguration information. When Perl is built, the Configure scriptobtains and saves this information in a hash,<tt class="literal">%Config</tt>, in <em class="emphasis">Config.pm</em> itself.Config checks to be sure it's running with the samePerl version as the one that created the hash.</p><p>The index into the hash is the shell variable name.<tt class="literal">%Config</tt> is always exported; the following threefunctions are exported on request.</p><a name="INDEX-1330" /><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>config_sh</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre><a name="INDEX-1330" />config_sh</pre><p>Returns all Perl configuration information. </p><blockquote><pre class="code">use Config(qw(config_sh));print config_sh( );</pre></blockquote><p>returns: </p><blockquote><pre class="code">archlibexp='sun4-solaris'cc='cc'ccflags='-I/usr/local/include/sfio -I/usr/local/include'...</pre></blockquote></div><a name="INDEX-1331" /><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>config_vars</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre><a name="INDEX-1331" />config_vars (<em class="replaceable">names</em>)</pre><p>Returns the name/value pairs for the requested configurationvariables. Prints the results to STDOUT.</p><blockquote><pre class="code">use Config(qw(config_vars));print config_vars(qw(osname ccflags));</pre></blockquote><p>returns: </p><blockquote><pre class="code">osname='solaris'ccflags='-I/usr/local/include/sfio -I/usr/local/include'</pre></blockquote></div><a name="INDEX-1332" /><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>myconfig</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre><a name="INDEX-1332" />myconfig</pre><p>Returns a summary of the major Perl configuration values.</p></div><hr width="684" align="left" /><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_43.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228"><a href="index.htm"><img src="../gifs/txthome.gif" alt="Home" border="0" /></a></td><td align="right" valign="top" width="228"><a href="ch08_45.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr><tr><td align="left" valign="top" width="228">8.43. Class::Struct</td><td align="center" valign="top" width="228"><a href="index/index.htm"><img src="../gifs/index.gif" alt="Book Index" border="0" /></a></td><td align="right" valign="top" width="228">8.45. constant</td></tr></table></div><hr width="684" align="left" /><img src="../gifs/navbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links" /><p><p><font size="-1"><a href="copyrght.htm">Copyright &copy; 2002</a> O'Reilly &amp; Associates. 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