mingw/html/pod/perl582delta.html

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  13 <big><strong><span class="block">&nbsp;perl582delta - what is new for perl v5.8.2</span></strong></big>
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  17 <p><a name="__index__"></a></p>
  18 <!-- INDEX BEGIN -->
  19
  20 <ul>
  21
  22         <li><a href="#name">NAME</a></li>
  23         <li><a href="#description">DESCRIPTION</a></li>
  24         <li><a href="#incompatible_changes">Incompatible Changes</a></li>
  25         <li><a href="#core_enhancements">Core Enhancements</a></li>
  26         <ul>
  27
  28                 <li><a href="#hash_randomisation">Hash Randomisation</a></li>
  29                 <li><a href="#threading">Threading</a></li>
  30         </ul>
  31
  32         <li><a href="#modules_and_pragmata">Modules and Pragmata</a></li>
  33         <ul>
  34
  35                 <li><a href="#updated_modules_and_pragmata">Updated Modules And Pragmata</a></li>
  36         </ul>
  37
  38         <li><a href="#selected_bug_fixes">Selected Bug Fixes</a></li>
  39         <li><a href="#changed_internals">Changed Internals</a></li>
  40         <li><a href="#platform_specific_problems">Platform Specific Problems</a></li>
  41         <li><a href="#future_directions">Future Directions</a></li>
  42         <li><a href="#reporting_bugs">Reporting Bugs</a></li>
  43         <li><a href="#see_also">SEE ALSO</a></li>
  44 </ul>
  45 <!-- INDEX END -->
  46
  47 <hr />
  48 <p>
  49 </p>
  50 <h1><a name="name">NAME</a></h1>
  51 <p>perl582delta - what is new for perl v5.8.2</p>
  52 <p>
  53 </p>
  54 <hr />
  55 <h1><a name="description">DESCRIPTION</a></h1>
  56 <p>This document describes differences between the 5.8.1 release and
  57 the 5.8.2 release.</p>
  58 <p>If you are upgrading from an earlier release such as 5.6.1, first read
  59 the <a href="file://C|\msysgit\mingw\html/pod/perl58delta.html">the perl58delta manpage</a>, which describes differences between 5.6.0 and
  60 5.8.0, and the <a href="file://C|\msysgit\mingw\html/pod/perl581delta.html">the perl581delta manpage</a>, which describes differences between
  61 5.8.0 and 5.8.1.</p>
  62 <p>
  63 </p>
  64 <hr />
  65 <h1><a name="incompatible_changes">Incompatible Changes</a></h1>
  66 <p>For threaded builds for modules calling certain re-entrant system calls,
  67 binary compatibility was accidentally lost between 5.8.0 and 5.8.1.
  68 Binary compatibility with 5.8.0 has been restored in 5.8.2, which
  69 necessitates breaking compatibility with 5.8.1. We see this as the
  70 lesser of two evils.</p>
  71 <p>This will only affect people who have a threaded perl 5.8.1, and compiled
  72 modules which use these calls, and now attempt to run the compiled modules
  73 with 5.8.2. The fix is to re-compile and re-install the modules using 5.8.2.</p>
  74 <p>
  75 </p>
  76 <hr />
  77 <h1><a name="core_enhancements">Core Enhancements</a></h1>
  78 <p>
  79 </p>
  80 <h2><a name="hash_randomisation">Hash Randomisation</a></h2>
  81 <p>The hash randomisation introduced with 5.8.1 has been amended. It
  82 transpired that although the implementation introduced in 5.8.1 was source
  83 compatible with 5.8.0, it was not binary compatible in certain cases. 5.8.2
  84 contains an improved implementation which is both source and binary
  85 compatible with both 5.8.0 and 5.8.1, and remains robust against the form of
  86 attack which prompted the change for 5.8.1.</p>
  87 <p>We are grateful to the Debian project for their input in this area.
  88 See <a href="file://C|\msysgit\mingw\html/pod/perlsec.html#algorithmic_complexity_attacks">Algorithmic Complexity Attacks in the perlsec manpage</a> for the original
  89 rationale behind this change.</p>
  90 <p>
  91 </p>
  92 <h2><a name="threading">Threading</a></h2>
  93 <p>Several memory leaks associated with variables shared between threads
  94 have been fixed.</p>
  95 <p>
  96 </p>
  97 <hr />
  98 <h1><a name="modules_and_pragmata">Modules and Pragmata</a></h1>
  99 <p>
 100 </p>
 101 <h2><a name="updated_modules_and_pragmata">Updated Modules And Pragmata</a></h2>
 102 <p>The following modules and pragmata have been updated since Perl 5.8.1:</p>
 103 <dl>
 104 <dt><strong><a name="item_devel_3a_3appport">Devel::PPPort</a></strong>
 105
 106 <dt><strong><a name="item_digest_3a_3amd5">Digest::MD5</a></strong>
 107
 108 <dt><strong><a name="item_i18n_3a_3alangtags">I18N::LangTags</a></strong>
 109
 110 <dt><strong><a name="item_libnet">libnet</a></strong>
 111
 112 <dt><strong><a name="item_mime_3a_3abase64">MIME::Base64</a></strong>
 113
 114 <dt><strong><a name="item_pod_3a_3aperldoc">Pod::Perldoc</a></strong>
 115
 116 <dt><strong><a name="item_strict">strict</a></strong>
 117
 118 <dd>
 119 <p>Documentation improved</p>
 120 </dd>
 121 </li>
 122 <dt><strong><a name="item_tie_3a_3ahash">Tie::Hash</a></strong>
 123
 124 <dd>
 125 <p>Documentation improved</p>
 126 </dd>
 127 </li>
 128 <dt><strong><a name="item_time_3a_3ahires">Time::HiRes</a></strong>
 129
 130 <dt><strong><a name="item_unicode_3a_3acollate">Unicode::Collate</a></strong>
 131
 132 <dt><strong><a name="item_unicode_3a_3anormalize">Unicode::Normalize</a></strong>
 133
 134 <dt><strong><a name="item_universal">UNIVERSAL</a></strong>
 135
 136 <dd>
 137 <p>Documentation improved</p>
 138 </dd>
 139 </li>
 140 </dl>
 141 <p>
 142 </p>
 143 <hr />
 144 <h1><a name="selected_bug_fixes">Selected Bug Fixes</a></h1>
 145 <p>Some syntax errors involving unrecognized filetest operators are now handled
 146 correctly by the parser.</p>
 147 <p>
 148 </p>
 149 <hr />
 150 <h1><a name="changed_internals">Changed Internals</a></h1>
 151 <p>Interpreter initialization is more complete when -DMULTIPLICITY is off.
 152 This should resolve problems with initializing and destroying the Perl
 153 interpreter more than once in a single process.</p>
 154 <p>
 155 </p>
 156 <hr />
 157 <h1><a name="platform_specific_problems">Platform Specific Problems</a></h1>
 158 <p>Dynamic linker flags have been tweaked for Solaris and OS X, which should
 159 solve problems seen while building some XS modules.</p>
 160 <p>Bugs in OS/2 sockets and tmpfile have been fixed.</p>
 161 <p>In OS X <code>setreuid</code> and friends are troublesome - perl will now work
 162 around their problems as best possible.</p>
 163 <p>
 164 </p>
 165 <hr />
 166 <h1><a name="future_directions">Future Directions</a></h1>
 167 <p>Starting with 5.8.3 we intend to make more frequent maintenance releases,
 168 with a smaller number of changes in each. The intent is to propagate
 169 bug fixes out to stable releases more rapidly and make upgrading stable
 170 releases less of an upheaval. This should give end users more
 171 flexibility in their choice of upgrade timing, and allow them easier
 172 assessment of the impact of upgrades. The current plan is for code freezes
 173 as follows</p>
 174 <ul>
 175 <li>
 176 <p>5.8.3 23:59:59 GMT, Wednesday December 31st 2003</p>
 177 </li>
 178 <li>
 179 <p>5.8.4 23:59:59 GMT, Wednesday March 31st 2004</p>
 180 </li>
 181 <li>
 182 <p>5.8.5 23:59:59 GMT, Wednesday June 30th 2004</p>
 183 </li>
 184 </ul>
 185 <p>with the release following soon after, when testing is complete.</p>
 186 <p>See <a href="file://C|\msysgit\mingw\html/pod/perl581delta.html#future_directions">Future Directions in the perl581delta manpage</a> for more soothsaying.</p>
 187 <p>
 188 </p>
 189 <hr />
 190 <h1><a name="reporting_bugs">Reporting Bugs</a></h1>
 191 <p>If you find what you think is a bug, you might check the articles
 192 recently posted to the comp.lang.perl.misc newsgroup and the perl
 193 bug database at <a href="http://bugs.perl.org/.">http://bugs.perl.org/.</a>  There may also be
 194 information at <a href="http://www.perl.com/,">http://www.perl.com/,</a> the Perl Home Page.</p>
 195 <p>If you believe you have an unreported bug, please run the <strong>perlbug</strong>
 196 program included with your release.  Be sure to trim your bug down
 197 to a tiny but sufficient test case.  Your bug report, along with the
 198 output of <code>perl -V</code>, will be sent off to <a href="mailto:perlbug@perl.org">perlbug@perl.org</a> to be
 199 analysed by the Perl porting team.  You can browse and search
 200 the Perl 5 bugs at <a href="http://bugs.perl.org/">http://bugs.perl.org/</a></p>
 201 <p>
 202 </p>
 203 <hr />
 204 <h1><a name="see_also">SEE ALSO</a></h1>
 205 <p>The <em>Changes</em> file for exhaustive details on what changed.</p>
 206 <p>The <em>INSTALL</em> file for how to build Perl.</p>
 207 <p>The <em>README</em> file for general stuff.</p>
 208 <p>The <em>Artistic</em> and <em>Copying</em> files for copyright information.</p>
 209 <table border="0" width="100%" cellspacing="0" cellpadding="3">
 210 <tr><td class="block" style="background-color: #cccccc" valign="middle">
 211 <big><strong><span class="block">&nbsp;perl582delta - what is new for perl v5.8.2</span></strong></big>
 212 </td></tr>
 213 </table>
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