MirOS Manual: perl582delta(1)


PERL582DELTA(1) Perl Programmers Reference Guide  PERL582DELTA(1)

NAME

     perl582delta - what is new for perl v5.8.2

DESCRIPTION

     This document describes differences between the 5.8.1
     release and the 5.8.2 release.

     If you are upgrading from an earlier release such as 5.6.1,
     first read the perl58delta, which describes differences
     between 5.6.0 and 5.8.0, and the perl581delta, which
     describes differences between 5.8.0 and 5.8.1.

Incompatible Changes

     For threaded builds for modules calling certain re-entrant
     system calls, binary compatibility was accidentally lost
     between 5.8.0 and 5.8.1. Binary compatibility with 5.8.0 has
     been restored in 5.8.2, which necessitates breaking compati-
     bility with 5.8.1. We see this as the lesser of two evils.

     This will only affect people who have a threaded perl 5.8.1,
     and compiled modules which use these calls, and now attempt
     to run the compiled modules with 5.8.2. The fix is to re-
     compile and re-install the modules using 5.8.2.

Core Enhancements

     Hash Randomisation

     The hash randomisation introduced with 5.8.1 has been
     amended. It transpired that although the implementation
     introduced in 5.8.1 was source compatible with 5.8.0, it was
     not binary compatible in certain cases. 5.8.2 contains an
     improved implementation which is both source and binary com-
     patible with both 5.8.0 and 5.8.1, and remains robust
     against the form of attack which prompted the change for
     5.8.1.

     We are grateful to the Debian project for their input in
     this area. See "Algorithmic Complexity Attacks" in perlsec
     for the original rationale behind this change.

     Threading

     Several memory leaks associated with variables shared
     between threads have been fixed.

Modules and Pragmata

     Updated Modules And Pragmata

     The following modules and pragmata have been updated since
     Perl 5.8.1:

     Devel::PPPort

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     Digest::MD5
     I18N::LangTags
     libnet
     MIME::Base64
     Pod::Perldoc
     strict
         Documentation improved

     Tie::Hash
         Documentation improved

     Time::HiRes
     Unicode::Collate
     Unicode::Normalize
     UNIVERSAL
         Documentation improved

Selected Bug Fixes

     Some syntax errors involving unrecognized filetest operators
     are now handled correctly by the parser.

Changed Internals

     Interpreter initialization is more complete when -DMULTIPLI-
     CITY is off. This should resolve problems with initializing
     and destroying the Perl interpreter more than once in a sin-
     gle process.

Platform Specific Problems

     Dynamic linker flags have been tweaked for Solaris and OS X,
     which should solve problems seen while building some XS
     modules.

     Bugs in OS/2 sockets and tmpfile have been fixed.

     In OS X "setreuid" and friends are troublesome - perl will
     now work around their problems as best possible.

Future Directions

     Starting with 5.8.3 we intend to make more frequent mainte-
     nance releases, with a smaller number of changes in each.
     The intent is to propagate bug fixes out to stable releases
     more rapidly and make upgrading stable releases less of an
     upheaval. This should give end users more flexibility in
     their choice of upgrade timing, and allow them easier
     assessment of the impact of upgrades. The current plan is
     for code freezes as follows

     +   5.8.3 23:59:59 GMT, Wednesday December 31st 2003

     +   5.8.4 23:59:59 GMT, Wednesday March 31st 2004

     +   5.8.5 23:59:59 GMT, Wednesday June 30th 2004

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     with the release following soon after, when testing is com-
     plete.

     See "Future Directions" in perl581delta for more soothsay-
     ing.

Reporting Bugs

     If you find what you think is a bug, you might check the
     articles recently posted to the comp.lang.perl.misc news-
     group and the perl bug database at http://bugs.perl.org/.
     There may also be information at http://www.perl.com/, the
     Perl Home Page.

     If you believe you have an unreported bug, please run the
     perlbug program included with your release.  Be sure to trim
     your bug down to a tiny but sufficient test case.  Your bug
     report, along with the output of "perl -V", will be sent off
     to perlbug@perl.org to be analysed by the Perl porting team.
     You can browse and search the Perl 5 bugs at
     http://bugs.perl.org/

SEE ALSO

     The Changes file for exhaustive details on what changed.

     The INSTALL file for how to build Perl.

     The README file for general stuff.

     The Artistic and Copying files for copyright information.

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