--- /dev/null
+=encoding utf8
+
+=head1 NAME
+
+perl5235delta - what is new for perl v5.23.5
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.23.4 release and the 5.23.5
+release.
+
+If you are upgrading from an earlier release such as 5.23.3, first read
+L<perl5234delta>, which describes differences between 5.23.3 and 5.23.4.
+
+=head1 Performance Enhancements
+
+=over 4
+
+=item *
+
+Faster addition, subtraction and multiplication.
+
+Since 5.8.0, arithmetic became slower due to the need to support
+64-bit integers. To deal with 64-bit integers, a lot more corner
+cases need to be checked, which adds time. We now detect common
+cases where there is no need to check for those corner cases,
+and special-case them.
+
+=item *
+
+Faster preincrement, predecrement, postincrement, postdecrement.
+
+By internally splitting the functions which handled multiple
+cases into different functions.
+
+=back
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<arybase> has been upgraded from version 0.10 to 0.11.
+
+=item *
+
+L<B> has been upgraded from version 1.60 to 1.61.
+
+=item *
+
+L<base> has been upgraded from version 2.22 to 2.22_01.
+
+Better handling of attempts to load non-existent modules.
+Improvements to fields.pm documentation. L<base> now requires v5.8.0.
+
+=item *
+
+L<Carp> has been upgraded from version 1.37 to 1.38.
+
+Improvements when working with older perls.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.24 to 0.25.
+
+=item *
+
+L<Devel::Peek> has been upgraded from version 1.22 to 1.23.
+
+=item *
+
+L<Dumpvalue> has been upgraded from version 1.17 to 1.18.
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.35 to 1.36.
+
+=item *
+
+L<fields> has been upgraded from version 2.17 to 2.22_01.
+
+=item *
+
+L<File::Find> has been upgraded from version 1.31 to 1.32.
+
+Handles empty directory lists.
+
+=item *
+
+L<File::Spec> has been upgraded from version 3.58 to 3.59.
+
+=item *
+
+L<Getopt::Long> has been upgraded from version 2.47 to 2.48.
+
+Fixes an issue with C<< gnu_compat >>
+
+=item *
+
+L<Hash::Util::FieldHash> has been upgraded from version 1.17 to 1.18.
+
+=item *
+
+L<IPC::Open3> has been upgraded from version 1.19 to 1.20.
+
+Include the error message on C<< exec() >> failure.
+
+=item *
+
+L<Math::BigInt> has been upgraded from version 1.999704 to 1.999710.
+
+=item *
+
+L<Math::BigInt::FastCalc> has been upgraded from version 0.34 to 0.37.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20151020 to 5.20151120.
+
+=item *
+
+L<Module::Metadata> has been upgraded from version 1.000029 to 1.000030.
+
+Temp dirs cleaned up during tests. More accurately mark tests as TODO, so as to have a quieter and less confusing test run without passing TODO tests.
+
+=item *
+
+L<PerlIO::encoding> has been upgraded from version 0.22 to 0.23.
+
+=item *
+
+L<PerlIO::mmap> has been upgraded from version 0.014 to 0.015.
+
+=item *
+
+L<PerlIO::scalar> has been upgraded from version 0.23 to 0.24.
+
+=item *
+
+L<PerlIO::via> has been upgraded from version 0.15 to 0.16.
+
+=item *
+
+L<Pod::Simple> has been upgraded from version 3.30 to 3.32.
+
+Switched debugging output from C<< STDOUT >> to C<< STDERR >>.
+
+Added C<< errata_seen() >> to make POD errors easily accessible.
+
+Simplified the detection of case-insensitivity in Pod::Simple::Search.
+
+Fixed C<< Use of uninitialized value $1 in lc >> warning in
+Pod::Simple::Search.
+
+If C<< @INC >> includes the current directory symbol, C<.>, the
+C<< survey() >> method of C<< Pod::Simple::Search >> no longer excludes
+it from its list of directories to search. Instead, The C<< survey() >> and
+C<< find() >> methods now both exclude duplicate directories from C<< @INC >>
+(RT #102344).
+
+Moved source repository and updated links to new perl-pod GitHub
+organization: L<https://github.com/perl-pod/pod-simple>.
+
+Improved repository links and added GitHub issue tracking link to
+the distribution metadata.
+
+Switched from C<< File::Spec >>'s C<< catdir >> to C<< catfile >>
+for path names, to fix failures on VMS. Also now use Unix path semantics
+where they're not required to be platform-specific. (RT #105511).
+
+Improved the example use of the C<< html_encode_chars() >> method in
+the C<< Pod::Simple::XHTML >> documentation.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.58 to 1.59.
+
+=item *
+
+L<Thread::Queue> has been upgraded from version 3.06 to 3.07.
+
+=item *
+
+L<threads> has been upgraded from version 2.03 to 2.04.
+
+=item *
+
+L<threads::shared> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<Tie::Scalar> has been upgraded from version 1.03 to 1.04.
+
+=item *
+
+L<Time::HiRes> has been upgraded from version 1.9727_02 to 1.9728.
+
+=item *
+
+L<Time::Piece> has been upgraded from version 1.30 to 1.31.
+
+=item *
+
+L<Unicode::Normalize> has been upgraded from version 1.21 to 1.23.
+
+=item *
+
+L<XSLoader> has been upgraded from version 0.20 to 0.21.
+
+=back
+
+=head1 Diagnostics
+
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages. For the complete list of
+diagnostic messages, see L<perldiag>.
+
+=head2 New Diagnostics
+
+=head3 New Errors
+
+=over 4
+
+=item *
+
+L<<< Sequence (?... not terminated in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"Sequence (?... not terminated in regex; marked by <-- HERE in mE<sol>%sE<sol>" >>>
+
+=back
+
+=head2 Changes to Existing Diagnostics
+
+=over 4
+
+=item *
+
+When running out of memory during an attempt the increase the stack
+size, previously, perl would die using the cryptic message
+C<< panic: av_extend_guts() negative count (-9223372036854775681) >>.
+This has been fixed to show the prettier message:
+L<< Out of memory during stack extend|perldiag/"Out of memory during %s extend" >>
+
+=back
+
+=head1 Configuration and Compilation
+
+=over 4
+
+=item *
+
+C<Configure> now acts as if the C<-O> option is always passed, allowing command
+line options to override saved configuration. This should eliminate confusion
+when command line options are ignored for no obvious reason. C<-O> is now
+permitted, but ignored.
+
+=item *
+
+Some filesystem stat symbols which were not used by the Perl core
+were removed in an earlier commit. However, since these symbols
+turned out to be used by at least one CPAN module, these symbols
+have been restored.
+
+=item *
+
+C<< PPPort.so/PPPort.dll >> no longer get installed, as they are
+not used by C<< PPPort.pm >>, only by its test files.
+
+=item *
+
+It is now possible to specify which compilation date to show on
+C<< perl -V >> output, by setting the macro C<< PERL_BUILD_DATE >>.
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Win32
+
+Win32 does now a parallel build with C++.
+
+=item Tru64
+
+Workaround where Tru64 balks when prototypes are listed as
+C<< PERL_STATIC_INLINE >>, but where the test is build with
+C<< -DPERL_NO_INLINE_FUNCTIONS >>.
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item *
+
+C<< sv_ref() >> is now part of the API.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+C<\b{sb}> works much better. In Perl v5.22.0, this new construct didn't
+seem to give the expected results, yet passed all the tests in the
+extensive suite furnished by Unicode. It turns out that it was because
+these were short input strings, and the failures had to do with longer
+inputs. This was fixed in Perl 5.23.4, but the improvement was not
+noticed until after that was released, so is included here now.
+
+=item *
+
+Certain syntax errors in
+L<perlrecharclass/Extended Bracketed Character Classes> caused panics
+instead of the proper error message. This has now been fixed. [perl
+#126481]
+
+=item *
+
+An earlier commit added a message when a quantifier in a regular
+expression was useless, but then caused the parser to skip it;
+this caused the surplus quantifier to be silently ignored, instead
+of throwing an error. This is now fixed. [perl #126253]
+
+=item *
+
+The switch to building non-XS modules last in win32/makefile.mk (introduced
+by design as part of the changes to enable parallel building) caused the
+build of POSIX to break due to problems with the version module. This
+is now fixed.
+
+=item *
+
+Improved parsing of hex float constants.
+
+=item *
+
+Fixed an issue with C<< pack >> where C<< pack "H" >> (and C<< pack "h" >>)
+could read past the source when given a non-utf8 source, and a utf8 target.
+[perl #126325]
+
+=item *
+
+Fixed several cases where perl would abort due to a segmentation fault,
+or a C-level assert. [perl #126615], [perl #126602], [perl #126193].
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.23.5 represents approximately 4 weeks of development since Perl 5.23.4
+and contains approximately 12,000 lines of changes across 290 files from 23
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 6,400 lines of changes to 180 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed the
+improvements that became Perl 5.23.5:
+
+Aaron Crane, Abigail, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
+Mannsåker, Daniel Dragan, David Mitchell, Dr.Ruud, H.Merijn Brand, Ivan
+Pozdeev, James E Keenan, Jarkko Hietaniemi, Jerry D. Hedden, Karen Etheridge,
+Karl Williamson, Lukas Mai, Mohammed El-Afifi, Niko Tyni, Peter Rabbitson,
+Reini Urban, Ricardo Signes, Steve Hay, Tony Cook.
+
+The list above is almost certainly incomplete as it is automatically generated
+from version control history. In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
+
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
+
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the articles recently
+posted to the comp.lang.perl.misc newsgroup and the perl bug database at
+L<https://rt.perl.org/> . There may also be information at
+L<http://www.perl.org/> , the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<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 C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications, which make it
+inappropriate to send to a publicly archived mailing list, then please send it
+to perl5-security-report@perl.org. This points to a closed subscription
+unarchived mailing list, which includes all the core committers, who will be
+able to help assess the impact of issues, figure out a resolution, and help
+co-ordinate the release of patches to mitigate or fix the problem across all
+platforms on which Perl is supported. Please only use this address for
+security issues in the Perl core, not for modules independently distributed on
+CPAN.
+
+=head1 SEE ALSO
+
+The F<Changes> file for an explanation of how to view exhaustive details on
+what changed.
+
+The F<INSTALL> file for how to build Perl.
+
+The F<README> file for general stuff.
+
+The F<Artistic> and F<Copying> files for copyright information.
+
+=cut
=head1 NAME
-perldelta - what is new for perl v5.23.5
+[ this is a template for a new perldelta file. Any text flagged as XXX needs
+to be processed before release. ]
+
+perldelta - what is new for perl v5.23.6
=head1 DESCRIPTION
-This document describes differences between the 5.23.4 release and the 5.23.5
+This document describes differences between the 5.23.5 release and the 5.23.6
release.
-If you are upgrading from an earlier release such as 5.23.3, first read
-L<perl5234delta>, which describes differences between 5.23.3 and 5.23.4.
+If you are upgrading from an earlier release such as 5.23.4, first read
+L<perl5235delta>, which describes differences between 5.23.4 and 5.23.5.
-=head1 Performance Enhancements
+=head1 Notice
-=over 4
+XXX Any important notices here
-=item *
+=head1 Core Enhancements
-Faster addition, subtraction and multiplication.
+XXX New core language features go here. Summarize user-visible core language
+enhancements. Particularly prominent performance optimisations could go
+here, but most should go in the L</Performance Enhancements> section.
-Since 5.8.0, arithmetic became slower due to the need to support
-64-bit integers. To deal with 64-bit integers, a lot more corner
-cases need to be checked, which adds time. We now detect common
-cases where there is no need to check for those corner cases,
-and special-case them.
+[ List each enhancement as a =head2 entry ]
-=item *
+=head1 Security
-Faster preincrement, predecrement, postincrement, postdecrement.
+XXX Any security-related notices go here. In particular, any security
+vulnerabilities closed should be noted here rather than in the
+L</Selected Bug Fixes> section.
-By internally splitting the functions which handled multiple
-cases into different functions.
+[ List each security issue as a =head2 entry ]
-=back
+=head1 Incompatible Changes
-=head1 Modules and Pragmata
+XXX For a release on a stable branch, this section aspires to be:
-=head2 Updated Modules and Pragmata
+ There are no changes intentionally incompatible with 5.XXX.XXX
+ If any exist, they are bugs, and we request that you submit a
+ report. See L</Reporting Bugs> below.
-=over 4
+[ List each incompatible change as a =head2 entry ]
-=item *
+=head1 Deprecations
-L<arybase> has been upgraded from version 0.10 to 0.11.
+XXX Any deprecated features, syntax, modules etc. should be listed here.
-=item *
+=head2 Module removals
-L<B> has been upgraded from version 1.60 to 1.61.
+XXX Remove this section if inapplicable.
-=item *
+The following modules will be removed from the core distribution in a
+future release, and will at that time need to be installed from CPAN.
+Distributions on CPAN which require these modules will need to list them as
+prerequisites.
-L<base> has been upgraded from version 2.22 to 2.22_01.
+The core versions of these modules will now issue C<"deprecated">-category
+warnings to alert you to this fact. To silence these deprecation warnings,
+install the modules in question from CPAN.
-Better handling of attempts to load non-existent modules.
-Improvements to fields.pm documentation. L<base> now requires v5.8.0.
+Note that these are (with rare exceptions) fine modules that you are encouraged
+to continue to use. Their disinclusion from core primarily hinges on their
+necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
+not usually on concerns over their design.
-=item *
+=over
-L<Carp> has been upgraded from version 1.37 to 1.38.
+=item XXX
-Improvements when working with older perls.
+XXX Note that deprecated modules should be listed here even if they are listed
+as an updated module in the L</Modules and Pragmata> section.
-=item *
+=back
-L<Config::Perl::V> has been upgraded from version 0.24 to 0.25.
+[ List each other deprecation as a =head2 entry ]
-=item *
+=head1 Performance Enhancements
-L<Devel::Peek> has been upgraded from version 1.22 to 1.23.
+XXX Changes which enhance performance without changing behaviour go here.
+There may well be none in a stable release.
-=item *
+[ List each enhancement as a =item entry ]
-L<Dumpvalue> has been upgraded from version 1.17 to 1.18.
+=over 4
=item *
-L<DynaLoader> has been upgraded from version 1.35 to 1.36.
-
-=item *
+XXX
-L<fields> has been upgraded from version 2.17 to 2.22_01.
+=back
-=item *
+=head1 Modules and Pragmata
-L<File::Find> has been upgraded from version 1.31 to 1.32.
+XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
+go here. If Module::CoreList is updated, generate an initial draft of the
+following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
+for important changes should then be added by hand. In an ideal world,
+dual-life modules would have a F<Changes> file that could be cribbed.
-Handles empty directory lists.
+[ Within each section, list entries as a =item entry ]
-=item *
+=head2 New Modules and Pragmata
-L<File::Spec> has been upgraded from version 3.58 to 3.59.
+=over 4
=item *
-L<Getopt::Long> has been upgraded from version 2.47 to 2.48.
+XXX
-Fixes an issue with C<< gnu_compat >>
+=back
-=item *
+=head2 Updated Modules and Pragmata
-L<Hash::Util::FieldHash> has been upgraded from version 1.17 to 1.18.
+=over 4
=item *
-L<IPC::Open3> has been upgraded from version 1.19 to 1.20.
+L<XXX> has been upgraded from version A.xx to B.yy.
-Include the error message on C<< exec() >> failure.
+=back
-=item *
+=head2 Removed Modules and Pragmata
-L<Math::BigInt> has been upgraded from version 1.999704 to 1.999710.
+=over 4
=item *
-L<Math::BigInt::FastCalc> has been upgraded from version 0.34 to 0.37.
+XXX
-=item *
+=back
-L<Module::CoreList> has been upgraded from version 5.20151020 to 5.20151120.
+=head1 Documentation
-=item *
+XXX Changes to files in F<pod/> go here. Consider grouping entries by
+file and be sure to link to the appropriate page, e.g. L<perlfunc>.
-L<Module::Metadata> has been upgraded from version 1.000029 to 1.000030.
+=head2 New Documentation
-Temp dirs cleaned up during tests. More accurately mark tests as TODO, so as to have a quieter and less confusing test run without passing TODO tests.
+XXX Changes which create B<new> files in F<pod/> go here.
-=item *
+=head3 L<XXX>
-L<PerlIO::encoding> has been upgraded from version 0.22 to 0.23.
+XXX Description of the purpose of the new file here
-=item *
+=head2 Changes to Existing Documentation
-L<PerlIO::mmap> has been upgraded from version 0.014 to 0.015.
+XXX Changes which significantly change existing files in F<pod/> go here.
+However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
+section.
-=item *
+=head3 L<XXX>
-L<PerlIO::scalar> has been upgraded from version 0.23 to 0.24.
+=over 4
=item *
-L<PerlIO::via> has been upgraded from version 0.15 to 0.16.
+XXX Description of the change here
-=item *
+=back
-L<Pod::Simple> has been upgraded from version 3.30 to 3.32.
+=head1 Diagnostics
-Switched debugging output from C<< STDOUT >> to C<< STDERR >>.
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages. For the complete list of
+diagnostic messages, see L<perldiag>.
-Added C<< errata_seen() >> to make POD errors easily accessible.
+XXX New or changed warnings emitted by the core's C<C> code go here. Also
+include any changes in L<perldiag> that reconcile it to the C<C> code.
-Simplified the detection of case-insensitivity in Pod::Simple::Search.
+=head2 New Diagnostics
-Fixed C<< Use of uninitialized value $1 in lc >> warning in
-Pod::Simple::Search.
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
-If C<< @INC >> includes the current directory symbol, C<.>, the
-C<< survey() >> method of C<< Pod::Simple::Search >> no longer excludes
-it from its list of directories to search. Instead, The C<< survey() >> and
-C<< find() >> methods now both exclude duplicate directories from C<< @INC >>
-(RT #102344).
+=head3 New Errors
-Moved source repository and updated links to new perl-pod GitHub
-organization: L<https://github.com/perl-pod/pod-simple>.
+=over 4
-Improved repository links and added GitHub issue tracking link to
-the distribution metadata.
+=item *
-Switched from C<< File::Spec >>'s C<< catdir >> to C<< catfile >>
-for path names, to fix failures on VMS. Also now use Unix path semantics
-where they're not required to be platform-specific. (RT #105511).
+XXX L<message|perldiag/"message">
-Improved the example use of the C<< html_encode_chars() >> method in
-the C<< Pod::Simple::XHTML >> documentation.
+=back
-=item *
+=head3 New Warnings
-L<POSIX> has been upgraded from version 1.58 to 1.59.
+=over 4
=item *
-L<Thread::Queue> has been upgraded from version 3.06 to 3.07.
+XXX L<message|perldiag/"message">
-=item *
+=back
-L<threads> has been upgraded from version 2.03 to 2.04.
+=head2 Changes to Existing Diagnostics
-=item *
+XXX Changes (i.e. rewording) of diagnostic messages go here
-L<threads::shared> has been upgraded from version 1.48 to 1.49.
+=over 4
=item *
-L<Tie::Scalar> has been upgraded from version 1.03 to 1.04.
+XXX Describe change here
-=item *
+=back
-L<Time::HiRes> has been upgraded from version 1.9727_02 to 1.9728.
+=head1 Utility Changes
-=item *
+XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
+Most of these are built within the directory F<utils>.
-L<Time::Piece> has been upgraded from version 1.30 to 1.31.
+[ List utility changes as a =head2 entry for each utility and =item
+entries for each change
+Use L<XXX> with program names to get proper documentation linking. ]
-=item *
+=head2 L<XXX>
-L<Unicode::Normalize> has been upgraded from version 1.21 to 1.23.
+=over 4
=item *
-L<XSLoader> has been upgraded from version 0.20 to 0.21.
+XXX
=back
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
+=head1 Configuration and Compilation
-=head2 New Diagnostics
+XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
+go here. Any other changes to the Perl build process should be listed here.
+However, any platform-specific changes should be listed in the
+L</Platform Support> section, instead.
-=head3 New Errors
+[ List changes as a =item entry ].
=over 4
=item *
-L<<< Sequence (?... not terminated in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"Sequence (?... not terminated in regex; marked by <-- HERE in mE<sol>%sE<sol>" >>>
+XXX
=back
-=head2 Changes to Existing Diagnostics
+=head1 Testing
+
+XXX Any significant changes to the testing of a freshly built perl should be
+listed here. Changes which create B<new> files in F<t/> go here as do any
+large changes to the testing harness (e.g. when parallel testing was added).
+Changes to existing files in F<t/> aren't worth summarizing, although the bugs
+that they represent may be covered elsewhere.
+
+[ List each test improvement as a =item entry ]
=over 4
=item *
-When running out of memory during an attempt the increase the stack
-size, previously, perl would die using the cryptic message
-C<< panic: av_extend_guts() negative count (-9223372036854775681) >>.
-This has been fixed to show the prettier message:
-L<< Out of memory during stack extend|perldiag/"Out of memory during %s extend" >>
+XXX
=back
-=head1 Configuration and Compilation
+=head1 Platform Support
+
+XXX Any changes to platform support should be listed in the sections below.
+
+[ Within the sections, list each platform as a =item entry with specific
+changes as paragraphs below it. ]
+
+=head2 New Platforms
+
+XXX List any platforms that this version of perl compiles on, that previous
+versions did not. These will either be enabled by new files in the F<hints/>
+directories, or new subdirectories and F<README> files at the top level of the
+source tree.
=over 4
-=item *
+=item XXX-some-platform
-C<Configure> now acts as if the C<-O> option is always passed, allowing command
-line options to override saved configuration. This should eliminate confusion
-when command line options are ignored for no obvious reason. C<-O> is now
-permitted, but ignored.
+XXX
-=item *
+=back
-Some filesystem stat symbols which were not used by the Perl core
-were removed in an earlier commit. However, since these symbols
-turned out to be used by at least one CPAN module, these symbols
-have been restored.
+=head2 Discontinued Platforms
-=item *
+XXX List any platforms that this version of perl no longer compiles on.
-C<< PPPort.so/PPPort.dll >> no longer get installed, as they are
-not used by C<< PPPort.pm >>, only by its test files.
+=over 4
-=item *
+=item XXX-some-platform
-It is now possible to specify which compilation date to show on
-C<< perl -V >> output, by setting the macro C<< PERL_BUILD_DATE >>.
+XXX
=back
-=head1 Platform Support
-
=head2 Platform-Specific Notes
-=over 4
-
-=item Win32
+XXX List any changes for specific platforms. This could include configuration
+and compilation changes or changes in portability/compatibility. However,
+changes within modules for platforms should generally be listed in the
+L</Modules and Pragmata> section.
-Win32 does now a parallel build with C++.
+=over 4
-=item Tru64
+=item XXX-some-platform
-Workaround where Tru64 balks when prototypes are listed as
-C<< PERL_STATIC_INLINE >>, but where the test is build with
-C<< -DPERL_NO_INLINE_FUNCTIONS >>.
+XXX
=back
=head1 Internal Changes
+XXX Changes which affect the interface available to C<XS> code go here. Other
+significant internal changes for future core maintainers should be noted as
+well.
+
+[ List each change as a =item entry ]
+
=over 4
=item *
-C<< sv_ref() >> is now part of the API.
+XXX
=back
=head1 Selected Bug Fixes
-=over 4
+XXX Important bug fixes in the core language are summarized here. Bug fixes in
+files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
-=item *
+[ List each fix as a =item entry ]
-C<\b{sb}> works much better. In Perl v5.22.0, this new construct didn't
-seem to give the expected results, yet passed all the tests in the
-extensive suite furnished by Unicode. It turns out that it was because
-these were short input strings, and the failures had to do with longer
-inputs. This was fixed in Perl 5.23.4, but the improvement was not
-noticed until after that was released, so is included here now.
+=over 4
=item *
-Certain syntax errors in
-L<perlrecharclass/Extended Bracketed Character Classes> caused panics
-instead of the proper error message. This has now been fixed. [perl
-#126481]
+XXX
-=item *
-
-An earlier commit added a message when a quantifier in a regular
-expression was useless, but then caused the parser to skip it;
-this caused the surplus quantifier to be silently ignored, instead
-of throwing an error. This is now fixed. [perl #126253]
+=back
-=item *
+=head1 Known Problems
-The switch to building non-XS modules last in win32/makefile.mk (introduced
-by design as part of the changes to enable parallel building) caused the
-build of POSIX to break due to problems with the version module. This
-is now fixed.
+XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
+tests that had to be C<TODO>ed for the release would be noted here. Unfixed
+platform specific bugs also go here.
-=item *
+[ List each fix as a =item entry ]
-Improved parsing of hex float constants.
+=over 4
=item *
-Fixed an issue with C<< pack >> where C<< pack "H" >> (and C<< pack "h" >>)
-could read past the source when given a non-utf8 source, and a utf8 target.
-[perl #126325]
+XXX
-=item *
+=back
-Fixed several cases where perl would abort due to a segmentation fault,
-or a C-level assert. [perl #126615], [perl #126602], [perl #126193].
+=head1 Errata From Previous Releases
-=back
+=over 4
-=head1 Acknowledgements
+=item *
-Perl 5.23.5 represents approximately 4 weeks of development since Perl 5.23.4
-and contains approximately 12,000 lines of changes across 290 files from 23
-authors.
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
-Excluding auto-generated files, documentation and release tools, there were
-approximately 6,400 lines of changes to 180 .pm, .t, .c and .h files.
+=back
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.23.5:
+=head1 Obituary
-Aaron Crane, Abigail, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
-Mannsåker, Daniel Dragan, David Mitchell, Dr.Ruud, H.Merijn Brand, Ivan
-Pozdeev, James E Keenan, Jarkko Hietaniemi, Jerry D. Hedden, Karen Etheridge,
-Karl Williamson, Lukas Mai, Mohammed El-Afifi, Niko Tyni, Peter Rabbitson,
-Reini Urban, Ricardo Signes, Steve Hay, Tony Cook.
+XXX If any significant core contributor has died, we've added a short obituary
+here.
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
+=head1 Acknowledgements
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
+XXX Generate this with:
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
+ perl Porting/acknowledgements.pl v5.23.5..HEAD
=head1 Reporting Bugs