New perldelta.

10 files changed, 622 insertions, 200 deletions

diff --git a/MANIFEST b/MANIFEST
index 8479f032c9..a05b9c63b6 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -4451,6 +4451,7 @@ pod/perl5200delta.pod		Perl changes in version 5.20.0
 pod/perl5210delta.pod		Perl changes in version 5.21.0
 pod/perl5211delta.pod		Perl changes in version 5.21.1
 pod/perl5212delta.pod		Perl changes in version 5.21.2
+pod/perl5213delta.pod		Perl changes in version 5.21.3
 pod/perl561delta.pod		Perl changes in version 5.6.1
 pod/perl56delta.pod		Perl changes in version 5.6
 pod/perl581delta.pod		Perl changes in version 5.8.1
diff --git a/Makefile.SH b/Makefile.SH
index cbeed004ab..665ff688b3 100755
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -489,7 +489,7 @@ mini_obj = $(minindt_obj) $(MINIDTRACE_O)
 ndt_obj = $(obj0) $(obj1) $(obj2) $(obj3) $(ARCHOBJS)
 obj = $(ndt_obj) $(DTRACE_O)
 
-perltoc_pod_prereqs = extra.pods pod/perl5213delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5214delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
 generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs)
 generated_headers = uudmap.h bitcount.h mg_data.h
 
@@ -999,9 +999,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc
 pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST
 	$(MINIPERL) pod/perlmodlib.PL -q
 
-pod/perl5213delta.pod: pod/perldelta.pod
-	$(RMS) pod/perl5213delta.pod
-	$(LNS) perldelta.pod pod/perl5213delta.pod
+pod/perl5214delta.pod: pod/perldelta.pod
+	$(RMS) pod/perl5214delta.pod
+	$(LNS) perldelta.pod pod/perl5214delta.pod
 
 extra.pods: $(MINIPERL_EXE)
 	-@test ! -f extra.pods || rm -f `cat extra.pods`
diff --git a/pod/.gitignore b/pod/.gitignore
index 63b25c41c6..48857fe4af 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -53,7 +53,7 @@
 /roffitall
 
 # generated
-/perl5213delta.pod
+/perl5214delta.pod
 /perlapi.pod
 /perlintern.pod
 *.html
diff --git a/pod/perl.pod b/pod/perl.pod
index 5599bc29d5..44adb8e9a5 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -179,6 +179,7 @@ aux a2p c2ph h2ph h2xs perlbug pl2pm pod2html pod2man s2p splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5213delta Perl changes in version 5.21.3
     perl5212delta Perl changes in version 5.21.2
     perl5211delta Perl changes in version 5.21.1
     perl5210delta Perl changes in version 5.21.0
diff --git a/pod/perl5213delta.pod b/pod/perl5213delta.pod
new file mode 100644
index 0000000000..58b86a2a47
--- /dev/null
+++ b/pod/perl5213delta.pod
@@ -0,0 +1,422 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5213delta - what is new for perl v5.21.3
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.21.2 release and the 5.21.3
+release.
+
+If you are upgrading from an earlier release such as 5.21.1, first read
+L<perl5212delta>, which describes differences between 5.21.1 and 5.21.2.
+
+=head1 Core Enhancements
+
+=head2 C<defined(@array = LIST)> is no longer fatal
+
+In 5.21.1, C<defined(@array)> was made fatal.  This has been relaxed
+to not die if the argument is assigning to an array.
+
+=head2 Floating point parsing has been improved
+
+Parsing and printing of floating point values has been improved.
+
+As a completely new feature, hexadecimal floating point literals
+(like 0x1.23p-4)  are now supported, and they can be output with
+C<printf %a>.
+
+=head1 Security
+
+=head2 The L<Safe> module could allow outside packages to be replaced
+
+Critical bugfix: outside packages could be replaced.  L<Safe> has
+been patched to 2.38 to address this.
+
+=head1 Incompatible Changes
+
+=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
+
+Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
+is now a fatal error.  S<C<"use UNIVERSAL">> without any arguments is still
+allowed.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<B::Debug> has been upgraded from version 1.19 to 1.21.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.20 to 0.22.
+
+=item *
+
+L<CPAN::Meta> has been upgraded from version 2.141520 to 2.142060.
+
+=item *
+
+L<CPAN::Meta::Requirements> has been upgraded from version 2.125 to 2.126.
+
+=item *
+
+L<ExtUtils::CBuilder> was moved from F<dist> to F<cpan>.
+
+=item *
+
+L<ExtUtils::CBuilder> has been upgraded from version 0.280216 to 0.280217.
+
+=item *
+
+L<ExtUtils::Install> was moved from F<dist> to F<cpan>.
+
+=item *
+
+L<ExtUtils::Manifest> has been upgraded from version 1.64 to 1.65.
+It was also moved from F<dist> to F<cpan>.
+
+=item *
+
+L<HTTP::Tiny> has been upgraded from version 0.043 to 0.047.
+
+=item *
+
+L<IPC::Open3> has been upgraded from version 1.17 to 1.18.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.021002 to 5.021003.
+
+=item *
+
+L<Opcode> has been upgraded from version 1.27 to 1.28.
+
+=item *
+
+L<perl5db.pl> has been upgraded from version 1.45 to 1.46.
+
+=item *
+
+L<perlfaq> has been upgraded from version 5.0150044 to 5.0150045.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.41 to 1.42.
+
+=item *
+
+L<Safe> has been upgraded from version 2.37 to 2.38.
+
+=item *
+
+L<Socket> has been upgraded from version 2.014 to 2.015.
+
+=item *
+
+L<Sys::Hostname> has been upgraded from version 1.18 to 1.19
+
+=item *
+
+L<UNIVERSAL> has been upgraded from version 1.11 to 1.12.
+
+=back
+
+=head1 Documentation
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perlexperiment>
+
+=over 4
+
+=item *
+
+Added reference to L<feature>.
+
+=back
+
+=head3 L<perlguts>
+
+=over 4
+
+=item *
+
+Details on C level symbols and libperl.t added.
+
+=back
+
+=head3 L<perlhacktips>
+
+=over 4
+
+=item *
+
+Recommended replacements for tmpfile, atoi, strtol, and strtoul added.
+
+=back
+
+=head3 L<perlop>
+
+=over 4
+
+=item *
+
+ASCII v. EBCDIC clarifications added.
+
+=back
+
+=head3 L<perlsec>
+
+=over 4
+
+=item *
+
+Comments added on algorithmic complexity and tied hashes.
+
+=back
+
+=head3 L<perlvms>
+
+=over 4
+
+=item *
+
+Updated documentation on environment and shell interaction in VMS.
+
+=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<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
+
+(F) Something went horribly bad in hexadecimal float handling.
+
+=item *
+
+L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
+
+(F) You have configured Perl to use long doubles but
+the internals of the long double format are unknown,
+therefore the hexadecimal float output is impossible.
+
+=back
+
+=head3 New Warnings
+
+=over 4
+
+=item *
+
+L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
+
+(W overflow) The hexadecimal floating point has larger exponent
+than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
+
+(W overflow) The hexadecimal floating point has smaller exponent
+than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
+
+(W overflow) The hexadecimal floating point literal had more bits in
+the mantissa (the part between the 0x and the exponent, also known as
+the fraction or the significand) than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
+
+(W overflow) The hexadecimal floating point had internally more
+digits than could be output.  This can be caused by unsupported
+long double formats, or by 64-bit integers not being available
+(needed to retrieve the digits under some configurations).
+
+=back
+
+=head2 Changes to Existing Diagnostics
+
+=over 4
+
+=item *
+
+C<require> with no argument or undef used to warn about a Null filename; now
+it dies with C<Missing or undefined argument to require>.
+
+=back
+
+=head1 Configuration and Compilation
+
+=over 4
+
+=item *
+
+MurmurHash64A and MurmurHash64B can now be configured as the internal hash
+function.
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Android
+
+Build support has been improved for cross-compiling in general and for
+Android in particular.
+
+=item Solaris
+
+C<c99> options have been cleaned up, hints look for C<solstudio>
+as well as C<SUNWspro>, and support for native C<setenv> has been added.
+
+=item VMS
+
+C<finite>, C<finitel>, and C<isfinite> detection has been added to
+C<configure.com>, environment handling has had some minor changes, and
+a fix for legacy feature checking status.
+
+=item Windows
+
+C<%I64d> is now being used instead of C<%lld> for MinGW.
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item *
+
+Added L<perlapi/sync_locale>.
+Changing the program's locale should be avoided by XS code.  Nevertheless,
+certain non-Perl libraries called from XS, such as C<Gtk> do so.  When this
+happens, Perl needs to be told that the locale has changed.  Use this function
+to do so, before returning to Perl.
+
+=item *
+
+Added L<perlapi/grok_atou> as a safer replacement for atoi and strtol.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+Failing to compile C<use Foo> in an eval could leave a spurious
+C<BEGIN> subroutine definition, which would produce a "Subroutine
+BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
+block.  [perl #122107]
+
+=item *
+
+C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
+begin with an opening brace.  [perl #46947]
+
+=item *
+
+External libraries and Perl may have different ideas of what the locale is.
+This is problematic when parsing version strings if the locale's numeric
+separator has been changed.  Version parsing has been patched to ensure
+it handles the locales correctly.  [perl #121930]
+
+=item *
+
+A bug has been fixed where zero-length assertions and code blocks inside of a
+regex could cause C<pos> to see an incorrect value.  [perl #122460]
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.21.3 represents approximately 4 weeks of development since Perl 5.21.2
+and contains approximately 21,000 lines of changes across 250 files from 25
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 18,000 lines of changes to 160 .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 5.21.3:
+
+Aaron Crane, Abigail, Alberto Simões, Andy Dougherty, Brian Fraser, Chad
+Granum, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker,
+Daniel Dragan, David Mitchell, Father Chrysostomos, H.Merijn Brand, James E
+Keenan, Jan Dubois, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas
+Mai, Peter Martini, Rafael Garcia-Suarez, syber, Tony Cook, Vladimir Marek,
+Yves Orton.
+
+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
+https://rt.perl.org/ .  There may also be information at
+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
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 8ed52b7438..7af6a923b5 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,389 +2,383 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.21.3
+[ 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 v5.21.4
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.21.2 release and the 5.21.3
+This document describes differences between the 5.21.3 release and the 5.21.4
 release.
 
-If you are upgrading from an earlier release such as 5.21.1, first read
-L<perl5212delta>, which describes differences between 5.21.1 and 5.21.2.
-
-=head1 Core Enhancements
+If you are upgrading from an earlier release such as 5.21.2, first read
+L<perl5213delta>, which describes differences between 5.21.2 and 5.21.3.
 
-=head2 C<defined(@array = LIST)> is no longer fatal
+=head1 Notice
 
-In 5.21.1, C<defined(@array)> was made fatal.  This has been relaxed
-to not die if the argument is assigning to an array.
+XXX Any important notices here
 
-=head2 Floating point parsing has been improved
+=head1 Core Enhancements
 
-Parsing and printing of floating point values has been improved.
+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.
 
-As a completely new feature, hexadecimal floating point literals
-(like 0x1.23p-4)  are now supported, and they can be output with
-C<printf %a>.
+[ List each enhancement as a =head2 entry ]
 
 =head1 Security
 
-=head2 The L<Safe> module could allow outside packages to be replaced
+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.
 
-Critical bugfix: outside packages could be replaced.  L<Safe> has
-been patched to 2.38 to address this.
+[ List each security issue as a =head2 entry ]
 
 =head1 Incompatible Changes
 
-=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
+XXX For a release on a stable branch, this section aspires to be:
 
-Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
-is now a fatal error.  S<C<"use UNIVERSAL">> without any arguments is still
-allowed.
+    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.
 
-=head1 Modules and Pragmata
+[ List each incompatible change as a =head2 entry ]
 
-=head2 Updated Modules and Pragmata
+=head1 Deprecations
 
-=over 4
+XXX Any deprecated features, syntax, modules etc. should be listed here.
 
-=item *
-
-L<B::Debug> has been upgraded from version 1.19 to 1.21.
-
-=item *
+=head2 Module removals
 
-L<Config::Perl::V> has been upgraded from version 0.20 to 0.22.
+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<CPAN::Meta> has been upgraded from version 2.141520 to 2.142060.
+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.
 
-=item *
+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.
 
-L<CPAN::Meta::Requirements> has been upgraded from version 2.125 to 2.126.
+=over
 
-=item *
+=item XXX
 
-L<ExtUtils::CBuilder> was moved from F<dist> to F<cpan>.
+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<ExtUtils::CBuilder> has been upgraded from version 0.280216 to 0.280217.
+[ List each other deprecation as a =head2 entry ]
 
-=item *
+=head1 Performance Enhancements
 
-L<ExtUtils::Install> was moved from F<dist> to F<cpan>.
+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<ExtUtils::Manifest> has been upgraded from version 1.64 to 1.65.
-It was also moved from F<dist> to F<cpan>.
+=over 4
 
 =item *
 
-L<HTTP::Tiny> has been upgraded from version 0.043 to 0.047.
+XXX
 
-=item *
+=back
 
-L<IPC::Open3> has been upgraded from version 1.17 to 1.18.
+=head1 Modules and Pragmata
 
-=item *
+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.
 
-L<Module::CoreList> has been upgraded from version 5.021002 to 5.021003.
+[ Within each section, list entries as a =item entry ]
 
-=item *
+=head2 New Modules and Pragmata
 
-L<Opcode> has been upgraded from version 1.27 to 1.28.
+=over 4
 
 =item *
 
-L<perl5db.pl> has been upgraded from version 1.45 to 1.46.
-
-=item *
+XXX
 
-L<perlfaq> has been upgraded from version 5.0150044 to 5.0150045.
+=back
 
-=item *
+=head2 Updated Modules and Pragmata
 
-L<POSIX> has been upgraded from version 1.41 to 1.42.
+=over 4
 
 =item *
 
-L<Safe> has been upgraded from version 2.37 to 2.38.
-
-=item *
+L<XXX> has been upgraded from version A.xx to B.yy.
 
-L<Socket> has been upgraded from version 2.014 to 2.015.
+=back
 
-=item *
+=head2 Removed Modules and Pragmata
 
-L<Sys::Hostname> has been upgraded from version 1.18 to 1.19
+=over 4
 
 =item *
 
-L<UNIVERSAL> has been upgraded from version 1.11 to 1.12.
+XXX
 
 =back
 
 =head1 Documentation
 
-=head2 Changes to Existing Documentation
+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>.
 
-=head3 L<perlexperiment>
+=head2 New Documentation
 
-=over 4
+XXX Changes which create B<new> files in F<pod/> go here.
 
-=item *
+=head3 L<XXX>
 
-Added reference to L<feature>.
+XXX Description of the purpose of the new file here
 
-=back
+=head2 Changes to Existing Documentation
 
-=head3 L<perlguts>
+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.
+
+=head3 L<XXX>
 
 =over 4
 
 =item *
 
-Details on C level symbols and libperl.t added.
+XXX Description of the change here
 
 =back
 
-=head3 L<perlhacktips>
+=head1 Diagnostics
 
-=over 4
+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>.
 
-=item *
+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.
 
-Recommended replacements for tmpfile, atoi, strtol, and strtoul added.
+=head2 New Diagnostics
 
-=back
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
 
-=head3 L<perlop>
+=head3 New Errors
 
 =over 4
 
 =item *
 
-ASCII v. EBCDIC clarifications added.
+XXX L<message|perldiag/"message">
 
 =back
 
-=head3 L<perlsec>
+=head3 New Warnings
 
 =over 4
 
 =item *
 
-Comments added on algorithmic complexity and tied hashes.
+XXX L<message|perldiag/"message">
 
 =back
 
-=head3 L<perlvms>
+=head2 Changes to Existing Diagnostics
+
+XXX Changes (i.e. rewording) of diagnostic messages go here
 
 =over 4
 
 =item *
 
-Updated documentation on environment and shell interaction in VMS.
+XXX Describe change here
 
 =back
 
-=head1 Diagnostics
+=head1 Utility Changes
 
-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>.
+XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
+Most of these are built within the directory F<utils>.
 
-=head2 New Diagnostics
+[ 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. ]
 
-=head3 New Errors
+=head2 L<XXX>
 
 =over 4
 
 =item *
 
-L<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
-
-(F) Something went horribly bad in hexadecimal float handling.
-
-=item *
+XXX
 
-L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
+=back
 
-(F) You have configured Perl to use long doubles but
-the internals of the long double format are unknown,
-therefore the hexadecimal float output is impossible.
+=head1 Configuration and Compilation
 
-=back
+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 Warnings
+[ List changes as a =item entry ].
 
 =over 4
 
 =item *
 
-L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
+XXX
 
-(W overflow) The hexadecimal floating point has larger exponent
-than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
+=back
 
-(W overflow) The hexadecimal floating point has smaller exponent
-than the floating point supports.
+=head1 Testing
 
-=item *
+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.
 
-L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
+[ List each test improvement as a =item entry ]
 
-(W overflow) The hexadecimal floating point literal had more bits in
-the mantissa (the part between the 0x and the exponent, also known as
-the fraction or the significand) than the floating point supports.
+=over 4
 
 =item *
 
-L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
-
-(W overflow) The hexadecimal floating point had internally more
-digits than could be output.  This can be caused by unsupported
-long double formats, or by 64-bit integers not being available
-(needed to retrieve the digits under some configurations).
+XXX
 
 =back
 
-=head2 Changes to Existing Diagnostics
-
-=over 4
+=head1 Platform Support
 
-=item *
+XXX Any changes to platform support should be listed in the sections below.
 
-C<require> with no argument or undef used to warn about a Null filename; now
-it dies with C<Missing or undefined argument to require>.
+[ Within the sections, list each platform as a =item entry with specific
+changes as paragraphs below it. ]
 
-=back
+=head2 New Platforms
 
-=head1 Configuration and Compilation
+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
 
-MurmurHash64A and MurmurHash64B can now be configured as the internal hash
-function.
+XXX
 
 =back
 
-=head1 Platform Support
+=head2 Discontinued Platforms
 
-=head2 Platform-Specific Notes
+XXX List any platforms that this version of perl no longer compiles on.
 
 =over 4
 
-=item Android
+=item XXX-some-platform
 
-Build support has been improved for cross-compiling in general and for
-Android in particular.
+XXX
 
-=item Solaris
+=back
 
-C<c99> options have been cleaned up, hints look for C<solstudio>
-as well as C<SUNWspro>, and support for native C<setenv> has been added.
+=head2 Platform-Specific Notes
 
-=item VMS
+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.
 
-C<finite>, C<finitel>, and C<isfinite> detection has been added to
-C<configure.com>, environment handling has had some minor changes, and
-a fix for legacy feature checking status.
+=over 4
 
-=item Windows
+=item XXX-some-platform
 
-C<%I64d> is now being used instead of C<%lld> for MinGW.
+XXX
 
 =back
 
 =head1 Internal Changes
 
-=over 4
+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.
 
-=item *
+[ List each change as a =item entry ]
 
-Added L<perlapi/sync_locale>.
-Changing the program's locale should be avoided by XS code.  Nevertheless,
-certain non-Perl libraries called from XS, such as C<Gtk> do so.  When this
-happens, Perl needs to be told that the locale has changed.  Use this function
-to do so, before returning to Perl.
+=over 4
 
 =item *
 
-Added L<perlapi/grok_atou> as a safer replacement for atoi and strtol.
+XXX
 
 =back
 
 =head1 Selected Bug Fixes
 
+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>.
+
+[ List each fix as a =item entry ]
+
 =over 4
 
 =item *
 
-Failing to compile C<use Foo> in an eval could leave a spurious
-C<BEGIN> subroutine definition, which would produce a "Subroutine
-BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
-block.  [perl #122107]
+XXX
 
-=item *
+=back
 
-C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
-begin with an opening brace.  [perl #46947]
+=head1 Known Problems
 
-=item *
+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.
 
-External libraries and Perl may have different ideas of what the locale is.
-This is problematic when parsing version strings if the locale's numeric
-separator has been changed.  Version parsing has been patched to ensure
-it handles the locales correctly.  [perl #121930]
+[ List each fix as a =item entry ]
+
+=over 4
 
 =item *
 
-A bug has been fixed where zero-length assertions and code blocks inside of a
-regex could cause C<pos> to see an incorrect value.  [perl #122460]
+XXX
 
 =back
 
-=head1 Acknowledgements
+=head1 Errata From Previous Releases
 
-Perl 5.21.3 represents approximately 4 weeks of development since Perl 5.21.2
-and contains approximately 21,000 lines of changes across 250 files from 25
-authors.
+=over 4
+
+=item *
 
-Excluding auto-generated files, documentation and release tools, there were
-approximately 18,000 lines of changes to 160 .pm, .t, .c and .h files.
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
 
-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 5.21.3:
+=back
+
+=head1 Obituary
 
-Aaron Crane, Abigail, Alberto Simões, Andy Dougherty, Brian Fraser, Chad
-Granum, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker,
-Daniel Dragan, David Mitchell, Father Chrysostomos, H.Merijn Brand, James E
-Keenan, Jan Dubois, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas
-Mai, Peter Martini, Rafael Garcia-Suarez, syber, Tony Cook, Vladimir Marek,
-Yves Orton.
+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 v5.21.3..HEAD
 
 =head1 Reporting Bugs
 
diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template
index 514945866f..b665af8c99 100644
--- a/vms/descrip_mms.template
+++ b/vms/descrip_mms.template
@@ -307,7 +307,7 @@ utils : $(utils1) $(utils2) $(utils3) $(utils4) $(utils5)
 extra.pods : miniperl
 	@ @extra_pods.com
 
-PERLDELTA_CURRENT = [.pod]perl5213delta.pod
+PERLDELTA_CURRENT = [.pod]perl5214delta.pod
 
 $(PERLDELTA_CURRENT) : [.pod]perldelta.pod
 	Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT)
diff --git a/win32/Makefile b/win32/Makefile
index 27d0d0514e..85943edd08 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -1155,7 +1155,7 @@ utils: $(PERLEXE) ..\utils\Makefile
 	copy ..\README.tw       ..\pod\perltw.pod
 	copy ..\README.vos      ..\pod\perlvos.pod
 	copy ..\README.win32    ..\pod\perlwin32.pod
-	copy ..\pod\perldelta.pod ..\pod\perl5213delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5214delta.pod
 	cd ..\win32
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
@@ -1250,7 +1250,7 @@ distclean: realclean
 	-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
 	-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
 	-cd $(PODDIR) && del /f *.html *.bat roffitall \
-	    perl5213delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5214delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \
 	    perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
 	    perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
diff --git a/win32/makefile.mk b/win32/makefile.mk
index 2f3ad01189..a6734efc48 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -1349,7 +1349,7 @@ utils: $(PERLEXE) ..\utils\Makefile
 	copy ..\README.tw       ..\pod\perltw.pod
 	copy ..\README.vos      ..\pod\perlvos.pod
 	copy ..\README.win32    ..\pod\perlwin32.pod
-	copy ..\pod\perldelta.pod ..\pod\perl5213delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5214delta.pod
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1443,7 +1443,7 @@ distclean: realclean
 	-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
 	-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
 	-cd $(PODDIR) && del /f *.html *.bat roffitall \
-	    perl5213delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5214delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \
 	    perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
 	    perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
diff --git a/win32/pod.mak b/win32/pod.mak
index 810a5f7256..4ed453b0cf 100644
--- a/win32/pod.mak
+++ b/win32/pod.mak
@@ -40,6 +40,7 @@ POD = perl.pod	\
 	perl5211delta.pod	\
 	perl5212delta.pod	\
 	perl5213delta.pod	\
+	perl5214delta.pod	\
 	perl561delta.pod	\
 	perl56delta.pod	\
 	perl581delta.pod	\
@@ -173,6 +174,7 @@ MAN = perl.man	\
 	perl5211delta.man	\
 	perl5212delta.man	\
 	perl5213delta.man	\
+	perl5214delta.man	\
 	perl561delta.man	\
 	perl56delta.man	\
 	perl581delta.man	\
@@ -306,6 +308,7 @@ HTML = perl.html	\
 	perl5211delta.html	\
 	perl5212delta.html	\
 	perl5213delta.html	\
+	perl5214delta.html	\
 	perl561delta.html	\
 	perl56delta.html	\
 	perl581delta.html	\
@@ -439,6 +442,7 @@ TEX = perl.tex	\
 	perl5211delta.tex	\
 	perl5212delta.tex	\
 	perl5213delta.tex	\
+	perl5214delta.tex	\
 	perl561delta.tex	\
 	perl56delta.tex	\
 	perl581delta.tex	\