to true your enviornment when testing.
-=head2 In @INC, move ARCHLIB and PRIVLIB after the current version's site_perl and vendor_perl.
+=head2 @INC reorganization
+
+In @INC, ARCHLIB and PRIVLIB now occur after after the current version's
+site_perl and vendor_perl.
=head2 Switch statement changes
C<length undef> now returns undef.
+=item *
+
+Unsupported private C API functions are now declared "static" to prevent
+leakage to Perl's public API.
+
+=item *
+
+To support the bootstrapping process, F<miniperl> no longer builds with
+UTF-8 support in the regexp engine.
+
+This allows a build to complete with PERL_UNICODE set and a UTF-8 locale.
+Without this there's a bootstrapping problem, as miniperl can't load the UTF-8
+components of the regexp engine, because they're not yet built.
+
+=item *
+
+F<miniperl>'s @INC is now restricted to just -I..., the split of $ENV{PERL5LIB}, and "."
+
+=item *
+
+A space or a newline is now required after a C<"#line XXX"> directive.
+
+=item *
+
+Tied filehandles now have an additional method EOF which provides the EOF type
+
+=item *
+
+To better match all other flow control statements, C<foreach> may no longer be used as an attribute.
+
=back
=head1 Core Enhancements
See the documentation for C<ExtUtils::MakeMaker> or C<Module::Build> for more
on how to specify C<configure_requires> when creating a distribution for CPAN.
-=head2 The C<each> function can now operate on arrays
+=head2 C<each> is now more flexible
+
+The C<each> function can now operate on arrays.
+
+=head2 Y2038 compliance
+
+Perl's core time-related functions are now Y2038 compliant. (With 29
+years to spare!)
+
+=head2 C<$,> flexibility
-=head2 Perl's core time-related functions are now Y2038 compliand
+The variable C<$,> may now be tied.
-=head2 The variable C<$,> may now be tied
+=head2 // in where clauses
-=head2 // now behaves like || in when clauses
+// now behaves like || in when clauses
-=head2 You can now set C<-W> from the C<PERL5OPT> environment varialbe
+=head2 Enabling warnings from your shell environment
+
+You can now set C<-W> from the C<PERL5OPT> environment variable
+
+=head2 C<delete local>
+
+C<delete local> now allows you to locally delete a hash entry.
+
+=head2 New support for Abstract namespace sockets
+
+Abstract namespace sockets are Linux-specific socket type that live in
+AF_UNIX family, slightly abusing it to be able to use arbitrary
+character arrays as addresses: They start with nul byte and are not
+terminated by nul byte, but with the length passed to the socket()
+system call.
=head1 Modules and Pragmata
+=head2 Dual-lifed modules moved
+
+Dual-lifed modules maintained primarily in the Perl core now live in dist/.
+Dual-lifed modules maintained primarily on CPAN now live in cpan/
+
+In previous releases of Perl, it was customary to enumerate all module
+changes in this section of the C<perldelta> file. From 5.11.0 forward
+only notable updates (such as new or deprecated modules ) will be
+listed in this section. For a complete reference to the versions of
+modules shipped in a given release of perl, please see L<Module::CoreList>.
+
=head2 New Modules and Pragmata
=over 4
See L</"The C<overloading> pragma"> above.
-=item C<attributes>
-
-Upgraded from version 0.08 to 0.09.
-
=item C<attrs>
The C<attrs> pragma has been removed. It had been marked as deprecated since
5.6.0.
-=item C<base>
-
-Upgraded from version 2.13 to 2.14. See L<parent> for a replacement.
-
-=item C<bigint>
-
-Upgraded from version 0.22 to 0.23.
-
-=item C<bignum>
-
-Upgraded from version 0.22 to 0.23.
-
-=item C<bigrat>
-
-Upgraded from version 0.22 to 0.23.
-
=item C<charnames>
-Upgraded from version 1.06 to 1.07.
-
The Unicode F<NameAliases.txt> database file has been added. This has the
effect of adding some extra C<\N> character names that formerly wouldn't
have been recognised; for example, C<"\N{LATIN CAPITAL LETTER GHA}">.
-=item C<constant>
-
-Upgraded from version 1.13 to 1.19. Some code has been shifted from run time to
-compile time, and the amount of MRO cache flushing has been minimised.
-
=item C<feature>
The meaning of the C<:5.10> and C<:5.10.X> feature bundles has
have identical effect. This is a change to the behaviour documented for
5.10.0.
-=item C<fields>
-
-Upgraded from version 2.13 to 2.14 (this was just a version bump; there
-were no functional changes).
-
-=item C<lib>
-
-Upgraded from version 0.5565 to 0.62.
+=item C<mro>
-=item C<open>
+Upgraded from version 1.00 to 1.01. Performance for single inheritance is 40%
+faster - see L</"Performance Enhancements"> below.
-Upgraded from version 1.06 to 1.07.
-
-=item C<overload>
-
-Upgraded from version 1.06 to 1.07.
-
-=item C<overloading>
-
-See L</"The C<overloading> pragma"> above.
-
-=item C<version>
-
-Upgraded from version 0.74 to 0.77.
+C<mro> is now implemented as an XS extension. The documented interface has not
+changed. Code relying on the implementation detail that some C<mro::>
+methods happened to be available at all times gets to "keep both pieces".
=back
=over 4
-=item C<Archive::Extract>
-
-Upgraded from version 0.24 to 0.34.
-
-=item C<Archive::Tar>
-
-Upgraded from version 1.38 to 1.52.
-
-=item C<Attribute::Handlers>
-
-Upgraded from version 0.79 to 0.85.
-
-=item C<AutoLoader>
-
-Upgraded from version 5.63 to 5.68.
-
-=item C<AutoSplit>
-
-Upgraded from version 1.05 to 1.06.
-
-=item C<B>
-
-Upgraded from version 1.17 to 1.22.
-
-=item C<B::Debug>
-
-Upgraded from version 1.05 to 1.11.
-
-=item C<B::Deparse>
-
-Upgraded from version 0.83 to 0.89.
-
-=item C<B::Lint>
-
-Upgraded from version 1.09 to 1.11.
-
-=item C<B::Xref>
-
-Upgraded from version 1.01 to 1.02.
-
-=item C<Benchmark>
-
-Upgraded from version 1.10 to 1.11.
-
-=item C<Carp>
-
-Upgraded from version 1.08 to 1.11.
-
-L<Carp> now includes all the necessary code to function. Previously, it
-used to be a lightweight placeholder that loaded the actual code from
-C<Carp::Heavy> on demand. C<Carp::Heavy> is now a simple, empty module
-kept for backwards compatibility for programs that used to pre-load it.
-
-=item C<CGI>
-
-Upgraded from version 3.29 to 3.43.
-(also includes the "default_value for popup_menu()" fix from 3.45).
-
-=item C<Compress::Zlib>
-
-Upgraded from version 2.008 to 2.020.
-
-=item C<CPAN>
-
-Upgraded from version 1.9205 to 1.9402. C<CPAN::FTP> has a local fix to
-stop it being too verbose on download failure.
-
-=item C<CPANPLUS>
-
-Upgraded from version 0.84 to 0.88.
-
-=item C<CPANPLUS::Dist::Build>
-
-Upgraded from version 0.06_02 to 0.36.
-
-=item C<Cwd>
-
-Upgraded from version 3.25_01 to 3.30.
-
-=item C<Data::Dumper>
-
-Upgraded from version 2.121_14 to 2.124.
-
-=item C<DB>
-
-Upgraded from version 1.01 to 1.02.
-
-=item C<DB_File>
-
-Upgraded from version 1.816_1 to 1.820.
-
-=item C<Devel::PPPort>
-
-Upgraded from version 3.13 to 3.19.
-
-=item C<Digest::MD5>
-
-Upgraded from version 2.36_01 to 2.39.
-
-=item C<Digest::SHA>
-
-Upgraded from version 5.45 to 5.47.
-
-=item C<DirHandle>
-
-Upgraded from version 1.01 to 1.03.
-
-=item C<Dumpvalue>
-
-Upgraded from version 1.12 to 1.13.
-
-=item C<DynaLoader>
-
-Upgraded from version 1.08 to 1.10.
-
-=item C<Encode>
-
-Upgraded from version 2.23 to 2.35.
-
-=item C<Errno>
-
-Upgraded from version 1.10 to 1.11.
-
-=item C<Exporter>
-
-Upgraded from version 5.62 to 5.63.
-
-=item C<ExtUtils::CBuilder>
-
-Upgraded from version 0.21 to 0.2602.
-
-=item C<ExtUtils::Command>
-
-Upgraded from version 1.13 to 1.16.
-
-=item C<ExtUtils::Constant>
-
-Upgraded from 0.20 to 0.22. (Note that neither of these versions are
-available on CPAN.)
-
-=item C<ExtUtils::Embed>
-
-Upgraded from version 1.27 to 1.28.
-
-=item C<ExtUtils::Install>
-
-Upgraded from version 1.44 to 1.54.
-
=item C<ExtUtils::MakeMaker>
Upgraded from version 6.42 to 6.55_02.
Note that C<ExtUtils::MakeMaker::bytes> and C<ExtUtils::MakeMaker::vmsish>
have been removed from this distribution.
-=item C<ExtUtils::Manifest>
-
-Upgraded from version 1.51_01 to 1.56.
-
-=item C<ExtUtils::ParseXS>
-
-Upgraded from version 2.18_02 to 2.2002.
-
-=item C<Fatal>
-
-Upgraded from version 1.05 to 2.06_01. See also the new pragma C<autodie>.
-
-=item C<File::Basename>
-
-Upgraded from version 2.76 to 2.77.
-
-=item C<File::Compare>
-
-Upgraded from version 1.1005 to 1.1006.
-
-=item C<File::Copy>
-
-Upgraded from version 2.11 to 2.16.
-
-File::Copy now always return 0 (not "") on failure.
-
-FIXME - describe C<cp>
-
-=item C<File::Fetch>
-
-Upgraded from version 0.14 to 0.20.
-
-=item C<File::Find>
-
-Upgraded from version 1.12 to 1.14.
-
-=item C<File::Path>
-
-Upgraded from version 2.04 to 2.07_03.
-
-=item C<File::Spec>
-
-Upgraded from version 3.2501 to 3.30.
-
-=item C<File::stat>
-
-Upgraded from version 1.00 to 1.01.
-
-Added -X overloading, -M, -C and -A.
-
-=item C<File::Temp>
-
-Upgraded from version 0.18 to 0.22.
-
-=item C<FileCache>
-
-Upgraded from version 1.07 to 1.08.
-
-=item C<FileHandle>
-
-Upgraded from version 2.01 to 2.02.
-
-=item C<Filter::Simple>
-
-Upgraded from version 0.82 to 0.84.
-
-=item C<Filter::Util::Call>
-
-Upgraded from version 1.07 to 1.08.
-
-=item C<FindBin>
-
-Upgraded from version 1.49 to 1.50.
-
-=item C<GDBM_File>
-
-Upgraded from version 1.08 to 1.09.
-
-=item C<Getopt::Long>
-
-Upgraded from version 2.37 to 2.38.
-
-=item C<Hash::Util::FieldHash>
-
-Upgraded from version 1.03 to 1.04. This fixes a memory leak.
-
-=item C<I18N::Collate>
-
-Upgraded from version 1.00 to 1.01.
-
-=item C<IO>
-
-Upgraded from version 1.23_01 to 1.25.
-
-This makes non-blocking mode work on Windows in C<IO::Socket::INET>
-[CPAN #43573].
-
-=item C<IO::Compress::*>
-
-Upgraded from version 2.008 to 2.020.
-
-=item C<IO::Dir>
-
-Upgraded from version 1.06 to 1.07.
-
-=item C<IO::Handle>
-
-Upgraded from version 1.27 to 1.28.
-
-=item C<IO::Socket>
-
-Upgraded from version 1.30_01 to 1.31.
-
-=item C<IO::Zlib>
-
-Upgraded from version 1.07 to 1.09.
-
-=item C<IPC::Cmd>
-
-Upgraded from version 0.40_1 to 0.46.
-
-=item C<IPC::Open3>
-
-Upgraded from version 1.02 to 1.04.
-
-=item C<IPC::SysV>
-
-Upgraded from version 1.05 to 2.01.
-
-=item C<lib>
-
-Upgraded from version 0.5565 to 0.62.
-
-=item C<List::Util>
-
-Upgraded from version 1.19 to 1.21.
-
-=item C<Locale::MakeText>
-
-Upgraded from version 1.12 to 1.13.
-
-=item C<Log::Message>
-
-Upgraded from version 0.01 to 0.02.
-
-=item C<Math::BigFloat>
-
-Upgraded from version 1.59 to 1.60.
-
-=item C<Math::BigInt>
-
-Upgraded from version 1.88 to 1.89.
-
-=item C<Math::BigInt::FastCalc>
-
-Upgraded from version 0.16 to 0.19.
-
-=item C<Math::BigRat>
-
-Upgraded from version 0.21 to 0.22.
-
-=item C<Math::Complex>
-
-Upgraded from version 1.37 to 1.56.
-
-=item C<Math::Trig>
-
-Upgraded from version 1.04 to 1.20.
-
-=item C<Memoize>
-
-Upgraded from version 1.01_02 to 1.01_03 (just a minor documentation
-change).
-
-=item C<Module::Build>
-
-Upgraded from version 0.2808_01 to 0.34_02.
-
-=item C<Module::CoreList>
-
-Upgraded from version 2.13 to 2.18. This release no longer contains the
-C<%Module::CoreList::patchlevel> hash.
-
-=item C<Module::Load>
-
-Upgraded from version 0.12 to 0.16.
-
-=item C<Module::Load::Conditional>
-
-Upgraded from version 0.22 to 0.30.
-
-=item C<Module::Loaded>
-
-Upgraded from version 0.01 to 0.02.
-
-=item C<Module::Pluggable>
-
-Upgraded from version 3.6 to 3.9.
-
-=item C<NDBM_File>
-
-Upgraded from version 1.07 to 1.08.
-
-=item C<Net::Ping>
-
-Upgraded from version 2.33 to 2.36.
-
-=item C<NEXT>
-
-Upgraded from version 0.60_01 to 0.64.
-
-=item C<Object::Accessor>
-
-Upgraded from version 0.32 to 0.34.
-
-=item C<OS2::REXX>
-
-Upgraded from version 1.03 to 1.04.
-
-=item C<Package::Constants>
-
-Upgraded from version 0.01 to 0.02.
-
-=item C<PerlIO>
-
-Upgraded from version 1.04 to 1.06.
-
-=item C<PerlIO::via>
-
-Upgraded from version 0.04 to 0.07.
-
-=item C<Pod::Man>
-
-Upgraded from version 2.16 to 2.22.
-
-=item C<Pod::Parser>
-
-Upgraded from version 1.35 to 1.37.
-
-=item Pod::Perldoc
-
-Upgrade from version 3.14_02 to 3.15.
-
-=item C<Pod::Simple>
-
-Upgraded from version 3.05 to 3.07.
-
-=item C<Pod::Text>
-
-Upgraded from version 3.08 to 3.13.
-
-=item C<POSIX>
-
-Upgraded from version 1.13 to 1.17.
-
-=item C<Safe>
-
-Upgraded from 2.12 to 2.18.
-
-=item C<Scalar::Util>
-
-Upgraded from version 1.19 to 1.21.
-
-=item C<SelectSaver>
-
-Upgraded from 1.01 to 1.02.
-
-=item C<SelfLoader>
-
-Upgraded from 1.11 to 1.17.
-
-=item C<Socket>
-
-Upgraded from 1.80 to 1.84.
-
-As of 1.84, C<Socket> can now handle abstract namespace sockets on Linux.
-(see unix(7)).
-
-=item C<Storable>
-
-Upgraded from 2.18 to 2.20.
-
-=item C<Switch>
-
-Upgraded from version 2.13 to 2.14. Please see L</Deprecations>.
-
-=item C<Symbol>
-
-Upgraded from version 1.06 to 1.07.
-
-=item C<Sys::Syslog>
-
-Upgraded from version 0.22 to 0.27.
-
-=item C<Term::ANSIColor>
-
-Upgraded from version 1.12 to 2.01.
-
-=item C<Term::ReadLine>
-
-Upgraded from version 1.03 to 1.04.
-
-=item C<Term::UI>
-
-Upgraded from version 0.18 to 0.20.
-
=item C<Test::Harness>
Upgraded from version 2.64 to 3.17.
removed. If you still need this, then they are available in the
(unmaintained) C<Test-Harness-Straps> distribution on CPAN.
-=item C<Test::Simple>
-
-Upgraded from version 0.72 to 0.92.
-
-=item C<Text::ParseWords>
-
-Upgraded from version 3.26 to 3.27.
-
-=item C<Text::Tabs>
-
-Upgraded from version 2007.1117 to 2009.0305.
-
-=item C<Text::Wrap>
-
-Upgraded from version 2006.1117 to 2009.0305.
-
-=item C<Thread::Queue>
-
-Upgraded from version 2.00 to 2.11.
-
-=item C<Thread::Semaphore>
-
-Upgraded from version 2.01 to 2.09.
-
-=item C<threads>
-
-Upgraded from version 1.67 to 1.73.
-
-=item C<threads::shared>
-
-Upgraded from version 1.14 to 1.29.
-
-=item C<Tie::RefHash>
-
-Upgraded from version 1.37 to 1.38.
-
-=item C<Tie::StdHandle>
-
-This has documentation changes, and has been assigned a version for the
-first time: version 4.2.
-
-=item C<Time::HiRes>
-
-Upgraded from version 1.9711 to 1.9719.
-
-=item C<Time::Local>
-
-Upgraded from version 1.18 to 1.1901.
-
-=item C<Time::Piece>
-
-Upgraded from version 1.12 to 1.15.
-
-=item C<Unicode::Normalize>
-
-Upgraded from version 1.02 to 1.03.
-
-=item C<Unicode::UCD>
-
-Upgraded from version 0.25 to 0.27.
-
-C<charinfo()> now works on Unified CJK code points added to later versions
-of Unicode.
-
-C<casefold()> has new fields returned to provide both a simpler interface
-and previously missing information. The old fields are retained for
-backwards compatibility. Information about Turkic-specific code points is
-now returned.
-
-The documentation has been corrected and expanded.
-
=item C<UNIVERSAL>
Upgraded from version 1.04 to 1.05.
-C<UNIVERSAL->import()> is now deprecated.
-
-=item C<Win32>
-
-Upgraded from version 0.34 to 0.39.
-
-=item C<Win32API::File>
-
-Upgraded from version 0.1001_01 to 0.1101.
-
-=item C<XSLoader>
-
-Upgraded from version 0.08 to 0.10.
+C<< UNIVERSAL-E<gt>import() >> is now deprecated.
=back
This describes how to access the perl source using the I<git> version
control system.
-=item L<perlthanks>
-
-This describes the new F<perlthanks> utility.
-
=back
=head1 Changes to Existing Documentation
L<perlapi>, L<perlintern>, L<perlmodlib> and L<perltoc> are now all
generated at build time, rather than being shipped as part of the release.
-=head2 Documented -X overloading.
+=over
+
+=item *
+
+Documented -X overloading.
+
+=item *
+
+Documented that C<when()> treats specially most of the filetest operators
+
+=item *
+
+Documented when as a syntax modifier
-=head2 Documented that C<when()> treats specially most of the filetest operators
+=item *
-=head2 Documented when as a syntax modifier
+Eliminated "Old Perl threads tutorial", which describes 5005 threads.
-=head2 Eliminated "Old Perl threads tutorial", which describes 5005 threads.
+F<pod/perlthrtut.pod> is the same material reworked for ithreads.
-pod/perlthrtut.pod is the same material reworked for ithreads.
+=item *
-=head2 Correct previous documentation: v-strings are not deprecated
+Correct previous documentation: v-strings are not deprecated
With version objects, we need them to use MODULE VERSION syntax. This
patch removes the deprecation note.
+=item *
+
+Added security contact information to L<perlsec>
+
+=back
+
=head1 Performance Enhancements
+
=over 4
=item *
=item *
The implementation of C<C3> Method Resolution Order has been optimised -
-linearisation for classes with single inheritance is 40% faster. Performance
+linearisation for classes with single inheritance is 40% faster. Performance
for multiple inheritance is unchanged.
=item *
C<known_extensions>, C<nonxs_ext> and C<static_ext> have not changed, and
still use C</>. Hence this change will not have any affect once perl is
installed. C<Safe> has been split out from being part of C<Opcode>, and
-C<mro> is now an extension in its own right.
+C<mro> is now an extension in its own right.
Nearly all dual-life modules have been moved from F<lib> to F<ext>, and will
now appear as known C<nonxs_ext>. This will made no difference to the
Removed F<libbsd> for AIX 5L and 6.1. Only C<flock()> was used from F<libbsd>.
Removed F<libgdbm> for AIX 5L and 6.1. The F<libgdbm> is delivered as an
-optional package with the AIX Toolbox. Unfortunately the 64 bit version
+optional package with the AIX Toolbox. Unfortunately the 64 bit version
is broken.
Hints changes mean that AIX 4.2 should work again.
Patches from the Haiku maintainers have been merged in. Perl should now
build on Haiku.
+=item MachTen
+
+Support for Tenon Intersystems MachTen Unix layer for MacOS Classic was
+removed in Perl 5.11.0
+
=item MiNT
Support for Atari MiNT was removed in Perl 5.11.0.
=item *
-C<-I> on shebang line now adds directories in front of @INC.
+C<-I> on shebang line now adds directories in front of @INC
as documented, and as does C<-I> when specified on the command-line.
-(Renée Bäcker)
=item *
=item *
-C<< $object->isa('Foo') >> would report false if the package C<Foo> didn't
+C<< $object-E<gt>isa('Foo') >> would report false if the package C<Foo> didn't
exist, even if the object's C<@ISA> contained C<Foo>.
=item *
A 5.10.0 optimisation to clear the temporary stack within the implicit
loop of C<s///ge> has been reverted, as it turned out to be the cause of
-obscure bugs in seemingly unrelated parts of the interpreter [commit
+obscure bugs in seemingly unrelated parts of the interpreter [commit
ef0d4e17921ee3de].
=item *
Assertion rx->sublen >= (s - rx->subbeg) + i failed
+=item *
+
+Previously missing files from Unicode 5.1 Character Database are now included.
+
+=item *
+
+C<TMPDIR> is now honored when opening an anonymous temporary file
+
=back
=head1 New or Changed Diagnostics
=item *
+TODO: C<SVt_RV> is gone. RVs are now stored in IVs
+
+=item *
+
+TODO: REGEXPs are first class
+
+=item *
+
+TODO: OOK is reworked, such that an OOKed scalar is PV not PVIV
+
+=item *
+
The J.R.R. Tolkien quotes at the head of C source file have been checked and
proper citations added, thanks to a patch from Tom Christiansen.
=item *
+Smartmatch resolution tracing has been added as a new diagnostic. Use C<-DM> to
+enable it.
+
+
+=item *
+
+A new debugging flag C<-DB> now dumps subroutine definitions, leaving
+C<-Dx> for its original purpose of dumping syntax trees.
+
+=item *
+
Uses of C<Nullav>, C<Nullcv>, C<Nullhv>, C<Nullop>, C<Nullsv> etc have been
replaced by C<NULL> in the core code, and non-dual-life modules, as C<NULL>
is clearer to those unfamiliar with the core code.
Test the tied methods of C<Tie::Hash::NamedCapture>.
-=item t/op/reg_posixcc.t
+=item t/op/reg_posixcc.t
Check that POSIX character classes behave consistently.
=item *
+The following modules will be removed from the core distribution in a future
+release, and should be installed from CPAN instead. Distributions on CPAN
+which require these should add them to their prerequisites. The core versions
+of these modules warnings will issue a deprecation warning.
+
+=over
+
+=item *
+
+C<Class::ISA>
+
+=item *
+
+C<Pod::Plainer>
+
+=item *
+
+C<Shell>
+
+=back
+
+Currently support to install from CPAN without a I<force> is C<TODO> in CPAN
+and CPANPLUS. This will be addressed before 5.12.0 ships.
+
+=item *
+
C<suidperl> has been removed. It used to provide a mechanism to
emulate setuid permission bits on systems that don't support it properly.
=item *
-warn if ++ or -- are unable to change the value because it's beyond the limit of representation
+warn if ++ or -- are unable to change the value because it's beyond the limit of representation
This uses a new warnings category: "imprecision".
=item *
-Unintented interpolation of $\ in regex
+Unintended interpolation of $\ in regex
=item *
Amelioration of the error message "Unrecognized character %s in column %d"
-Changes the error message to "Unrecognized character %s; marked by <--
-HERE after %s<-- HERE near column %d". This should make it a little
+Changes the error message to "Unrecognized character %s; marked by E<lt>--
+HERE after %sE<lt>-- HERE near column %d". This should make it a little
simpler to spot and correct the suspicious character.
=item *
Explicitely point to $. when it causes an uninitialized warning for ranges in scalar context
+
+=item *
+
+Deprecated numerous Perl 4-era libraries:
+
+F<termcap.pl>, F<tainted.pl>, F<stat.pl>, F<shellwords.pl>, F<pwd.pl>,
+F<open3.pl>, F<open2.pl>, F<newgetopt.pl>, F<look.pl>, F<find.pl>,
+F<finddepth.pl>, F<importenv.pl>, F<hostname.pl>, F<getopts.pl>,
+F<getopt.pl>, F<getcwd.pl>, F<flush.pl>, F<fastcwd.pl>, F<exceptions.pl>,
+F<ctime.pl>, F<complete.pl>, F<cacheout.pl>, F<bigrat.pl>, F<bigint.pl>,
+F<bigfloat.pl>, F<assert.pl>, F<abbrev.pl>, F<dotsh.pl>, and
+F<timelocal.pl> are all now deprecated. Using them will incur a warning.
+
=back
=head1 Acknowledgements
=cut
-=head1 TODO
-
-The following changes are a filtered list of changes which weren't backported
-to 5.10.1. They were run through changelogger.bestpractical.com and triaged
-by a set of Perl 5 Porters. Changes to blead after 5945e41e have not yet
-been triaged or integrated.
-
-The following changes need to be
-
-1) deleted if they don't merit inclusion
-
- OR
-
-2) lightly copyedited and integrated into the perldelta above. Unfortunately, many of our
-commit messages are somewhat terse and require a bit more help to turn into something readable
-
-
-
-
-=head1 API
-
-=head2 Move the reg_stringify logic to Perl_sv_2pv_flags
-
-=head2 mg_copy ought to take an I32
-
-=head2 Perl_store_cop_label() isn't meant to be part of the public API.
-
-=head2 Perl_gv_fetchmethod{,_autoload,_flags} are actually never* called with a non-NULL stash.
-So change the parameter to NN.
-
-
-=head2 Promote Perl_setdefout() to the public API.
-
-=head2 Add get_cvs() as a shortcut for STR_WITH_LEN() and Perl_get_cvn_flags()
-
-=head2 In Perl_newCONSTSUB(), sv should not be NULL.
-
-=head2 GvUNIQUE* have been defined as 0 since 2005/06/30 - high time to remove them.
-
-=head2 invert and rename PERL_MEM_LOG_STDERR to PERL_MEM_LOG_NOIMPL
-
-Most users who want PERL_MEM_LOG want the default implementation,
-give it to them. Users providing their own implementation can
-obtain current behavior by adding -DPERL_MEM_LOG_NOIMPL.
-Frankly, the average user probably wants _ENV by default too.
-
-=head2 simplify PERL_MEM_LOG
-
-This combines multiple environment variable reads into 1,
-where it looks for values like "2mst"
--2 leading digits are atoi()d to get FD
--m memory logging please
--s sv logging also
--t timestamp those please.
-
-Combining these reduces overhead such that it seemed
-worthwhile to drop all the ifdefs. TBD whether this works
-in the environment that drove the original tradeoffs.
-
-If it isnt enough, Id be tempted by a global static ptr,
-and on 1st use, is read, seen 0, a lock is taken, and getenvar
-run to populate it, unlocked, proceed. This would remove
-iterative overheads.
-
-=head2 Add a parameter "destructing" to Gv_AMupdate()
-
-This boolean parameter indicates if the function has been called
-to update the overload magic table while looking up the DESTROY
-method. In this case, it's probably best to avoid croaking if
-those tables could not be updated (for example due to a method
-that could not be loaded.)
-
-=head2 Modify the return value of Gv_AMupdate to indicate a compilation error
-
-This way we'll restore most of the performance on object desctruction
-lost by the previous commit
-
-
-=head2 local $SIG{FOO} = sub {...}; sets signal handler to SIG_DFL
-
-Re: [perl #60360] [PATCH] UPDATED: local $SIG{FOO} = sub {...}; sets signal handler to SIG_DFL
-Message-ID: <20081112234504.GI2062@tytlal.topaz.cx>
-
-Updated patch to retain source compatibility.
-
-Plus using the correct PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS
-macro and running make regen.
-
-=head2 Respecting inc_version_list while processing PERL_VENDORLIB_STEM
-
-Respecting inc_version_list while processing PERL_VENDORLIB_STEM
-From: "Mandalemula, Rajesh" <Rajesh.Mandalemula@deshaw.com>
-
-=head2 Change PL_debug behaviour
-
-
-String eval lines are now saved whenever
-a subroutine is defined, even if the eval'd string has subsequent
-syntax errors. This allows the debugger to single step into these
-subroutines.
-
-
-=head2 Tied filehandles now have an additional method EOF which provides the EOF type
-
-=head2 Perl is now smarter about adding a -I dir to the beginning or end of @INC
-
-=head2 On scope end, delete localized array elements that should not exist anymore, so that the array recovers its previous length. Honour EXISTS and DELETE for tied arrays.
-
-=head2 When a glob is deleted, mark its sub as ANON.
-
-=head2 Require a space or a newline after a "#line XXX" directive
-
-=head2 Forbid using "foreach" as an attribute
-
-(like all other control flow statements)
-
-
-=head2 Unregister signal handlers before destroying my_perl
-
-If the signal handler runs after perl_destruct() has been called, it
-will get an invalid (or NULL) my_perl when it asks for the
-thread-specific interpreter struct. This patch resets the signal
-handler for any signal previously handled by PL_csighandlerp to SIG_DFL
-before calling perl_destruct().
-
-=head2 Perl_magic_clearsig() needs to remove magic, else delete $SIG{INT} returns undef
-
-Perl_magic_clearsig() needs to remove magic, else delete $SIG{INT} returns undef
-instead of the now-removed INT handler.
-
-=head2 [perl #66452] TMPDIR not honored when opening an anonymous temporary file
-
-[perl #66452] TMPDIR not honored when opening an anonymous temporary file
-
-=head2 The attached patch to perlio.c fixes the problem of errno getting set.
-
-While I am firmly in the school of "do not look at $! except immediately
-after a failure", I also agree that spuriously setting it is messy. But
-there is just no way of knowing where your errno might have been.
-
-The problem was that PerlIO_fast_gets() (and other nearby similar
-capability-checking PerlIO routines) set the errno (and it was being
-called a lot, from sv_gets()). I think setting the errno here was
-a mistake: checking for "can has FOO" should not set external state,
-such as the errno. The patch removes that errno trashing from all those
-routines.
-
-=head2 Trim all trailing / from "." in @INC when filling %INC
-
-This fixes bug #66942 : as a / was left in the directory name,
-$INC{"Foo.pm"} for a file loaded from the current directory
-was given the incorrect value "/Foo.pm".
-
-=head2 Don't enqueue pending signals during global destruction
-
-Global destruction is not signal-safe. PL_psig_pend may already
-be gone when the signal handler is called (with destruct_level > 0).
-NULL it before freeing it to prevent a race condition.
-
-=head2 Eliminate struct regexp_allocated and xpvio_allocated.
-
-Calculate memory allocation using regexp and XPVIO, and the offset of the first
-real structure member. This avoids tripping over alignment differences between
-X* and x*_allocated, because x*_allocated doesn't have a double in it.
-
-
-=head1 internals
-
-=head2 [perl #47047] Use of inherited AUTOLOAD for non-method is deprecated
-
-=head2 Remove the definitions of Null(), Nullch, Nullfp, Nullsv and PL_na when code is within the perl source tree
-
-=head2 Replace our assert-which-can-be-caught-by-eval with the real deal from the standard C library.
-
-=head2 Tweak Perl_sv_upgrade() so that references can upgrade to SVt_PV
-
-=head2 Eliminate prelen from struct regexp.
-
-=head2 Change Perl_av_iter_p() to return IV* rather than I32* (which means
-
-=head2 Reorder the external regexp flags to get RXf_PMf_STD_PMMOD into the
-
-lowest 4 bits (which saves a shift), and the "flags indicating special
-patterns" into contiguous bits. This makes everything a little tidier,
-and saves 88 bytes (woohoo!) of object file with -Os on x86 FreeBSD.
-
-
-=head2 Re-implement the SvOOK() hack to store the offset as a BER encoded number in the part of the PVX that is being released.
-(It will always
-fit, as chopping off 1 byte gives just enough space for recording a
-delta of up to 127). This allows SvOOK() to co-exist with SvIOK_on(),
-which means all the calls to SvOOK_off() [with the possibility of a
-call to sv_backoff()] in SvIOK_on() can be removed. This ought to make
-a lot of straight line code a little bit simpler.
-OOK()d scalars can now be SVt_PV, as the IVX isn't needed.
-
-=head2 Abolish wraplen from struct regexp. We're already storing it in SvCUR.
-
-=head2 Make Perl_pregcomp() use SvUTF8() of the pattern, rather than the flag bit in pmflags, to decide whether the pattern is UTF-8.
-
-=head2 Abolish RXf_UTF8. Store the UTF-8-ness of the pattern with SvUTF8().
-
-=head2 In struct regexp move the member paren_names to the IV union.
-
-=head2 Make REGEXP a type distinct from SV. (Much like AV, CV, GV, HV).
-
-=head2 Allow sv_setsv_flags() to copy SVt_REGEXP much like it copies SVt_FORMAT - the just string buffer.
-
-
-=head2 Correct a long-standing ithreads reference counting anonamly
-
-The reference count only needs "doubling" when the scalar is pushed onto
-PL_regex_padav for the second time.
-
-
-=head2 In PL_regexp_padav, store regexps via real references, rather than hiding them within IVs.
-
-We can do this now that they are real SV pointers.
-
-=head2 With regexps stored as real RVs, we can eliminate SvREPADTMP().
-
-=head2 REGEXPs are now stored directly in PL_regex_padav, rather than indirectly via RVs.
-
-=head2 Remove code that protected pp_qr against REGEXPs going away during global destruction whilst they were stored via true references in PL_regex_padav.
-
-=head2 Remove PM_GETRE_SAFE and PM_SETRE_SAFE as nothing uses them.
-
-=head2 Note the U8 sized space created by removing -P, and check that it is now an illegal command line flag.
-
-=head2 Pack the recycled pad offsets into an SV at PL_regex_pad[0].
-
-=head2 Re-order so that the !SvOK() case is last (which should be rare)
-
-=head2 Extend PUSHFORMAT() to take a second parameter to set retop, to save NULLing it and then reassigning.
-
-=head2 Split struct block_sub into struct block_sub and struct block_format.
-
-Split struct block_sub into struct block_sub and struct block_format.
-(CXt_SUB and CXt_FORMAT were using some comon members, but some members
-were only for one or the other.)
-
-=head2 Change the wantarray result from caller from IV to bool for the SCALAR/ARRAY case.
-
-This doesn't contradict the documentation, as there isn't any. Oops.
-
-
-=head2 Give G_VOID, G_SCALAR and G_ARRAY the same numeric values as OPf_WANT_VOID, OPf_WANT_SCALAR and OPf_WANT_LIST.
-
-
-=head2 Squeeze the context type down to 4 bits, and move the private flags to fit within the next 4 bits.
-
-
-=head2 In struct block change blku_type from U8 to U16, and the "spare" U8 to U16, with the lockstep changes in struct subst.
-Eliminate lval from
-struct block_sub, and instead store it in the U16 in struct block.
-
-
-=head2 In struct block_eval, eliminate old_in_eval and old_op_type by storing the data in blk_u16.
-
-
-=head2 The layout for struct block_loop under ithreads can be simplified.
-
-Instead of wedging the pad offset into a void* iterdata, and always
-storing PL_comppad even when it isn't used, instead do this:
-
-PAD *oldcomppad; /* Also used for the GV, if targoffset is 0 */
-/* This is also accesible via cx->blk_loop.my_op->op_targ */
-PADOFFSET targoffset;
-
-and store the GV pointer in oldcompad. Pointers to pointers seems
-cleaner. This also allows us to eliminate the flag bit CXp_PADVAR.
-
-
-=head2 In XS_PerlIO_get_layers() take advantage of the implementation of
-
-In XS_PerlIO_get_layers() take advantage of the implementation of
-PerlIO_get_layers(), by co-opting the new SVs it creates, rather than
-copying them.
-
-
-=head2 Micro-optimise the order of the context types. [Because I can :-)]
-
-=head2 [patch] optimize OP_IS_(FILETEST|SOCKET) macros
-
-=head2 Eliminate ck_lengthconst.
-
-=head2 Chainsaw DEBUG_S out, as suggested by Vincent Pit.
-
-=head2 Unsupported private API functions are now declared "static" to prevent leakage to the public API
-
-=head2 Perl_cv_ckproto() is not part of the public API, and not used anywhere. It has been removed
-
-=head2 Remove all the 5005threads specific mutex macros, which are now vestigial.
-
-=head2 Do not honor TMPDIR for anonymous temporary files when tainting
-
-Use a default of /tmp on Unixes when TMPDIR is unset or empty, or
-when creation of a temporary file in it fails
-
-=head2 Add a pluggable hook in op_free()
-
-
-
-
-