[perl5.git] / pod / perl5295delta.pod

=encoding utf8

=head1 NAME

perl5295delta - what is new for perl v5.29.5

=head1 DESCRIPTION

This document describes differences between the 5.29.4 release and the 5.29.5
release.

If you are upgrading from an earlier release such as 5.29.3, first read
L<perl5294delta>, which describes differences between 5.29.3 and 5.29.4.

=head1 Core Enhancements

=head2 C<-Drv> now means something on C<-DDEBUGGING> builds

Now, adding the verbose flag (C<-Dv>) to the C<-Dr> flag turns on all
possible regular expression debugging.

=head1 Performance Enhancements

=over 4

=item *

Regular expression pattern matching of things like C<qr/[^I<a>]/> is
significantly sped up, where I<a> is any ASCII character.  Which classes
will get this speed up is complicated and depends on the underlying bit
patterns of those characters, so differs between ASCII and EBCDIC
platforms, but all case pairs, like C<qr/[Gg]/> are included, as is
C<[^01]>.

=back

=head1 Modules and Pragmata

=head2 Updated Modules and Pragmata

=over 4

=item *

L<Data::Dumper> has been upgraded from version 2.172 to 2.173.

=item *

L<Errno> has been upgraded from version 1.29 to 1.30.

=item *

L<File::Spec> has been upgraded from version 3.75 to 3.76.

=item *

L<GDBM_File> has been upgraded from version 1.17 to 1.18.

=item *

L<Module::CoreList> has been upgraded from version 5.20181020 to 5.20181120.

=item *

L<NDBM_File> has been upgraded from version 1.14 to 1.15.

=item *

L<ODBM_File> has been upgraded from version 1.15 to 1.16.

=item *

L<re> has been upgraded from version 0.36 to 0.37.

=item *

L<SDBM_File> has been upgraded from version 1.14 to 1.15.

=back

=head1 Documentation

=head2 Changes to Existing Documentation

We have attempted to update the documentation to reflect the changes
listed in this document.  If you find any we have missed, send email
to L<perlbug@perl.org|mailto:perlbug@perl.org>.

Additionally, the following selected changes have been made:

=head3 L<perlfunc>

=over 4

=item *

The entry for L<perlfunc/-X> has been clarified to indicate that symbolic
links are followed for most tests.

=back

=head1 Configuration and Compilation

=over 4

=item *

Normally the thread-safe functions are used only on threaded builds.
It is now possible to force their use on unthreaded builds on systems
that have them available, by including the
C<-Accflags='-DUSE_THREAD_SAFE_LOCALE'> option to F<Configure>.

=back

=head1 Testing

Tests were added and changed to reflect the other additions and changes
in this release.

=head1 Platform Support

=head2 Platform-Specific Notes

=over 4

=item Mac OS X

Perl's build and testing process on Mac OS X for C<-Duseshrplib>
builds is now compatible with Mac OS X System Integrity Protection
(SIP).

SIP prevents binaries in F</bin> (and a few other places) being passed
the C<DYLD_LIBRARY_PATH> environment variable.  For our purposes this
prevents C<DYLD_LIBRARY_PATH> from being passed to the shell, which
prevents that variable being passed to the testing or build process,
so running C<perl> couldn't find F<libperl.dylib>.

To workaround that, the initial build of the F<perl> executable
expects to find F<libperl.dylib> in the build directory, and the
library path is then adjusted during installation to point to the
installed library.

[perl #126706]

=item Minix3

Some support for Minix3 has been re-added.

=back

=head1 Selected Bug Fixes

=over 4

=item *

L<SDBM_File> is now more robust with corrupt database files.  The
improvements do not make SDBM files suitable as an interchange format.
[perl #132147]

=item *

C<binmode($fh);> or C<binmode($fh, ':raw');> now properly removes the
C<:utf8> flag from the default C<:crlf> I/O layer on Win32.  [perl
#133604]

=item *

The experimental reference aliasing feature was misinterpreting array and
hash slice assignment as being localised, e.g.

    \(@a[3,5,7]) = \(....);

was being interpreted as:

    local \(@a[3,5,7]) = \(....);

[perl #133538]

=back

=head1 Acknowledgements

Perl 5.29.5 represents approximately 4 weeks of development since Perl
5.29.4 and contains approximately 4,000 lines of changes across 110 files
from 18 authors.

Excluding auto-generated files, documentation and release tools, there were
approximately 2,600 lines of changes to 51 .pm, .t, .c and .h files.

Perl continues to flourish into its fourth decade thanks to a vibrant
community of users and developers. The following people are known to have
contributed the improvements that became Perl 5.29.5:

Aaron Crane, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Dan
Dedrick, David Cantrell, David Mitchell, Dominic Hargreaves, H.Merijn Brand,
James Clarke, James E Keenan, Karen Etheridge, Karl Williamson, Niko Tyni,
Pali, Phil Pearl (Lobbes), Sawyer X, Tomasz Konojacki, 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 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 see
L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
for details of how to report the issue.

=head1 Give Thanks

If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
you can do so by running the C<perlthanks> program:

    perlthanks

This will send an email to the Perl 5 Porters list with your show of thanks.

=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
Commit	Line	Data
4380f76d KE	1	=encoding utf8
	2
	3	=head1 NAME
	4
	5	perl5295delta - what is new for perl v5.29.5
	6
	7	=head1 DESCRIPTION
	8
	9	This document describes differences between the 5.29.4 release and the 5.29.5
	10	release.
	11
	12	If you are upgrading from an earlier release such as 5.29.3, first read
	13	L<perl5294delta>, which describes differences between 5.29.3 and 5.29.4.
	14
	15	=head1 Core Enhancements
	16
	17	=head2 C<-Drv> now means something on C<-DDEBUGGING> builds
	18
	19	Now, adding the verbose flag (C<-Dv>) to the C<-Dr> flag turns on all
	20	possible regular expression debugging.
	21
	22	=head1 Performance Enhancements
	23
	24	=over 4
	25
	26	=item *
	27
	28	Regular expression pattern matching of things like C<qr/[^I<a>]/> is
	29	significantly sped up, where I<a> is any ASCII character. Which classes
	30	will get this speed up is complicated and depends on the underlying bit
	31	patterns of those characters, so differs between ASCII and EBCDIC
	32	platforms, but all case pairs, like C<qr/[Gg]/> are included, as is
	33	C<[^01]>.
	34
	35	=back
	36
	37	=head1 Modules and Pragmata
	38
	39	=head2 Updated Modules and Pragmata
	40
	41	=over 4
	42
	43	=item *
	44
	45	L<Data::Dumper> has been upgraded from version 2.172 to 2.173.
	46
	47	=item *
	48
	49	L<Errno> has been upgraded from version 1.29 to 1.30.
	50
	51	=item *
	52
	53	L<File::Spec> has been upgraded from version 3.75 to 3.76.
	54
	55	=item *
	56
	57	L<GDBM_File> has been upgraded from version 1.17 to 1.18.
	58
	59	=item *
	60
	61	L<Module::CoreList> has been upgraded from version 5.20181020 to 5.20181120.
	62
	63	=item *
	64
65	L<NDBM_File> has been upgraded from version 1.14 to 1.15.
66
67	=item *
68
69	L<ODBM_File> has been upgraded from version 1.15 to 1.16.
70
71	=item *
72
73	L<re> has been upgraded from version 0.36 to 0.37.
74
75	=item *
76
77	L<SDBM_File> has been upgraded from version 1.14 to 1.15.
78
79	=back
80
81	=head1 Documentation
82
83	=head2 Changes to Existing Documentation
84
85	We have attempted to update the documentation to reflect the changes
86	listed in this document. If you find any we have missed, send email
87	to L<perlbug@perl.org\|mailto:perlbug@perl.org>.
88
89	Additionally, the following selected changes have been made:
90
91	=head3 L<perlfunc>
92
93	=over 4
94
95	=item *
96
97	The entry for L<perlfunc/-X> has been clarified to indicate that symbolic
98	links are followed for most tests.
99
100	=back
101
102	=head1 Configuration and Compilation
103
104	=over 4
105
106	=item *
107
49e38958	108	Normally the thread-safe functions are used only on threaded builds.
4380f76d KE	109	It is now possible to force their use on unthreaded builds on systems
	110	that have them available, by including the
	111	C<-Accflags='-DUSE_THREAD_SAFE_LOCALE'> option to F<Configure>.
	112
	113	=back
	114
	115	=head1 Testing
	116
	117	Tests were added and changed to reflect the other additions and changes
	118	in this release.
	119
	120	=head1 Platform Support
	121
	122	=head2 Platform-Specific Notes
	123
	124	=over 4
	125
	126	=item Mac OS X
	127
	128	Perl's build and testing process on Mac OS X for C<-Duseshrplib>
	129	builds is now compatible with Mac OS X System Integrity Protection
	130	(SIP).
	131
	132	SIP prevents binaries in F</bin> (and a few other places) being passed
	133	the C<DYLD_LIBRARY_PATH> environment variable. For our purposes this
	134	prevents C<DYLD_LIBRARY_PATH> from being passed to the shell, which
	135	prevents that variable being passed to the testing or build process,
	136	so running C<perl> couldn't find F<libperl.dylib>.
	137
	138	To workaround that, the initial build of the F<perl> executable
	139	expects to find F<libperl.dylib> in the build directory, and the
	140	library path is then adjusted during installation to point to the
	141	installed library.
	142
	143	[perl #126706]
	144
	145	=item Minix3
	146
	147	Some support for Minix3 has been re-added.
	148
	149	=back
	150
	151	=head1 Selected Bug Fixes
	152
	153	=over 4
	154
	155	=item *
	156
	157	L<SDBM_File> is now more robust with corrupt database files. The
	158	improvements do not make SDBM files suitable as an interchange format.
	159	[perl #132147]
	160
	161	=item *
	162
	163	C<binmode($fh);> or C<binmode($fh, ':raw');> now properly removes the
	164	C<:utf8> flag from the default C<:crlf> I/O layer on Win32. [perl
	165	#133604]
	166
	167	=item *
	168
	169	The experimental reference aliasing feature was misinterpreting array and
	170	hash slice assignment as being localised, e.g.
	171
	172	\(@a[3,5,7]) = \(....);
173
174	was being interpreted as:
175
176	local \(@a[3,5,7]) = \(....);
177
178	[perl #133538]
179
180	=back
181
182	=head1 Acknowledgements
183
184	Perl 5.29.5 represents approximately 4 weeks of development since Perl
185	5.29.4 and contains approximately 4,000 lines of changes across 110 files
186	from 18 authors.
187
188	Excluding auto-generated files, documentation and release tools, there were
189	approximately 2,600 lines of changes to 51 .pm, .t, .c and .h files.
190
191	Perl continues to flourish into its fourth decade thanks to a vibrant
192	community of users and developers. The following people are known to have
193	contributed the improvements that became Perl 5.29.5:
194
195	Aaron Crane, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Dan
196	Dedrick, David Cantrell, David Mitchell, Dominic Hargreaves, H.Merijn Brand,
197	James Clarke, James E Keenan, Karen Etheridge, Karl Williamson, Niko Tyni,
198	Pali, Phil Pearl (Lobbes), Sawyer X, Tomasz Konojacki, Tony Cook.
199
200	The list above is almost certainly incomplete as it is automatically
201	generated from version control history. In particular, it does not include
202	the names of the (very much appreciated) contributors who reported issues to
203	the Perl bug tracker.
204
205	Many of the changes included in this version originated in the CPAN modules
206	included in Perl's core. We're grateful to the entire CPAN community for
207	helping Perl to flourish.
208
209	For a more complete list of all of Perl's historical contributors, please
210	see the F<AUTHORS> file in the Perl source distribution.
211
212	=head1 Reporting Bugs
213
214	If you find what you think is a bug, you might check the perl bug database
215	at L<https://rt.perl.org/>. There may also be information at
216	L<http://www.perl.org/>, the Perl Home Page.
217
218	If you believe you have an unreported bug, please run the L<perlbug> program
219	included with your release. Be sure to trim your bug down to a tiny but
220	sufficient test case. Your bug report, along with the output of C<perl -V>,
221	will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
222
223	If the bug you are reporting has security implications which make it
224	inappropriate to send to a publicly archived mailing list, then see
225	L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
226	for details of how to report the issue.
227
228	=head1 Give Thanks
229
230	If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
231	you can do so by running the C<perlthanks> program:
232
233	perlthanks
234
235	This will send an email to the Perl 5 Porters list with your show of thanks.
236
237	=head1 SEE ALSO
238
239	The F<Changes> file for an explanation of how to view exhaustive details on
240	what changed.
241
242	The F<INSTALL> file for how to build Perl.
243
244	The F<README> file for general stuff.
245
246	The F<Artistic> and F<Copying> files for copyright information.
247
248	=cut