[p5sagit/p5-mst-13.2.git] / pod / perl5130delta.pod

=encoding utf8

=head1 NAME

[ 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 v5.13.0

=head1 DESCRIPTION

This document describes differences between the 5.13.0 release and
the 5.13.0 elease.

If you are upgrading from an earlier release such as 5.10.0, first read
L<perl5120delta>, which describes differences between 5.10.0 and
5.12.0.

=head1 Notice

XXX Any important notices here

=head1 Incompatible Changes

XXX For a release on a stable branch, this section aspires to be:

    There are no changes intentionally incompatible with 5.XXX.XXX. If any
    exist, they are bugs and reports are welcome.


=head1 Core Enhancements

=head2 "safe signals" optimization

Signal dispatch has been moved from the runloop into control ops. This should
give a few percent speed increase, and eliminates almost all of the speed
penalty caused by the introduction of "safe signals" in 5.8.0. Signals should
still be dispatched within the same statement as they were previously - if
this is not the case, or it is possible to create uninterruptable loops, this
is a bug, and reports are encouraged of how to recreate such issues.

=head2 Assignment to C<$0> sets the legacy process name with C<prctl()> on Linux

On Linux the legacy process name will be set with L<prctl(2)>, in
addition to altering the POSIX name via C<argv[0]> as perl has done
since version 4.000. Now system utilities that read the legacy process
name such as ps, top and killall will recognize the name you set when
assigning to C<$0>. The string you supply will be cut off at 16 bytes,
this is a limitation imposed by Linux.

=head1 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.

=head1 Modules and Pragmata

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>, which prints stub
entries to STDOUT.  Results can be pasted in place of the '=head2' entries
below.  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.

=head2 New Modules and Pragmata

=head2 Pragmata Changes

=head2 Updated Modules

=head2 Removed Modules and Pragmata

=head1 Utility Changes

XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
here. Most of these are built within the directories F<utils> and F<x2p>.

=over 4

=item F<XXX>

XXX

=back

=head1 New Documentation

XXX Changes which create B<new> files in F<pod/> go here.

=over 4

=item L<XXX>

XXX

=back

=head1 Changes to Existing Documentation

XXX Changes which significantly change existing files in F<pod/> go here.
Any changes to F<pod/perldiag.pod> should go in L</New or Changed Diagnostics>.


=head1 Performance Enhancements

XXX Changes which enhance performance without changing behaviour go here. There
may well be none in a stable release.

=over 4

=item *

XXX

=back

=head1 Installation and Configuration Improvements

XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
go here.

=head2 Configuration improvements

XXX

=head2 Compilation improvements

XXX

=head2 Platform Specific Changes

=over 4

=item XXX-some-platform

XXX

=back

=head1 Selected Bug Fixes

XXX Important bug fixes in the core language are summarised here.
Bug fixes in files in F<ext/> and F<lib/> are best summarised in
L</Modules and Pragmata>.

=over 4

=item *

XXX

=back

=head1 New or Changed Diagnostics

XXX New or changed warnings emitted by the core's C<C> code go here.

=over 4

=item C<XXX>

XXX

=back

=head1 Changed Internals

XXX Changes which affect the interface available to C<XS> code go here.

=over 4

=item *

XXX

=back

=head1 New Tests

XXX Changes which create B<new> files in F<t/> go here. Changes to
existing files in F<t/> aren't worth summarising, although the bugs that
they represent may be.

=over 4

=item F<XXX>

XXX

=back

=head1 Known Problems

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, unless
they were specific to a particular platform (see below).

This is a list of some significant unfixed bugs, which are regressions
from either 5.XXX.XXX or 5.XXX.XXX.

=over 4

=item *

XXX

=back

=head1 Deprecations

XXX Add any new known deprecations here.

The following items are now deprecated.

=over 4

=item *

XXX

=back

=head1 Platform Specific Notes

XXX Any changes specific to a particular platform. VMS and Win32 are the usual
stars here. It's probably best to group changes under the same section layout
as the main perldelta

=head1 Obituary

XXX If any significant core contributor has died, we've added a short obituary
here.

=head1 Acknowledgements

XXX The list of people to thank goes here.


=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 http://rt.perl.org/perlbug/ .  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 B<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 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
Commit	Line	Data
20d57231	1	=encoding utf8
	2
	3	=head1 NAME
	4
	5	[ this is a template for a new perldelta file. Any text flagged as
	6	XXX needs to be processed before release. ]
	7
	8	perldelta - what is new for perl v5.13.0
	9
	10	=head1 DESCRIPTION
	11
	12	This document describes differences between the 5.13.0 release and
	13	the 5.13.0 elease.
	14
	15	If you are upgrading from an earlier release such as 5.10.0, first read
	16	L<perl5120delta>, which describes differences between 5.10.0 and
	17	5.12.0.
	18
	19	=head1 Notice
	20
	21	XXX Any important notices here
	22
	23	=head1 Incompatible Changes
	24
	25	XXX For a release on a stable branch, this section aspires to be:
	26
	27	There are no changes intentionally incompatible with 5.XXX.XXX. If any
	28	exist, they are bugs and reports are welcome.
	29
	30
	31	=head1 Core Enhancements
	32
4207d19c	33	=head2 "safe signals" optimization
4207d19c	34
da76b859	35	Signal dispatch has been moved from the runloop into control ops. This should
	36	give a few percent speed increase, and eliminates almost all of the speed
	37	penalty caused by the introduction of "safe signals" in 5.8.0. Signals should
	38	still be dispatched within the same statement as they were previously - if
	39	this is not the case, or it is possible to create uninterruptable loops, this
	40	is a bug, and reports are encouraged of how to recreate such issues.
20d57231	41
3506daea	42	=head2 Assignment to C<$0> sets the legacy process name with C<prctl()> on Linux
	43
	44	On Linux the legacy process name will be set with L<prctl(2)>, in
	45	addition to altering the POSIX name via C<argv[0]> as perl has done
	46	since version 4.000. Now system utilities that read the legacy process
	47	name such as ps, top and killall will recognize the name you set when
	48	assigning to C<$0>. The string you supply will be cut off at 16 bytes,
	49	this is a limitation imposed by Linux.
	50
20d57231	51	=head1 New Platforms
	52
	53	XXX List any platforms that this version of perl compiles on, that previous
	54	versions did not. These will either be enabled by new files in the F<hints/>
	55	directories, or new subdirectories and F<README> files at the top level of the
	56	source tree.
	57
	58	=head1 Modules and Pragmata
	59
	60	XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
	61	go here. If Module::CoreList is updated, generate an initial draft of the
	62	following sections using F<Porting/corelist-perldelta.pl>, which prints stub
	63	entries to STDOUT. Results can be pasted in place of the '=head2' entries
	64	below. A paragraph summary for important changes should then be added by hand.
	65	In an ideal world, dual-life modules would have a F<Changes> file that could be
	66	cribbed.
	67
	68	=head2 New Modules and Pragmata
	69
	70	=head2 Pragmata Changes
	71
	72	=head2 Updated Modules
	73
	74	=head2 Removed Modules and Pragmata
	75
	76	=head1 Utility Changes
	77
	78	XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
	79	here. Most of these are built within the directories F<utils> and F<x2p>.
	80
	81	=over 4
	82
	83	=item F<XXX>
	84
	85	XXX
	86
	87	=back
	88
	89	=head1 New Documentation
	90
	91	XXX Changes which create B<new> files in F<pod/> go here.
	92
	93	=over 4
	94
	95	=item L<XXX>
	96
	97	XXX
	98
	99	=back
	100
	101	=head1 Changes to Existing Documentation
	102
	103	XXX Changes which significantly change existing files in F<pod/> go here.
	104	Any changes to F<pod/perldiag.pod> should go in L</New or Changed Diagnostics>.
	105
	106
	107	=head1 Performance Enhancements
	108
	109	XXX Changes which enhance performance without changing behaviour go here. There
	110	may well be none in a stable release.
	111
	112	=over 4
	113
	114	=item *
115
116	XXX
117
118	=back
119
120	=head1 Installation and Configuration Improvements
121
122	XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
123	go here.
124
125	=head2 Configuration improvements
126
127	XXX
128
129	=head2 Compilation improvements
130
131	XXX
132
133	=head2 Platform Specific Changes
134
135	=over 4
136
137	=item XXX-some-platform
138
139	XXX
140
141	=back
142
143	=head1 Selected Bug Fixes
144
145	XXX Important bug fixes in the core language are summarised here.
146	Bug fixes in files in F<ext/> and F<lib/> are best summarised in
147	L</Modules and Pragmata>.
148
149	=over 4
150
151	=item *
152
153	XXX
154
155	=back
156
157	=head1 New or Changed Diagnostics
158
159	XXX New or changed warnings emitted by the core's C<C> code go here.
160
161	=over 4
162
163	=item C<XXX>
164
165	XXX
166
167	=back
168
169	=head1 Changed Internals
170
171	XXX Changes which affect the interface available to C<XS> code go here.
172
173	=over 4
174
175	=item *
176
177	XXX
178
179	=back
180
181	=head1 New Tests
182
183	XXX Changes which create B<new> files in F<t/> go here. Changes to
184	existing files in F<t/> aren't worth summarising, although the bugs that
185	they represent may be.
186
187	=over 4
188
189	=item F<XXX>
190
191	XXX
192
193	=back
194
195	=head1 Known Problems
196
197	XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
198	tests that had to be C<TODO>ed for the release would be noted here, unless
199	they were specific to a particular platform (see below).
200
201	This is a list of some significant unfixed bugs, which are regressions
202	from either 5.XXX.XXX or 5.XXX.XXX.
203
204	=over 4
205
206	=item *
207
208	XXX
209
210	=back
211
212	=head1 Deprecations
213
214	XXX Add any new known deprecations here.
215
216	The following items are now deprecated.
217
218	=over 4
219
220	=item *
221
222	XXX
223
224	=back
225
226	=head1 Platform Specific Notes
227
228	XXX Any changes specific to a particular platform. VMS and Win32 are the usual
229	stars here. It's probably best to group changes under the same section layout
230	as the main perldelta
231
232	=head1 Obituary
233
234	XXX If any significant core contributor has died, we've added a short obituary
235	here.
236
237	=head1 Acknowledgements
238
239	XXX The list of people to thank goes here.
240
241
242	=head1 Reporting Bugs
243
244	If you find what you think is a bug, you might check the articles
245	recently posted to the comp.lang.perl.misc newsgroup and the perl
246	bug database at http://rt.perl.org/perlbug/ . There may also be
247	information at http://www.perl.org/ , the Perl Home Page.
248
249	If you believe you have an unreported bug, please run the B<perlbug>
250	program included with your release. Be sure to trim your bug down
251	to a tiny but sufficient test case. Your bug report, along with the
252	output of C<perl -V>, will be sent off to perlbug@perl.org to be
253	analysed by the Perl porting team.
254
255	If the bug you are reporting has security implications, which make it
256	inappropriate to send to a publicly archived mailing list, then please send
257	it to perl5-security-report@perl.org. This points to a closed subscription
258	unarchived mailing list, which includes all the core committers, who be able
259	to help assess the impact of issues, figure out a resolution, and help
260	co-ordinate the release of patches to mitigate or fix the problem across all
261	platforms on which Perl is supported. Please only use this address for
262	security issues in the Perl core, not for modules independently
263	distributed on CPAN.
264
265	=head1 SEE ALSO
266
267	The F<Changes> file for an explanation of how to view exhaustive details
268	on what changed.
269
270	The F<INSTALL> file for how to build Perl.
271
272	The F<README> file for general stuff.
273
274	The F<Artistic> and F<Copying> files for copyright information.
275
276	=cut