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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
8c8d6154 SH |
5 | [ this is a template for a new perldelta file. Any text flagged as XXX needs |
6 | to be processed before release. ] | |
7 | ||
8 | perldelta - what is new for perl v5.21.5 | |
c68523cb | 9 | |
238894db | 10 | =head1 DESCRIPTION |
c68523cb | 11 | |
8c8d6154 | 12 | This document describes differences between the 5.21.4 release and the 5.21.5 |
238894db | 13 | release. |
c68523cb | 14 | |
8c8d6154 SH |
15 | If you are upgrading from an earlier release such as 5.21.3, first read |
16 | L<perl5214delta>, which describes differences between 5.21.3 and 5.21.4. | |
8435afd1 | 17 | |
8c8d6154 | 18 | =head1 Notice |
8435afd1 | 19 | |
8c8d6154 | 20 | XXX Any important notices here |
5cfa0642 | 21 | |
8c8d6154 | 22 | =head1 Core Enhancements |
5cfa0642 | 23 | |
8c8d6154 SH |
24 | XXX New core language features go here. Summarize user-visible core language |
25 | enhancements. Particularly prominent performance optimisations could go | |
26 | here, but most should go in the L</Performance Enhancements> section. | |
8435afd1 | 27 | |
8c8d6154 | 28 | [ List each enhancement as a =head2 entry ] |
8435afd1 | 29 | |
b15c1b56 AF |
30 | =head2 Perl now supports POSIX 2008 locale currency additions. |
31 | ||
32 | On platforms that are able to handle POSIX.1-2008, the | |
33 | hash returned by | |
34 | L<C<POSIX::localeconv()>|perllocale/The localeconv function> | |
35 | includes the international currency fields added by that version of the | |
36 | POSIX standard. These are | |
37 | C<int_n_cs_precedes>, | |
38 | C<int_n_sep_by_space>, | |
39 | C<int_n_sign_posn>, | |
40 | C<int_p_cs_precedes>, | |
41 | C<int_p_sep_by_space>, | |
42 | and | |
43 | C<int_p_sign_posn>. | |
44 | ||
8c8d6154 | 45 | =head1 Security |
5cfa0642 | 46 | |
8c8d6154 SH |
47 | XXX Any security-related notices go here. In particular, any security |
48 | vulnerabilities closed should be noted here rather than in the | |
49 | L</Selected Bug Fixes> section. | |
8435afd1 | 50 | |
8c8d6154 | 51 | [ List each security issue as a =head2 entry ] |
8435afd1 | 52 | |
8c8d6154 | 53 | =head1 Incompatible Changes |
5cfa0642 | 54 | |
8c8d6154 | 55 | XXX For a release on a stable branch, this section aspires to be: |
8435afd1 | 56 | |
8c8d6154 SH |
57 | There are no changes intentionally incompatible with 5.XXX.XXX |
58 | If any exist, they are bugs, and we request that you submit a | |
59 | report. See L</Reporting Bugs> below. | |
5b319db8 | 60 | |
8c8d6154 | 61 | [ List each incompatible change as a =head2 entry ] |
5cfa0642 | 62 | |
8c8d6154 | 63 | =head1 Deprecations |
d0ab07ee | 64 | |
8c8d6154 | 65 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
d0ab07ee | 66 | |
8c8d6154 | 67 | =head2 Module removals |
5cfa0642 | 68 | |
8c8d6154 | 69 | XXX Remove this section if inapplicable. |
d0ab07ee | 70 | |
8c8d6154 SH |
71 | The following modules will be removed from the core distribution in a |
72 | future release, and will at that time need to be installed from CPAN. | |
73 | Distributions on CPAN which require these modules will need to list them as | |
74 | prerequisites. | |
8435afd1 | 75 | |
8c8d6154 SH |
76 | The core versions of these modules will now issue C<"deprecated">-category |
77 | warnings to alert you to this fact. To silence these deprecation warnings, | |
78 | install the modules in question from CPAN. | |
46274848 | 79 | |
8c8d6154 SH |
80 | Note that these are (with rare exceptions) fine modules that you are encouraged |
81 | to continue to use. Their disinclusion from core primarily hinges on their | |
82 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
83 | not usually on concerns over their design. | |
46274848 | 84 | |
8c8d6154 | 85 | =over |
d0ab07ee | 86 | |
8c8d6154 | 87 | =item XXX |
5cfa0642 | 88 | |
8c8d6154 SH |
89 | XXX Note that deprecated modules should be listed here even if they are listed |
90 | as an updated module in the L</Modules and Pragmata> section. | |
5cfa0642 | 91 | |
8c8d6154 | 92 | =back |
8435afd1 | 93 | |
8c8d6154 | 94 | [ List each other deprecation as a =head2 entry ] |
8435afd1 | 95 | |
8c8d6154 | 96 | =head1 Performance Enhancements |
5cfa0642 | 97 | |
8c8d6154 SH |
98 | XXX Changes which enhance performance without changing behaviour go here. |
99 | There may well be none in a stable release. | |
8435afd1 | 100 | |
8c8d6154 | 101 | [ List each enhancement as a =item entry ] |
8435afd1 | 102 | |
8c8d6154 | 103 | =over 4 |
5cfa0642 | 104 | |
8435afd1 SH |
105 | =item * |
106 | ||
1dc08634 FC |
107 | C<length> is up to 20% faster for non-magical/non-tied scalars containing a |
108 | string if it is a non-utf8 string or if C<use bytes;> is in scope. | |
5cfa0642 | 109 | |
5b306eef DD |
110 | =item * |
111 | ||
112 | Non-magical/non-tied scalars that contain only a floating point value and are | |
113 | on most Perl builds with 64 bit integers now use 8-32 less bytes of memory | |
114 | depending on OS. | |
115 | ||
8c8d6154 | 116 | =back |
d0ab07ee | 117 | |
8c8d6154 | 118 | =head1 Modules and Pragmata |
d0ab07ee | 119 | |
8c8d6154 SH |
120 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
121 | go here. If Module::CoreList is updated, generate an initial draft of the | |
122 | following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary | |
123 | for important changes should then be added by hand. In an ideal world, | |
124 | dual-life modules would have a F<Changes> file that could be cribbed. | |
5cfa0642 | 125 | |
8c8d6154 | 126 | [ Within each section, list entries as a =item entry ] |
8435afd1 | 127 | |
8c8d6154 | 128 | =head2 New Modules and Pragmata |
8435afd1 | 129 | |
8c8d6154 | 130 | =over 4 |
5cfa0642 | 131 | |
8435afd1 SH |
132 | =item * |
133 | ||
8c8d6154 | 134 | XXX |
5cfa0642 | 135 | |
39c4a6cf | 136 | =back |
9c97a342 | 137 | |
8c8d6154 | 138 | =head2 Updated Modules and Pragmata |
d99849ae | 139 | |
39c4a6cf | 140 | =over 4 |
d99849ae | 141 | |
ff433f2d PM |
142 | =item * |
143 | ||
84d03adf SH |
144 | L<Module::CoreList> has been upgraded from version 5.20140920 to 5.20141020. |
145 | ||
146 | Updated to cover the latest releases of Perl. | |
ff433f2d | 147 | |
13900f93 | 148 | =back |
aac7f82f | 149 | |
8c8d6154 | 150 | =head2 Removed Modules and Pragmata |
aac7f82f | 151 | |
5cfa0642 | 152 | =over 4 |
6d9b7c7c | 153 | |
5cfa0642 | 154 | =item * |
2a395b86 | 155 | |
8c8d6154 | 156 | XXX |
2a395b86 | 157 | |
5cfa0642 | 158 | =back |
2a395b86 | 159 | |
8c8d6154 | 160 | =head1 Documentation |
2a395b86 | 161 | |
8c8d6154 SH |
162 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
163 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
5cfa0642 | 164 | |
8c8d6154 | 165 | =head2 New Documentation |
39c4a6cf | 166 | |
8c8d6154 | 167 | XXX Changes which create B<new> files in F<pod/> go here. |
2a395b86 | 168 | |
8c8d6154 | 169 | =head3 L<XXX> |
2a395b86 | 170 | |
8c8d6154 | 171 | XXX Description of the purpose of the new file here |
2a395b86 | 172 | |
8c8d6154 | 173 | =head2 Changes to Existing Documentation |
8435afd1 | 174 | |
8c8d6154 SH |
175 | XXX Changes which significantly change existing files in F<pod/> go here. |
176 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
177 | section. | |
8435afd1 | 178 | |
8c8d6154 | 179 | =head3 L<XXX> |
8435afd1 SH |
180 | |
181 | =over 4 | |
2a395b86 | 182 | |
12d22d1f JK |
183 | =item * |
184 | ||
8c8d6154 | 185 | XXX Description of the change here |
12d22d1f | 186 | |
2a395b86 PM |
187 | =back |
188 | ||
39c4a6cf | 189 | =head1 Diagnostics |
2a395b86 | 190 | |
39c4a6cf PM |
191 | The following additions or changes have been made to diagnostic output, |
192 | including warnings and fatal error messages. For the complete list of | |
193 | diagnostic messages, see L<perldiag>. | |
2a395b86 | 194 | |
8c8d6154 SH |
195 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
196 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
2a395b86 | 197 | |
8c8d6154 | 198 | =head2 New Diagnostics |
2a395b86 | 199 | |
8c8d6154 SH |
200 | XXX Newly added diagnostic messages go under here, separated into New Errors |
201 | and New Warnings | |
2a395b86 | 202 | |
8c8d6154 | 203 | =head3 New Errors |
5cfa0642 | 204 | |
8c8d6154 | 205 | =over 4 |
2a395b86 PM |
206 | |
207 | =item * | |
208 | ||
8c8d6154 | 209 | XXX L<message|perldiag/"message"> |
2a395b86 PM |
210 | |
211 | =back | |
6d9b7c7c | 212 | |
8c8d6154 | 213 | =head3 New Warnings |
39c4a6cf | 214 | |
13900f93 | 215 | =over 4 |
7f55cec0 SH |
216 | |
217 | =item * | |
218 | ||
8c8d6154 | 219 | XXX L<message|perldiag/"message"> |
623141a1 | 220 | |
8c8d6154 | 221 | =back |
aac7f82f | 222 | |
8c8d6154 | 223 | =head2 Changes to Existing Diagnostics |
363d3025 | 224 | |
8c8d6154 | 225 | XXX Changes (i.e. rewording) of diagnostic messages go here |
334464b3 | 226 | |
8c8d6154 | 227 | =over 4 |
334464b3 FC |
228 | |
229 | =item * | |
230 | ||
8c8d6154 | 231 | XXX Describe change here |
ef5a9509 | 232 | |
363d3025 FC |
233 | =back |
234 | ||
8c8d6154 | 235 | =head1 Utility Changes |
4594cf53 | 236 | |
8c8d6154 SH |
237 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
238 | Most of these are built within the directory F<utils>. | |
96dcbc37 | 239 | |
8c8d6154 SH |
240 | [ List utility changes as a =head2 entry for each utility and =item |
241 | entries for each change | |
242 | Use L<XXX> with program names to get proper documentation linking. ] | |
96dcbc37 | 243 | |
8c8d6154 | 244 | =head2 L<XXX> |
13900f93 | 245 | |
8c8d6154 | 246 | =over 4 |
58f25ac1 MH |
247 | |
248 | =item * | |
249 | ||
8c8d6154 | 250 | XXX |
a5873648 | 251 | |
39c4a6cf | 252 | =back |
a5873648 | 253 | |
55ba8847 JH |
254 | =head1 Configuration and Compilation |
255 | ||
8c8d6154 SH |
256 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
257 | go here. Any other changes to the Perl build process should be listed here. | |
258 | However, any platform-specific changes should be listed in the | |
259 | L</Platform Support> section, instead. | |
55ba8847 | 260 | |
8c8d6154 | 261 | [ List changes as a =item entry ]. |
a5873648 | 262 | |
39c4a6cf | 263 | =over 4 |
a5873648 PM |
264 | |
265 | =item * | |
266 | ||
8c8d6154 | 267 | XXX |
7d0ccdba | 268 | |
7065301c RS |
269 | =back |
270 | ||
8c8d6154 | 271 | =head1 Testing |
d72cd2eb | 272 | |
8c8d6154 SH |
273 | XXX Any significant changes to the testing of a freshly built perl should be |
274 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
275 | large changes to the testing harness (e.g. when parallel testing was added). | |
276 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
277 | that they represent may be covered elsewhere. | |
c1284011 | 278 | |
8c8d6154 | 279 | [ List each test improvement as a =item entry ] |
375f5f06 | 280 | |
0346c3a9 | 281 | =over 4 |
375f5f06 | 282 | |
2884baee MH |
283 | =item * |
284 | ||
8c8d6154 | 285 | XXX |
6f1a844b | 286 | |
8c8d6154 | 287 | =back |
549ea8d4 | 288 | |
8c8d6154 | 289 | =head1 Platform Support |
549ea8d4 | 290 | |
8c8d6154 | 291 | XXX Any changes to platform support should be listed in the sections below. |
be0006e0 | 292 | |
8c8d6154 SH |
293 | [ Within the sections, list each platform as a =item entry with specific |
294 | changes as paragraphs below it. ] | |
be0006e0 | 295 | |
8c8d6154 | 296 | =head2 New Platforms |
1699f5c2 | 297 | |
8c8d6154 SH |
298 | XXX List any platforms that this version of perl compiles on, that previous |
299 | versions did not. These will either be enabled by new files in the F<hints/> | |
300 | directories, or new subdirectories and F<README> files at the top level of the | |
301 | source tree. | |
1699f5c2 | 302 | |
8c8d6154 | 303 | =over 4 |
7e8b2071 | 304 | |
8c8d6154 | 305 | =item XXX-some-platform |
7e8b2071 | 306 | |
8c8d6154 | 307 | XXX |
f9acf899 | 308 | |
8c8d6154 | 309 | =back |
f9acf899 | 310 | |
8c8d6154 | 311 | =head2 Discontinued Platforms |
fd26b6f0 | 312 | |
8c8d6154 | 313 | XXX List any platforms that this version of perl no longer compiles on. |
fd26b6f0 | 314 | |
8c8d6154 | 315 | =over 4 |
499333dc | 316 | |
8c8d6154 | 317 | =item XXX-some-platform |
499333dc | 318 | |
8c8d6154 | 319 | XXX |
8f0cd35a | 320 | |
8c8d6154 | 321 | =back |
8f0cd35a | 322 | |
8c8d6154 | 323 | =head2 Platform-Specific Notes |
aa292ef2 | 324 | |
8c8d6154 SH |
325 | XXX List any changes for specific platforms. This could include configuration |
326 | and compilation changes or changes in portability/compatibility. However, | |
327 | changes within modules for platforms should generally be listed in the | |
328 | L</Modules and Pragmata> section. | |
aa292ef2 | 329 | |
8c8d6154 | 330 | =over 4 |
739e9bee | 331 | |
8c8d6154 | 332 | =item XXX-some-platform |
739e9bee | 333 | |
8c8d6154 | 334 | XXX |
b23b2fdb | 335 | |
8c8d6154 | 336 | =back |
b23b2fdb | 337 | |
8c8d6154 | 338 | =head1 Internal Changes |
7d15b1a8 | 339 | |
8c8d6154 SH |
340 | XXX Changes which affect the interface available to C<XS> code go here. Other |
341 | significant internal changes for future core maintainers should be noted as | |
342 | well. | |
7d15b1a8 | 343 | |
8c8d6154 | 344 | [ List each change as a =item entry ] |
bbca64cf | 345 | |
8c8d6154 | 346 | =over 4 |
bbca64cf | 347 | |
0064f8cc KW |
348 | =item * |
349 | ||
8c8d6154 | 350 | XXX |
6ff8f256 | 351 | |
8c8d6154 | 352 | =back |
6ff8f256 | 353 | |
8c8d6154 | 354 | =head1 Selected Bug Fixes |
80cc3290 | 355 | |
8c8d6154 SH |
356 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
357 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
80cc3290 | 358 | |
8c8d6154 | 359 | [ List each fix as a =item entry ] |
13dd5671 | 360 | |
8c8d6154 | 361 | =over 4 |
13dd5671 | 362 | |
bdab7676 FC |
363 | =item * |
364 | ||
8c8d6154 | 365 | XXX |
bdab7676 | 366 | |
8c8d6154 | 367 | =back |
3a085d00 | 368 | |
8c8d6154 | 369 | =head1 Known Problems |
caa66803 | 370 | |
8c8d6154 SH |
371 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
372 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
373 | platform specific bugs also go here. | |
caa66803 | 374 | |
8c8d6154 | 375 | [ List each fix as a =item entry ] |
91766151 | 376 | |
8c8d6154 | 377 | =over 4 |
91766151 | 378 | |
dd593f1d FC |
379 | =item * |
380 | ||
8c8d6154 | 381 | XXX |
fb3b7425 | 382 | |
8c8d6154 | 383 | =back |
fb3b7425 | 384 | |
8c8d6154 | 385 | =head1 Errata From Previous Releases |
b245455d | 386 | |
8c8d6154 | 387 | =over 4 |
b245455d | 388 | |
26dd5fd6 PM |
389 | =item * |
390 | ||
8c8d6154 SH |
391 | XXX Add anything here that we forgot to add, or were mistaken about, in |
392 | the perldelta of a previous release. | |
ff433f2d | 393 | |
5b306eef DD |
394 | =item * |
395 | ||
396 | SVs of type SVt_NV are now bodyless when a build configure and platform allow | |
397 | it, specifically C<sizeof(NV) <= sizeof(IV)>. The bodyless trick is the same one | |
398 | as for IVs since 5.9.2, but for NVs, unlike IVs, is not guarenteed on all | |
399 | platforms and build configurations. | |
400 | ||
39c4a6cf PM |
401 | =back |
402 | ||
8c8d6154 | 403 | =head1 Obituary |
c0c55a9b | 404 | |
8c8d6154 SH |
405 | XXX If any significant core contributor has died, we've added a short obituary |
406 | here. | |
c0c55a9b | 407 | |
8c8d6154 | 408 | =head1 Acknowledgements |
c0c55a9b | 409 | |
8c8d6154 | 410 | XXX Generate this with: |
e831f11a | 411 | |
8c8d6154 | 412 | perl Porting/acknowledgements.pl v5.21.4..HEAD |
f5b73711 | 413 | |
44691e6f AB |
414 | =head1 Reporting Bugs |
415 | ||
e08634c5 SH |
416 | If you find what you think is a bug, you might check the articles recently |
417 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
238894db | 418 | https://rt.perl.org/ . There may also be information at |
7ef8b31d | 419 | http://www.perl.org/ , the Perl Home Page. |
44691e6f | 420 | |
e08634c5 SH |
421 | If you believe you have an unreported bug, please run the L<perlbug> program |
422 | included with your release. Be sure to trim your bug down to a tiny but | |
423 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
424 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
425 | |
426 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
427 | inappropriate to send to a publicly archived mailing list, then please send it |
428 | to perl5-security-report@perl.org. This points to a closed subscription | |
429 | unarchived mailing list, which includes all the core committers, who will be | |
430 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 431 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
432 | platforms on which Perl is supported. Please only use this address for |
433 | security issues in the Perl core, not for modules independently distributed on | |
434 | CPAN. | |
44691e6f AB |
435 | |
436 | =head1 SEE ALSO | |
437 | ||
e08634c5 SH |
438 | The F<Changes> file for an explanation of how to view exhaustive details on |
439 | what changed. | |
44691e6f AB |
440 | |
441 | The F<INSTALL> file for how to build Perl. | |
442 | ||
443 | The F<README> file for general stuff. | |
444 | ||
445 | The F<Artistic> and F<Copying> files for copyright information. | |
446 | ||
447 | =cut |