Commit | Line | Data |
ba8251e8 |
1 | =head1 NAME |
2 | |
2bb14304 |
3 | perldelta - what's new for perl5.006 (as of 5.005_56) |
ba8251e8 |
4 | |
5 | =head1 DESCRIPTION |
6 | |
7 | This document describes differences between the 5.005 release and this one. |
8 | |
9 | =head1 Incompatible Changes |
10 | |
e02fdbd2 |
11 | =head2 Perl Source Incompatibilities |
12 | |
13 | None known at this time. |
14 | |
15 | =head2 C Source Incompatibilities |
16 | |
17 | =over 4 |
18 | |
19 | =item C<PERL_POLLUTE> |
20 | |
21 | Release 5.005 grandfathered old global symbol names by providing preprocessor |
22 | macros for extension source compatibility. As of release 5.006, these |
23 | preprocessor definitions are not available by default. You need to explicitly |
14218588 |
24 | compile perl with C<-DPERL_POLLUTE> to get these definitions. For |
25 | extensions still using the old symbols, this option can be |
2aea4d40 |
26 | specified via MakeMaker: |
27 | |
14218588 |
28 | perl Makefile.PL POLLUTE=1 |
e02fdbd2 |
29 | |
86058a2d |
30 | =item C<PERL_POLLUTE_MALLOC> |
31 | |
14218588 |
32 | Enabling Perl's malloc in release 5.005 and earlier caused |
86058a2d |
33 | the namespace of system versions of the malloc family of functions to |
14218588 |
34 | be usurped by the Perl versions, since by default they used the |
35 | same names. |
86058a2d |
36 | |
37 | Besides causing problems on platforms that do not allow these functions to |
38 | be cleanly replaced, this also meant that the system versions could not |
39 | be called in programs that used Perl's malloc. Previous versions of Perl |
14218588 |
40 | have allowed this behaviour to be suppressed with the HIDEMYMALLOC and |
86058a2d |
41 | EMBEDMYMALLOC preprocessor definitions. |
42 | |
43 | As of release 5.006, Perl's malloc family of functions have default names |
44 | distinct from the system versions. You need to explicitly compile perl with |
14218588 |
45 | C<-DPERL_POLLUTE_MALLOC> to get the older behaviour. HIDEMYMALLOC |
46 | and EMBEDMYMALLOC have no effect, since the behaviour they enabled is now |
86058a2d |
47 | the default. |
48 | |
49 | Note that these functions do B<not> constitute Perl's memory allocation API. |
50 | See L<perlguts/"Memory Allocation"> for further information about that. |
51 | |
e02fdbd2 |
52 | =item C<PL_na> and C<dTHR> Issues |
53 | |
54 | The C<PL_na> global is now thread local, so a C<dTHR> declaration is needed |
14218588 |
55 | in the scope in which the global appears. XSUBs should handle this automatically, |
e02fdbd2 |
56 | but if you have used C<PL_na> in support functions, you either need to |
57 | change the C<PL_na> to a local variable (which is recommended), or put in |
58 | a C<dTHR>. |
59 | |
60 | =back |
61 | |
cceca5ed |
62 | =head2 Compatible C Source API Changes |
63 | |
64 | =over |
65 | |
66 | =item C<PATCHLEVEL> is now C<PERL_VERSION> |
67 | |
14218588 |
68 | The cpp macros C<PERL_REVISION>, C<PERL_VERSION>, and C<PERL_SUBVERSION> |
cceca5ed |
69 | are now available by default from perl.h, and reflect the base revision, |
14218588 |
70 | patchlevel, and subversion respectively. C<PERL_REVISION> had no |
cceca5ed |
71 | prior equivalent, while C<PERL_VERSION> and C<PERL_SUBVERSION> were |
72 | previously available as C<PATCHLEVEL> and C<SUBVERSION>. |
73 | |
14218588 |
74 | The new names cause less pollution of the B<cpp> namespace and reflect what |
cceca5ed |
75 | the numbers have come to stand for in common practice. For compatibility, |
14218588 |
76 | the old names are still supported when F<patchlevel.h> is explicitly |
cceca5ed |
77 | included (as required before), so there is no source incompatibility |
14218588 |
78 | from the change. |
cceca5ed |
79 | |
80 | =back |
81 | |
e02fdbd2 |
82 | =head2 Binary Incompatibilities |
83 | |
14218588 |
84 | This release is not binary compatible with the 5.005 release or its |
e02fdbd2 |
85 | maintenance versions. |
86 | |
ba8251e8 |
87 | =head1 Core Changes |
88 | |
9d73390d |
89 | =head2 Unicode and UTF-8 support |
90 | |
91 | Perl can optionally use UTF-8 as its internal representation for character |
92 | strings. The C<use utf8> pragma enables this support in the current lexical |
93 | scope. See L<utf8> for more information. |
94 | |
95 | =head2 Lexically scoped warning categories |
96 | |
97 | You can now control the granularity of warnings emitted by perl at a finer |
98 | level using the C<use warning> pragma. See L<warning> for details. |
99 | |
5fdc711f |
100 | =head2 Binary numbers supported |
101 | |
4f19785b |
102 | Binary numbers are now supported as literals, in s?printf formats, and |
103 | C<oct()>: |
104 | |
14218588 |
105 | $answer = 0b101010; |
106 | printf "The answer is: %b\n", oct("0b101010"); |
4f19785b |
107 | |
5fdc711f |
108 | =head2 syswrite() ease-of-use |
109 | |
6c67e1bb |
110 | The length argument of C<syswrite()> is now optional. |
111 | |
5fdc711f |
112 | =head2 64-bit support |
113 | |
6c67e1bb |
114 | Better 64-bit support -- but full support still a distant goal. One |
115 | must Configure with -Duse64bits to get Configure to probe for the |
116 | extent of 64-bit support. Depending on the platform (hints file) more |
117 | or less 64-awareness becomes available. As of 5.005_54 at least |
118 | somewhat 64-bit aware platforms are HP-UX 11 or better, Solaris 2.6 or |
119 | better, IRIX 6.2 or better. Naturally 64-bit platforms like Digital |
19799a22 |
120 | Unix and UNICOS also have 64-bit support. |
e02fdbd2 |
121 | |
62c18ce2 |
122 | =head2 Better syntax checks on parenthesized unary operators |
123 | |
124 | Expressions such as: |
125 | |
14218588 |
126 | print defined(&foo,&bar,&baz); |
127 | print uc("foo","bar","baz"); |
128 | undef($foo,&bar); |
62c18ce2 |
129 | |
7711098a |
130 | used to be accidentally allowed in earlier versions, and produced |
14218588 |
131 | unpredictable behaviour. Some produced ancillary warnings |
132 | when used in this way; others silently did the wrong thing. |
62c18ce2 |
133 | |
134 | The parenthesized forms of most unary operators that expect a single |
14218588 |
135 | argument now ensure that they are not called with more than one |
136 | argument, making the cases shown above syntax errors. The usual |
137 | behaviour of: |
62c18ce2 |
138 | |
14218588 |
139 | print defined &foo, &bar, &baz; |
140 | print uc "foo", "bar", "baz"; |
141 | undef $foo, &bar; |
62c18ce2 |
142 | |
143 | remains unchanged. See L<perlop>. |
144 | |
5a929a98 |
145 | =head2 Improved C<qw//> operator |
8127e0e3 |
146 | |
26ef7447 |
147 | The C<qw//> operator is now evaluated at compile time into a true list |
148 | instead of being replaced with a run time call to C<split()>. This |
14218588 |
149 | removes the confusing misbehaviour of C<qw//> in scalar context, which |
150 | had inherited that behaviour from split(). |
26ef7447 |
151 | |
152 | Thus: |
153 | |
154 | $foo = ($bar) = qw(a b c); print "$foo|$bar\n"; |
155 | |
156 | now correctly prints "3|a", instead of "2|a". |
8127e0e3 |
157 | |
5a929a98 |
158 | =head2 pack() format 'Z' supported |
159 | |
160 | The new format type 'Z' is useful for packing and unpacking null-terminated |
161 | strings. See L<perlfunc/"pack">. |
8127e0e3 |
162 | |
4d0c1c44 |
163 | =head2 pack() format modifier '!' supported |
ee3907e2 |
164 | |
14218588 |
165 | The new format type modifier '!' is useful for packing and unpacking |
ee3907e2 |
166 | native shorts, ints, and longs. See L<perlfunc/"pack">. |
167 | |
2b92dfce |
168 | =head2 $^X variables may now have names longer than one character |
169 | |
170 | Formerly, $^X was synonymous with ${"\cX"}, but $^XY was a syntax |
171 | error. Now variable names that begin with a control character may be |
172 | arbitrarily long. However, for compatibility reasons, these variables |
173 | I<must> be written with explicit braces, as C<${^XY}> for example. |
14218588 |
174 | C<${^XYZ}> is synonymous with ${"\cXYZ"}. Variable names with more |
2b92dfce |
175 | than one control character, such as C<${^XY^Z}>, are illegal. |
176 | |
14218588 |
177 | The old syntax has not changed. As before, `^X' may be either a |
178 | literal control-X character or the two-character sequence `caret' plus |
179 | `X'. When braces are omitted, the variable name stops after the |
2b92dfce |
180 | control character. Thus C<"$^XYZ"> continues to be synonymous with |
7711098a |
181 | C<$^X . "YZ"> as before. |
2b92dfce |
182 | |
183 | As before, lexical variables may not have names beginning with control |
184 | characters. As before, variables whose names begin with a control |
14218588 |
185 | character are always forced to be in package `main'. All such variables |
186 | are reserved for future extensions, except those that begin with |
187 | C<^_>, which may be used by user programs and is guaranteed not to |
188 | acquire special meaning in any future version of Perl. |
2b92dfce |
189 | |
fbad3eb5 |
190 | =head1 Significant bug fixes |
191 | |
192 | =head2 E<lt>HANDLEE<gt> on empty files |
193 | |
194 | With C<$/> set to C<undef>, slurping an empty file returns a string of |
14218588 |
195 | zero length (instead of C<undef>, as it used to) the first time the |
196 | HANDLE is read. Further reads yield C<undef>. |
fbad3eb5 |
197 | |
198 | This means that the following will append "foo" to an empty file (it used |
14218588 |
199 | to do nothing): |
fbad3eb5 |
200 | |
201 | perl -0777 -pi -e 's/^/foo/' empty_file |
202 | |
14218588 |
203 | The behaviour of: |
fbad3eb5 |
204 | |
205 | perl -pi -e 's/^/foo/' empty_file |
206 | |
207 | is unchanged (it continues to leave the file empty). |
208 | |
0244c3a4 |
209 | =head2 C<eval '...'> improvements |
210 | |
211 | Line numbers (as reflected by caller() and most diagnostics) within |
212 | C<eval '...'> were often incorrect when here documents were involved. |
213 | This has been corrected. |
214 | |
215 | Lexical lookups for variables appearing in C<eval '...'> within |
216 | functions that were themselves called within an C<eval '...'> were |
14218588 |
217 | searching the wrong place for lexicals. The lexical search now |
218 | correctly ends at the subroutine's block boundary. |
0244c3a4 |
219 | |
220 | Parsing of here documents used to be flawed when they appeared as |
221 | the replacement expression in C<eval 's/.../.../e'>. This has |
222 | been fixed. |
223 | |
45bc9206 |
224 | =head2 Automatic flushing of output buffers |
225 | |
14218588 |
226 | fork(), exec(), system(), qx//, and pipe open()s now flush buffers |
227 | of all files opened for output when the operation |
228 | was attempted. This mostly eliminates confusing |
45bc9206 |
229 | buffering mishaps suffered by users unaware of how Perl internally |
14218588 |
230 | handles I/O. |
45bc9206 |
231 | |
ba8251e8 |
232 | =head1 Supported Platforms |
233 | |
5fdc711f |
234 | =over 4 |
235 | |
236 | =item * |
237 | |
6c67e1bb |
238 | VM/ESA is now supported. |
239 | |
5fdc711f |
240 | =item * |
241 | |
ee3907e2 |
242 | Siemens BS2000 is now supported under the POSIX Shell. |
243 | |
244 | =item * |
245 | |
2bb14304 |
246 | The Mach CThreads (NEXTSTEP, OPENSTEP) are now supported by the Thread |
247 | extension. |
6c67e1bb |
248 | |
5fdc711f |
249 | =item * |
250 | |
ee3907e2 |
251 | GNU/Hurd is now supported. |
6c67e1bb |
252 | |
00ad96e1 |
253 | =item * |
254 | |
255 | Rhapsody is now supported. |
256 | |
5fdc711f |
257 | =back |
258 | |
6c67e1bb |
259 | =head1 New tests |
260 | |
261 | =over 4 |
262 | |
263 | =item op/io_const |
264 | |
265 | IO constants (SEEK_*, _IO*). |
14218588 |
266 | |
6c67e1bb |
267 | =item op/io_dir |
268 | |
269 | Directory-related IO methods (new, read, close, rewind, tied delete). |
270 | |
271 | =item op/io_multihomed |
272 | |
273 | INET sockets with multi-homed hosts. |
274 | |
275 | =item op/io_poll |
276 | |
277 | IO poll(). |
278 | |
279 | =item op/io_unix |
280 | |
281 | UNIX sockets. |
282 | |
283 | =item op/filetest |
284 | |
285 | File test operators. |
286 | |
287 | =item op/lex_assign |
288 | |
5fdc711f |
289 | Verify operations that access pad objects (lexicals and temporaries). |
6c67e1bb |
290 | |
291 | =back |
e02fdbd2 |
292 | |
ba8251e8 |
293 | =head1 Modules and Pragmata |
294 | |
3e8c4fa0 |
295 | =head2 Modules |
296 | |
b7d8191e |
297 | =over 4 |
298 | |
299 | =item Dumpvalue |
300 | |
301 | Added Dumpvalue module provides screen dumps of Perl data. |
302 | |
303 | =item Benchmark |
304 | |
868cb350 |
305 | You can now run tests for I<n> seconds instead of guessing the right |
14218588 |
306 | number of tests to run: e.g. timethese(-5, ...) will run each |
307 | code for at least 5 CPU seconds. Zero as the "number of repetitions" |
155776c0 |
308 | means "for at least 3 CPU seconds". The output format has also |
14218588 |
309 | changed. For example: |
155776c0 |
310 | |
311 | use Benchmark;$x=3;timethese(-5,{a=>sub{$x*$x},b=>sub{$x**2}}) |
312 | |
313 | will now output something like this: |
314 | |
315 | Benchmark: running a, b, each for at least 5 CPU seconds... |
316 | a: 5 wallclock secs ( 5.77 usr + 0.00 sys = 5.77 CPU) @ 200551.91/s (n=1156516) |
317 | b: 4 wallclock secs ( 5.00 usr + 0.02 sys = 5.02 CPU) @ 159605.18/s (n=800686) |
318 | |
319 | New features: "each for at least N CPU seconds...", "wallclock secs", |
320 | and the "@ operations/CPU second (n=operations)". |
b7d8191e |
321 | |
f505c983 |
322 | =item Devel::Peek |
323 | |
324 | The Devel::Peek module provides access to the internal representation |
14218588 |
325 | of Perl variables and data. It is a data debugging tool for the XS programmer. |
f505c983 |
326 | |
b7d8191e |
327 | =item Fcntl |
328 | |
329 | More Fcntl constants added: F_SETLK64, F_SETLKW64, O_LARGEFILE for |
14218588 |
330 | large (more than 4G) file access (64-bit support is not yet |
b7d8191e |
331 | working, though, so no need to get overly excited), Free/Net/OpenBSD |
332 | locking behaviour flags F_FLOCK, F_POSIX, Linux F_SHLCK, and |
333 | O_ACCMODE: the mask of O_RDONLY, O_WRONLY, and O_RDWR. |
334 | |
f505c983 |
335 | =item File::Spec |
336 | |
337 | New methods have been added to the File::Spec module: devnull() returns |
19799a22 |
338 | the name of the null device (/dev/null on Unix) and tmpdir() the name of |
14218588 |
339 | the temp directory (normally /tmp on Unix). There are now also methods |
f505c983 |
340 | to convert between absolute and relative filenames: abs2rel() and |
14218588 |
341 | rel2abs(). For compatibility with operating systems that specify volume |
342 | names in file paths, the splitpath(), splitdir(), and catdir() methods |
f505c983 |
343 | have been added. |
344 | |
345 | =item File::Spec::Functions |
346 | |
347 | The new File::Spec::Functions modules provides a function interface |
14218588 |
348 | to the File::Spec module. Allows shorthand |
f505c983 |
349 | |
14218588 |
350 | $fullname = catfile($dir1, $dir2, $file); |
f505c983 |
351 | |
352 | instead of |
353 | |
14218588 |
354 | $fullname = File::Spec->catfile($dir1, $dir2, $file); |
f505c983 |
355 | |
e16b8f49 |
356 | =item Math::BigInt |
357 | |
14218588 |
358 | The logical operations C<E<lt>E<lt>>, C<E<gt>E<gt>>, C<&>, C<|>, |
e16b8f49 |
359 | and C<~> are now supported on bigints. |
360 | |
b7d8191e |
361 | =item Math::Complex |
7711098a |
362 | |
14218588 |
363 | The accessor methods Re, Im, arg, abs, rho, and theta can now also |
868cb350 |
364 | act as mutators (accessor $z->Re(), mutator $z->Re(3)). |
b7d8191e |
365 | |
366 | =item Math::Trig |
367 | |
14218588 |
368 | A little bit of radial trigonometry (cylindrical and spherical), |
369 | radial coordinate conversions, and the great circle distance were added. |
b7d8191e |
370 | |
f4b9d880 |
371 | =item SDBM_File |
372 | |
373 | An EXISTS method has been added to this module (and sdbm_exists() has |
374 | been added to the underlying sdbm library), so one can now call exists |
14218588 |
375 | on an SDBM_File tied hash and get the correct result, rather than a |
f4b9d880 |
376 | runtime error. |
377 | |
06ef4121 |
378 | =item Time::Local |
379 | |
380 | The timelocal() and timegm() functions used to silently return bogus |
381 | results when the date exceeded the machine's integer range. They |
14218588 |
382 | now consistently croak() if the date falls in an unsupported range. |
06ef4121 |
383 | |
8fe0a5c4 |
384 | =item Win32 |
385 | |
386 | The error return value in list context has been changed for all functions |
14218588 |
387 | that return a list of values. Previously these functions returned a list |
388 | with a single element C<undef> if an error occurred. Now these functions |
389 | return the empty list in these situations. This applies to the following |
8fe0a5c4 |
390 | functions: |
391 | |
14218588 |
392 | Win32::FsType |
393 | Win32::GetOSVersion |
8fe0a5c4 |
394 | |
395 | The remaining functions are unchanged and continue to return C<undef> on |
396 | error even in list context. |
397 | |
398 | The Win32::SetLastError(ERROR) function has been added as a complement |
399 | to the Win32::GetLastError() function. |
400 | |
401 | The new Win32::GetFullPathName(FILENAME) returns the full absolute |
14218588 |
402 | pathname for FILENAME in scalar context. In list context it returns |
403 | a two-element list containing the fully qualified directory name and |
8fe0a5c4 |
404 | the filename. |
405 | |
9fe6733a |
406 | =item DBM Filters |
407 | |
408 | A new feature called "DBM Filters" has been added to all the |
14218588 |
409 | DBM modules--DB_File, GDBM_File, NDBM_File, ODBM_File, and SDBM_File. |
410 | DBM Filters add four new methods to each DBM module: |
9fe6733a |
411 | |
412 | filter_store_key |
413 | filter_store_value |
414 | filter_fetch_key |
415 | filter_fetch_value |
416 | |
14218588 |
417 | These can be used to filter key-value pairs before the pairs are |
9fe6733a |
418 | written to the database or just after they are read from the database. |
419 | See L<perldbmfilter> for further information. |
420 | |
b7d8191e |
421 | =back |
3e8c4fa0 |
422 | |
423 | =head2 Pragmata |
424 | |
14218588 |
425 | C<use utf8> to enable UTF-8 and Unicode support. |
9d73390d |
426 | |
43165c05 |
427 | C<use caller 'encoding'> allows modules to inherit pragmatic attributes |
428 | from the caller's context. C<encoding> is currently the only supported |
429 | attribute. |
9d73390d |
430 | |
431 | Lexical warnings pragma, C<use warning;>, to control optional warnings. |
6c67e1bb |
432 | |
14218588 |
433 | C<use filetest> to control the behaviour of filetests (C<-r> C<-w> ...). |
6c67e1bb |
434 | Currently only one subpragma implemented, "use filetest 'access';", |
14218588 |
435 | that enables the use of access(2) or equivalent to check |
6c67e1bb |
436 | permissions instead of using stat(2) as usual. This matters |
14218588 |
437 | in filesystems where there are ACLs (access control lists): the |
438 | stat(2) might lie, but access(2) knows better. |
6c67e1bb |
439 | |
ba8251e8 |
440 | =head1 Utility Changes |
441 | |
e02fdbd2 |
442 | Todo. |
443 | |
ba8251e8 |
444 | =head1 Documentation Changes |
445 | |
5fdc711f |
446 | =over 4 |
447 | |
448 | =item perlopentut.pod |
f8284313 |
449 | |
5fdc711f |
450 | A tutorial on using open() effectively. |
f8284313 |
451 | |
5fdc711f |
452 | =item perlreftut.pod |
453 | |
454 | A tutorial that introduces the essentials of references. |
455 | |
14218588 |
456 | =item perltootc.pod |
457 | |
458 | A tutorial on managing class data for object modules. |
459 | |
5fdc711f |
460 | =back |
e02fdbd2 |
461 | |
ba8251e8 |
462 | =head1 New Diagnostics |
463 | |
6b121555 |
464 | =item /%s/: Unrecognized escape \\%c passed through |
465 | |
466 | (W) You used a backslash-character combination which is not recognized |
7711098a |
467 | by Perl. This combination appears in an interpolated variable or a |
6b121555 |
468 | C<'>-delimited regular expression. |
469 | |
470 | =item Unrecognized escape \\%c passed through |
471 | |
472 | (W) You used a backslash-character combination which is not recognized |
473 | by Perl. |
e02fdbd2 |
474 | |
06eaf0bc |
475 | =item Missing command in piped open |
476 | |
477 | (W) You used the C<open(FH, "| command")> or C<open(FH, "command |")> |
478 | construction, but the command was missing or blank. |
479 | |
69794302 |
480 | =item defined(@array) is deprecated (and not really meaningful) |
481 | |
482 | (D) defined() is not usually useful on arrays because it checks for an |
483 | undefined I<scalar> value. If you want to see if the array is empty, |
484 | just use C<if (@array) { # not empty }> for example. |
485 | |
486 | =item defined(%hash) is deprecated (and not really meaningful) |
487 | |
488 | (D) defined() is not usually useful on hashes because it checks for an |
489 | undefined I<scalar> value. If you want to see if the hash is empty, |
490 | just use C<if (%hash) { # not empty }> for example. |
491 | |
ba8251e8 |
492 | =head1 Obsolete Diagnostics |
493 | |
e02fdbd2 |
494 | Todo. |
495 | |
04d420f9 |
496 | =head1 Configuration Changes |
497 | |
498 | You can use "Configure -Uinstallusrbinperl" which causes installperl |
499 | to skip installing perl also as /usr/bin/perl. This is useful if you |
500 | prefer not to modify /usr/bin for some reason or another but harmful |
555834d1 |
501 | because many scripts assume to find Perl in /usr/bin/perl. |
502 | |
503 | =head1 Configuration Changes |
504 | |
505 | You can use "Configure -Uinstallusrbinperl" which causes installperl |
506 | to skip installing perl also as /usr/bin/perl. This is useful if you |
507 | prefer not to modify /usr/bin for some reason or another but harmful |
04d420f9 |
508 | because many scripts assume to find Perl in /usr/bin/perl. |
509 | |
ba8251e8 |
510 | =head1 BUGS |
511 | |
512 | If you find what you think is a bug, you might check the headers of |
14218588 |
513 | articles recently posted to the comp.lang.perl.misc newsgroup. |
ba8251e8 |
514 | There may also be information at http://www.perl.com/perl/, the Perl |
515 | Home Page. |
516 | |
517 | If you believe you have an unreported bug, please run the B<perlbug> |
14218588 |
518 | program included with your release. Make sure to trim your bug down |
ba8251e8 |
519 | to a tiny but sufficient test case. Your bug report, along with the |
14218588 |
520 | output of C<perl -V>, will be sent off to perlbug@perl.com to be |
ba8251e8 |
521 | analysed by the Perl porting team. |
522 | |
523 | =head1 SEE ALSO |
524 | |
525 | The F<Changes> file for exhaustive details on what changed. |
526 | |
527 | The F<INSTALL> file for how to build Perl. |
528 | |
529 | The F<README> file for general stuff. |
530 | |
531 | The F<Artistic> and F<Copying> files for copyright information. |
532 | |
533 | =head1 HISTORY |
534 | |
535 | Written by Gurusamy Sarathy <F<gsar@umich.edu>>, with many contributions |
536 | from The Perl Porters. |
537 | |
538 | Send omissions or corrections to <F<perlbug@perl.com>>. |
539 | |
540 | =cut |