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diff --git a/Master/tlpkg/tlperl/lib/pods/perl572delta.pod b/Master/tlpkg/tlperl/lib/pods/perl572delta.pod deleted file mode 100644 index 67d091262e9..00000000000 --- a/Master/tlpkg/tlperl/lib/pods/perl572delta.pod +++ /dev/null @@ -1,831 +0,0 @@ -=head1 NAME - -perl572delta - what's new for perl v5.7.2 - -=head1 DESCRIPTION - -This document describes differences between the 5.7.1 release and the -5.7.2 release. - -(To view the differences between the 5.6.0 release and the 5.7.0 -release, see L<perl570delta>. To view the differences between the -5.7.0 release and the 5.7.1 release, see L<perl571delta>.) - -=head1 Security Vulnerability Closed - -(This change was already made in 5.7.0 but bears repeating here.) - -A security vulnerability affecting all Perl versions prior to 5.6.1 -was found in August 2000. The vulnerability does not affect default -installations and as far as is known affects only the Linux platform. - -You should upgrade your Perl to 5.6.1 as soon as possible. Patches -for earlier releases exist but using the patches require full -recompilation from the source code anyway, so 5.6.1 is your best -choice. - -See http://www.cpan.org/src/5.0/sperl-2000-08-05/sperl-2000-08-05.txt -for more information. - -=head1 Incompatible Changes - -=head2 64-bit platforms and malloc - -If your pointers are 64 bits wide, the Perl malloc is no more being -used because it simply does not work with 8-byte pointers. Also, -usually the system malloc on such platforms are much better optimized -for such large memory models than the Perl malloc. - -=head2 AIX Dynaloading - -The AIX dynaloading now uses in AIX releases 4.3 and newer the native -dlopen interface of AIX instead of the old emulated interface. This -change will probably break backward compatibility with compiled -modules. The change was made to make Perl more compliant with other -applications like modperl which are using the AIX native interface. - -=head2 Socket Extension Dynamic in VMS - -The Socket extension is now dynamically loaded instead of being -statically built in. This may or may not be a problem with ancient -TCP/IP stacks of VMS: we do not know since we weren't able to test -Perl in such configurations. - -=head2 Different Definition of the Unicode Character Classes \p{In...} - -As suggested by the Unicode consortium, the Unicode character classes -now prefer I<scripts> as opposed to I<blocks> (as defined by Unicode); -in Perl, when the C<\p{In....}> and the C<\p{In....}> regular expression -constructs are used. This has changed the definition of some of those -character classes. - -The difference between scripts and blocks is that scripts are the -glyphs used by a language or a group of languages, while the blocks -are more artificial groupings of 256 characters based on the Unicode -numbering. - -In general this change results in more inclusive Unicode character -classes, but changes to the other direction also do take place: -for example while the script C<Latin> includes all the Latin -characters and their various diacritic-adorned versions, it -does not include the various punctuation or digits (since they -are not solely C<Latin>). - -Changes in the character class semantics may have happened if a script -and a block happen to have the same name, for example C<Hebrew>. -In such cases the script wins and C<\p{InHebrew}> now means the script -definition of Hebrew. The block definition in still available, -though, by appending C<Block> to the name: C<\p{InHebrewBlock}> means -what C<\p{InHebrew}> meant in perl 5.6.0. For the full list -of affected character classes, see L<perlunicode/Blocks>. - -=head2 Deprecations - -The current user-visible implementation of pseudo-hashes (the weird -use of the first array element) is deprecated starting from Perl 5.8.0 -and will be removed in Perl 5.10.0, and the feature will be -implemented differently. Not only is the current interface rather -ugly, but the current implementation slows down normal array and hash -use quite noticeably. The C<fields> pragma interface will remain -available. - -The syntaxes C<< @a->[...] >> and C<< @h->{...} >> have now been deprecated. - -The suidperl is also considered to be too much a risk to continue -maintaining and the suidperl code is likely to be removed in a future -release. - -The C<package;> syntax (C<package> without an argument has been -deprecated. Its semantics were never that clear and its -implementation even less so. If you have used that feature to -disallow all but fully qualified variables, C<use strict;> instead. - -The chdir(undef) and chdir('') behaviors to match chdir() has been -deprecated. In future versions, chdir(undef) and chdir('') will -simply fail. - -=head1 Core Enhancements - -In general a lot of fixing has happened in the area of Perl's -understanding of numbers, both integer and floating point. Since in -many systems the standard number parsing functions like C<strtoul()> -and C<atof()> seem to have bugs, Perl tries to work around their -deficiencies. This results hopefully in more accurate numbers. - -=over 4 - -=item * - -The rules for allowing underscores (underbars) in numeric constants -have been relaxed and simplified: now you can have an underscore -B<between digits>. - -=item * - -GMAGIC (right-hand side magic) could in many cases such as string -concatenation be invoked too many times. - -=item * - -Lexicals I: lexicals outside an eval "" weren't resolved -correctly inside a subroutine definition inside the eval "" if they -were not already referenced in the top level of the eval""ed code. - -=item * - -Lexicals II: lexicals leaked at file scope into subroutines that -were declared before the lexicals. - -=item * - -Lvalue subroutines can now return C<undef> in list context. - -=item * - -The C<op_clear> and C<op_null> are now exported. - -=item * - -A new special regular expression variable has been introduced: -C<$^N>, which contains the most-recently closed group (submatch). - -=item * - -L<utime> now supports C<utime undef, undef, @files> to change the -file timestamps to the current time. - -=item * - -The Perl parser has been stress tested using both random input and -Markov chain input. - -=item * - -C<eval "v200"> now works. - -=item * - -VMS now works under PerlIO. - -=item * - -END blocks are now run even if you exit/die in a BEGIN block. -The execution of END blocks is now controlled by -PL_exit_flags & PERL_EXIT_DESTRUCT_END. This enables the new -behaviour for perl embedders. This will default in 5.10. See -L<perlembed>. - -=back - -=head1 Modules and Pragmata - -=head2 New Modules and Distributions - -=over 4 - -=item * - -L<Attribute::Handlers> - Simpler definition of attribute handlers - -=item * - -L<ExtUtils::Constant> - generate XS code to import C header constants - -=item * - -L<I18N::Langinfo> - query locale information - -=item * - -L<I18N::LangTags> - functions for dealing with RFC3066-style language tags - -=item * - -L<libnet> - a collection of perl5 modules related to network programming - -Perl installation leaves libnet unconfigured, use F<libnetcfg> to configure. - -=item * - -L<List::Util> - selection of general-utility list subroutines - -=item * - -L<Locale::Maketext> - framework for localization - -=item * - -L<Memoize> - Make your functions faster by trading space for time - -=item * - -L<NEXT> - pseudo-class for method redispatch - -=item * - -L<Scalar::Util> - selection of general-utility scalar subroutines - -=item * - -L<Test::More> - yet another framework for writing test scripts - -=item * - -L<Test::Simple> - Basic utilities for writing tests - -=item * - -L<Time::HiRes> - high resolution ualarm, usleep, and gettimeofday - -=item * - -L<Time::Piece> - Object Oriented time objects - -(Previously known as L<Time::Object>.) - -=item * - -L<Time::Seconds> - a simple API to convert seconds to other date values - -=item * - -L<UnicodeCD> - Unicode Character Database - -=back - -=head2 Updated And Improved Modules and Pragmata - -=over 4 - -=item * - -L<B::Deparse> module has been significantly enhanced. It now -can deparse almost all of the standard test suite (so that the -tests still succeed). There is a make target "test.deparse" -for trying this out. - -=item * - -L<Class::Struct> now assigns the array/hash element if the accessor -is called with an array/hash element as the B<sole> argument. - -=item * - -L<Cwd> extension is now (even) faster. - -=item * - -L<DB_File> extension has been updated to version 1.77. - -=item * - -L<Fcntl>, L<Socket>, and L<Sys::Syslog> have been rewritten to use the -new-style constant dispatch section (see L<ExtUtils::Constant>). - -=item * - -L<File::Find> is now (again) reentrant. It also has been made -more portable. - -=item * - -L<File::Glob> now supports C<GLOB_LIMIT> constant to limit the -size of the returned list of filenames. - -=item * - -L<IO::Socket::INET> now supports C<LocalPort> of zero (usually meaning -that the operating system will make one up.) - -=item * - -The L<vars> pragma now supports declaring fully qualified variables. -(Something that C<our()> does not and will not support.) - -=back - -=head1 Utility Changes - -=over 4 - -=item * - -The F<emacs/e2ctags.pl> is now much faster. - -=item * - -L<h2ph> now supports C trigraphs. - -=item * - -L<h2xs> uses the new L<ExtUtils::Constant> module which will affect -newly created extensions that define constants. Since the new code is -more correct (if you have two constants where the first one is a -prefix of the second one, the first constant B<never> gets defined), -less lossy (it uses integers for integer constant, as opposed to the -old code that used floating point numbers even for integer constants), -and slightly faster, you might want to consider regenerating your -extension code (the new scheme makes regenerating easy). -L<h2xs> now also supports C trigraphs. - -=item * - -L<libnetcfg> has been added to configure the libnet. - -=item * - -The F<Pod::Html> (and thusly L<pod2html>) now allows specifying -a cache directory. - -=back - -=head1 New Documentation - -=over 4 - -=item * - -L<Locale::Maketext::TPJ13> is an article about software localization, -originally published in The Perl Journal #13, republished here with -kind permission. - -=item * - -More README.$PLATFORM files have been converted into pod, which also -means that they also be installed as perl$PLATFORM documentation -files. The new files are L<perlapollo>, L<perlbeos>, L<perldgux>, -L<perlhurd>, L<perlmint>, L<perlnetware>, L<perlplan9>, L<perlqnx>, -and L<perltru64>. - -=item * - -The F<Todo> and F<Todo-5.6> files have been merged into L<perltodo>. - -=item * - -Use of the F<gprof> tool to profile Perl has been documented in -L<perlhack>. There is a make target "perl.gprof" for generating a -gprofiled Perl executable. - -=back - -=head1 Installation and Configuration Improvements - -=head2 New Or Improved Platforms - -=over 4 - -=item * - -AIX should now work better with gcc, threads, and 64-bitness. Also the -long doubles support in AIX should be better now. See L<perlaix>. - -=item * - -AtheOS ( http://www.atheos.cx/ ) is a new platform. - -=item * - -DG/UX platform now supports the 5.005-style threads. See L<perldgux>. - -=item * - -DYNIX/ptx platform (a.k.a. dynixptx) is supported at or near osvers 4.5.2. - -=item * - -Several Mac OS (Classic) portability patches have been applied. We -hope to get a fully working port by 5.8.0. (The remaining problems -relate to the changed IO model of Perl.) See L<perlmacos>. - -=item * - -Mac OS X (or Darwin) should now be able to build Perl even on HFS+ -filesystems. (The case-insensitivity confused the Perl build process.) - -=item * - -NetWare from Novell is now supported. See L<perlnetware>. - -=item * - -The Amdahl UTS Unix mainframe platform is now supported. - -=back - -=head2 Generic Improvements - -=over 4 - -=item * - -In AFS installations one can configure the root of the AFS to be -somewhere else than the default F</afs> by using the Configure -parameter C<-Dafsroot=/some/where/else>. - -=item * - -The version of Berkeley DB used when the Perl (and, presumably, the -DB_File extension) was built is now available as -C<@Config{qw(db_version_major db_version_minor db_version_patch)}> -from Perl and as C<DB_VERSION_MAJOR_CFG DB_VERSION_MINOR_CFG -DB_VERSION_PATCH_CFG> from C. - -=item * - -The Thread extension is now not built at all under ithreads -(C<Configure -Duseithreads>) because it wouldn't work anyway (the -Thread extension requires being Configured with C<-Duse5005threads>). - -=item * - -The C<B::Deparse> compiler backend has been so significantly improved -that almost the whole Perl test suite passes after being deparsed. A -make target has been added to help in further testing: C<make test.deparse>. - -=back - -=head1 Selected Bug Fixes - -=over 5 - -=item * - -The autouse pragma didn't work for Multi::Part::Function::Names. - -=item * - -The behaviour of non-decimal but numeric string constants such as -"0x23" was platform-dependent: in some platforms that was seen as 35, -in some as 0, in some as a floating point number (don't ask). This -was caused by Perl using the operating system libraries in a situation -where the result of the string to number conversion is undefined: now -Perl consistently handles such strings as zero in numeric contexts. - -=item * - -L<dprofpp> -R didn't work. - -=item * - -PERL5OPT with embedded spaces didn't work. - -=item * - -L<Sys::Syslog> ignored the C<LOG_AUTH> constant. - -=back - -=head2 Platform Specific Changes and Fixes - -=over 4 - -=item * - -Some versions of glibc have a broken modfl(). This affects builds -with C<-Duselongdouble>. This version of Perl detects this brokenness -and has a workaround for it. The glibc release 2.2.2 is known to have -fixed the modfl() bug. - -=back - -=head1 New or Changed Diagnostics - -=over 4 - -=item * - -In the regular expression diagnostics the C<E<lt>E<lt> HERE> marker -introduced in 5.7.0 has been changed to be C<E<lt>-- HERE> since too -many people found the C<E<lt>E<lt>> to be too similar to here-document -starters. - -=item * - -If you try to L<perlfunc/pack> a number less than 0 or larger than 255 -using the C<"C"> format you will get an optional warning. Similarly -for the C<"c"> format and a number less than -128 or more than 127. - -=item * - -Certain regex modifiers such as C<(?o)> make sense only if applied to -the entire regex. You will an optional warning if you try to do otherwise. - -=item * - -Using arrays or hashes as references (e.g. C<< %foo->{bar} >> has been -deprecated for a while. Now you will get an optional warning. - -=back - -=head1 Source Code Enhancements - -=head2 MAGIC constants - -The MAGIC constants (e.g. C<'P'>) have been macrofied -(e.g. C<PERL_MAGIC_TIED>) for better source code readability -and maintainability. - -=head2 Better commented code - -F<perly.c>, F<sv.c>, and F<sv.h> have now been extensively commented. - -=head2 Regex pre-/post-compilation items matched up - -The regex compiler now maintains a structure that identifies nodes in -the compiled bytecode with the corresponding syntactic features of the -original regex expression. The information is attached to the new -C<offsets> member of the C<struct regexp>. See L<perldebguts> for more -complete information. - -=head2 gcc -Wall - -The C code has been made much more C<gcc -Wall> clean. Some warning -messages still remain, though, so if you are compiling with gcc you -will see some warnings about dubious practices. The warnings are -being worked on. - -=head1 New Tests - -Several new tests have been added, especially for the F<lib> subsection. - -The tests are now reported in a different order than in earlier Perls. -(This happens because the test scripts from under t/lib have been moved -to be closer to the library/extension they are testing.) - -=head1 Known Problems - -Note that unlike other sections in this document (which describe -changes since 5.7.0) this section is cumulative containing known -problems for all the 5.7 releases. - -=head2 AIX - -=over 4 - -=item * - -In AIX 4.2 Perl extensions that use C++ functions that use statics -may have problems in that the statics are not getting initialized. -In newer AIX releases this has been solved by linking Perl with -the libC_r library, but unfortunately in AIX 4.2 the said library -has an obscure bug where the various functions related to time -(such as time() and gettimeofday()) return broken values, and -therefore in AIX 4.2 Perl is not linked against the libC_r. - -=item * - -vac 5.0.0.0 May Produce Buggy Code For Perl - -The AIX C compiler vac version 5.0.0.0 may produce buggy code, -resulting in few random tests failing, but when the failing tests -are run by hand, they succeed. We suggest upgrading to at least -vac version 5.0.1.0, that has been known to compile Perl correctly. -"lslpp -L|grep vac.C" will tell you the vac version. - -=back - -=head2 Amiga Perl Invoking Mystery - -One cannot call Perl using the C<volume:> syntax, that is, C<perl -v> -works, but for example C<bin:perl -v> doesn't. The exact reason is -known but the current suspect is the F<ixemul> library. - -=head2 lib/ftmp-security tests warn 'system possibly insecure' - -Don't panic. Read INSTALL 'make test' section instead. - -=head2 Cygwin intermittent failures of lib/Memoize/t/expire_file 11 and 12 - -The subtests 11 and 12 sometimes fail and sometimes work. - -=head2 HP-UX lib/io_multihomed Fails When LP64-Configured - -The lib/io_multihomed test may hang in HP-UX if Perl has been -configured to be 64-bit. Because other 64-bit platforms do not hang in -this test, HP-UX is suspect. All other tests pass in 64-bit HP-UX. The -test attempts to create and connect to "multihomed" sockets (sockets -which have multiple IP addresses). - -=head2 HP-UX lib/posix Subtest 9 Fails When LP64-Configured - -If perl is configured with -Duse64bitall, the successful result of the -subtest 10 of lib/posix may arrive before the successful result of the -subtest 9, which confuses the test harness so much that it thinks the -subtest 9 failed. - -=head2 Linux With Sfio Fails op/misc Test 48 - -No known fix. - -=head2 OS/390 - -OS/390 has rather many test failures but the situation is actually -better than it was in 5.6.0, it's just that so many new modules and -tests have been added. - - Failed Test Stat Wstat Total Fail Failed List of Failed - ----------------------------------------------------------------------------- - ../ext/B/Deparse.t 14 1 7.14% 14 - ../ext/B/Showlex.t 1 1 100.00% 1 - ../ext/Encode/Encode/Tcl.t 610 13 2.13% 592 594 596 598 - 600 602 604-610 - ../ext/IO/lib/IO/t/io_unix.t 113 28928 5 3 60.00% 3-5 - ../ext/POSIX/POSIX.t 29 1 3.45% 14 - ../ext/Storable/t/lock.t 255 65280 5 3 60.00% 3-5 - ../lib/locale.t 129 33024 117 19 16.24% 99-117 - ../lib/warnings.t 434 1 0.23% 75 - ../lib/ExtUtils.t 27 1 3.70% 25 - ../lib/Math/BigInt/t/bigintpm.t 1190 1 0.08% 1145 - ../lib/Unicode/UCD.t 81 48 59.26% 1-16 49-64 66-81 - ../lib/User/pwent.t 9 1 11.11% 4 - op/pat.t 660 6 0.91% 242-243 424-425 - 626-627 - op/split.t 0 9 ?? ?? % ?? - op/taint.t 174 3 1.72% 156 162 168 - op/tr.t 70 3 4.29% 50 58-59 - Failed 16/422 test scripts, 96.21% okay. 105/23251 subtests failed, 99.55% okay. - -=head2 op/sprintf tests 129 and 130 - -The op/sprintf tests 129 and 130 are known to fail on some platforms. -Examples include any platform using sfio, and Compaq/Tandem's NonStop-UX. -The failing platforms do not comply with the ANSI C Standard, line -19ff on page 134 of ANSI X3.159 1989 to be exact. (They produce -something other than "1" and "-1" when formatting 0.6 and -0.6 using -the printf format "%.0f", most often they produce "0" and "-0".) - -=head2 Failure of Thread tests - -B<Note that support for 5.005-style threading remains experimental.> - -The following tests are known to fail due to fundamental problems in -the 5.005 threading implementation. These are not new failures--Perl -5.005_0x has the same bugs, but didn't have these tests. - - lib/autouse.t 4 - t/lib/thr5005.t 19-20 - -=head2 UNICOS - -=over 4 - -=item * - -ext/POSIX/sigaction subtests 6 and 13 may fail. - -=item * - -lib/ExtUtils may spuriously claim that subtest 28 failed, -which is interesting since the test only has 27 tests. - -=item * - -Numerous numerical test failures - - op/numconvert 209,210,217,218 - op/override 7 - ext/Time/HiRes/HiRes 9 - lib/Math/BigInt/t/bigintpm 1145 - lib/Math/Trig 25 - -These tests fail because of yet unresolved floating point inaccuracies. - -=back - -=head2 UTS - -There are a few known test failures, see L<perluts>. - -=head2 VMS - -Rather many tests are failing in VMS but that actually more tests -succeed in VMS than they used to, it's just that there are many, -many more tests than there used to be. - -Here are the known failures from some compiler/platform combinations. - -DEC C V5.3-006 on OpenVMS VAX V6.2 - - [-.ext.list.util.t]tainted..............FAILED on test 3 - [-.ext.posix]sigaction..................FAILED on test 7 - [-.ext.time.hires]hires.................FAILED on test 14 - [-.lib.file.find]taint..................FAILED on test 17 - [-.lib.math.bigint.t]bigintpm...........FAILED on test 1183 - [-.lib.test.simple.t]exit...............FAILED on test 1 - [.lib]vmsish............................FAILED on test 13 - [.op]sprintf............................FAILED on test 12 - Failed 8/399 tests, 91.23% okay. - -DEC C V6.0-001 on OpenVMS Alpha V7.2-1 and -Compaq C V6.2-008 on OpenVMS Alpha V7.1 - - [-.ext.list.util.t]tainted..............FAILED on test 3 - [-.lib.file.find]taint..................FAILED on test 17 - [-.lib.test.simple.t]exit...............FAILED on test 1 - [.lib]vmsish............................FAILED on test 13 - Failed 4/399 tests, 92.48% okay. - -Compaq C V6.4-005 on OpenVMS Alpha 7.2.1 - - [-.ext.b]showlex........................FAILED on test 1 - [-.ext.list.util.t]tainted..............FAILED on test 3 - [-.lib.file.find]taint..................FAILED on test 17 - [-.lib.test.simple.t]exit...............FAILED on test 1 - [.lib]vmsish............................FAILED on test 13 - [.op]misc...............................FAILED on test 49 - Failed 6/401 tests, 92.77% okay. - -=head2 Win32 - -In multi-CPU boxes there are some problems with the I/O buffering: -some output may appear twice. - -=head2 Localising a Tied Variable Leaks Memory - - use Tie::Hash; - tie my %tie_hash => 'Tie::StdHash'; - - ... - - local($tie_hash{Foo}) = 1; # leaks - -Code like the above is known to leak memory every time the local() -is executed. - -=head2 Self-tying of Arrays and Hashes Is Forbidden - -Self-tying of arrays and hashes is broken in rather deep and -hard-to-fix ways. As a stop-gap measure to avoid people from getting -frustrated at the mysterious results (core dumps, most often) it is -for now forbidden (you will get a fatal error even from an attempt). - -=head2 Variable Attributes are not Currently Usable for Tying - -This limitation will hopefully be fixed in future. (Subroutine -attributes work fine for tying, see L<Attribute::Handlers>). - -=head2 Building Extensions Can Fail Because Of Largefiles - -Some extensions like mod_perl are known to have issues with -`largefiles', a change brought by Perl 5.6.0 in which file offsets -default to 64 bits wide, where supported. Modules may fail to compile -at all or compile and work incorrectly. Currently there is no good -solution for the problem, but Configure now provides appropriate -non-largefile ccflags, ldflags, libswanted, and libs in the %Config -hash (e.g., $Config{ccflags_nolargefiles}) so the extensions that are -having problems can try configuring themselves without the -largefileness. This is admittedly not a clean solution, and the -solution may not even work at all. One potential failure is whether -one can (or, if one can, whether it's a good idea) link together at -all binaries with different ideas about file offsets, all this is -platform-dependent. - -=head2 The Compiler Suite Is Still Experimental - -The compiler suite is slowly getting better but is nowhere near -working order yet. - -=head2 The Long Double Support is Still Experimental - -The ability to configure Perl's numbers to use "long doubles", -floating point numbers of hopefully better accuracy, is still -experimental. The implementations of long doubles are not yet -widespread and the existing implementations are not quite mature -or standardised, therefore trying to support them is a rare -and moving target. The gain of more precision may also be offset -by slowdown in computations (more bits to move around, and the -operations are more likely to be executed by less optimised -libraries). - -=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://bugs.perl.org/ There may also be -information at http://www.perl.com/perl/ , 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. - -=head1 SEE ALSO - -The F<Changes> file for 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. - -=head1 HISTORY - -Written by Jarkko Hietaniemi <F<jhi@iki.fi>>, with many contributions -from The Perl Porters and Perl Users submitting feedback and patches. - -Send omissions or corrections to <F<perlbug@perl.org>>. - -=cut |