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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 469 by ph10, Mon Oct 19 14:38:48 2009 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
4  Release 7.0 23-Nov-06  Release 8.00 19-Oct-09
5    ----------------------
7    Bugs have been fixed in the library and in pcregrep. There are also some
8    enhancements. Restrictions on patterns used for partial matching have been
9    removed, extra information is given for partial matches, the partial matching
10    process has been improved, and an option to make a partial match override a
11    full match is available. The "study" process has been enhanced by finding a
12    lower bound matching length. Groups with duplicate numbers may now have
13    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
14    different names. The documentation has been revised to reflect these changes.
15    The version number has been expanded to 3 digits as it is clear that the rate
16    of change is not slowing down.
19    Release 7.9 11-Apr-09
20    ---------------------
22    Mostly bugfixes and tidies with just a couple of minor functional additions.
25    Release 7.8 05-Sep-08
26    ---------------------
28    More bug fixes, plus a performance improvement in Unicode character property
29    lookup.
32    Release 7.7 07-May-08
33    ---------------------
35    This is once again mainly a bug-fix release, but there are a couple of new
36    features.
39    Release 7.6 28-Jan-08
40    ---------------------
42    The main reason for having this release so soon after 7.5 is because it fixes a
43    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
44    addition, the CMake configuration files have been brought up to date.
47    Release 7.5 10-Jan-08
48    ---------------------
50    This is mainly a bug-fix release. However the ability to link pcregrep with
51    libz or libbz2 and the ability to link pcretest with libreadline have been
52    added. Also the --line-offsets and --file-offsets options were added to
53    pcregrep.
56    Release 7.4 21-Sep-07
57    ---------------------
59    The only change of specification is the addition of options to control whether
60    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
61    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
62    relocations needed in a shared library. There have also been some documentation
63    updates, in particular, some more information about using CMake to build PCRE
64    has been added to the NON-UNIX-USE file.
67    Release 7.3 28-Aug-07
68    ---------------------
70    Most changes are bug fixes. Some that are not:
72    1. There is some support for Perl 5.10's experimental "backtracking control
73       verbs" such as (*PRUNE).
75    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
76       restrictive in the strings it accepts.
78    3. Checking for potential integer overflow has been made more dynamic, and as a
79       consequence there is no longer a hard limit on the size of a subpattern that
80       has a limited repeat count.
82    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
83       no longer advance by two characters instead of one when an unanchored match
84       fails at CRLF if there are explicit CR or LF matches within the pattern.
85       This gets rid of some anomalous effects that previously occurred.
87    5. Some PCRE-specific settings for varying the newline options at the start of
88       a pattern have been added.
91    Release 7.2 19-Jun-07
92    ---------------------
94    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
95    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
96    and \V).
98    Correction to the notes for 7.1: the note about shared libraries for Windows is
99    wrong. Previously, three libraries were built, but each could function
100    independently. For example, the pcreposix library also included all the
101    functions from the basic pcre library. The change is that the three libraries
102    are no longer independent. They are like the Unix libraries. To use the
103    pcreposix functions, for example, you need to link with both the pcreposix and
104    the basic pcre library.
106    Some more features from Perl 5.10 have been added:
108      (?-n) and (?+n) relative references for recursion and subroutines.
110      (?(-n) and (?(+n) relative references as conditions.
112      \k{name} and \g{name} are synonyms for \k<name>.
114      \K to reset the start of the matched string; for example, (foo)\Kbar
115      matches bar preceded by foo, but only sets bar as the matched string.
117      (?| introduces a group where the capturing parentheses in each alternative
118      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
119      parentheses number 1 in both cases.
121      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
124    Release 7.1 24-Apr-07
125    ---------------------
127    There is only one new feature in this release: a linebreak setting of
128    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
129    recognizes only CRLF, CR, and LF as linebreaks.
131    A few bugs are fixed (see ChangeLog for details), but the major change is a
132    complete re-implementation of the build system. This now has full Autotools
133    support and so is now "standard" in some sense. It should help with compiling
134    PCRE in a wide variety of environments.
136    NOTE: when building shared libraries for Windows, three dlls are now built,
137    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
138    included in a single dll.
140    Another important change is that the dftables auxiliary program is no longer
141    compiled and run at "make" time by default. Instead, a default set of character
142    tables (assuming ASCII coding) is used. If you want to use dftables to generate
143    the character tables as previously, add --enable-rebuild-chartables to the
144    "configure" command. You must do this if you are compiling PCRE to run on a
145    system that uses EBCDIC code.
147    There is a discussion about character tables in the README file. The default is
148    not to use dftables so that that there is no problem when cross-compiling.
151    Release 7.0 19-Dec-06
152  ---------------------  ---------------------
154  This release has a new major number because there have been some internal  This release has a new major number because there have been some internal

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