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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4    Release 8.12 15-Jan-2011
5    ------------------------
6    
7    This release fixes some bugs in pcregrep, one of which caused the tests to fail
8    on 64-bit big-endian systems. There are no changes to the code of the library.
9    
10    
11    Release 8.11 10-Dec-2010
12    ------------------------
13    
14    A number of bugs in the library and in pcregrep have been fixed. As always, see
15    ChangeLog for details. The following are the non-bug-fix changes:
16    
17    . Added --match-limit and --recursion-limit to pcregrep.
18    
19    . Added an optional parentheses number to the -o and --only-matching options
20      of pcregrep.
21    
22    . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
23      \B.
24    
25    . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
26      bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
27    
28    . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
29      START_OPTIMIZE option, which is now allowed at compile time
30    
31    
32    Release 8.10 25-Jun-2010
33    ------------------------
34    
35    There are two major additions: support for (*MARK) and friends, and the option
36    PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
37    opposites) so that they make use of Unicode properties. There are also a number
38    of lesser new features, and several bugs have been fixed. A new option,
39    --line-buffered, has been added to pcregrep, for use when it is connected to
40    pipes.
41    
42    
43    Release 8.02 19-Mar-2010
44    ------------------------
45    
46    Another bug-fix release.
47    
48    
49    Release 8.01 19-Jan-2010
50    ------------------------
51    
52    This is a bug-fix release. Several bugs in the code itself and some bugs and
53    infelicities in the build system have been fixed.
54    
55    
56    Release 8.00 19-Oct-09
57    ----------------------
58    
59    Bugs have been fixed in the library and in pcregrep. There are also some
60    enhancements. Restrictions on patterns used for partial matching have been
61    removed, extra information is given for partial matches, the partial matching
62    process has been improved, and an option to make a partial match override a
63    full match is available. The "study" process has been enhanced by finding a
64    lower bound matching length. Groups with duplicate numbers may now have
65    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
66    different names. The documentation has been revised to reflect these changes.
67    The version number has been expanded to 3 digits as it is clear that the rate
68    of change is not slowing down.
69    
70    
71    Release 7.9 11-Apr-09
72    ---------------------
73    
74    Mostly bugfixes and tidies with just a couple of minor functional additions.
75    
76    
77    Release 7.8 05-Sep-08
78    ---------------------
79    
80    More bug fixes, plus a performance improvement in Unicode character property
81    lookup.
82    
83    
84    Release 7.7 07-May-08
85    ---------------------
86    
87    This is once again mainly a bug-fix release, but there are a couple of new
88    features.
89    
90  Release 7.1 12-Mar-07  
91    Release 7.6 28-Jan-08
92    ---------------------
93    
94    The main reason for having this release so soon after 7.5 is because it fixes a
95    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
96    addition, the CMake configuration files have been brought up to date.
97    
98    
99    Release 7.5 10-Jan-08
100    ---------------------
101    
102    This is mainly a bug-fix release. However the ability to link pcregrep with
103    libz or libbz2 and the ability to link pcretest with libreadline have been
104    added. Also the --line-offsets and --file-offsets options were added to
105    pcregrep.
106    
107    
108    Release 7.4 21-Sep-07
109    ---------------------
110    
111    The only change of specification is the addition of options to control whether
112    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
113    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
114    relocations needed in a shared library. There have also been some documentation
115    updates, in particular, some more information about using CMake to build PCRE
116    has been added to the NON-UNIX-USE file.
117    
118    
119    Release 7.3 28-Aug-07
120    ---------------------
121    
122    Most changes are bug fixes. Some that are not:
123    
124    1. There is some support for Perl 5.10's experimental "backtracking control
125       verbs" such as (*PRUNE).
126    
127    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
128       restrictive in the strings it accepts.
129    
130    3. Checking for potential integer overflow has been made more dynamic, and as a
131       consequence there is no longer a hard limit on the size of a subpattern that
132       has a limited repeat count.
133    
134    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
135       no longer advance by two characters instead of one when an unanchored match
136       fails at CRLF if there are explicit CR or LF matches within the pattern.
137       This gets rid of some anomalous effects that previously occurred.
138    
139    5. Some PCRE-specific settings for varying the newline options at the start of
140       a pattern have been added.
141    
142    
143    Release 7.2 19-Jun-07
144  ---------------------  ---------------------
145    
146  There are no new features in this release. A few bugs are fixed (see ChangeLog  WARNING: saved patterns that were compiled by earlier versions of PCRE must be
147  for details), but the major change is a complete re-implementation of the build  recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
148  system. This now has full Autotools support and so is now "standard" in some  and \V).
149  sense. It should help with compiling PCRE in a wide variety of environments.  
150    Correction to the notes for 7.1: the note about shared libraries for Windows is
151    wrong. Previously, three libraries were built, but each could function
152    independently. For example, the pcreposix library also included all the
153    functions from the basic pcre library. The change is that the three libraries
154    are no longer independent. They are like the Unix libraries. To use the
155    pcreposix functions, for example, you need to link with both the pcreposix and
156    the basic pcre library.
157    
158    Some more features from Perl 5.10 have been added:
159    
160      (?-n) and (?+n) relative references for recursion and subroutines.
161    
162      (?(-n) and (?(+n) relative references as conditions.
163    
164      \k{name} and \g{name} are synonyms for \k<name>.
165    
166      \K to reset the start of the matched string; for example, (foo)\Kbar
167      matches bar preceded by foo, but only sets bar as the matched string.
168    
169      (?| introduces a group where the capturing parentheses in each alternative
170      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
171      parentheses number 1 in both cases.
172    
173      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
174    
175    
176    Release 7.1 24-Apr-07
177    ---------------------
178    
179    There is only one new feature in this release: a linebreak setting of
180    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
181    recognizes only CRLF, CR, and LF as linebreaks.
182    
183    A few bugs are fixed (see ChangeLog for details), but the major change is a
184    complete re-implementation of the build system. This now has full Autotools
185    support and so is now "standard" in some sense. It should help with compiling
186    PCRE in a wide variety of environments.
187    
188    NOTE: when building shared libraries for Windows, three dlls are now built,
189    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
190    included in a single dll.
191    
192    Another important change is that the dftables auxiliary program is no longer
193    compiled and run at "make" time by default. Instead, a default set of character
194    tables (assuming ASCII coding) is used. If you want to use dftables to generate
195    the character tables as previously, add --enable-rebuild-chartables to the
196    "configure" command. You must do this if you are compiling PCRE to run on a
197    system that uses EBCDIC code.
198    
199    There is a discussion about character tables in the README file. The default is
200    not to use dftables so that that there is no problem when cross-compiling.
201    
202    
203  Release 7.0 19-Dec-06  Release 7.0 19-Dec-06

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