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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 415 by ph10, Sat Apr 11 14:22:17 2009 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4  Release 7.0 23-Nov-06  Release 7.9 11-Apr-09
5    ---------------------
6    
7    Mostly bugfixes and tidies with just a couple of minor functional additions.
8    
9    
10    Release 7.8 05-Sep-08
11    ---------------------
12    
13    More bug fixes, plus a performance improvement in Unicode character property
14    lookup.
15    
16    
17    Release 7.7 07-May-08
18    ---------------------
19    
20    This is once again mainly a bug-fix release, but there are a couple of new
21    features.
22    
23    
24    Release 7.6 28-Jan-08
25    ---------------------
26    
27    The main reason for having this release so soon after 7.5 is because it fixes a
28    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
29    addition, the CMake configuration files have been brought up to date.
30    
31    
32    Release 7.5 10-Jan-08
33    ---------------------
34    
35    This is mainly a bug-fix release. However the ability to link pcregrep with
36    libz or libbz2 and the ability to link pcretest with libreadline have been
37    added. Also the --line-offsets and --file-offsets options were added to
38    pcregrep.
39    
40    
41    Release 7.4 21-Sep-07
42    ---------------------
43    
44    The only change of specification is the addition of options to control whether
45    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
46    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
47    relocations needed in a shared library. There have also been some documentation
48    updates, in particular, some more information about using CMake to build PCRE
49    has been added to the NON-UNIX-USE file.
50    
51    
52    Release 7.3 28-Aug-07
53    ---------------------
54    
55    Most changes are bug fixes. Some that are not:
56    
57    1. There is some support for Perl 5.10's experimental "backtracking control
58       verbs" such as (*PRUNE).
59    
60    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
61       restrictive in the strings it accepts.
62    
63    3. Checking for potential integer overflow has been made more dynamic, and as a
64       consequence there is no longer a hard limit on the size of a subpattern that
65       has a limited repeat count.
66    
67    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
68       no longer advance by two characters instead of one when an unanchored match
69       fails at CRLF if there are explicit CR or LF matches within the pattern.
70       This gets rid of some anomalous effects that previously occurred.
71    
72    5. Some PCRE-specific settings for varying the newline options at the start of
73       a pattern have been added.
74    
75    
76    Release 7.2 19-Jun-07
77    ---------------------
78    
79    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
80    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
81    and \V).
82    
83    Correction to the notes for 7.1: the note about shared libraries for Windows is
84    wrong. Previously, three libraries were built, but each could function
85    independently. For example, the pcreposix library also included all the
86    functions from the basic pcre library. The change is that the three libraries
87    are no longer independent. They are like the Unix libraries. To use the
88    pcreposix functions, for example, you need to link with both the pcreposix and
89    the basic pcre library.
90    
91    Some more features from Perl 5.10 have been added:
92    
93      (?-n) and (?+n) relative references for recursion and subroutines.
94    
95      (?(-n) and (?(+n) relative references as conditions.
96    
97      \k{name} and \g{name} are synonyms for \k<name>.
98    
99      \K to reset the start of the matched string; for example, (foo)\Kbar
100      matches bar preceded by foo, but only sets bar as the matched string.
101    
102      (?| introduces a group where the capturing parentheses in each alternative
103      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
104      parentheses number 1 in both cases.
105    
106      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
107    
108    
109    Release 7.1 24-Apr-07
110    ---------------------
111    
112    There is only one new feature in this release: a linebreak setting of
113    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
114    recognizes only CRLF, CR, and LF as linebreaks.
115    
116    A few bugs are fixed (see ChangeLog for details), but the major change is a
117    complete re-implementation of the build system. This now has full Autotools
118    support and so is now "standard" in some sense. It should help with compiling
119    PCRE in a wide variety of environments.
120    
121    NOTE: when building shared libraries for Windows, three dlls are now built,
122    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
123    included in a single dll.
124    
125    Another important change is that the dftables auxiliary program is no longer
126    compiled and run at "make" time by default. Instead, a default set of character
127    tables (assuming ASCII coding) is used. If you want to use dftables to generate
128    the character tables as previously, add --enable-rebuild-chartables to the
129    "configure" command. You must do this if you are compiling PCRE to run on a
130    system that uses EBCDIC code.
131    
132    There is a discussion about character tables in the README file. The default is
133    not to use dftables so that that there is no problem when cross-compiling.
134    
135    
136    Release 7.0 19-Dec-06
137  ---------------------  ---------------------
138    
139  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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