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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 374 by ph10, Fri Sep 5 16:42:28 2008 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4  Release 7.0 23-Nov-06  
5    Release 7.8 05-Sep-08
6    ---------------------
7    
8    More bug fixes, plus a performance improvement in Unicode character property
9    lookup.
10    
11    
12    Release 7.7 07-May-08
13    ---------------------
14    
15    This is once again mainly a bug-fix release, but there are a couple of new
16    features.
17    
18    
19    Release 7.6 28-Jan-08
20    ---------------------
21    
22    The main reason for having this release so soon after 7.5 is because it fixes a
23    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
24    addition, the CMake configuration files have been brought up to date.
25    
26    
27    Release 7.5 10-Jan-08
28    ---------------------
29    
30    This is mainly a bug-fix release. However the ability to link pcregrep with
31    libz or libbz2 and the ability to link pcretest with libreadline have been
32    added. Also the --line-offsets and --file-offsets options were added to
33    pcregrep.
34    
35    
36    Release 7.4 21-Sep-07
37    ---------------------
38    
39    The only change of specification is the addition of options to control whether
40    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
41    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
42    relocations needed in a shared library. There have also been some documentation
43    updates, in particular, some more information about using CMake to build PCRE
44    has been added to the NON-UNIX-USE file.
45    
46    
47    Release 7.3 28-Aug-07
48    ---------------------
49    
50    Most changes are bug fixes. Some that are not:
51    
52    1. There is some support for Perl 5.10's experimental "backtracking control
53       verbs" such as (*PRUNE).
54    
55    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
56       restrictive in the strings it accepts.
57    
58    3. Checking for potential integer overflow has been made more dynamic, and as a
59       consequence there is no longer a hard limit on the size of a subpattern that
60       has a limited repeat count.
61    
62    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
63       no longer advance by two characters instead of one when an unanchored match
64       fails at CRLF if there are explicit CR or LF matches within the pattern.
65       This gets rid of some anomalous effects that previously occurred.
66    
67    5. Some PCRE-specific settings for varying the newline options at the start of
68       a pattern have been added.
69    
70    
71    Release 7.2 19-Jun-07
72    ---------------------
73    
74    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
75    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
76    and \V).
77    
78    Correction to the notes for 7.1: the note about shared libraries for Windows is
79    wrong. Previously, three libraries were built, but each could function
80    independently. For example, the pcreposix library also included all the
81    functions from the basic pcre library. The change is that the three libraries
82    are no longer independent. They are like the Unix libraries. To use the
83    pcreposix functions, for example, you need to link with both the pcreposix and
84    the basic pcre library.
85    
86    Some more features from Perl 5.10 have been added:
87    
88      (?-n) and (?+n) relative references for recursion and subroutines.
89    
90      (?(-n) and (?(+n) relative references as conditions.
91    
92      \k{name} and \g{name} are synonyms for \k<name>.
93    
94      \K to reset the start of the matched string; for example, (foo)\Kbar
95      matches bar preceded by foo, but only sets bar as the matched string.
96    
97      (?| introduces a group where the capturing parentheses in each alternative
98      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
99      parentheses number 1 in both cases.
100    
101      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
102    
103    
104    Release 7.1 24-Apr-07
105    ---------------------
106    
107    There is only one new feature in this release: a linebreak setting of
108    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
109    recognizes only CRLF, CR, and LF as linebreaks.
110    
111    A few bugs are fixed (see ChangeLog for details), but the major change is a
112    complete re-implementation of the build system. This now has full Autotools
113    support and so is now "standard" in some sense. It should help with compiling
114    PCRE in a wide variety of environments.
115    
116    NOTE: when building shared libraries for Windows, three dlls are now built,
117    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
118    included in a single dll.
119    
120    Another important change is that the dftables auxiliary program is no longer
121    compiled and run at "make" time by default. Instead, a default set of character
122    tables (assuming ASCII coding) is used. If you want to use dftables to generate
123    the character tables as previously, add --enable-rebuild-chartables to the
124    "configure" command. You must do this if you are compiling PCRE to run on a
125    system that uses EBCDIC code.
126    
127    There is a discussion about character tables in the README file. The default is
128    not to use dftables so that that there is no problem when cross-compiling.
129    
130    
131    Release 7.0 19-Dec-06
132  ---------------------  ---------------------
133    
134  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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