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revision 123 by ph10, Mon Mar 12 15:19:06 2007 UTC revision 220 by ph10, Thu Aug 16 13:29:39 2007 UTC
# Line 2  News about PCRE releases Line 2  News about PCRE releases
2  ------------------------  ------------------------
3    
4    
5  Release 7.1 12-Mar-07  Release 7.3 16-Aug-07
6  ---------------------  ---------------------
7    
8  There are no new features in this release. A few bugs are fixed (see ChangeLog  Most changes are bug fixes. Some that are not:
9  for details), but the major change is a complete re-implementation of the build  
10  system. This now has full Autotools support and so is now "standard" in some  1. There is some support for Perl 5.10's experimental "backtracking control
11  sense. It should help with compiling PCRE in a wide variety of environments.     verbs" such as (*PRUNE).
12    
13    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
14       restrictive in the strings it accepts.
15    
16    3. Checking for potential integer overflow has been made more dynamic, and as a
17       consequence there is no longer a hard limit on the size of a subpattern that
18       has a limited repeat count.
19    
20    
21    Release 7.2 19-Jun-07
22    ---------------------
23    
24    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
25    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
26    and \V).
27    
28    Correction to the notes for 7.1: the note about shared libraries for Windows is
29    wrong. Previously, three libraries were built, but each could function
30    independently. For example, the pcreposix library also included all the
31    functions from the basic pcre library. The change is that the three libraries
32    are no longer independent. They are like the Unix libraries. To use the
33    pcreposix functions, for example, you need to link with both the pcreposix and
34    the basic pcre library.
35    
36    Some more features from Perl 5.10 have been added:
37    
38      (?-n) and (?+n) relative references for recursion and subroutines.
39    
40      (?(-n) and (?(+n) relative references as conditions.
41    
42      \k{name} and \g{name} are synonyms for \k<name>.
43    
44      \K to reset the start of the matched string; for example, (foo)\Kbar
45      matches bar preceded by foo, but only sets bar as the matched string.
46    
47      (?| introduces a group where the capturing parentheses in each alternative
48      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
49      parentheses number 1 in both cases.
50    
51      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
52    
53    
54    Release 7.1 24-Apr-07
55    ---------------------
56    
57    There is only one new feature in this release: a linebreak setting of
58    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
59    recognizes only CRLF, CR, and LF as linebreaks.
60    
61    A few bugs are fixed (see ChangeLog for details), but the major change is a
62    complete re-implementation of the build system. This now has full Autotools
63    support and so is now "standard" in some sense. It should help with compiling
64    PCRE in a wide variety of environments.
65    
66    NOTE: when building shared libraries for Windows, three dlls are now built,
67    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
68    included in a single dll.
69    
70    Another important change is that the dftables auxiliary program is no longer
71    compiled and run at "make" time by default. Instead, a default set of character
72    tables (assuming ASCII coding) is used. If you want to use dftables to generate
73    the character tables as previously, add --enable-rebuild-chartables to the
74    "configure" command. You must do this if you are compiling PCRE to run on a
75    system that uses EBCDIC code.
76    
77    There is a discussion about character tables in the README file. The default is
78    not to use dftables so that that there is no problem when cross-compiling.
79    
80    
81  Release 7.0 19-Dec-06  Release 7.0 19-Dec-06

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