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revision 122 by ph10, Mon Mar 12 15:10:25 2007 UTC revision 182 by ph10, Wed Jun 13 15:09:54 2007 UTC
# Line 2  News about PCRE releases Line 2  News about PCRE releases
2  ------------------------  ------------------------
5  Release 7.1 12-Mar-07  Release 7.2 13-Jun-07
6  ---------------------  ---------------------
8  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
9  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,
10  system. This now has full Autotools support and so is now "standard" in some  and \V).
11  sense. It should help with compiling PCRE in a wide variety of environments.  
12    Correction to the notes for 7.1: the note about shared libraries for Windows is
13    wrong. Previously, three libraries were built, but each could function
14    independently. For example, the pcreposix library also included all the
15    functions from the basic pcre library. The change is that the three libraries
16    are no longer independent. They are like the Unix libraries. To use the
17    pcreposix functions, for example, you need to link with both the pcreposix and
18    the basic pcre library.
20    Some more features from Perl 5.10 have been added:
22      (?-n) and (?+n) relative references for recursion and subroutines.
24      (?(-n) and (?(+n) relative references as conditions.
26      \k{name} and \g{name} are synonyms for \k<name>.
28      \K to reset the start of the matched string; for example, (foo)\Kbar
29      matches bar preceded by foo, but only sets bar as the matched string.
31      (?| introduces a group where the capturing parentheses in each alternative
32      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
33      parentheses number 1 in both cases.
35      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
38    Release 7.1 24-Apr-07
39    ---------------------
41    There is only one new feature in this release: a linebreak setting of
42    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
43    recognizes only CRLF, CR, and LF as linebreaks.
45    A few bugs are fixed (see ChangeLog for details), but the major change is a
46    complete re-implementation of the build system. This now has full Autotools
47    support and so is now "standard" in some sense. It should help with compiling
48    PCRE in a wide variety of environments.
50    NOTE: when building shared libraries for Windows, three dlls are now built,
51    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
52    included in a single dll.
54    Another important change is that the dftables auxiliary program is no longer
55    compiled and run at "make" time by default. Instead, a default set of character
56    tables (assuming ASCII coding) is used. If you want to use dftables to generate
57    the character tables as previously, add --enable-rebuild-chartables to the
58    "configure" command. You must do this if you are compiling PCRE to run on a
59    system that uses EBCDIC code.
61    There is a discussion about character tables in the README file. The default is
62    not to use dftables so that that there is no problem when cross-compiling.
65  Release 7.0 19-Dec-06  Release 7.0 19-Dec-06

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