Mail Archives: djgpp/2015/11/07/22:59:28

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Date: Sat, 07 Nov 2015 22:24:09 +0100
From: "Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp-announce AT delorie DOT com]" <djgpp-announce AT delorie DOT com>
To: djgpp-announce AT delorie DOT com
Subject: ANNOUNCE: DJGPP port of GNU grep 2.22 uploaded.
Reply-To: djgpp AT delorie DOT com

This is a port of GNU grep 2.22 to MSDOS/DJGPP.

   This is GNU grep, the "fastest grep in the west".
   GNU grep is based on a fast lazy-state deterministic matcher (about
   twice as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper
   search for a fixed string that eliminates impossible text from being
   considered by the full regexp matcher without necessarily having to
   look at every character.  The result is typically many times faster
   than Unix grep or egrep.  (Regular expressions containing backreferencing
   will run more slowly, however.)

   DJGPP specific changes.

   - There are no DJGPP specific user visible changes compared with the last port.

   - The port has been tested by using it.  I have used them only on WinXP.
     It has worked flawlessly.  I do not konw if this will ever be the case on
     FreeDOS.  I have never used/tested them in that environment.

   - The port has been configured and compiled on WinXP SP3.  There is no
     guarantee that this may be possible with any other DOS-like OS.  Due
     to the massive use of long file names it will not be possible to configure
     and compile without LFN support.  The port has been compiled using gcc520
     and bnu225br2.

   - The port does not provide NLS support.

   - The port has been configured with perl-regexp (pcre) support enabled.
     This means that you will have to install pcre libray available as:
     if you decide to compile the the preconfigured sources.  If you prefer
     to disable the pcre support you will have to reconfigure and recompile
     the sources again, but this time passing the "no-pcre" command line
     option to config.bat.  The zip file contains only the one build with
     perl-regexp support enabled.

   As usual, all djgpp specific files (diffs, README files, etc.) are stored in
   the /djgpp directory.  The sources have been configured to be build in the
   /_build directory.  If for some reason it does not work for you, delete its
   contents and configure from scratch again.

   For further information about GNU grep please read the info docs and NEWS file.

   This is an verbatim extract of the NEWS file (multi-byte specific features are
   not supported by the DJGPP port):


* Noteworthy changes in release 2.22 (2015-11-01) [stable]

** Improvements

   Performance has improved for patterns containing very long strings,
   reducing preprocessing time for an N-byte regexp from O(N^2) to
   only slightly superlinear for most patterns.  Before, a command like
   the following would take over a minute, but now, it takes less than
   a second:
   : | grep -f <(seq -s '' 99999)

   When building grep, 'configure' now uses PCRE's pkg-config module for
   configuration information, rather than attempting to guess it by hand.

** Bug fixes

   A DFA matcher bug made this command mistakenly print its input line:
     echo axb | grep -E '^x|x$'
   Likewise for this equivalent command:
     echo axb | grep -e '^x' -e 'x$'
   [bug introduced in grep-2.19 ]

   grep no longer reads from uninitialized memory or from beyond the end
   of the heap-allocated input buffer.  This fix addressed CVE-2015-1345.
   [bug introduced in grep-2.19 ]

   With -z, '.' and '[^x]' in a pattern now consistently match newline.
   Previously, they sometimes matched newline, and sometimes did not.
   [bug introduced in grep-2.4]

   When the JIT stack is exhausted, grep -P now grows the stack rather
   than reporting an internal PCRE error.

   'grep -D skip PATTERN FILE' no longer hangs if FILE is a fifo.
   [bug introduced in grep-2.12]

   --exclude and related options are now matched against entire
   command-line arguments, not against command-line components.
   [bug introduced in grep-2.6]

   Fix performance degradation of grep -Fw in unibyte locales.
   [bug introduced in grep-2.19 ]


   The port consists of the usual three packages produced using djdev205
   that can be downloaded from and mirrors as (time stamp 2015-11-07):

     grep 2.22 binaries, info and man format documentation:

     grep 2.22 dvi, html, pdf and ps format documentation:

     grep 2.22 source:

   Send grep specific bug reports to <bug-grep AT gnu DOT org>.
   Send suggestions and bug reports concerning the DJGPP port to
   comp.os.msdos.djgpp or <djgpp AT delorie DOT com>.
   If you are not sure if the failure is really a grep failure
   or a djgpp specific failure, report it here and *not* to
   <bug-grep AT gnu DOT org>.


     Guerrero, Juan Manuel <juan DOT guerrero AT gmx DOT de>

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