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1  README file for PCRE (Perl-compatible regular expression library)  README file for PCRE (Perl-compatible regular expression library)
2  -----------------------------------------------------------------  -----------------------------------------------------------------
3    
4  The latest release of PCRE is always available from  The latest release of PCRE is always available in three alternative formats
5    from:
6    
7    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz
8      ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.bz2
9      ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.zip
10    
11  There is a mailing list for discussion about the development of PCRE at  There is a mailing list for discussion about the development of PCRE at
12    
# Line 82  documentation is supplied in two other f Line 85  documentation is supplied in two other f
85       in various ways, and rooted in a file called index.html, is distributed in       in various ways, and rooted in a file called index.html, is distributed in
86       doc/html and installed in <prefix>/share/doc/pcre/html.       doc/html and installed in <prefix>/share/doc/pcre/html.
87    
88    Users of PCRE have contributed files containing the documentation for various
89    releases in CHM format. These can be found in the Contrib directory of the FTP
90    site (see next section).
91    
92    
93  Contributions by users of PCRE  Contributions by users of PCRE
94  ------------------------------  ------------------------------
# Line 104  Building PCRE on non-Unix systems Line 111  Building PCRE on non-Unix systems
111  For a non-Unix system, please read the comments in the file NON-UNIX-USE,  For a non-Unix system, please read the comments in the file NON-UNIX-USE,
112  though if your system supports the use of "configure" and "make" you may be  though if your system supports the use of "configure" and "make" you may be
113  able to build PCRE in the same way as for Unix-like systems. PCRE can also be  able to build PCRE in the same way as for Unix-like systems. PCRE can also be
114  configured in many platform environments using the GUI facility of CMake's  configured in many platform environments using the GUI facility provided by
115  CMakeSetup. It creates Makefiles, solution files, etc.  CMake's cmake-gui command. This creates Makefiles, solution files, etc.
116    
117  PCRE has been compiled on many different operating systems. It should be  PCRE has been compiled on many different operating systems. It should be
118  straightforward to build PCRE on any system that has a Standard C compiler and  straightforward to build PCRE on any system that has a Standard C compiler and
# Line 119  If you are using HP's ANSI C++ compiler Line 126  If you are using HP's ANSI C++ compiler
126  in the section entitled "Using HP's ANSI C++ compiler (aCC)" below.  in the section entitled "Using HP's ANSI C++ compiler (aCC)" below.
127    
128  The following instructions assume the use of the widely used "configure, make,  The following instructions assume the use of the widely used "configure, make,
129  make install" process. There is also some experimental support for "cmake" in  make install" process. There is also support for CMake in the PCRE
130  the PCRE distribution, but it is incomplete and not documented. However, if you  distribution; there are some comments about using CMake in the NON-UNIX-USE
131  are a "cmake" user, you might want to try it.  file, though it can also be used in Unix-like systems.
132    
133  To build PCRE on a Unix-like system, first run the "configure" command from the  To build PCRE on a Unix-like system, first run the "configure" command from the
134  PCRE distribution directory, with your current directory set to the directory  PCRE distribution directory, with your current directory set to the directory
# Line 158  library. You can read more about them in Line 165  library. You can read more about them in
165    it will try to find a C++ compiler and C++ header files, and if it succeeds,    it will try to find a C++ compiler and C++ header files, and if it succeeds,
166    it will try to build the C++ wrapper.    it will try to build the C++ wrapper.
167    
168  . If you want to make use of the support for UTF-8 character strings in PCRE,  . If you want to make use of the support for UTF-8 Unicode character strings in
169    you must add --enable-utf8 to the "configure" command. Without it, the code    PCRE, you must add --enable-utf8 to the "configure" command. Without it, the
170    for handling UTF-8 is not included in the library. (Even when included, it    code for handling UTF-8 is not included in the library. Even when included,
171    still has to be enabled by an option at run time.)    it still has to be enabled by an option at run time. When PCRE is compiled
172      with this option, its input can only either be ASCII or UTF-8, even when
173      running on EBCDIC platforms. It is not possible to use both --enable-utf8 and
174      --enable-ebcdic at the same time.
175    
176  . If, in addition to support for UTF-8 character strings, you want to include  . If, in addition to support for UTF-8 character strings, you want to include
177    support for the \P, \p, and \X sequences that recognize Unicode character    support for the \P, \p, and \X sequences that recognize Unicode character
# Line 252  library. You can read more about them in Line 262  library. You can read more about them in
262    pcre_chartables.c.dist. See "Character tables" below for further information.    pcre_chartables.c.dist. See "Character tables" below for further information.
263    
264  . It is possible to compile PCRE for use on systems that use EBCDIC as their  . It is possible to compile PCRE for use on systems that use EBCDIC as their
265    default character code (as opposed to ASCII) by specifying    character code (as opposed to ASCII) by specifying
266    
267    --enable-ebcdic    --enable-ebcdic
268    
269    This automatically implies --enable-rebuild-chartables (see above).    This automatically implies --enable-rebuild-chartables (see above). However,
270      when PCRE is built this way, it always operates in EBCDIC. It cannot support
271      both EBCDIC and UTF-8.
272    
273  . It is possible to compile pcregrep to use libz and/or libbz2 to read .gz  . It is possible to compile pcregrep to use libz and/or libbz2, in order to
274    and .bz2 files (respectively) by specifying one or both of    read .gz and .bz2 files (respectively), by specifying one or both of
275    
276    --enable-pcregrep-libz    --enable-pcregrep-libz
277    --enable-pcregrep-libbz2    --enable-pcregrep-libbz2
278    
279      Of course, the relevant libraries must be installed on your system.
280    
281    . It is possible to compile pcretest so that it links with the libreadline
282      library, by specifying
283    
284      --enable-pcretest-libreadline
285    
286      If this is done, when pcretest's input is from a terminal, it reads it using
287      the readline() function. This provides line-editing and history facilities.
288      Note that libreadline is GPL-licenced, so if you distribute a binary of
289      pcretest linked in this way, there may be licensing issues.
290    
291      Setting this option causes the -lreadline option to be added to the pcretest
292      build. In many operating environments with a sytem-installed readline
293      library this is sufficient. However, in some environments (e.g. if an
294      unmodified distribution version of readline is in use), it may be necessary
295      to specify something like LIBS="-lncurses" as well. This is because, to quote
296      the readline INSTALL, "Readline uses the termcap functions, but does not link
297      with the termcap or curses library itself, allowing applications which link
298      with readline the to choose an appropriate library." If you get error
299      messages about missing functions tgetstr, tgetent, tputs, tgetflag, or tgoto,
300      this is the problem, and linking with the ncurses library should fix it.
301    
302  The "configure" script builds the following files for the basic C library:  The "configure" script builds the following files for the basic C library:
303    
304  . Makefile is the makefile that builds the library  . Makefile is the makefile that builds the library
# Line 291  script that can be run to recreate the c Line 326  script that can be run to recreate the c
326  contains compiler output from tests that "configure" runs.  contains compiler output from tests that "configure" runs.
327    
328  Once "configure" has run, you can run "make". It builds two libraries, called  Once "configure" has run, you can run "make". It builds two libraries, called
329  libpcre and libpcreposix, a test program called pcretest, a demonstration  libpcre and libpcreposix, a test program called pcretest, and the pcregrep
330  program called pcredemo, and the pcregrep command. If a C++ compiler was found  command. If a C++ compiler was found on your system, "make" also builds the C++
331  on your system, "make" also builds the C++ wrapper library, which is called  wrapper library, which is called libpcrecpp, and some test programs called
332  libpcrecpp, and some test programs called pcrecpp_unittest,  pcrecpp_unittest, pcre_scanner_unittest, and pcre_stringpiece_unittest.
333  pcre_scanner_unittest, and pcre_stringpiece_unittest. Building the C++ wrapper  Building the C++ wrapper can be disabled by adding --disable-cpp to the
334  can be disabled by adding --disable-cpp to the "configure" command.  "configure" command.
335    
336  The command "make check" runs all the appropriate tests. Details of the PCRE  The command "make check" runs all the appropriate tests. Details of the PCRE
337  tests are given below in a separate section of this document.  tests are given below in a separate section of this document.
# Line 348  system. The following are installed (fil Line 383  system. The following are installed (fil
383      pcretest.txt   the pcretest man page      pcretest.txt   the pcretest man page
384      pcregrep.txt   the pcregrep man page      pcregrep.txt   the pcregrep man page
385    
 Note that the pcredemo program that is built by "configure" is *not* installed  
 anywhere. It is a demonstration for programmers wanting to use PCRE.  
   
386  If you want to remove PCRE from your system, you can run "make uninstall".  If you want to remove PCRE from your system, you can run "make uninstall".
387  This removes all the files that "make install" installed. However, it does not  This removes all the files that "make install" installed. However, it does not
388  remove any directories, because these are often shared with other programs.  remove any directories, because these are often shared with other programs.
# Line 622  The distribution should contain the foll Line 654  The distribution should contain the foll
654    pcre_study.c            )    pcre_study.c            )
655    pcre_tables.c           )    pcre_tables.c           )
656    pcre_try_flipped.c      )    pcre_try_flipped.c      )
657    pcre_ucp_searchfuncs.c  )    pcre_ucd.c              )
658    pcre_valid_utf8.c       )    pcre_valid_utf8.c       )
659    pcre_version.c          )    pcre_version.c          )
660    pcre_xclass.c           )    pcre_xclass.c           )
# Line 631  The distribution should contain the foll Line 663  The distribution should contain the foll
663    pcre.h.in               template for pcre.h when built by "configure"    pcre.h.in               template for pcre.h when built by "configure"
664    pcreposix.h             header for the external POSIX wrapper API    pcreposix.h             header for the external POSIX wrapper API
665    pcre_internal.h         header for internal use    pcre_internal.h         header for internal use
666    ucp.h                   ) headers concerned with    ucp.h                   header for Unicode property handling
   ucpinternal.h           )   Unicode property handling  
   ucptable.h              ) (this one is the data table)  
667    
668    config.h.in             template for config.h, which is built by "configure"    config.h.in             template for config.h, which is built by "configure"
669    
# Line 682  The distribution should contain the foll Line 712  The distribution should contain the foll
712                            )   "configure" and config.h                            )   "configure" and config.h
713    depcomp                 ) script to find program dependencies, generated by    depcomp                 ) script to find program dependencies, generated by
714                            )   automake                            )   automake
715    doc/*.3                 man page sources for the PCRE functions    doc/*.3                 man page sources for PCRE
716    doc/*.1                 man page sources for pcregrep and pcretest    doc/*.1                 man page sources for pcregrep and pcretest
717    doc/index.html.src      the base HTML page    doc/index.html.src      the base HTML page
718    doc/html/*              HTML documentation    doc/html/*              HTML documentation
# Line 691  The distribution should contain the foll Line 721  The distribution should contain the foll
721    doc/perltest.txt        plain text documentation of Perl test program    doc/perltest.txt        plain text documentation of Perl test program
722    install-sh              a shell script for installing files    install-sh              a shell script for installing files
723    libpcre.pc.in           template for libpcre.pc for pkg-config    libpcre.pc.in           template for libpcre.pc for pkg-config
724      libpcreposix.pc.in      template for libpcreposix.pc for pkg-config
725    libpcrecpp.pc.in        template for libpcrecpp.pc for pkg-config    libpcrecpp.pc.in        template for libpcrecpp.pc for pkg-config
726    ltmain.sh               file used to build a libtool script    ltmain.sh               file used to build a libtool script
727    missing                 ) common stub for a few missing GNU programs while    missing                 ) common stub for a few missing GNU programs while
# Line 707  The distribution should contain the foll Line 738  The distribution should contain the foll
738    
739  (D) Auxiliary files for cmake support  (D) Auxiliary files for cmake support
740    
741      cmake/COPYING-CMAKE-SCRIPTS
742      cmake/FindPackageHandleStandardArgs.cmake
743      cmake/FindReadline.cmake
744    CMakeLists.txt    CMakeLists.txt
745    config-cmake.h.in    config-cmake.h.in
746    
# Line 731  The distribution should contain the foll Line 765  The distribution should contain the foll
765  Philip Hazel  Philip Hazel
766  Email local part: ph10  Email local part: ph10
767  Email domain: cam.ac.uk  Email domain: cam.ac.uk
768  Last updated: 17 December 2007  Last updated: 06 September 2009

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