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 Compiling PCRE on non-Unix systems  Compiling PCRE on non-Unix systems
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This document contains the following sections:This has been renamed to better reflect its contents. Please see the file
 NON-AUTOTOOLS-BUILD for details of how to build PCRE without using autotools.
   
  General####
  Generic instructions for the PCRE C library 
  The C++ wrapper functions 
  Building for virtual Pascal 
  Stack size in Windows environments 
  Linking programs in Windows environments 
  Comments about Win32 builds 
  Building PCRE on Windows with CMake 
  Use of relative paths with CMake on Windows 
  Testing with RunTest.bat 
  Building under Windows with BCC5.5 
  Building PCRE on OpenVMS 
  Building PCRE on Stratus OpenVOS 
 
 
GENERAL 
 
I (Philip Hazel) have no experience of Windows or VMS sytems and how their 
libraries work. The items in the PCRE distribution and Makefile that relate to 
anything other than Unix-like systems are untested by me. 
 
There are some other comments and files (including some documentation in CHM 
format) in the Contrib directory on the FTP site: 
 
  ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib 
 
If you want to compile PCRE for a non-Unix system (especially for a system that 
does not support "configure" and "make" files), note that the basic PCRE 
library consists entirely of code written in Standard C, and so should compile 
successfully on any system that has a Standard C compiler and library. The C++ 
wrapper functions are a separate issue (see below). 
 
The PCRE distribution includes a "configure" file for use by the Configure/Make 
build system, as found in many Unix-like environments. There is also support 
for CMake, which some users prefer, especially in Windows environments. See 
the instructions for CMake under Windows in the section entitled "Building 
PCRE with CMake" below. CMake can also be used to build PCRE in Unix-like 
systems. 
 
 
GENERIC INSTRUCTIONS FOR THE PCRE C LIBRARY 
 
The following are generic instructions for building the PCRE C library "by 
hand": 
 
 (1) Copy or rename the file config.h.generic as config.h, and edit the macro 
     settings that it contains to whatever is appropriate for your environment. 
     In particular, if you want to force a specific value for newline, you can 
     define the NEWLINE macro. When you compile any of the PCRE modules, you 
     must specify -DHAVE_CONFIG_H to your compiler so that config.h is included 
     in the sources. 
 
     An alternative approach is not to edit config.h, but to use -D on the 
     compiler command line to make any changes that you need to the 
     configuration options. In this case -DHAVE_CONFIG_H must not be set. 
 
     NOTE: There have been occasions when the way in which certain parameters 
     in config.h are used has changed between releases. (In the configure/make 
     world, this is handled automatically.) When upgrading to a new release, 
     you are strongly advised to review config.h.generic before re-using what 
     you had previously. 
 
 (2) Copy or rename the file pcre.h.generic as pcre.h. 
 
 (3) EITHER: 
       Copy or rename file pcre_chartables.c.dist as pcre_chartables.c. 
 
     OR: 
       Compile dftables.c as a stand-alone program (using -DHAVE_CONFIG_H if 
       you have set up config.h), and then run it with the single argument 
       "pcre_chartables.c". This generates a set of standard character tables 
       and writes them to that file. The tables are generated using the default 
       C locale for your system. If you want to use a locale that is specified 
       by LC_xxx environment variables, add the -L option to the dftables 
       command. You must use this method if you are building on a system that 
       uses EBCDIC code. 
 
     The tables in pcre_chartables.c are defaults. The caller of PCRE can 
     specify alternative tables at run time. 
 
 (4) Ensure that you have the following header files: 
 
       pcre_internal.h 
       ucp.h 
 
 (5) Also ensure that you have the following file, which is #included as source 
     when building a debugging version of PCRE, and is also used by pcretest. 
 
       pcre_printint.src 
 
 (6) Compile the following source files, setting -DHAVE_CONFIG_H as a compiler 
     option if you have set up config.h with your configuration, or else use 
     other -D settings to change the configuration as required. 
 
       pcre_chartables.c 
       pcre_compile.c 
       pcre_config.c 
       pcre_dfa_exec.c 
       pcre_exec.c 
       pcre_fullinfo.c 
       pcre_get.c 
       pcre_globals.c 
       pcre_info.c 
       pcre_maketables.c 
       pcre_newline.c 
       pcre_ord2utf8.c 
       pcre_refcount.c 
       pcre_study.c 
       pcre_tables.c 
       pcre_try_flipped.c 
       pcre_ucd.c 
       pcre_valid_utf8.c 
       pcre_version.c 
       pcre_xclass.c 
 
     Make sure that you include -I. in the compiler command (or equivalent for 
     an unusual compiler) so that all included PCRE header files are first 
     sought in the current directory. Otherwise you run the risk of picking up 
     a previously-installed file from somewhere else. 
 
 (7) If you have defined SUPPORT_JIT in config.h, you must also compile 
 
       pcre_jit_compile.c 
 
     This file #includes sources from the sljit subdirectory, where there 
     should be 16 files, all of whose names begin with "sljit". 
 
 (8) Now link all the compiled code into an object library in whichever form 
     your system keeps such libraries. This is the basic PCRE C library. If 
     your system has static and shared libraries, you may have to do this once 
     for each type. 
 
 (9) Similarly, if you want to build the POSIX wrapper functions, ensure that 
     you have the pcreposix.h file and then compile pcreposix.c (remembering 
     -DHAVE_CONFIG_H if necessary). Link the result (on its own) as the 
     pcreposix library. 
 
(10) Compile the test program pcretest.c (again, don't forget -DHAVE_CONFIG_H). 
     This needs the functions in the PCRE library when linking. It also needs 
     the pcreposix wrapper functions unless you compile it with -DNOPOSIX. The 
     pcretest.c program also needs the pcre_printint.src source file, which it 
     #includes. 
 
(11) Run pcretest on the testinput files in the testdata directory, and check 
     that the output matches the corresponding testoutput files. Some tests are 
     relevant only when certain build-time options are selected. For example, 
     test 4 is for UTF-8 support, and will not run if you have build PCRE 
     without it. See the comments at the start of each testinput file. If you 
     have a suitable Unix-like shell, the RunTest script will run the 
     appropriate tests for you. 
 
     Note that the supplied files are in Unix format, with just LF characters 
     as line terminators. You may need to edit them to change this if your 
     system uses a different convention. If you are using Windows, you probably 
     should use the wintestinput3 file instead of testinput3 (and the 
     corresponding output file). This is a locale test; wintestinput3 sets the 
     locale to "french" rather than "fr_FR", and there some minor output 
     differences. 
 
(12) If you have built PCRE with SUPPORT_JIT, the JIT features will be tested 
     by the testdata files. However, you might also like to build and run 
     the JIT test program, pcre_jit_test.c. 
 
(13) If you want to use the pcregrep command, compile and link pcregrep.c; it 
     uses only the basic PCRE library (it does not need the pcreposix library). 
 
 
THE C++ WRAPPER FUNCTIONS 
 
The PCRE distribution also contains some C++ wrapper functions and tests, 
contributed by Google Inc. On a system that can use "configure" and "make", 
the functions are automatically built into a library called pcrecpp. It should 
be straightforward to compile the .cc files manually on other systems. The 
files called xxx_unittest.cc are test programs for each of the corresponding 
xxx.cc files. 
 
 
BUILDING FOR VIRTUAL PASCAL 
 
A script for building PCRE using Borland's C++ compiler for use with VPASCAL 
was contributed by Alexander Tokarev. Stefan Weber updated the script and added 
additional files. The following files in the distribution are for building PCRE 
for use with VP/Borland: makevp_c.txt, makevp_l.txt, makevp.bat, pcregexp.pas. 
 
 
STACK SIZE IN WINDOWS ENVIRONMENTS 
 
The default processor stack size of 1Mb in some Windows environments is too 
small for matching patterns that need much recursion. In particular, test 2 may 
fail because of this. Normally, running out of stack causes a crash, but there 
have been cases where the test program has just died silently. See your linker 
documentation for how to increase stack size if you experience problems. The 
Linux default of 8Mb is a reasonable choice for the stack, though even that can 
be too small for some pattern/subject combinations. 
 
PCRE has a compile configuration option to disable the use of stack for 
recursion so that heap is used instead. However, pattern matching is 
significantly slower when this is done. There is more about stack usage in the 
"pcrestack" documentation. 
 
 
LINKING PROGRAMS IN WINDOWS ENVIRONMENTS 
 
If you want to statically link a program against a PCRE library in the form of 
a non-dll .a file, you must define PCRE_STATIC before including pcre.h or 
pcrecpp.h, otherwise the pcre_malloc() and pcre_free() exported functions will 
be declared __declspec(dllimport), with unwanted results. 
 
 
CALLING CONVENTIONS IN WINDOWS ENVIRONMENTS 
 
It is possible to compile programs to use different calling conventions using 
MSVC. Search the web for "calling conventions" for more information. To make it 
easier to change the calling convention for the exported functions in the 
PCRE library, the macro PCRE_CALL_CONVENTION is present in all the external 
definitions. It can be set externally when compiling (e.g. in CFLAGS). If it is 
not set, it defaults to empty; the default calling convention is then used 
(which is what is wanted most of the time). 
 
 
COMMENTS ABOUT WIN32 BUILDS (see also "BUILDING PCRE WITH CMAKE" below) 
 
There are two ways of building PCRE using the "configure, make, make install" 
paradigm on Windows systems: using MinGW or using Cygwin. These are not at all 
the same thing; they are completely different from each other. There is also 
support for building using CMake, which some users find a more straightforward 
way of building PCRE under Windows. 
 
The MinGW home page (http://www.mingw.org/) says this: 
 
  MinGW: A collection of freely available and freely distributable Windows 
  specific header files and import libraries combined with GNU toolsets that 
  allow one to produce native Windows programs that do not rely on any 
  3rd-party C runtime DLLs. 
 
The Cygwin home page (http://www.cygwin.com/) says this: 
 
  Cygwin is a Linux-like environment for Windows. It consists of two parts: 
 
  . A DLL (cygwin1.dll) which acts as a Linux API emulation layer providing 
    substantial Linux API functionality 
 
  . A collection of tools which provide Linux look and feel. 
 
  The Cygwin DLL currently works with all recent, commercially released x86 32 
  bit and 64 bit versions of Windows, with the exception of Windows CE. 
 
On both MinGW and Cygwin, PCRE should build correctly using: 
 
  ./configure && make && make install 
 
This should create two libraries called libpcre and libpcreposix, and, if you 
have enabled building the C++ wrapper, a third one called libpcrecpp. These are 
independent libraries: when you link with libpcreposix or libpcrecpp you must 
also link with libpcre, which contains the basic functions. (Some earlier 
releases of PCRE included the basic libpcre functions in libpcreposix. This no 
longer happens.) 
 
A user submitted a special-purpose patch that makes it easy to create 
"pcre.dll" under mingw32 using the "msys" environment. It provides "pcre.dll" 
as a special target. If you use this target, no other files are built, and in 
particular, the pcretest and pcregrep programs are not built. An example of how 
this might be used is: 
 
  ./configure --enable-utf --disable-cpp CFLAGS="-03 -s"; make pcre.dll 
 
Using Cygwin's compiler generates libraries and executables that depend on 
cygwin1.dll. If a library that is generated this way is distributed, 
cygwin1.dll has to be distributed as well. Since cygwin1.dll is under the GPL 
licence, this forces not only PCRE to be under the GPL, but also the entire 
application. A distributor who wants to keep their own code proprietary must 
purchase an appropriate Cygwin licence. 
 
MinGW has no such restrictions. The MinGW compiler generates a library or 
executable that can run standalone on Windows without any third party dll or 
licensing issues. 
 
But there is more complication: 
 
If a Cygwin user uses the -mno-cygwin Cygwin gcc flag, what that really does is 
to tell Cygwin's gcc to use the MinGW gcc. Cygwin's gcc is only acting as a 
front end to MinGW's gcc (if you install Cygwin's gcc, you get both Cygwin's 
gcc and MinGW's gcc). So, a user can: 
 
. Build native binaries by using MinGW or by getting Cygwin and using 
  -mno-cygwin. 
 
. Build binaries that depend on cygwin1.dll by using Cygwin with the normal 
  compiler flags. 
 
The test files that are supplied with PCRE are in UNIX format, with LF 
characters as line terminators. Unless your PCRE library uses a default newline 
option that includes LF as a valid newline, it may be necessary to change the 
line terminators in the test files to get some of the tests to work. 
 
BUILDING PCRE ON WINDOWS WITH CMAKE 
 
CMake is an alternative configuration facility that can be used instead of the 
traditional Unix "configure". CMake creates project files (make files, solution 
files, etc.) tailored to numerous development environments, including Visual 
Studio, Borland, Msys, MinGW, NMake, and Unix.  If possible, use short paths 
with no spaces in the names for your CMake installation and your pcre 
source and build directories. 
 
The following instructions were contributed by a PCRE user. 
 
1.  Install the latest CMake version available from http://www.cmake.org/, and 
    ensure that cmake\bin is on your path. 
 
2.  Unzip (retaining folder structure) the PCRE source tree into a source 
    directory such as C:\pcre. You should ensure your local date and time 
    is not earlier than the file dates in your source dir if the release is 
    very new. 
 
3.  Create a new, empty build directory, preferably a subdirectory of the 
    source dir. For example, C:\pcre\pcre-xx\build. 
 
4.  Run cmake-gui from the Shell envirornment of your build tool, for example, 
    Msys for Msys/MinGW or Visual Studio Command Prompt for VC/VC++. 
 
5.  Enter C:\pcre\pcre-xx and C:\pcre\pcre-xx\build for the source and build 
    directories, respectively. 
 
6.  Hit the "Configure" button. 
 
7.  Select the particular IDE / build tool that you are using (Visual 
    Studio, MSYS makefiles, MinGW makefiles, etc.) 
 
8.  The GUI will then list several configuration options. This is where 
    you can enable UTF-8 support or other PCRE optional features. 
 
9.  Hit "Configure" again. The adjacent "Generate" button should now be 
    active. 
 
10. Hit "Generate". 
 
11. The build directory should now contain a usable build system, be it a 
    solution file for Visual Studio, makefiles for MinGW, etc. Exit from 
    cmake-gui and use the generated build system with your compiler or IDE. 
    E.g., for MinGW you can run "make", or for Visual Studio, open the PCRE 
    solution, select the desired configuration (Debug, or Release, etc.) and 
    build the ALL_BUILD project. 
 
12. If during configuration with cmake-gui you've elected to build the test 
    programs, you can execute them by building the test project. E.g., for 
    MinGW: "make test"; for Visual Studio build the RUN_TESTS project. The 
    most recent build configuration is targeted by the tests. A summary of 
    test results is presented. Complete test output is subsequently 
    available for review in Testing\Temporary under your build dir. 
 
USE OF RELATIVE PATHS WITH CMAKE ON WINDOWS 
 
A PCRE user comments as follows: 
 
I thought that others may want to know the current state of 
CMAKE_USE_RELATIVE_PATHS support on Windows. 
 
Here it is: 
-- AdditionalIncludeDirectories is only partially modified (only the 
first path - see below) 
-- Only some of the contained file paths are modified - shown below for 
pcre.vcproj 
-- It properly modifies 
 
I am sure CMake people can fix that if they want to. Until then one will 
need to replace existing absolute paths in project files with relative 
paths manually (e.g. from VS) - relative to project file location. I did 
just that before being told to try CMAKE_USE_RELATIVE_PATHS. Not a big 
deal. 
 
AdditionalIncludeDirectories="E:\builds\pcre\build;E:\builds\pcre\pcre-7.5;" 
AdditionalIncludeDirectories=".;E:\builds\pcre\pcre-7.5;" 
 
RelativePath="pcre.h"> 
RelativePath="pcre_chartables.c"> 
RelativePath="pcre_chartables.c.rule"> 
 
 
TESTING WITH RUNTEST.BAT 
 
If configured with CMake, building the test project ("make test" or building 
ALL_TESTS in Visual Studio) creates (and runs) pcre_test.bat (and depending 
on your configuration options, possibly other test programs) in the build 
directory. Pcre_test.bat runs RunTest.Bat with correct source and exe paths. 
 
For manual testing with RunTest.bat, provided the build dir is a subdirectory 
of the source directory: Open command shell window. Chdir to the location 
of your pcretest.exe and pcregrep.exe programs. Call RunTest.bat with 
"..\RunTest.Bat" or "..\..\RunTest.bat" as appropriate. 
 
To run only a particular test with RunTest.Bat provide a test number argument. 
 
Otherwise: 
 
1. Copy RunTest.bat into the directory where pcretest.exe and pcregrep.exe 
   have been created. 
 
2. Edit RunTest.bat to indentify the full or relative location of 
   the pcre source (wherein which the testdata folder resides), e.g.: 
 
   set srcdir=C:\pcre\pcre-8.20 
 
3. In a Windows command environment, chdir to the location of your bat and 
exe programs. 
 
4. Run RunTest.bat. Test outputs will automatically be compared to expected 
results, and discrepancies will be identified in the console output. 
 
To independently test the just-in-time compiler, run pcre_jit_test.exe. 
To test pcrecpp, run pcrecpp_unittest.exe, pcre_stringpiece_unittest.exe and 
pcre_scanner_unittest.exe. 
 
BUILDING UNDER WINDOWS WITH BCC5.5 
 
Michael Roy sent these comments about building PCRE under Windows with BCC5.5: 
 
  Some of the core BCC libraries have a version of PCRE from 1998 built in, 
  which can lead to pcre_exec() giving an erroneous PCRE_ERROR_NULL from a 
  version mismatch. I'm including an easy workaround below, if you'd like to 
  include it in the non-unix instructions: 
 
  When linking a project with BCC5.5, pcre.lib must be included before any of 
  the libraries cw32.lib, cw32i.lib, cw32mt.lib, and cw32mti.lib on the command 
  line. 
 
 
BUILDING UNDER WINDOWS CE WITH VISUAL STUDIO 200x 
 
Vincent Richomme sent a zip archive of files to help with this process. They 
can be found in the file "pcre-vsbuild.zip" in the Contrib directory of the FTP 
site. 
 
 
BUILDING PCRE ON OPENVMS 
 
Dan Mooney sent the following comments about building PCRE on OpenVMS. They 
relate to an older version of PCRE that used fewer source files, so the exact 
commands will need changing. See the current list of source files above. 
 
"It was quite easy to compile and link the library. I don't have a formal 
make file but the attached file [reproduced below] contains the OpenVMS DCL 
commands I used to build the library. I had to add #define 
POSIX_MALLOC_THRESHOLD 10 to pcre.h since it was not defined anywhere. 
 
The library was built on: 
O/S: HP OpenVMS v7.3-1 
Compiler: Compaq C v6.5-001-48BCD 
Linker: vA13-01 
 
The test results did not match 100% due to the issues you mention in your 
documentation regarding isprint(), iscntrl(), isgraph() and ispunct(). I 
modified some of the character tables temporarily and was able to get the 
results to match. Tests using the fr locale did not match since I don't have 
that locale loaded. The study size was always reported to be 3 less than the 
value in the standard test output files." 
 
========================= 
$! This DCL procedure builds PCRE on OpenVMS 
$! 
$! I followed the instructions in the non-unix-use file in the distribution. 
$! 
$ COMPILE == "CC/LIST/NOMEMBER_ALIGNMENT/PREFIX_LIBRARY_ENTRIES=ALL_ENTRIES 
$ COMPILE DFTABLES.C 
$ LINK/EXE=DFTABLES.EXE DFTABLES.OBJ 
$ RUN DFTABLES.EXE/OUTPUT=CHARTABLES.C 
$ COMPILE MAKETABLES.C 
$ COMPILE GET.C 
$ COMPILE STUDY.C 
$! I had to set POSIX_MALLOC_THRESHOLD to 10 in PCRE.H since the symbol 
$! did not seem to be defined anywhere. 
$! I edited pcre.h and added #DEFINE SUPPORT_UTF8 to enable UTF8 support. 
$ COMPILE PCRE.C 
$ LIB/CREATE PCRE MAKETABLES.OBJ, GET.OBJ, STUDY.OBJ, PCRE.OBJ 
$! I had to set POSIX_MALLOC_THRESHOLD to 10 in PCRE.H since the symbol 
$! did not seem to be defined anywhere. 
$ COMPILE PCREPOSIX.C 
$ LIB/CREATE PCREPOSIX PCREPOSIX.OBJ 
$ COMPILE PCRETEST.C 
$ LINK/EXE=PCRETEST.EXE PCRETEST.OBJ, PCRE/LIB, PCREPOSIX/LIB 
$! C programs that want access to command line arguments must be 
$! defined as a symbol 
$ PCRETEST :== "$ SYS$ROADSUSERS:[DMOONEY.REGEXP]PCRETEST.EXE" 
$! Arguments must be enclosed in quotes. 
$ PCRETEST "-C" 
$! Test results: 
$! 
$!   The test results did not match 100%. The functions isprint(), iscntrl(), 
$!   isgraph() and ispunct() on OpenVMS must not produce the same results 
$!   as the system that built the test output files provided with the 
$!   distribution. 
$! 
$!   The study size did not match and was always 3 less on OpenVMS. 
$! 
$!   Locale could not be set to fr 
$! 
========================= 
 
 
BUILDING PCRE ON STRATUS OPENVOS 
 
These notes on the port of PCRE to VOS (lightly edited) were supplied by 
Ashutosh Warikoo, whose email address has the local part awarikoo and the 
domain nse.co.in. The port was for version 7.9 in August 2009. 
 
1.   Building PCRE 
 
I built pcre on OpenVOS Release 17.0.1at using GNU Tools 3.4a without any 
problems. I used the following packages to build PCRE: 
 
  ftp://ftp.stratus.com/pub/vos/posix/ga/posix.save.evf.gz 
 
Please read and follow the instructions that come with these packages. To start 
the build of pcre, from the root of the package type: 
 
  ./build.sh 
 
2. Installing PCRE 
 
Once you have successfully built PCRE, login to the SysAdmin group, switch to 
the root user, and type 
 
  [ !create_dir (master_disk)>usr   --if needed ] 
  [ !create_dir (master_disk)>usr>local   --if needed ] 
    !gmake install 
 
This installs PCRE and its man pages into /usr/local. You can add 
(master_disk)>usr>local>bin to your command search paths, or if you are in 
BASH, add /usr/local/bin to the PATH environment variable. 
 
4. Restrictions 
 
This port requires readline library optionally. However during the build I 
faced some yet unexplored errors while linking with readline. As it was an 
optional component I chose to disable it. 
 
5. Known Problems 
 
I ran the test suite, but you will have to be your own judge of whether this 
command, and this port, suits your purposes. If you find any problems that 
appear to be related to the port itself, please let me know. Please see the 
build.log file in the root of the package also. 
 
 
========================= 
Last Updated: 9 October 2011 
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