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Compiling PCRE on non-Unix systems
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----------------------------------
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See below for comments on Cygwin or MinGW usage.
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If you want to compile PCRE for a non-Unix system, note that it consists
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entirely of code written in Standard C, and so should compile successfully
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on any machine with a Standard C compiler and library, using normal compiling
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commands to do the following:
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(1) Copy or rename the file config.in as config.h, and change the macros that
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define HAVE_STRERROR and HAVE_MEMMOVE to define them as 1 rather than 0.
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Unfortunately, because of the way Unix autoconf works, the default setting has
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to be 0. You may also want to make changes to other macros in config.h. In
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particular, if you want to force a specific value for newline, you can define
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the NEWLINE macro. The default is to use '\n', thereby using whatever value
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your compiler gives to '\n'.
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(2) Copy or rename the file pcre.in as pcre.h, and change the macro definitions
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for PCRE_MAJOR, PCRE_MINOR, and PCRE_DATE near its start to the values set in
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configure.in.
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(3) Compile dftables.c as a stand-alone program, and then run it with
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the standard output sent to chartables.c. This generates a set of standard
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character tables.
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(4) Compile maketables.c, get.c, study.c and pcre.c and link them all
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together into an object library in whichever form your system keeps such
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libraries. This is the pcre library (chartables.c is included by means of an
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#include directive).
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(5) Similarly, compile pcreposix.c and link it as the pcreposix library.
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(6) Compile the test program pcretest.c. This needs the functions in the
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pcre and pcreposix libraries when linking.
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(7) Run pcretest on the testinput files in the testdata directory, and check
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that the output matches the corresponding testoutput files. You must use the
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-i option when checking testinput2. Note that the supplied files are in Unix
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format, with just LF characters as line terminators. You may need to edit them
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to change this if your system uses a different convention.
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If you have a system without "configure" but where you can use a Makefile, edit
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Makefile.in to create Makefile, substituting suitable values for the variables
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at the head of the file.
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Some help in building a Win32 DLL of PCRE in GnuWin32 environments was
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contributed by Paul Sokolovsky. These environments are Mingw32
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(http://www.xraylith.wisc.edu/~khan/software/gnu-win32/) and CygWin
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(http://sourceware.cygnus.com/cygwin/). Paul comments:
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For CygWin, set CFLAGS=-mno-cygwin, and do 'make dll'. You'll get
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pcre.dll (containing pcreposix also), libpcre.dll.a, and dynamically
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linked pgrep and pcretest. If you have /bin/sh, run RunTest (three
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main test go ok, locale not supported).
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Changes to do MinGW with autoconf 2.50 were supplied by Fred Cox
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<sailorFred@yahoo.com>, who comments as follows:
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If you are using the PCRE DLL, the normal Unix style configure && make &&
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make check && make install should just work[*]. If you want to statically
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link against the .a file, you must define PCRE_STATIC before including
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pcre.h, otherwise the pcre_malloc and pcre_free exported functions will be
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declared __declspec(dllimport), with hilarious results. See the configure.in
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and pcretest.c for how it is done for the static test.
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Also, there will only be a libpcre.la, not a libpcreposix.la, as you
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would expect from the Unix version. The single DLL includes the pcreposix
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interface.
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[*] But note that the supplied test files are in Unix format, with just LF
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characters as line terminators. You will have to edit them to change to CR LF
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terminators.
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A script for building PCRE using Borland's C++ compiler for use with VPASCAL
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was contributed by Alexander Tokarev. It is called makevp.bat.
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These are some further comments about Win32 builds from Mark Evans. They
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were contributed before Fred Cox's changes were made, so it is possible that
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they may no longer be relevant.
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The documentation for Win32 builds is a bit shy. Under MSVC6 I
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followed their instructions to the letter, but there were still
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some things missing.
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(1) Must #define STATIC for entire project if linking statically.
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(I see no reason to use DLLs for code this compact.) This of
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course is a project setting in MSVC under Preprocessor.
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(2) Missing some #ifdefs relating to the function pointers
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pcre_malloc and pcre_free. See my solution below. (The stubs
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may not be mandatory but they made me feel better.)
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=========================
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#ifdef _WIN32
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#include <malloc.h>
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void* malloc_stub(size_t N)
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{ return malloc(N); }
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void free_stub(void* p)
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{ free(p); }
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void *(*pcre_malloc)(size_t) = &malloc_stub;
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void (*pcre_free)(void *) = &free_stub;
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#else
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void *(*pcre_malloc)(size_t) = malloc;
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void (*pcre_free)(void *) = free;
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#endif
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=========================
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****
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