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Revision 654 - (hide annotations) (download)
Tue Aug 2 11:00:40 2011 UTC (3 years, 4 months ago) by ph10
File size: 28721 byte(s)
Documentation and general text tidies in preparation for test release.

1 nigel 87 dnl Process this file with autoconf to produce a configure script.
2    
3 ph10 481 dnl NOTE FOR MAINTAINERS: Do not use minor version numbers 08 or 09 because
4     dnl the leading zeros may cause them to be treated as invalid octal constants
5     dnl if a PCRE user writes code that uses PCRE_MINOR as a number. There is now
6     dnl a check further down that throws an error if 08 or 09 are used.
7 ph10 99
8 ph10 481 dnl The PCRE_PRERELEASE feature is for identifying release candidates. It might
9     dnl be defined as -RC2, for example. For real releases, it should be empty.
10    
11 ph10 418 m4_define(pcre_major, [8])
12 ph10 592 m4_define(pcre_minor, [13])
13     m4_define(pcre_prerelease, [-RC1])
14 ph10 651 m4_define(pcre_date, [2011-08-02])
15 nigel 87
16 ph10 97 # Libtool shared library interface versions (current:revision:age)
17     m4_define(libpcre_version, [0:1:0])
18     m4_define(libpcreposix_version, [0:0:0])
19     m4_define(libpcrecpp_version, [0:0:0])
20 nigel 87
21 ph10 97 AC_PREREQ(2.57)
22     AC_INIT(PCRE, pcre_major.pcre_minor[]pcre_prerelease, , pcre)
23     AC_CONFIG_SRCDIR([pcre.h.in])
24     AM_INIT_AUTOMAKE([dist-bzip2 dist-zip])
25     AC_CONFIG_HEADERS(config.h)
26 ph10 159
27 ph10 479 # This was added at the suggestion of libtoolize (03-Jan-10)
28     AC_CONFIG_MACRO_DIR([m4])
29    
30 ph10 159 # The default CFLAGS and CXXFLAGS in Autoconf are "-g -O2" for gcc and just
31     # "-g" for any other compiler. There doesn't seem to be a standard way of
32     # getting rid of the -g (which I don't think is needed for a production
33     # library). This fudge seems to achieve the necessary. First, we remember the
34     # externally set values of CFLAGS and CXXFLAGS. Then call the AC_PROG_CC and
35     # AC_PROG_CXX macros to find the compilers - if CFLAGS and CXXFLAGS are not
36     # set, they will be set to Autoconf's defaults. Afterwards, if the original
37     # values were not set, remove the -g from the Autoconf defaults.
38     # (PH 02-May-07)
39    
40     remember_set_CFLAGS="$CFLAGS"
41     remember_set_CXXFLAGS="$CXXFLAGS"
42    
43 ph10 97 AC_PROG_CC
44     AC_PROG_CXX
45 ph10 159
46     if test "x$remember_set_CFLAGS" = "x"
47     then
48     if test "$CFLAGS" = "-g -O2"
49     then
50     CFLAGS="-O2"
51     elif test "$CFLAGS" = "-g"
52     then
53     CFLAGS=""
54     fi
55     fi
56    
57     if test "x$remember_set_CXXFLAGS" = "x"
58     then
59     if test "$CXXFLAGS" = "-g -O2"
60     then
61     CXXFLAGS="-O2"
62     elif test "$CXXFLAGS" = "-g"
63     then
64     CXXFLAGS=""
65     fi
66     fi
67    
68 ph10 330 # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
69     # Check for that case, and just disable c++ code if g++ doesn't run.
70     AC_LANG_PUSH(C++)
71 ph10 644 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],, CXX=""; CXXCP=""; CXXFLAGS="")
72 ph10 330 AC_LANG_POP
73 ph10 159
74 ph10 475 # Check for a 64-bit integer type
75     AC_TYPE_INT64_T
76    
77 ph10 97 AC_PROG_INSTALL
78     AC_LIBTOOL_WIN32_DLL
79 ph10 644 LT_INIT
80 ph10 137 AC_PROG_LN_S
81 nigel 87
82 ph10 97 PCRE_MAJOR="pcre_major"
83     PCRE_MINOR="pcre_minor"
84     PCRE_PRERELEASE="pcre_prerelease"
85     PCRE_DATE="pcre_date"
86 nigel 87
87 ph10 481 if test "$PCRE_MINOR" = "08" -o "$PCRE_MINOR" = "09"
88     then
89     echo "***"
90     echo "*** Minor version number $PCRE_MINOR must not be used. ***"
91 ph10 487 echo "*** Use only 01 to 07 or 10 onwards, to avoid octal issues. ***"
92     echo "***"
93 ph10 481 exit 1
94 ph10 487 fi
95 ph10 481
96 ph10 97 AC_SUBST(PCRE_MAJOR)
97     AC_SUBST(PCRE_MINOR)
98     AC_SUBST(PCRE_PRERELEASE)
99     AC_SUBST(PCRE_DATE)
100 nigel 87
101 ph10 97 # Set a more sensible default value for $(htmldir).
102     if test "x$htmldir" = 'x${docdir}'
103     then
104     htmldir='${docdir}/html'
105     fi
106 nigel 87
107 ph10 492 # Handle --disable-cpp. The substitution of enable_cpp is needed for use in
108     # pcre-config.
109 ph10 97 AC_ARG_ENABLE(cpp,
110     AS_HELP_STRING([--disable-cpp],
111     [disable C++ support]),
112     , enable_cpp=yes)
113 ph10 507 AC_SUBST(enable_cpp)
114 nigel 87
115 ph10 128 # Handle --enable-rebuild-chartables
116     AC_ARG_ENABLE(rebuild-chartables,
117     AS_HELP_STRING([--enable-rebuild-chartables],
118     [rebuild character tables in current locale]),
119     , enable_rebuild_chartables=no)
120    
121 ph10 97 # Handle --enable-utf8 (disabled by default)
122     AC_ARG_ENABLE(utf8,
123     AS_HELP_STRING([--enable-utf8],
124 ph10 391 [enable UTF-8 support (incompatible with --enable-ebcdic)]),
125 ph10 97 , enable_utf8=unset)
126 nigel 87
127 ph10 97 # Handle --enable-unicode-properties
128     AC_ARG_ENABLE(unicode-properties,
129     AS_HELP_STRING([--enable-unicode-properties],
130     [enable Unicode properties support (implies --enable-utf8)]),
131     , enable_unicode_properties=no)
132 nigel 87
133 ph10 97 # Handle --enable-newline=NL
134     dnl AC_ARG_ENABLE(newline,
135     dnl AS_HELP_STRING([--enable-newline=NL],
136 ph10 149 dnl [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
137 ph10 97 dnl , enable_newline=lf)
138 nigel 87
139 ph10 97 # Separate newline options
140     ac_pcre_newline=lf
141     AC_ARG_ENABLE(newline-is-cr,
142     AS_HELP_STRING([--enable-newline-is-cr],
143     [use CR as newline character]),
144     ac_pcre_newline=cr)
145     AC_ARG_ENABLE(newline-is-lf,
146     AS_HELP_STRING([--enable-newline-is-lf],
147     [use LF as newline character (default)]),
148     ac_pcre_newline=lf)
149     AC_ARG_ENABLE(newline-is-crlf,
150     AS_HELP_STRING([--enable-newline-is-crlf],
151     [use CRLF as newline sequence]),
152     ac_pcre_newline=crlf)
153 ph10 149 AC_ARG_ENABLE(newline-is-anycrlf,
154     AS_HELP_STRING([--enable-newline-is-anycrlf],
155     [use CR, LF, or CRLF as newline sequence]),
156     ac_pcre_newline=anycrlf)
157 ph10 97 AC_ARG_ENABLE(newline-is-any,
158     AS_HELP_STRING([--enable-newline-is-any],
159     [use any valid Unicode newline sequence]),
160     ac_pcre_newline=any)
161     enable_newline="$ac_pcre_newline"
162 nigel 87
163 ph10 231 # Handle --enable-bsr-anycrlf
164     AC_ARG_ENABLE(bsr-anycrlf,
165     AS_HELP_STRING([--enable-bsr-anycrlf],
166     [\R matches only CR, LF, CRLF by default]),
167     , enable_bsr_anycrlf=no)
168    
169 ph10 97 # Handle --enable-ebcdic
170     AC_ARG_ENABLE(ebcdic,
171     AS_HELP_STRING([--enable-ebcdic],
172 ph10 391 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
173 ph10 97 , enable_ebcdic=no)
174 nigel 87
175 ph10 97 # Handle --disable-stack-for-recursion
176     AC_ARG_ENABLE(stack-for-recursion,
177     AS_HELP_STRING([--disable-stack-for-recursion],
178     [don't use stack recursion when matching]),
179     , enable_stack_for_recursion=yes)
180 nigel 87
181 ph10 286 # Handle --enable-pcregrep-libz
182     AC_ARG_ENABLE(pcregrep-libz,
183     AS_HELP_STRING([--enable-pcregrep-libz],
184     [link pcregrep with libz to handle .gz files]),
185     , enable_pcregrep_libz=no)
186    
187     # Handle --enable-pcregrep-libbz2
188     AC_ARG_ENABLE(pcregrep-libbz2,
189     AS_HELP_STRING([--enable-pcregrep-libbz2],
190     [link pcregrep with libbz2 to handle .bz2 files]),
191     , enable_pcregrep_libbz2=no)
192    
193 ph10 644 # Handle --with-pcregrep-bufsize=N
194     AC_ARG_WITH(pcregrep-bufsize,
195     AS_HELP_STRING([--with-pcregrep-bufsize=N],
196     [pcregrep buffer size (default=20480)]),
197     , with_pcregrep_bufsize=20480)
198    
199 ph10 287 # Handle --enable-pcretest-libreadline
200     AC_ARG_ENABLE(pcretest-libreadline,
201     AS_HELP_STRING([--enable-pcretest-libreadline],
202     [link pcretest with libreadline]),
203     , enable_pcretest_libreadline=no)
204    
205 ph10 97 # Handle --with-posix-malloc-threshold=NBYTES
206     AC_ARG_WITH(posix-malloc-threshold,
207     AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
208     [threshold for POSIX malloc usage (default=10)]),
209     , with_posix_malloc_threshold=10)
210 nigel 87
211 ph10 97 # Handle --with-link-size=N
212     AC_ARG_WITH(link-size,
213     AS_HELP_STRING([--with-link-size=N],
214     [internal link size (2, 3, or 4 allowed; default=2)]),
215     , with_link_size=2)
216 nigel 87
217 ph10 97 # Handle --with-match-limit=N
218     AC_ARG_WITH(match-limit,
219     AS_HELP_STRING([--with-match-limit=N],
220     [default limit on internal looping (default=10000000)]),
221     , with_match_limit=10000000)
222 nigel 87
223 ph10 97 # Handle --with-match-limit_recursion=N
224     #
225     # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
226     # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
227     # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
228     # different numeric value (or even the same numeric value as MATCH_LIMIT,
229     # though no longer defined in terms of the latter).
230     #
231     AC_ARG_WITH(match-limit-recursion,
232     AS_HELP_STRING([--with-match-limit-recursion=N],
233     [default limit on internal recursion (default=MATCH_LIMIT)]),
234     , with_match_limit_recursion=MATCH_LIMIT)
235 nigel 87
236 ph10 97 # Make sure that if enable_unicode_properties was set, that UTF-8 support
237     # is enabled.
238     #
239     if test "x$enable_unicode_properties" = "xyes"
240     then
241     if test "x$enable_utf8" = "xno"
242     then
243     AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
244     fi
245     enable_utf8=yes
246     fi
247 nigel 87
248 ph10 97 if test "x$enable_utf8" = "xunset"
249     then
250     enable_utf8=no
251     fi
252 nigel 87
253 ph10 128 # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
254 ph10 391 # Also check that UTF-8 support is not requested, because PCRE cannot handle
255     # EBCDIC and UTF-8 in the same build. To do so it would need to use different
256     # character constants depending on the mode.
257 ph10 128 #
258 ph10 137 if test "x$enable_ebcdic" = "xyes"
259 ph10 128 then
260     enable_rebuild_chartables=yes
261 ph10 391 if test "x$enable_utf8" = "xyes"
262     then
263     AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
264     fi
265 ph10 128 fi
266    
267 ph10 97 # Convert the newline identifier into the appropriate integer value.
268     case "$enable_newline" in
269 ph10 149 lf) ac_pcre_newline_value=10 ;;
270     cr) ac_pcre_newline_value=13 ;;
271     crlf) ac_pcre_newline_value=3338 ;;
272 ph10 150 anycrlf) ac_pcre_newline_value=-2 ;;
273 ph10 149 any) ac_pcre_newline_value=-1 ;;
274 ph10 97 *)
275     AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
276     ;;
277     esac
278 nigel 87
279 ph10 97 # Check argument to --with-link-size
280     case "$with_link_size" in
281     2|3|4) ;;
282     *)
283     AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
284     ;;
285     esac
286 nigel 87
287 ph10 97 AH_TOP([
288 ph10 100 /* On Unix-like systems config.h.in is converted by "configure" into config.h.
289     Some other environments also support the use of "configure". PCRE is written in
290     Standard C, but there are a few non-standard things it can cope with, allowing
291     it to run on SunOS4 and other "close to standard" systems.
292 nigel 87
293 ph10 111 If you are going to build PCRE "by hand" on a system without "configure" you
294     should copy the distributed config.h.generic to config.h, and then set up the
295 ph10 237 macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
296     all of your compile commands, so that config.h is included at the start of
297     every source.
298 nigel 87
299 ph10 237 Alternatively, you can avoid editing by using -D on the compiler command line
300     to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
301    
302 ph10 111 PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
303     HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
304     them both to 0; an emulation function will be used. */])
305 ph10 100
306 ph10 97 # Checks for header files.
307 nigel 87 AC_HEADER_STDC
308 ph10 97 AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
309 nigel 87
310 ph10 97 # The files below are C++ header files.
311     pcre_have_type_traits="0"
312     pcre_have_bits_type_traits="0"
313     if test "x$enable_cpp" = "xyes" -a -n "$CXX"
314 nigel 87 then
315 ph10 97 AC_LANG_PUSH(C++)
316 nigel 87
317 ph10 330 # Older versions of pcre defined pcrecpp::no_arg, but in new versions
318     # it's called pcrecpp::RE::no_arg. For backwards ABI compatibility,
319     # we want to make one an alias for the other. Different systems do
320     # this in different ways. Some systems, for instance, can do it via
321     # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
322     OLD_LDFLAGS="$LDFLAGS"
323     for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
324     "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
325     AC_MSG_CHECKING([for alias support in the linker])
326     LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
327     # We try to run the linker with this new ld flag. If the link fails,
328     # we give up and remove the new flag from LDFLAGS.
329 ph10 644 AC_LINK_IFELSE([AC_LANG_PROGRAM([namespace pcrecpp {
330 ph10 330 class RE { static int no_arg; };
331     int RE::no_arg;
332     }],
333 ph10 644 [])],
334 ph10 330 [AC_MSG_RESULT([yes]);
335     EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
336     break;],
337     AC_MSG_RESULT([no]))
338     done
339     LDFLAGS="$OLD_LDFLAGS"
340    
341 ph10 97 # We could be more clever here, given we're doing AC_SUBST with this
342 ph10 127 # (eg set a var to be the name of the include file we want). But we're not
343 ph10 97 # so it's easy to change back to 'regular' autoconf vars if we needed to.
344 nigel 87 AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
345     [pcre_have_cpp_headers="0"])
346     AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
347     [pcre_have_bits_type_traits="0"])
348     AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
349     [pcre_have_type_traits="0"])
350 ph10 330
351 ph10 486 # (This isn't c++-specific, but is only used in pcrecpp.cc, so try this
352     # in a c++ context. This matters becuase strtoimax is C99 and may not
353     # be supported by the C++ compiler.)
354     # Figure out how to create a longlong from a string: strtoll and
355     # equiv. It's not enough to call AC_CHECK_FUNCS: hpux has a
356     # strtoll, for instance, but it only takes 2 args instead of 3!
357     # We have to call AH_TEMPLATE since AC_DEFINE_UNQUOTED below is complex.
358     AH_TEMPLATE(HAVE_STRTOQ, [Define to 1 if you have `strtoq'.])
359     AH_TEMPLATE(HAVE_STRTOLL, [Define to 1 if you have `strtoll'.])
360     AH_TEMPLATE(HAVE__STRTOI64, [Define to 1 if you have `_strtoi64'.])
361     AH_TEMPLATE(HAVE_STRTOIMAX, [Define to 1 if you have `strtoimax'.])
362     have_strto_fn=0
363 ph10 506 for fn in strtoq strtoll _strtoi64 strtoimax; do
364 ph10 486 AC_MSG_CHECKING([for $fn])
365     if test "$fn" = strtoimax; then
366     include=stdint.h
367     else
368     include=stdlib.h
369     fi
370 ph10 644 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <$include>],
371     [char* e; return $fn("100", &e, 10)])],
372 ph10 486 [AC_MSG_RESULT(yes)
373     AC_DEFINE_UNQUOTED(HAVE_`echo $fn | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`, 1,
374     [Define to 1 if you have `$fn'.])
375     have_strto_fn=1
376     break],
377     [AC_MSG_RESULT(no)])
378     done
379    
380     if test "$have_strto_fn" = 1; then
381     AC_CHECK_TYPES([long long],
382     [pcre_have_long_long="1"],
383     [pcre_have_long_long="0"])
384     AC_CHECK_TYPES([unsigned long long],
385     [pcre_have_ulong_long="1"],
386     [pcre_have_ulong_long="0"])
387     else
388     pcre_have_long_long="0"
389     pcre_have_ulong_long="0"
390     fi
391     AC_SUBST(pcre_have_long_long)
392     AC_SUBST(pcre_have_ulong_long)
393    
394 ph10 97 AC_LANG_POP
395     fi
396     # Using AC_SUBST eliminates the need to include config.h in a public .h file
397     AC_SUBST(pcre_have_type_traits)
398 nigel 87 AC_SUBST(pcre_have_bits_type_traits)
399    
400 ph10 97 # Conditional compilation
401     AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
402 ph10 128 AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
403 nigel 87
404 ph10 97 # Checks for typedefs, structures, and compiler characteristics.
405 nigel 87
406     AC_C_CONST
407     AC_TYPE_SIZE_T
408    
409 ph10 97 # Checks for library functions.
410 nigel 87
411 ph10 321 AC_CHECK_FUNCS(bcopy memmove strerror)
412 nigel 87
413 ph10 286 # Check for the availability of libz (aka zlib)
414    
415     AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
416     AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
417    
418 ph10 478 # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
419     # as for libz. However, this had the following problem, diagnosed and fixed by
420     # a user:
421     #
422     # - libbz2 uses the Pascal calling convention (WINAPI) for the functions
423     # under Win32.
424     # - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",
425     # therefore missing the function definition.
426     # - The compiler thus generates a "C" signature for the test function.
427     # - The linker fails to find the "C" function.
428     # - PCRE fails to configure if asked to do so against libbz2.
429     #
430     # Solution:
431     #
432     # - Replace the AC_CHECK_LIB test with a custom test.
433 ph10 286
434     AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
435 ph10 478 # Original test
436     # AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
437     #
438     # Custom test follows
439 ph10 286
440 ph10 478 AC_MSG_CHECKING([for libbz2])
441     OLD_LIBS="$LIBS"
442     LIBS="$LIBS -lbz2"
443 ph10 644 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
444 ph10 478 #ifdef HAVE_BZLIB_H
445     #include <bzlib.h>
446     #endif]],
447 ph10 644 [[return (int)BZ2_bzopen("conftest", "rb");]])],
448 ph10 478 [AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],
449     AC_MSG_RESULT([no]))
450     LIBS="$OLD_LIBS"
451    
452 ph10 287 # Check for the availabiity of libreadline
453    
454     AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
455     AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
456     AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
457    
458 ph10 97 # This facilitates -ansi builds under Linux
459     dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
460 nigel 87
461 ph10 430 PCRE_STATIC_CFLAG=""
462 ph10 97 if test "x$enable_shared" = "xno" ; then
463     AC_DEFINE([PCRE_STATIC], [1], [
464     Define if linking statically (TODO: make nice with Libtool)])
465 ph10 430 PCRE_STATIC_CFLAG="-DPCRE_STATIC"
466 nigel 87 fi
467 ph10 430 AC_SUBST(PCRE_STATIC_CFLAG)
468 nigel 87
469 ph10 97 # Here is where pcre specific defines are handled
470 nigel 87
471 ph10 97 if test "$enable_utf8" = "yes"; then
472     AC_DEFINE([SUPPORT_UTF8], [], [
473 ph10 391 Define to enable support for the UTF-8 Unicode encoding. This will
474     work even in an EBCDIC environment, but it is incompatible with
475     the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
476     *or* ASCII/UTF-8, but not both at once.])
477 nigel 87 fi
478    
479 ph10 97 if test "$enable_unicode_properties" = "yes"; then
480     AC_DEFINE([SUPPORT_UCP], [], [
481     Define to enable support for Unicode properties])
482     fi
483 nigel 87
484 ph10 97 if test "$enable_stack_for_recursion" = "no"; then
485     AC_DEFINE([NO_RECURSE], [], [
486     PCRE uses recursive function calls to handle backtracking while
487 ph10 127 matching. This can sometimes be a problem on systems that have
488 ph10 100 stacks of limited size. Define NO_RECURSE to get a version that
489 ph10 97 doesn't use recursion in the match() function; instead it creates
490     its own stack by steam using pcre_recurse_malloc() to obtain memory
491     from the heap. For more detail, see the comments and other stuff
492     just above the match() function. On systems that support it,
493     "configure" can be used to set this in the Makefile
494     (use --disable-stack-for-recursion).])
495 nigel 87 fi
496    
497 ph10 286 if test "$enable_pcregrep_libz" = "yes"; then
498     AC_DEFINE([SUPPORT_LIBZ], [], [
499     Define to allow pcregrep to be linked with libz, so that it is
500     able to handle .gz files.])
501     fi
502    
503     if test "$enable_pcregrep_libbz2" = "yes"; then
504     AC_DEFINE([SUPPORT_LIBBZ2], [], [
505     Define to allow pcregrep to be linked with libbz2, so that it is
506     able to handle .bz2 files.])
507     fi
508    
509 ph10 644 if test $with_pcregrep_bufsize -lt 8192 ; then
510     with_pcregrep_bufsize="8192"
511     fi
512 ph10 654
513 ph10 644 AC_DEFINE_UNQUOTED([PCREGREP_BUFSIZE], [$with_pcregrep_bufsize], [
514     The value of PCREGREP_BUFSIZE determines the size of buffer used by
515     pcregrep to hold parts of the file it is searching. On systems that
516     support it, "configure" can be used to override the default, which is
517     8192. This is also the minimum value. The actual amount of memory used by
518     pcregrep is three times this number, because it allows for the buffering of
519     "before" and "after" lines.])
520    
521 ph10 287 if test "$enable_pcretest_libreadline" = "yes"; then
522     AC_DEFINE([SUPPORT_LIBREADLINE], [], [
523     Define to allow pcretest to be linked with libreadline.])
524 ph10 289 fi
525 ph10 287
526 ph10 97 AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
527 ph10 111 The value of NEWLINE determines the newline character sequence. On
528 ph10 231 systems that support it, "configure" can be used to override the
529     default, which is 10. The possible values are 10 (LF), 13 (CR),
530     3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
531 nigel 87
532 ph10 231 if test "$enable_bsr_anycrlf" = "yes"; then
533     AC_DEFINE([BSR_ANYCRLF], [], [
534     By default, the \R escape sequence matches any Unicode line ending
535     character or sequence of characters. If BSR_ANYCRLF is defined, this is
536     changed so that backslash-R matches only CR, LF, or CRLF. The build-
537     time default can be overridden by the user of PCRE at runtime. On
538     systems that support it, "configure" can be used to override the
539     default.])
540     fi
541    
542 ph10 97 AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
543     The value of LINK_SIZE determines the number of bytes used to store
544     links as offsets within the compiled regex. The default is 2, which
545     allows for compiled patterns up to 64K long. This covers the vast
546     majority of cases. However, PCRE can also be compiled to use 3 or 4
547     bytes instead. This allows for longer patterns in extreme cases. On
548     systems that support it, "configure" can be used to override this default.])
549 nigel 87
550 ph10 97 AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
551     When calling PCRE via the POSIX interface, additional working storage
552     is required for holding the pointers to capturing substrings because
553     PCRE requires three integers per substring, whereas the POSIX
554     interface provides only two. If the number of expected substrings is
555     small, the wrapper function uses space on the stack, because this is
556     faster than using malloc() for each call. The threshold above which
557     the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
558     systems that support it, "configure" can be used to override this
559     default.])
560 nigel 91
561 ph10 97 AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
562     The value of MATCH_LIMIT determines the default number of times the
563     internal match() function can be called during a single execution of
564 ph10 100 pcre_exec(). There is a runtime interface for setting a different
565 ph10 97 limit. The limit exists in order to catch runaway regular
566     expressions that take for ever to determine that they do not match.
567     The default is set very large so that it does not accidentally catch
568     legitimate cases. On systems that support it, "configure" can be
569     used to override this default default.])
570 nigel 91
571 ph10 97 AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
572     The above limit applies to all calls of match(), whether or not they
573     increase the recursion depth. In some environments it is desirable
574     to limit the depth of recursive calls of match() more strictly, in
575     order to restrict the maximum amount of stack (or heap, if
576     NO_RECURSE is defined) that is used. The value of
577     MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
578     have any useful effect, it must be less than the value of
579 ph10 111 MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
580     There is a runtime method for setting a different limit. On systems
581 ph10 100 that support it, "configure" can be used to override the default.])
582 nigel 93
583 ph10 97 AC_DEFINE([MAX_NAME_SIZE], [32], [
584     This limit is parameterized just in case anybody ever wants to
585     change it. Care must be taken if it is increased, because it guards
586     against integer overflow caused by enormously large patterns.])
587 nigel 93
588 ph10 97 AC_DEFINE([MAX_NAME_COUNT], [10000], [
589     This limit is parameterized just in case anybody ever wants to
590     change it. Care must be taken if it is increased, because it guards
591     against integer overflow caused by enormously large patterns.])
592 nigel 87
593 ph10 145 AH_VERBATIM([PCRE_EXP_DEFN], [
594 ph10 97 /* If you are compiling for a system other than a Unix-like system or
595     Win32, and it needs some magic to be inserted before the definition
596     of a function that is exported by the library, define this macro to
597     contain the relevant magic. If you do not define this macro, it
598     defaults to "extern" for a C compiler and "extern C" for a C++
599     compiler on non-Win32 systems. This macro apears at the start of
600     every exported function that is part of the external API. It does
601     not appear on functions that are "external" in the C sense, but
602     which are internal to the library. */
603 ph10 145 #undef PCRE_EXP_DEFN])
604 nigel 87
605 ph10 97 if test "$enable_ebcdic" = "yes"; then
606     AC_DEFINE_UNQUOTED([EBCDIC], [], [
607     If you are compiling for a system that uses EBCDIC instead of ASCII
608     character codes, define this macro as 1. On systems that can use
609 ph10 391 "configure", this can be done via --enable-ebcdic. PCRE will then
610 ph10 392 assume that all input strings are in EBCDIC. If you do not define
611     this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
612 ph10 391 It is not possible to build a version of PCRE that supports both
613     EBCDIC and UTF-8.])
614 nigel 87 fi
615    
616 ph10 97 # Platform specific issues
617     NO_UNDEFINED=
618     EXPORT_ALL_SYMBOLS=
619     case $host_os in
620     cygwin* | mingw* )
621     if test X"$enable_shared" = Xyes; then
622     NO_UNDEFINED="-no-undefined"
623     EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
624     fi
625     ;;
626     esac
627 nigel 87
628 ph10 97 # The extra LDFLAGS for each particular library
629     # (Note: The libpcre*_version bits are m4 variables, assigned above)
630 nigel 87
631 ph10 330 EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
632     $NO_UNDEFINED -version-info libpcre_version"
633 nigel 87
634 ph10 330 EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
635     $NO_UNDEFINED -version-info libpcreposix_version"
636 nigel 87
637 ph10 330 EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
638     $NO_UNDEFINED -version-info libpcrecpp_version \
639     $EXPORT_ALL_SYMBOLS"
640 nigel 87
641 ph10 97 AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
642     AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
643     AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
644 nigel 87
645 ph10 97 # When we run 'make distcheck', use these arguments.
646     DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
647     AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
648 nigel 87
649 ph10 286 # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
650 ph10 376 # specified, the relevant library is available.
651 ph10 286
652     if test "$enable_pcregrep_libz" = "yes"; then
653     if test "$HAVE_ZLIB_H" != "1"; then
654     echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
655     exit 1
656     fi
657     if test "$HAVE_LIBZ" != "1"; then
658     echo "** Cannot --enable-pcregrep-libz because libz was not found"
659     exit 1
660     fi
661 ph10 376 LIBZ="-lz"
662 ph10 286 fi
663 ph10 376 AC_SUBST(LIBZ)
664 ph10 286
665     if test "$enable_pcregrep_libbz2" = "yes"; then
666     if test "$HAVE_BZLIB_H" != "1"; then
667     echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
668     exit 1
669     fi
670     if test "$HAVE_LIBBZ2" != "1"; then
671     echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
672     exit 1
673     fi
674 ph10 376 LIBBZ2="-lbz2"
675 ph10 286 fi
676 ph10 376 AC_SUBST(LIBBZ2)
677 ph10 286
678 ph10 287 # Similarly for --enable-pcretest-readline
679    
680     if test "$enable_pcretest_libreadline" = "yes"; then
681     if test "$HAVE_READLINE_H" != "1"; then
682     echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
683     exit 1
684     fi
685     if test "$HAVE_HISTORY_H" != "1"; then
686     echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
687     exit 1
688     fi
689 ph10 376 LIBREADLINE="-lreadline"
690 ph10 289 fi
691 ph10 376 AC_SUBST(LIBREADLINE)
692 ph10 287
693 ph10 97 # Produce these files, in addition to config.h.
694     AC_CONFIG_FILES(
695     Makefile
696     libpcre.pc
697 ph10 423 libpcreposix.pc
698 ph10 97 libpcrecpp.pc
699     pcre-config
700     pcre.h
701     pcre_stringpiece.h
702     pcrecpparg.h
703 nigel 87 )
704    
705 ph10 97 # Make the generated script files executable.
706 ph10 137 AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
707 nigel 87
708 ph10 128 # Make sure that pcre_chartables.c is removed in case the method for
709     # creating it was changed by reconfiguration.
710 ph10 137 AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
711 ph10 128
712 ph10 137 AC_OUTPUT
713 ph10 128
714 ph10 97 # Print out a nice little message after configure is run displaying your
715     # chosen options.
716 ph10 286
717 ph10 97 cat <<EOF
718 nigel 87
719 ph10 97 $PACKAGE-$VERSION configuration summary:
720 nigel 87
721 ph10 287 Install prefix .................. : ${prefix}
722     C preprocessor .................. : ${CPP}
723     C compiler ...................... : ${CC}
724     C++ preprocessor ................ : ${CXXCPP}
725     C++ compiler .................... : ${CXX}
726     Linker .......................... : ${LD}
727     C preprocessor flags ............ : ${CPPFLAGS}
728     C compiler flags ................ : ${CFLAGS}
729     C++ compiler flags .............. : ${CXXFLAGS}
730     Linker flags .................... : ${LDFLAGS}
731     Extra libraries ................. : ${LIBS}
732 ph10 289
733 ph10 287 Build C++ library ............... : ${enable_cpp}
734     Enable UTF-8 support ............ : ${enable_utf8}
735     Unicode properties .............. : ${enable_unicode_properties}
736     Newline char/sequence ........... : ${enable_newline}
737     \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
738     EBCDIC coding ................... : ${enable_ebcdic}
739     Rebuild char tables ............. : ${enable_rebuild_chartables}
740     Use stack recursion ............. : ${enable_stack_for_recursion}
741     POSIX mem threshold ............. : ${with_posix_malloc_threshold}
742     Internal link size .............. : ${with_link_size}
743     Match limit ..................... : ${with_match_limit}
744     Match limit recursion ........... : ${with_match_limit_recursion}
745     Build shared libs ............... : ${enable_shared}
746     Build static libs ............... : ${enable_static}
747 ph10 654 Buffer size for pcregrep ........ : ${with_pcregrep_bufsize}
748 ph10 287 Link pcregrep with libz ......... : ${enable_pcregrep_libz}
749     Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
750 ph10 289 Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
751 nigel 87
752 ph10 97 EOF
753 nigel 87
754 ph10 97 dnl end configure.ac

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