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Revision 475 - (hide annotations) (download)
Sat Jan 2 18:21:30 2010 UTC (4 years, 6 months ago) by ph10
File size: 25219 byte(s)
Tidies to allow easier embedded compilation; avoid (double) where possible.

1 nigel 87 dnl Process this file with autoconf to produce a configure script.
2    
3 ph10 99 dnl NOTE FOR MAINTAINERS: Do not use major or minor version numbers with
4     dnl leading zeros, because they may be treated as octal constants. The
5     dnl PCRE_PRERELEASE feature is for identifying release candidates. It might
6     dnl be defined as -RC2, for example. For real releases, it should be defined
7     dnl empty.
8    
9 ph10 418 m4_define(pcre_major, [8])
10 ph10 471 m4_define(pcre_minor, [01])
11 ph10 464 m4_define(pcre_prerelease, [])
12 ph10 475 m4_define(pcre_date, [2010-01-02])
13 nigel 87
14 ph10 97 # Libtool shared library interface versions (current:revision:age)
15     m4_define(libpcre_version, [0:1:0])
16     m4_define(libpcreposix_version, [0:0:0])
17     m4_define(libpcrecpp_version, [0:0:0])
18 nigel 87
19 ph10 97 AC_PREREQ(2.57)
20     AC_INIT(PCRE, pcre_major.pcre_minor[]pcre_prerelease, , pcre)
21     AC_CONFIG_SRCDIR([pcre.h.in])
22     AM_INIT_AUTOMAKE([dist-bzip2 dist-zip])
23     AC_CONFIG_HEADERS(config.h)
24 ph10 159
25     # The default CFLAGS and CXXFLAGS in Autoconf are "-g -O2" for gcc and just
26     # "-g" for any other compiler. There doesn't seem to be a standard way of
27     # getting rid of the -g (which I don't think is needed for a production
28     # library). This fudge seems to achieve the necessary. First, we remember the
29     # externally set values of CFLAGS and CXXFLAGS. Then call the AC_PROG_CC and
30     # AC_PROG_CXX macros to find the compilers - if CFLAGS and CXXFLAGS are not
31     # set, they will be set to Autoconf's defaults. Afterwards, if the original
32     # values were not set, remove the -g from the Autoconf defaults.
33     # (PH 02-May-07)
34    
35     remember_set_CFLAGS="$CFLAGS"
36     remember_set_CXXFLAGS="$CXXFLAGS"
37    
38 ph10 97 AC_PROG_CC
39     AC_PROG_CXX
40 ph10 159
41     if test "x$remember_set_CFLAGS" = "x"
42     then
43     if test "$CFLAGS" = "-g -O2"
44     then
45     CFLAGS="-O2"
46     elif test "$CFLAGS" = "-g"
47     then
48     CFLAGS=""
49     fi
50     fi
51    
52     if test "x$remember_set_CXXFLAGS" = "x"
53     then
54     if test "$CXXFLAGS" = "-g -O2"
55     then
56     CXXFLAGS="-O2"
57     elif test "$CXXFLAGS" = "-g"
58     then
59     CXXFLAGS=""
60     fi
61     fi
62    
63 ph10 330 # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
64     # Check for that case, and just disable c++ code if g++ doesn't run.
65     AC_LANG_PUSH(C++)
66     AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
67     AC_LANG_POP
68 ph10 159
69 ph10 475 # Check for a 64-bit integer type
70     AC_TYPE_INT64_T
71    
72 ph10 97 AC_PROG_INSTALL
73     AC_LIBTOOL_WIN32_DLL
74     AC_PROG_LIBTOOL
75 ph10 137 AC_PROG_LN_S
76 nigel 87
77 ph10 97 PCRE_MAJOR="pcre_major"
78     PCRE_MINOR="pcre_minor"
79     PCRE_PRERELEASE="pcre_prerelease"
80     PCRE_DATE="pcre_date"
81 nigel 87
82 ph10 97 AC_SUBST(PCRE_MAJOR)
83     AC_SUBST(PCRE_MINOR)
84     AC_SUBST(PCRE_PRERELEASE)
85     AC_SUBST(PCRE_DATE)
86 nigel 87
87 ph10 97 # Set a more sensible default value for $(htmldir).
88     if test "x$htmldir" = 'x${docdir}'
89     then
90     htmldir='${docdir}/html'
91     fi
92 nigel 87
93 ph10 97 # Handle --disable-cpp
94     AC_ARG_ENABLE(cpp,
95     AS_HELP_STRING([--disable-cpp],
96     [disable C++ support]),
97     , enable_cpp=yes)
98 nigel 87
99 ph10 128 # Handle --enable-rebuild-chartables
100     AC_ARG_ENABLE(rebuild-chartables,
101     AS_HELP_STRING([--enable-rebuild-chartables],
102     [rebuild character tables in current locale]),
103     , enable_rebuild_chartables=no)
104    
105 ph10 97 # Handle --enable-utf8 (disabled by default)
106     AC_ARG_ENABLE(utf8,
107     AS_HELP_STRING([--enable-utf8],
108 ph10 391 [enable UTF-8 support (incompatible with --enable-ebcdic)]),
109 ph10 97 , enable_utf8=unset)
110 nigel 87
111 ph10 97 # Handle --enable-unicode-properties
112     AC_ARG_ENABLE(unicode-properties,
113     AS_HELP_STRING([--enable-unicode-properties],
114     [enable Unicode properties support (implies --enable-utf8)]),
115     , enable_unicode_properties=no)
116 nigel 87
117 ph10 97 # Handle --enable-newline=NL
118     dnl AC_ARG_ENABLE(newline,
119     dnl AS_HELP_STRING([--enable-newline=NL],
120 ph10 149 dnl [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
121 ph10 97 dnl , enable_newline=lf)
122 nigel 87
123 ph10 97 # Separate newline options
124     ac_pcre_newline=lf
125     AC_ARG_ENABLE(newline-is-cr,
126     AS_HELP_STRING([--enable-newline-is-cr],
127     [use CR as newline character]),
128     ac_pcre_newline=cr)
129     AC_ARG_ENABLE(newline-is-lf,
130     AS_HELP_STRING([--enable-newline-is-lf],
131     [use LF as newline character (default)]),
132     ac_pcre_newline=lf)
133     AC_ARG_ENABLE(newline-is-crlf,
134     AS_HELP_STRING([--enable-newline-is-crlf],
135     [use CRLF as newline sequence]),
136     ac_pcre_newline=crlf)
137 ph10 149 AC_ARG_ENABLE(newline-is-anycrlf,
138     AS_HELP_STRING([--enable-newline-is-anycrlf],
139     [use CR, LF, or CRLF as newline sequence]),
140     ac_pcre_newline=anycrlf)
141 ph10 97 AC_ARG_ENABLE(newline-is-any,
142     AS_HELP_STRING([--enable-newline-is-any],
143     [use any valid Unicode newline sequence]),
144     ac_pcre_newline=any)
145     enable_newline="$ac_pcre_newline"
146 nigel 87
147 ph10 231 # Handle --enable-bsr-anycrlf
148     AC_ARG_ENABLE(bsr-anycrlf,
149     AS_HELP_STRING([--enable-bsr-anycrlf],
150     [\R matches only CR, LF, CRLF by default]),
151     , enable_bsr_anycrlf=no)
152    
153 ph10 97 # Handle --enable-ebcdic
154     AC_ARG_ENABLE(ebcdic,
155     AS_HELP_STRING([--enable-ebcdic],
156 ph10 391 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
157 ph10 97 , enable_ebcdic=no)
158 nigel 87
159 ph10 97 # Handle --disable-stack-for-recursion
160     AC_ARG_ENABLE(stack-for-recursion,
161     AS_HELP_STRING([--disable-stack-for-recursion],
162     [don't use stack recursion when matching]),
163     , enable_stack_for_recursion=yes)
164 nigel 87
165 ph10 286 # Handle --enable-pcregrep-libz
166     AC_ARG_ENABLE(pcregrep-libz,
167     AS_HELP_STRING([--enable-pcregrep-libz],
168     [link pcregrep with libz to handle .gz files]),
169     , enable_pcregrep_libz=no)
170    
171     # Handle --enable-pcregrep-libbz2
172     AC_ARG_ENABLE(pcregrep-libbz2,
173     AS_HELP_STRING([--enable-pcregrep-libbz2],
174     [link pcregrep with libbz2 to handle .bz2 files]),
175     , enable_pcregrep_libbz2=no)
176    
177 ph10 287 # Handle --enable-pcretest-libreadline
178     AC_ARG_ENABLE(pcretest-libreadline,
179     AS_HELP_STRING([--enable-pcretest-libreadline],
180     [link pcretest with libreadline]),
181     , enable_pcretest_libreadline=no)
182    
183 ph10 97 # Handle --with-posix-malloc-threshold=NBYTES
184     AC_ARG_WITH(posix-malloc-threshold,
185     AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
186     [threshold for POSIX malloc usage (default=10)]),
187     , with_posix_malloc_threshold=10)
188 nigel 87
189 ph10 97 # Handle --with-link-size=N
190     AC_ARG_WITH(link-size,
191     AS_HELP_STRING([--with-link-size=N],
192     [internal link size (2, 3, or 4 allowed; default=2)]),
193     , with_link_size=2)
194 nigel 87
195 ph10 97 # Handle --with-match-limit=N
196     AC_ARG_WITH(match-limit,
197     AS_HELP_STRING([--with-match-limit=N],
198     [default limit on internal looping (default=10000000)]),
199     , with_match_limit=10000000)
200 nigel 87
201 ph10 97 # Handle --with-match-limit_recursion=N
202     #
203     # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
204     # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
205     # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
206     # different numeric value (or even the same numeric value as MATCH_LIMIT,
207     # though no longer defined in terms of the latter).
208     #
209     AC_ARG_WITH(match-limit-recursion,
210     AS_HELP_STRING([--with-match-limit-recursion=N],
211     [default limit on internal recursion (default=MATCH_LIMIT)]),
212     , with_match_limit_recursion=MATCH_LIMIT)
213 nigel 87
214 ph10 97 # Make sure that if enable_unicode_properties was set, that UTF-8 support
215     # is enabled.
216     #
217     if test "x$enable_unicode_properties" = "xyes"
218     then
219     if test "x$enable_utf8" = "xno"
220     then
221     AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
222     fi
223     enable_utf8=yes
224     fi
225 nigel 87
226 ph10 97 if test "x$enable_utf8" = "xunset"
227     then
228     enable_utf8=no
229     fi
230 nigel 87
231 ph10 128 # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
232 ph10 391 # Also check that UTF-8 support is not requested, because PCRE cannot handle
233     # EBCDIC and UTF-8 in the same build. To do so it would need to use different
234     # character constants depending on the mode.
235 ph10 128 #
236 ph10 137 if test "x$enable_ebcdic" = "xyes"
237 ph10 128 then
238     enable_rebuild_chartables=yes
239 ph10 391 if test "x$enable_utf8" = "xyes"
240     then
241     AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
242     fi
243 ph10 128 fi
244    
245 ph10 97 # Convert the newline identifier into the appropriate integer value.
246     case "$enable_newline" in
247 ph10 149 lf) ac_pcre_newline_value=10 ;;
248     cr) ac_pcre_newline_value=13 ;;
249     crlf) ac_pcre_newline_value=3338 ;;
250 ph10 150 anycrlf) ac_pcre_newline_value=-2 ;;
251 ph10 149 any) ac_pcre_newline_value=-1 ;;
252 ph10 97 *)
253     AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
254     ;;
255     esac
256 nigel 87
257 ph10 97 # Check argument to --with-link-size
258     case "$with_link_size" in
259     2|3|4) ;;
260     *)
261     AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
262     ;;
263     esac
264 nigel 87
265 ph10 97 AH_TOP([
266 ph10 100 /* On Unix-like systems config.h.in is converted by "configure" into config.h.
267     Some other environments also support the use of "configure". PCRE is written in
268     Standard C, but there are a few non-standard things it can cope with, allowing
269     it to run on SunOS4 and other "close to standard" systems.
270 nigel 87
271 ph10 111 If you are going to build PCRE "by hand" on a system without "configure" you
272     should copy the distributed config.h.generic to config.h, and then set up the
273 ph10 237 macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
274     all of your compile commands, so that config.h is included at the start of
275     every source.
276 nigel 87
277 ph10 237 Alternatively, you can avoid editing by using -D on the compiler command line
278     to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
279    
280 ph10 111 PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
281     HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
282     them both to 0; an emulation function will be used. */])
283 ph10 100
284 ph10 97 # Checks for header files.
285 nigel 87 AC_HEADER_STDC
286 ph10 97 AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
287 nigel 87
288 ph10 97 # The files below are C++ header files.
289     pcre_have_type_traits="0"
290     pcre_have_bits_type_traits="0"
291     if test "x$enable_cpp" = "xyes" -a -n "$CXX"
292 nigel 87 then
293 ph10 97 AC_LANG_PUSH(C++)
294 nigel 87
295 ph10 330 # Older versions of pcre defined pcrecpp::no_arg, but in new versions
296     # it's called pcrecpp::RE::no_arg. For backwards ABI compatibility,
297     # we want to make one an alias for the other. Different systems do
298     # this in different ways. Some systems, for instance, can do it via
299     # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
300     OLD_LDFLAGS="$LDFLAGS"
301     for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
302     "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
303     AC_MSG_CHECKING([for alias support in the linker])
304     LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
305     # We try to run the linker with this new ld flag. If the link fails,
306     # we give up and remove the new flag from LDFLAGS.
307     AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
308     class RE { static int no_arg; };
309     int RE::no_arg;
310     }],
311     []),
312     [AC_MSG_RESULT([yes]);
313     EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
314     break;],
315     AC_MSG_RESULT([no]))
316     done
317     LDFLAGS="$OLD_LDFLAGS"
318    
319 ph10 97 # We could be more clever here, given we're doing AC_SUBST with this
320 ph10 127 # (eg set a var to be the name of the include file we want). But we're not
321 ph10 97 # so it's easy to change back to 'regular' autoconf vars if we needed to.
322 nigel 87 AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
323     [pcre_have_cpp_headers="0"])
324     AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
325     [pcre_have_bits_type_traits="0"])
326     AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
327     [pcre_have_type_traits="0"])
328 ph10 330
329 ph10 97 AC_LANG_POP
330     fi
331     # Using AC_SUBST eliminates the need to include config.h in a public .h file
332     AC_SUBST(pcre_have_type_traits)
333 nigel 87 AC_SUBST(pcre_have_bits_type_traits)
334    
335 ph10 97 # Conditional compilation
336     AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
337 ph10 128 AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
338 nigel 87
339 ph10 97 # Checks for typedefs, structures, and compiler characteristics.
340 nigel 87
341     AC_C_CONST
342     AC_TYPE_SIZE_T
343    
344 ph10 321 pcre_have_strotolonglong=0
345     AC_CHECK_FUNCS(strtoq strtoll _strtoi64, [pcre_have_strotolonglong="1"; break])
346     # If we can't convert a string to a long long, pretend we don't even
347     # have a long long.
348     if test $pcre_have_strotolonglong = "0"; then
349     pcre_have_long_long="0"
350     pcre_have_ulong_long="0"
351     else
352     AC_CHECK_TYPES([long long],
353     [pcre_have_long_long="1"],
354     [pcre_have_long_long="0"])
355     AC_CHECK_TYPES([unsigned long long],
356     [pcre_have_ulong_long="1"],
357     [pcre_have_ulong_long="0"])
358     fi
359 nigel 87 AC_SUBST(pcre_have_long_long)
360     AC_SUBST(pcre_have_ulong_long)
361    
362 ph10 97 # Checks for library functions.
363 nigel 87
364 ph10 321 AC_CHECK_FUNCS(bcopy memmove strerror)
365 nigel 87
366 ph10 286 # Check for the availability of libz (aka zlib)
367    
368     AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
369     AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
370    
371     # Check for the availability of libbz2
372    
373     AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
374     AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
375    
376 ph10 287 # Check for the availabiity of libreadline
377    
378     AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
379     AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
380     AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
381    
382 ph10 97 # This facilitates -ansi builds under Linux
383     dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
384 nigel 87
385 ph10 430 PCRE_STATIC_CFLAG=""
386 ph10 97 if test "x$enable_shared" = "xno" ; then
387     AC_DEFINE([PCRE_STATIC], [1], [
388     Define if linking statically (TODO: make nice with Libtool)])
389 ph10 430 PCRE_STATIC_CFLAG="-DPCRE_STATIC"
390 nigel 87 fi
391 ph10 430 AC_SUBST(PCRE_STATIC_CFLAG)
392 nigel 87
393 ph10 97 # Here is where pcre specific defines are handled
394 nigel 87
395 ph10 97 if test "$enable_utf8" = "yes"; then
396     AC_DEFINE([SUPPORT_UTF8], [], [
397 ph10 391 Define to enable support for the UTF-8 Unicode encoding. This will
398     work even in an EBCDIC environment, but it is incompatible with
399     the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
400     *or* ASCII/UTF-8, but not both at once.])
401 nigel 87 fi
402    
403 ph10 97 if test "$enable_unicode_properties" = "yes"; then
404     AC_DEFINE([SUPPORT_UCP], [], [
405     Define to enable support for Unicode properties])
406     fi
407 nigel 87
408 ph10 97 if test "$enable_stack_for_recursion" = "no"; then
409     AC_DEFINE([NO_RECURSE], [], [
410     PCRE uses recursive function calls to handle backtracking while
411 ph10 127 matching. This can sometimes be a problem on systems that have
412 ph10 100 stacks of limited size. Define NO_RECURSE to get a version that
413 ph10 97 doesn't use recursion in the match() function; instead it creates
414     its own stack by steam using pcre_recurse_malloc() to obtain memory
415     from the heap. For more detail, see the comments and other stuff
416     just above the match() function. On systems that support it,
417     "configure" can be used to set this in the Makefile
418     (use --disable-stack-for-recursion).])
419 nigel 87 fi
420    
421 ph10 286 if test "$enable_pcregrep_libz" = "yes"; then
422     AC_DEFINE([SUPPORT_LIBZ], [], [
423     Define to allow pcregrep to be linked with libz, so that it is
424     able to handle .gz files.])
425     fi
426    
427     if test "$enable_pcregrep_libbz2" = "yes"; then
428     AC_DEFINE([SUPPORT_LIBBZ2], [], [
429     Define to allow pcregrep to be linked with libbz2, so that it is
430     able to handle .bz2 files.])
431     fi
432    
433 ph10 287 if test "$enable_pcretest_libreadline" = "yes"; then
434     AC_DEFINE([SUPPORT_LIBREADLINE], [], [
435     Define to allow pcretest to be linked with libreadline.])
436 ph10 289 fi
437 ph10 287
438 ph10 97 AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
439 ph10 111 The value of NEWLINE determines the newline character sequence. On
440 ph10 231 systems that support it, "configure" can be used to override the
441     default, which is 10. The possible values are 10 (LF), 13 (CR),
442     3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
443 nigel 87
444 ph10 231 if test "$enable_bsr_anycrlf" = "yes"; then
445     AC_DEFINE([BSR_ANYCRLF], [], [
446     By default, the \R escape sequence matches any Unicode line ending
447     character or sequence of characters. If BSR_ANYCRLF is defined, this is
448     changed so that backslash-R matches only CR, LF, or CRLF. The build-
449     time default can be overridden by the user of PCRE at runtime. On
450     systems that support it, "configure" can be used to override the
451     default.])
452     fi
453    
454 ph10 97 AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
455     The value of LINK_SIZE determines the number of bytes used to store
456     links as offsets within the compiled regex. The default is 2, which
457     allows for compiled patterns up to 64K long. This covers the vast
458     majority of cases. However, PCRE can also be compiled to use 3 or 4
459     bytes instead. This allows for longer patterns in extreme cases. On
460     systems that support it, "configure" can be used to override this default.])
461 nigel 87
462 ph10 97 AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
463     When calling PCRE via the POSIX interface, additional working storage
464     is required for holding the pointers to capturing substrings because
465     PCRE requires three integers per substring, whereas the POSIX
466     interface provides only two. If the number of expected substrings is
467     small, the wrapper function uses space on the stack, because this is
468     faster than using malloc() for each call. The threshold above which
469     the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
470     systems that support it, "configure" can be used to override this
471     default.])
472 nigel 91
473 ph10 97 AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
474     The value of MATCH_LIMIT determines the default number of times the
475     internal match() function can be called during a single execution of
476 ph10 100 pcre_exec(). There is a runtime interface for setting a different
477 ph10 97 limit. The limit exists in order to catch runaway regular
478     expressions that take for ever to determine that they do not match.
479     The default is set very large so that it does not accidentally catch
480     legitimate cases. On systems that support it, "configure" can be
481     used to override this default default.])
482 nigel 91
483 ph10 97 AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
484     The above limit applies to all calls of match(), whether or not they
485     increase the recursion depth. In some environments it is desirable
486     to limit the depth of recursive calls of match() more strictly, in
487     order to restrict the maximum amount of stack (or heap, if
488     NO_RECURSE is defined) that is used. The value of
489     MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
490     have any useful effect, it must be less than the value of
491 ph10 111 MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
492     There is a runtime method for setting a different limit. On systems
493 ph10 100 that support it, "configure" can be used to override the default.])
494 nigel 93
495 ph10 97 AC_DEFINE([MAX_NAME_SIZE], [32], [
496     This limit is parameterized just in case anybody ever wants to
497     change it. Care must be taken if it is increased, because it guards
498     against integer overflow caused by enormously large patterns.])
499 nigel 93
500 ph10 97 AC_DEFINE([MAX_NAME_COUNT], [10000], [
501     This limit is parameterized just in case anybody ever wants to
502     change it. Care must be taken if it is increased, because it guards
503     against integer overflow caused by enormously large patterns.])
504 nigel 87
505 ph10 145 AH_VERBATIM([PCRE_EXP_DEFN], [
506 ph10 97 /* If you are compiling for a system other than a Unix-like system or
507     Win32, and it needs some magic to be inserted before the definition
508     of a function that is exported by the library, define this macro to
509     contain the relevant magic. If you do not define this macro, it
510     defaults to "extern" for a C compiler and "extern C" for a C++
511     compiler on non-Win32 systems. This macro apears at the start of
512     every exported function that is part of the external API. It does
513     not appear on functions that are "external" in the C sense, but
514     which are internal to the library. */
515 ph10 145 #undef PCRE_EXP_DEFN])
516 nigel 87
517 ph10 97 if test "$enable_ebcdic" = "yes"; then
518     AC_DEFINE_UNQUOTED([EBCDIC], [], [
519     If you are compiling for a system that uses EBCDIC instead of ASCII
520     character codes, define this macro as 1. On systems that can use
521 ph10 391 "configure", this can be done via --enable-ebcdic. PCRE will then
522 ph10 392 assume that all input strings are in EBCDIC. If you do not define
523     this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
524 ph10 391 It is not possible to build a version of PCRE that supports both
525     EBCDIC and UTF-8.])
526 nigel 87 fi
527    
528 ph10 97 # Platform specific issues
529     NO_UNDEFINED=
530     EXPORT_ALL_SYMBOLS=
531     case $host_os in
532     cygwin* | mingw* )
533     if test X"$enable_shared" = Xyes; then
534     NO_UNDEFINED="-no-undefined"
535     EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
536     fi
537     ;;
538     esac
539 nigel 87
540 ph10 97 # The extra LDFLAGS for each particular library
541     # (Note: The libpcre*_version bits are m4 variables, assigned above)
542 nigel 87
543 ph10 330 EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
544     $NO_UNDEFINED -version-info libpcre_version"
545 nigel 87
546 ph10 330 EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
547     $NO_UNDEFINED -version-info libpcreposix_version"
548 nigel 87
549 ph10 330 EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
550     $NO_UNDEFINED -version-info libpcrecpp_version \
551     $EXPORT_ALL_SYMBOLS"
552 nigel 87
553 ph10 97 AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
554     AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
555     AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
556 nigel 87
557 ph10 97 # When we run 'make distcheck', use these arguments.
558     DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
559     AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
560 nigel 87
561 ph10 286 # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
562 ph10 376 # specified, the relevant library is available.
563 ph10 286
564     if test "$enable_pcregrep_libz" = "yes"; then
565     if test "$HAVE_ZLIB_H" != "1"; then
566     echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
567     exit 1
568     fi
569     if test "$HAVE_LIBZ" != "1"; then
570     echo "** Cannot --enable-pcregrep-libz because libz was not found"
571     exit 1
572     fi
573 ph10 376 LIBZ="-lz"
574 ph10 286 fi
575 ph10 376 AC_SUBST(LIBZ)
576 ph10 286
577     if test "$enable_pcregrep_libbz2" = "yes"; then
578     if test "$HAVE_BZLIB_H" != "1"; then
579     echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
580     exit 1
581     fi
582     if test "$HAVE_LIBBZ2" != "1"; then
583     echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
584     exit 1
585     fi
586 ph10 376 LIBBZ2="-lbz2"
587 ph10 286 fi
588 ph10 376 AC_SUBST(LIBBZ2)
589 ph10 286
590 ph10 287 # Similarly for --enable-pcretest-readline
591    
592     if test "$enable_pcretest_libreadline" = "yes"; then
593     if test "$HAVE_READLINE_H" != "1"; then
594     echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
595     exit 1
596     fi
597     if test "$HAVE_HISTORY_H" != "1"; then
598     echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
599     exit 1
600     fi
601 ph10 376 LIBREADLINE="-lreadline"
602 ph10 289 fi
603 ph10 376 AC_SUBST(LIBREADLINE)
604 ph10 287
605 ph10 97 # Produce these files, in addition to config.h.
606     AC_CONFIG_FILES(
607     Makefile
608     libpcre.pc
609 ph10 423 libpcreposix.pc
610 ph10 97 libpcrecpp.pc
611     pcre-config
612     pcre.h
613     pcre_stringpiece.h
614     pcrecpparg.h
615 nigel 87 )
616    
617 ph10 97 # Make the generated script files executable.
618 ph10 137 AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
619 nigel 87
620 ph10 128 # Make sure that pcre_chartables.c is removed in case the method for
621     # creating it was changed by reconfiguration.
622 ph10 137 AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
623 ph10 128
624 ph10 137 AC_OUTPUT
625 ph10 128
626 ph10 97 # Print out a nice little message after configure is run displaying your
627     # chosen options.
628 ph10 286
629 ph10 97 cat <<EOF
630 nigel 87
631 ph10 97 $PACKAGE-$VERSION configuration summary:
632 nigel 87
633 ph10 287 Install prefix .................. : ${prefix}
634     C preprocessor .................. : ${CPP}
635     C compiler ...................... : ${CC}
636     C++ preprocessor ................ : ${CXXCPP}
637     C++ compiler .................... : ${CXX}
638     Linker .......................... : ${LD}
639     C preprocessor flags ............ : ${CPPFLAGS}
640     C compiler flags ................ : ${CFLAGS}
641     C++ compiler flags .............. : ${CXXFLAGS}
642     Linker flags .................... : ${LDFLAGS}
643     Extra libraries ................. : ${LIBS}
644 ph10 289
645 ph10 287 Build C++ library ............... : ${enable_cpp}
646     Enable UTF-8 support ............ : ${enable_utf8}
647     Unicode properties .............. : ${enable_unicode_properties}
648     Newline char/sequence ........... : ${enable_newline}
649     \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
650     EBCDIC coding ................... : ${enable_ebcdic}
651     Rebuild char tables ............. : ${enable_rebuild_chartables}
652     Use stack recursion ............. : ${enable_stack_for_recursion}
653     POSIX mem threshold ............. : ${with_posix_malloc_threshold}
654     Internal link size .............. : ${with_link_size}
655     Match limit ..................... : ${with_match_limit}
656     Match limit recursion ........... : ${with_match_limit_recursion}
657     Build shared libs ............... : ${enable_shared}
658     Build static libs ............... : ${enable_static}
659     Link pcregrep with libz ......... : ${enable_pcregrep_libz}
660     Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
661 ph10 289 Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
662 nigel 87
663 ph10 97 EOF
664 nigel 87
665 ph10 97 dnl end configure.ac

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