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Revision 475 - (show annotations) (download)
Sat Jan 2 18:21:30 2010 UTC (4 years, 9 months ago) by ph10
File size: 25219 byte(s)
Tidies to allow easier embedded compilation; avoid (double) where possible.

1 dnl Process this file with autoconf to produce a configure script.
2
3 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 m4_define(pcre_major, [8])
10 m4_define(pcre_minor, [01])
11 m4_define(pcre_prerelease, [])
12 m4_define(pcre_date, [2010-01-02])
13
14 # 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
19 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
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 AC_PROG_CC
39 AC_PROG_CXX
40
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 # 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
69 # Check for a 64-bit integer type
70 AC_TYPE_INT64_T
71
72 AC_PROG_INSTALL
73 AC_LIBTOOL_WIN32_DLL
74 AC_PROG_LIBTOOL
75 AC_PROG_LN_S
76
77 PCRE_MAJOR="pcre_major"
78 PCRE_MINOR="pcre_minor"
79 PCRE_PRERELEASE="pcre_prerelease"
80 PCRE_DATE="pcre_date"
81
82 AC_SUBST(PCRE_MAJOR)
83 AC_SUBST(PCRE_MINOR)
84 AC_SUBST(PCRE_PRERELEASE)
85 AC_SUBST(PCRE_DATE)
86
87 # Set a more sensible default value for $(htmldir).
88 if test "x$htmldir" = 'x${docdir}'
89 then
90 htmldir='${docdir}/html'
91 fi
92
93 # Handle --disable-cpp
94 AC_ARG_ENABLE(cpp,
95 AS_HELP_STRING([--disable-cpp],
96 [disable C++ support]),
97 , enable_cpp=yes)
98
99 # 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 # Handle --enable-utf8 (disabled by default)
106 AC_ARG_ENABLE(utf8,
107 AS_HELP_STRING([--enable-utf8],
108 [enable UTF-8 support (incompatible with --enable-ebcdic)]),
109 , enable_utf8=unset)
110
111 # 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
117 # Handle --enable-newline=NL
118 dnl AC_ARG_ENABLE(newline,
119 dnl AS_HELP_STRING([--enable-newline=NL],
120 dnl [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
121 dnl , enable_newline=lf)
122
123 # 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 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 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
147 # 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 # Handle --enable-ebcdic
154 AC_ARG_ENABLE(ebcdic,
155 AS_HELP_STRING([--enable-ebcdic],
156 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
157 , enable_ebcdic=no)
158
159 # 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
165 # 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 # 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 # 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
189 # 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
195 # 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
201 # 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
214 # 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$enable_utf8" = "xno"
220 then
221 AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
222 fi
223 enable_utf8=yes
224 fi
225
226 if test "x$enable_utf8" = "xunset"
227 then
228 enable_utf8=no
229 fi
230
231 # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
232 # 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 #
236 if test "x$enable_ebcdic" = "xyes"
237 then
238 enable_rebuild_chartables=yes
239 if test "x$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 fi
244
245 # Convert the newline identifier into the appropriate integer value.
246 case "$enable_newline" in
247 lf) ac_pcre_newline_value=10 ;;
248 cr) ac_pcre_newline_value=13 ;;
249 crlf) ac_pcre_newline_value=3338 ;;
250 anycrlf) ac_pcre_newline_value=-2 ;;
251 any) ac_pcre_newline_value=-1 ;;
252 *)
253 AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
254 ;;
255 esac
256
257 # 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
265 AH_TOP([
266 /* 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
271 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 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
277 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 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
284 # Checks for header files.
285 AC_HEADER_STDC
286 AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
287
288 # 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 then
293 AC_LANG_PUSH(C++)
294
295 # 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 # We could be more clever here, given we're doing AC_SUBST with this
320 # (eg set a var to be the name of the include file we want). But we're not
321 # so it's easy to change back to 'regular' autoconf vars if we needed to.
322 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
329 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 AC_SUBST(pcre_have_bits_type_traits)
334
335 # Conditional compilation
336 AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
337 AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
338
339 # Checks for typedefs, structures, and compiler characteristics.
340
341 AC_C_CONST
342 AC_TYPE_SIZE_T
343
344 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 $pcre_have_strotolonglong = "0"; then
349 pcre_have_long_long="0"
350 pcre_have_ulong_long="0"
351 else
352 AC_CHECK_TYPES([long long],
353 [pcre_have_long_long="1"],
354 [pcre_have_long_long="0"])
355 AC_CHECK_TYPES([unsigned long long],
356 [pcre_have_ulong_long="1"],
357 [pcre_have_ulong_long="0"])
358 fi
359 AC_SUBST(pcre_have_long_long)
360 AC_SUBST(pcre_have_ulong_long)
361
362 # Checks for library functions.
363
364 AC_CHECK_FUNCS(bcopy memmove strerror)
365
366 # Check for the availability of libz (aka zlib)
367
368 AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
369 AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
370
371 # Check for the availability of libbz2
372
373 AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
374 AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
375
376 # Check for the availabiity of libreadline
377
378 AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
379 AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
380 AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
381
382 # This facilitates -ansi builds under Linux
383 dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
384
385 PCRE_STATIC_CFLAG=""
386 if test "x$enable_shared" = "xno" ; then
387 AC_DEFINE([PCRE_STATIC], [1], [
388 Define if linking statically (TODO: make nice with Libtool)])
389 PCRE_STATIC_CFLAG="-DPCRE_STATIC"
390 fi
391 AC_SUBST(PCRE_STATIC_CFLAG)
392
393 # Here is where pcre specific defines are handled
394
395 if test "$enable_utf8" = "yes"; then
396 AC_DEFINE([SUPPORT_UTF8], [], [
397 Define to enable support for the UTF-8 Unicode encoding. This will
398 work even in an EBCDIC environment, but it is incompatible with
399 the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
400 *or* ASCII/UTF-8, but not both at once.])
401 fi
402
403 if test "$enable_unicode_properties" = "yes"; then
404 AC_DEFINE([SUPPORT_UCP], [], [
405 Define to enable support for Unicode properties])
406 fi
407
408 if test "$enable_stack_for_recursion" = "no"; then
409 AC_DEFINE([NO_RECURSE], [], [
410 PCRE uses recursive function calls to handle backtracking while
411 matching. This can sometimes be a problem on systems that have
412 stacks of limited size. Define NO_RECURSE to get a version that
413 doesn't use recursion in the match() function; instead it creates
414 its own stack by steam using pcre_recurse_malloc() to obtain memory
415 from the heap. For more detail, see the comments and other stuff
416 just above the match() function. On systems that support it,
417 "configure" can be used to set this in the Makefile
418 (use --disable-stack-for-recursion).])
419 fi
420
421 if test "$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 "$enable_pcregrep_libbz2" = "yes"; then
428 AC_DEFINE([SUPPORT_LIBBZ2], [], [
429 Define to allow pcregrep to be linked with libbz2, so that it is
430 able to handle .bz2 files.])
431 fi
432
433 if test "$enable_pcretest_libreadline" = "yes"; then
434 AC_DEFINE([SUPPORT_LIBREADLINE], [], [
435 Define to allow pcretest to be linked with libreadline.])
436 fi
437
438 AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
439 The value of NEWLINE determines the newline character sequence. On
440 systems that support it, "configure" can be used to override the
441 default, which is 10. The possible values are 10 (LF), 13 (CR),
442 3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
443
444 if test "$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 AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
455 The value of LINK_SIZE determines the number of bytes used to store
456 links as offsets within the compiled regex. The default is 2, which
457 allows for compiled patterns up to 64K long. This covers the vast
458 majority of cases. However, PCRE can also be compiled to use 3 or 4
459 bytes instead. This allows for longer patterns in extreme cases. On
460 systems that support it, "configure" can be used to override this default.])
461
462 AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$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
473 AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
474 The value of MATCH_LIMIT determines the default number of times the
475 internal match() function can be called during a single execution of
476 pcre_exec(). There is a runtime interface for setting a different
477 limit. The limit exists in order to catch runaway regular
478 expressions that take for ever to determine that they do not match.
479 The default is set very large so that it does not accidentally catch
480 legitimate cases. On systems that support it, "configure" can be
481 used to override this default default.])
482
483 AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$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 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 that support it, "configure" can be used to override the default.])
494
495 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
500 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
505 AH_VERBATIM([PCRE_EXP_DEFN], [
506 /* 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 #undef PCRE_EXP_DEFN])
516
517 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 "configure", this can be done via --enable-ebcdic. PCRE will then
522 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 It is not possible to build a version of PCRE that supports both
525 EBCDIC and UTF-8.])
526 fi
527
528 # 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
540 # The extra LDFLAGS for each particular library
541 # (Note: The libpcre*_version bits are m4 variables, assigned above)
542
543 EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
544 $NO_UNDEFINED -version-info libpcre_version"
545
546 EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
547 $NO_UNDEFINED -version-info libpcreposix_version"
548
549 EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
550 $NO_UNDEFINED -version-info libpcrecpp_version \
551 $EXPORT_ALL_SYMBOLS"
552
553 AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
554 AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
555 AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
556
557 # When we run 'make distcheck', use these arguments.
558 DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
559 AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
560
561 # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
562 # specified, the relevant library is available.
563
564 if test "$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 LIBZ="-lz"
574 fi
575 AC_SUBST(LIBZ)
576
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 "$HAVE_LIBBZ2" != "1"; then
583 echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
584 exit 1
585 fi
586 LIBBZ2="-lbz2"
587 fi
588 AC_SUBST(LIBBZ2)
589
590 # Similarly for --enable-pcretest-readline
591
592 if test "$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 LIBREADLINE="-lreadline"
602 fi
603 AC_SUBST(LIBREADLINE)
604
605 # Produce these files, in addition to config.h.
606 AC_CONFIG_FILES(
607 Makefile
608 libpcre.pc
609 libpcreposix.pc
610 libpcrecpp.pc
611 pcre-config
612 pcre.h
613 pcre_stringpiece.h
614 pcrecpparg.h
615 )
616
617 # Make the generated script files executable.
618 AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
619
620 # Make sure that pcre_chartables.c is removed in case the method for
621 # creating it was changed by reconfiguration.
622 AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
623
624 AC_OUTPUT
625
626 # Print out a nice little message after configure is run displaying your
627 # chosen options.
628
629 cat <<EOF
630
631 $PACKAGE-$VERSION configuration summary:
632
633 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
645 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 Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
662
663 EOF
664
665 dnl end configure.ac

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