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