1 dnl Process this file with autoconf to produce a configure script. 2 3 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 8 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 m4_define(pcre_major, [8]) 12 m4_define(pcre_minor, [12]) 13 m4_define(pcre_prerelease, []) 14 m4_define(pcre_date, [2011-01-15]) 15 16 # 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 21 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 27 # This was added at the suggestion of libtoolize (03-Jan-10) 28 AC_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 40 remember_set_CFLAGS="$CFLAGS" 41 remember_set_CXXFLAGS="$CXXFLAGS" 42 43 AC_PROG_CC 44 AC_PROG_CXX 45 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 # 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 AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="") 72 AC_LANG_POP 73 74 # Check for a 64-bit integer type 75 AC_TYPE_INT64_T 76 77 AC_PROG_INSTALL 78 AC_LIBTOOL_WIN32_DLL 79 AC_PROG_LIBTOOL 80 AC_PROG_LN_S 81 82 PCRE_MAJOR="pcre_major" 83 PCRE_MINOR="pcre_minor" 84 PCRE_PRERELEASE="pcre_prerelease" 85 PCRE_DATE="pcre_date" 86 87 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 echo "*** Use only 01 to 07 or 10 onwards, to avoid octal issues. ***" 92 echo "***" 93 exit 1 94 fi 95 96 AC_SUBST(PCRE_MAJOR) 97 AC_SUBST(PCRE_MINOR) 98 AC_SUBST(PCRE_PRERELEASE) 99 AC_SUBST(PCRE_DATE) 100 101 # Set a more sensible default value for $(htmldir). 102 if test "x$htmldir" = 'x${docdir}' 103 then 104 htmldir='${docdir}/html' 105 fi 106 107 # Handle --disable-cpp. The substitution of enable_cpp is needed for use in 108 # pcre-config. 109 AC_ARG_ENABLE(cpp, 110 AS_HELP_STRING([--disable-cpp], 111 [disable C++ support]), 112 , enable_cpp=yes) 113 AC_SUBST(enable_cpp) 114 115 # 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 # Handle --enable-utf8 (disabled by default) 122 AC_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 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) 132 133 # Handle --enable-newline=NL 134 dnl AC_ARG_ENABLE(newline, 135 dnl AS_HELP_STRING([--enable-newline=NL], 136 dnl [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]), 137 dnl , enable_newline=lf) 138 139 # 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 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 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" 162 163 # 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 # Handle --enable-ebcdic 170 AC_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 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) 180 181 # 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 # Handle --enable-pcretest-libreadline 194 AC_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 200 AC_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 206 AC_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 212 AC_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 # 225 AC_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 # 233 if test "x$enable_unicode_properties" = "xyes" 234 then 235 if test "x$enable_utf8" = "xno" 236 then 237 AC_MSG_ERROR([support for Unicode properties requires UTF-8 support]) 238 fi 239 enable_utf8=yes 240 fi 241 242 if test "x$enable_utf8" = "xunset" 243 then 244 enable_utf8=no 245 fi 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 # 252 if test "x$enable_ebcdic" = "xyes" 253 then 254 enable_rebuild_chartables=yes 255 if test "x$enable_utf8" = "xyes" 256 then 257 AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time]) 258 fi 259 fi 260 261 # Convert the newline identifier into the appropriate integer value. 262 case "$enable_newline" in 263 lf) ac_pcre_newline_value=10 ;; 264 cr) ac_pcre_newline_value=13 ;; 265 crlf) ac_pcre_newline_value=3338 ;; 266 anycrlf) ac_pcre_newline_value=-2 ;; 267 any) ac_pcre_newline_value=-1 ;; 268 *) 269 AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option]) 270 ;; 271 esac 272 273 # Check argument to --with-link-size 274 case "$with_link_size" in 275 2|3|4) ;; 276 *) 277 AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option]) 278 ;; 279 esac 280 281 AH_TOP([ 282 /* On Unix-like systems config.h.in is converted by "configure" into config.h. 283 Some other environments also support the use of "configure". PCRE is written in 284 Standard C, but there are a few non-standard things it can cope with, allowing 285 it to run on SunOS4 and other "close to standard" systems. 286 287 If you are going to build PCRE "by hand" on a system without "configure" you 288 should copy the distributed config.h.generic to config.h, and then set up the 289 macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to 290 all of your compile commands, so that config.h is included at the start of 291 every source. 292 293 Alternatively, you can avoid editing by using -D on the compiler command line 294 to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H. 295 296 PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if 297 HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set 298 them both to 0; an emulation function will be used. */]) 299 300 # Checks for header files. 301 AC_HEADER_STDC 302 AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h) 303 304 # The files below are C++ header files. 305 pcre_have_type_traits="0" 306 pcre_have_bits_type_traits="0" 307 if test "x$enable_cpp" = "xyes" -a -n "$CXX" 308 then 309 AC_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). 316 OLD_LDFLAGS="$LDFLAGS" 317 for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \ 318 "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do 319 AC_MSG_CHECKING([for alias support in the linker]) 320 LDFLAGS="$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,$flag"; 330 break;], 331 AC_MSG_RESULT([no])) 332 done 333 LDFLAGS="$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. 338 AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"], 339 [pcre_have_cpp_headers="0"]) 340 AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"], 341 [pcre_have_bits_type_traits="0"]) 342 AC_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. 352 AH_TEMPLATE(HAVE_STRTOQ, [Define to 1 if you have `strtoq'.]) 353 AH_TEMPLATE(HAVE_STRTOLL, [Define to 1 if you have `strtoll'.]) 354 AH_TEMPLATE(HAVE__STRTOI64, [Define to 1 if you have `_strtoi64'.]) 355 AH_TEMPLATE(HAVE_STRTOIMAX, [Define to 1 if you have `strtoimax'.]) 356 have_strto_fn=0 357 for 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)]) 372 done 373 374 if test "$have_strto_fn" = 1; then 375 AC_CHECK_TYPES([long long], 376 [pcre_have_long_long="1"], 377 [pcre_have_long_long="0"]) 378 AC_CHECK_TYPES([unsigned long long], 379 [pcre_have_ulong_long="1"], 380 [pcre_have_ulong_long="0"]) 381 else 382 pcre_have_long_long="0" 383 pcre_have_ulong_long="0" 384 fi 385 AC_SUBST(pcre_have_long_long) 386 AC_SUBST(pcre_have_ulong_long) 387 388 AC_LANG_POP 389 fi 390 # Using AC_SUBST eliminates the need to include config.h in a public .h file 391 AC_SUBST(pcre_have_type_traits) 392 AC_SUBST(pcre_have_bits_type_traits) 393 394 # Conditional compilation 395 AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes") 396 AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes") 397 398 # Checks for typedefs, structures, and compiler characteristics. 399 400 AC_C_CONST 401 AC_TYPE_SIZE_T 402 403 # Checks for library functions. 404 405 AC_CHECK_FUNCS(bcopy memmove strerror) 406 407 # Check for the availability of libz (aka zlib) 408 409 AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1]) 410 AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1]) 411 412 # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB, 413 # as for libz. However, this had the following problem, diagnosed and fixed by 414 # a user: 415 # 416 # - libbz2 uses the Pascal calling convention (WINAPI) for the functions 417 # under Win32. 418 # - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h", 419 # therefore missing the function definition. 420 # - The compiler thus generates a "C" signature for the test function. 421 # - The linker fails to find the "C" function. 422 # - PCRE fails to configure if asked to do so against libbz2. 423 # 424 # Solution: 425 # 426 # - Replace the AC_CHECK_LIB test with a custom test. 427 428 AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1]) 429 # Original test 430 # AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1]) 431 # 432 # Custom test follows 433 434 AC_MSG_CHECKING([for libbz2]) 435 OLD_LIBS="$LIBS" 436 LIBS="$LIBS -lbz2" 437 AC_LINK_IFELSE( AC_LANG_PROGRAM([[ 438 #ifdef HAVE_BZLIB_H 439 #include <bzlib.h> 440 #endif]], 441 [[return (int)BZ2_bzopen("conftest", "rb");]]), 442 [AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;], 443 AC_MSG_RESULT([no])) 444 LIBS="$OLD_LIBS" 445 446 # Check for the availabiity of libreadline 447 448 AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1]) 449 AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1]) 450 AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1]) 451 452 # This facilitates -ansi builds under Linux 453 dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc]) 454 455 PCRE_STATIC_CFLAG="" 456 if test "x$enable_shared" = "xno" ; then 457 AC_DEFINE([PCRE_STATIC], [1], [ 458 Define if linking statically (TODO: make nice with Libtool)]) 459 PCRE_STATIC_CFLAG="-DPCRE_STATIC" 460 fi 461 AC_SUBST(PCRE_STATIC_CFLAG) 462 463 # Here is where pcre specific defines are handled 464 465 if test "$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.]) 471 fi 472 473 if test "$enable_unicode_properties" = "yes"; then 474 AC_DEFINE([SUPPORT_UCP], [], [ 475 Define to enable support for Unicode properties]) 476 fi 477 478 if test "$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).]) 489 fi 490 491 if test "$enable_pcregrep_libz" = "yes"; then 492 AC_DEFINE([SUPPORT_LIBZ], [], [ 493 Define to allow pcregrep to be linked with libz, so that it is 494 able to handle .gz files.]) 495 fi 496 497 if test "$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.]) 501 fi 502 503 if test "$enable_pcretest_libreadline" = "yes"; then 504 AC_DEFINE([SUPPORT_LIBREADLINE], [], [ 505 Define to allow pcretest to be linked with libreadline.]) 506 fi 507 508 AC_DEFINE_UNQUOTED([NEWLINE], [$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).]) 513 514 if test "$enable_bsr_anycrlf" = "yes"; then 515 AC_DEFINE([BSR_ANYCRLF], [], [ 516 By default, the \R escape sequence matches any Unicode line ending 517 character or sequence of characters. If BSR_ANYCRLF is defined, this is 518 changed so that backslash-R matches only CR, LF, or CRLF. The build- 519 time default can be overridden by the user of PCRE at runtime. On 520 systems that support it, "configure" can be used to override the 521 default.]) 522 fi 523 524 AC_DEFINE_UNQUOTED([LINK_SIZE], [$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.]) 531 532 AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [ 533 When calling PCRE via the POSIX interface, additional working storage 534 is required for holding the pointers to capturing substrings because 535 PCRE requires three integers per substring, whereas the POSIX 536 interface provides only two. If the number of expected substrings is 537 small, the wrapper function uses space on the stack, because this is 538 faster than using malloc() for each call. The threshold above which 539 the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On 540 systems that support it, "configure" can be used to override this 541 default.]) 542 543 AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$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.]) 552 553 AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [ 554 The above limit applies to all calls of match(), whether or not they 555 increase the recursion depth. In some environments it is desirable 556 to limit the depth of recursive calls of match() more strictly, in 557 order to restrict the maximum amount of stack (or heap, if 558 NO_RECURSE is defined) that is used. The value of 559 MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To 560 have any useful effect, it must be less than the value of 561 MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT. 562 There is a runtime method for setting a different limit. On systems 563 that support it, "configure" can be used to override the default.]) 564 565 AC_DEFINE([MAX_NAME_SIZE], [32], [ 566 This limit is parameterized just in case anybody ever wants to 567 change it. Care must be taken if it is increased, because it guards 568 against integer overflow caused by enormously large patterns.]) 569 570 AC_DEFINE([MAX_NAME_COUNT], [10000], [ 571 This limit is parameterized just in case anybody ever wants to 572 change it. Care must be taken if it is increased, because it guards 573 against integer overflow caused by enormously large patterns.]) 574 575 AH_VERBATIM([PCRE_EXP_DEFN], [ 576 /* If you are compiling for a system other than a Unix-like system or 577 Win32, and it needs some magic to be inserted before the definition 578 of a function that is exported by the library, define this macro to 579 contain the relevant magic. If you do not define this macro, it 580 defaults to "extern" for a C compiler and "extern C" for a C++ 581 compiler on non-Win32 systems. This macro apears at the start of 582 every exported function that is part of the external API. It does 583 not appear on functions that are "external" in the C sense, but 584 which are internal to the library. */ 585 #undef PCRE_EXP_DEFN]) 586 587 if test "$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.]) 596 fi 597 598 # Platform specific issues 599 NO_UNDEFINED= 600 EXPORT_ALL_SYMBOLS= 601 case $host_os in 602 cygwin* | mingw* ) 603 if test X"$enable_shared" = Xyes; then 604 NO_UNDEFINED="-no-undefined" 605 EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols" 606 fi 607 ;; 608 esac 609 610 # The extra LDFLAGS for each particular library 611 # (Note: The libpcre*_version bits are m4 variables, assigned above) 612 613 EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \ 614 $NO_UNDEFINED -version-info libpcre_version" 615 616 EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \ 617 $NO_UNDEFINED -version-info libpcreposix_version" 618 619 EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \ 620 $NO_UNDEFINED -version-info libpcrecpp_version \ 621 $EXPORT_ALL_SYMBOLS" 622 623 AC_SUBST(EXTRA_LIBPCRE_LDFLAGS) 624 AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS) 625 AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS) 626 627 # When we run 'make distcheck', use these arguments. 628 DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties" 629 AC_SUBST(DISTCHECK_CONFIGURE_FLAGS) 630 631 # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is 632 # specified, the relevant library is available. 633 634 if test "$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" 644 fi 645 AC_SUBST(LIBZ) 646 647 if 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 "$HAVE_LIBBZ2" != "1"; then 653 echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found" 654 exit 1 655 fi 656 LIBBZ2="-lbz2" 657 fi 658 AC_SUBST(LIBBZ2) 659 660 # Similarly for --enable-pcretest-readline 661 662 if test "$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" 672 fi 673 AC_SUBST(LIBREADLINE) 674 675 # Produce these files, in addition to config.h. 676 AC_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. 688 AC_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. 692 AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c]) 693 694 AC_OUTPUT 695 696 # Print out a nice little message after configure is run displaying your 697 # chosen options. 698 699 cat <<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} 732 733 EOF 734 735 dnl end configure.ac 736
