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revision 89 by nigel, Sat Feb 24 21:41:27 2007 UTC revision 592 by ph10, Sat Apr 30 17:37:37 2011 UTC
# Line 1  Line 1 
1  dnl Process this file with autoconf to produce a configure script.  dnl Process this file with autoconf to produce a configure script.
2    
3  dnl This configure.in file has been hacked around quite a lot as a result of  dnl NOTE FOR MAINTAINERS: Do not use minor version numbers 08 or 09 because
4  dnl patches that various people have sent to me (PH). Sometimes the information  dnl the leading zeros may cause them to be treated as invalid octal constants
5  dnl I get is contradictory. I've tried to put in comments that explain things,  dnl if a PCRE user writes code that uses PCRE_MINOR as a number. There is now
6  dnl but in some cases the information is second-hand and I have no way of  dnl a check further down that throws an error if 08 or 09 are used.
7  dnl verifying it. I am not an autoconf or libtool expert!  
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, [13])
13    m4_define(pcre_prerelease, [-RC1])
14    m4_define(pcre_date, [2011-04-30])
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  dnl This is required at the start; the name is the name of a file  AC_PREREQ(2.57)
22  dnl it should be seeing, to verify it is in the same directory.  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  AC_INIT(dftables.c)  remember_set_CFLAGS="$CFLAGS"
41  AC_CONFIG_SRCDIR([pcre.h])  remember_set_CXXFLAGS="$CXXFLAGS"
42    
43  dnl A safety precaution  AC_PROG_CC
44    AC_PROG_CXX
45    
46  AC_PREREQ(2.57)  if test "x$remember_set_CFLAGS" = "x"
47    then
48      if test "$CFLAGS" = "-g -O2"
49      then
50        CFLAGS="-O2"
51      elif test "$CFLAGS" = "-g"
52      then
53        CFLAGS=""
54      fi
55    fi
56    
57  dnl Arrange to build config.h from config.h.in.  if test "x$remember_set_CXXFLAGS" = "x"
58  dnl Manual says this macro should come right after AC_INIT.  then
59  AC_CONFIG_HEADER(config.h)    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  dnl Default values for miscellaneous macros  # 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  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  # Check for a 64-bit integer type
75    AC_TYPE_INT64_T
76    
77  dnl Provide versioning information for libtool shared libraries that  AC_PROG_INSTALL
78  dnl are built by default on Unix systems.  AC_LIBTOOL_WIN32_DLL
79    AC_PROG_LIBTOOL
80    AC_PROG_LN_S
81    
82  PCRE_LIB_VERSION=0:1:0  PCRE_MAJOR="pcre_major"
83  PCRE_POSIXLIB_VERSION=0:0:0  PCRE_MINOR="pcre_minor"
84  PCRE_CPPLIB_VERSION=0:0:0  PCRE_PRERELEASE="pcre_prerelease"
85    PCRE_DATE="pcre_date"
86    
87  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  if test "$PCRE_MINOR" = "08" -o "$PCRE_MINOR" = "09"
88  dnl substituted in pcre-config.in.  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  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  AC_SUBST(PCRE_MAJOR)
97  PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  AC_SUBST(PCRE_MINOR)
98  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`  AC_SUBST(PCRE_PRERELEASE)
99  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}  AC_SUBST(PCRE_DATE)
100    
101  dnl Handle --disable-cpp  # 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,  AC_ARG_ENABLE(cpp,
110  [  --disable-cpp           disable C++ support],                AS_HELP_STRING([--disable-cpp],
111  want_cpp="$enableval", want_cpp=yes)                               [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  dnl Checks for programs.  # 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  AC_PROG_CC  # 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  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Separate newline options
140  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  ac_pcre_newline=lf
141  dnl though that is completely bogus. (This may happen only on certain systems  AC_ARG_ENABLE(newline-is-cr,
142  dnl with certain versions of autoconf, of course.) An attempt to include this                AS_HELP_STRING([--enable-newline-is-cr],
143  dnl test inside a check for want_cpp was criticized by a libtool expert, who                               [use CR as newline character]),
144  dnl tells me that it isn't allowed.                ac_pcre_newline=cr)
145    AC_ARG_ENABLE(newline-is-lf,
146                  AS_HELP_STRING([--enable-newline-is-lf],
147                                 [use LF as newline character (default)]),
148                  ac_pcre_newline=lf)
149    AC_ARG_ENABLE(newline-is-crlf,
150                  AS_HELP_STRING([--enable-newline-is-crlf],
151                                 [use CRLF as newline sequence]),
152                  ac_pcre_newline=crlf)
153    AC_ARG_ENABLE(newline-is-anycrlf,
154                  AS_HELP_STRING([--enable-newline-is-anycrlf],
155                                 [use CR, LF, or CRLF as newline sequence]),
156                  ac_pcre_newline=anycrlf)
157    AC_ARG_ENABLE(newline-is-any,
158                  AS_HELP_STRING([--enable-newline-is-any],
159                                 [use any valid Unicode newline sequence]),
160                  ac_pcre_newline=any)
161    enable_newline="$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  AC_PROG_CXX  # 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  dnl The icc compiler has the same options as gcc, so let the rest of the  # Handle --disable-stack-for-recursion
176  dnl configure script think it has gcc when setting up dnl options etc.  AC_ARG_ENABLE(stack-for-recursion,
177  dnl This is a nasty hack which no longer seems necessary with the update                AS_HELP_STRING([--disable-stack-for-recursion],
178  dnl to the latest libtool files, so I have commented it out.                               [don't use stack recursion when matching]),
179  dnl                , enable_stack_for_recursion=yes)
180  dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
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  AC_PROG_INSTALL  # Handle --with-posix-malloc-threshold=NBYTES
200  AC_LIBTOOL_WIN32_DLL  AC_ARG_WITH(posix-malloc-threshold,
201  AC_PROG_LIBTOOL              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  dnl We need to find a compiler for compiling a program to run on the local host  # Handle --with-match-limit=N
212  dnl while building. It needs to be different from CC when cross-compiling.  AC_ARG_WITH(match-limit,
213  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for              AS_HELP_STRING([--with-match-limit=N],
214  dnl figuring this out automatically. Unfortunately, it does not work with the                             [default limit on internal looping (default=10000000)]),
215  dnl latest versions of autoconf. So for the moment, we just default to the              , with_match_limit=10000000)
216  dnl same values as the "main" compiler. People who are cross-compiling will  
217  dnl just have to adjust the Makefile by hand or set these values when they  # Handle --with-match-limit_recursion=N
218  dnl run "configure".  #
219    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
220  CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}  # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
221  CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}  # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
222  CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}  # different numeric value (or even the same numeric value as MATCH_LIMIT,
223  CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'}  # though no longer defined in terms of the latter).
224  CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'}  #
225  BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}  AC_ARG_WITH(match-limit-recursion,
226  BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}              AS_HELP_STRING([--with-match-limit-recursion=N],
227                               [default limit on internal recursion (default=MATCH_LIMIT)]),
228                , with_match_limit_recursion=MATCH_LIMIT)
229    
230    # Make sure that if enable_unicode_properties was set, that UTF-8 support
231    # is enabled.
232    #
233    if test "x$enable_unicode_properties" = "xyes"
234    then
235      if test "x$enable_utf8" = "xno"
236      then
237        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
238      fi
239      enable_utf8=yes
240    fi
241    
242  dnl Checks for header files.  if test "x$enable_utf8" = "xunset"
243    then
244      enable_utf8=no
245    fi
246    
247  AC_HEADER_STDC  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
248  AC_CHECK_HEADERS(limits.h)  # 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  dnl The files below are C++ header files. One person told me (PH) that  # Checks for header files.
301  dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  AC_HEADER_STDC
302  dnl doesn't work. However, this doesn't always seem to be the case.  AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
303    
304  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # 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  then
309  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
310    
311  dnl We could be more clever here, given we're doing AC_SUBST with this  # Older versions of pcre defined pcrecpp::no_arg, but in new versions
312  dnl (eg set a var to be the name of the include file we want).  But we're not  # it's called pcrecpp::RE::no_arg.  For backwards ABI compatibility,
313  dnl so it's easy to change back to 'regular' autoconf vars if we needed to.  # 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"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
339                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
340  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
341                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
342  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
343                                  [pcre_have_type_traits="0"])                                  [pcre_have_type_traits="0"])
 dnl Using AC_SUBST eliminates the need to include config.h in a public .h file  
 AC_SUBST(pcre_have_bits_type_traits)  
 AC_SUBST(pcre_have_type_traits)  
 AC_LANG_RESTORE  
 fi  
344    
345  dnl From the above, we now have enough info to know if C++ is fully installed  # (This isn't c++-specific, but is only used in pcrecpp.cc, so try this
346  if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then  # in a c++ context.  This matters becuase strtoimax is C99 and may not
347    MAYBE_CPP_TARGETS='$(CPP_TARGETS)'  # be supported by the C++ compiler.)
348    HAVE_CPP=  # 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 "$have_strto_fn" = 1; then
375      AC_CHECK_TYPES([long long],
376                     [pcre_have_long_long="1"],
377                     [pcre_have_long_long="0"])
378      AC_CHECK_TYPES([unsigned long long],
379                     [pcre_have_ulong_long="1"],
380                     [pcre_have_ulong_long="0"])
381  else  else
382    MAYBE_CPP_TARGETS=    pcre_have_long_long="0"
383    HAVE_CPP="#"    pcre_have_ulong_long="0"
384  fi  fi
385  AC_SUBST(MAYBE_CPP_TARGETS)  AC_SUBST(pcre_have_long_long)
386  AC_SUBST(HAVE_CPP)  AC_SUBST(pcre_have_ulong_long)
387    
388  dnl Checks for typedefs, structures, and compiler characteristics.  AC_LANG_POP
389    fi
390    # Using AC_SUBST eliminates the need to include config.h in a public .h file
391    AC_SUBST(pcre_have_type_traits)
392    AC_SUBST(pcre_have_bits_type_traits)
393    
394    # Conditional compilation
395    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
396    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
397    
398    # Checks for typedefs, structures, and compiler characteristics.
399    
400  AC_C_CONST  AC_C_CONST
401  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
402    
403  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  # Checks for library functions.
 AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])  
 AC_SUBST(pcre_have_long_long)  
 AC_SUBST(pcre_have_ulong_long)  
404    
405  dnl Checks for library functions.  AC_CHECK_FUNCS(bcopy memmove strerror)
406    
407  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  # Check for the availability of libz (aka zlib)
408    
409  dnl Handle --enable-utf8  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
410    AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
411    
412  AC_ARG_ENABLE(utf8,  # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
413  [  --enable-utf8           enable UTF8 support],  # as for libz. However, this had the following problem, diagnosed and fixed by
414  if test "$enableval" = "yes"; then  # a user:
415    UTF8=-DSUPPORT_UTF8  #
416  fi  #   - 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="$OLD_LIBS"
445    
446    # Check for the availabiity of libreadline
447    
448    AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
449    AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
450    AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
451    
452  dnl Handle --enable-unicode-properties  # This facilitates -ansi builds under Linux
453    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
454    
455  AC_ARG_ENABLE(unicode-properties,  PCRE_STATIC_CFLAG=""
456  [  --enable-unicode-properties  enable Unicode properties support],  if test "x$enable_shared" = "xno" ; then
457  if test "$enableval" = "yes"; then    AC_DEFINE([PCRE_STATIC], [1], [
458    UCP=-DSUPPORT_UCP      Define if linking statically (TODO: make nice with Libtool)])
459      PCRE_STATIC_CFLAG="-DPCRE_STATIC"
460  fi  fi
461  )  AC_SUBST(PCRE_STATIC_CFLAG)
462    
463  dnl Handle --enable-newline-is-cr  # Here is where pcre specific defines are handled
464    
465  AC_ARG_ENABLE(newline-is-cr,  if test "$enable_utf8" = "yes"; then
466  [  --enable-newline-is-cr  use CR as the newline character],    AC_DEFINE([SUPPORT_UTF8], [], [
467  if test "$enableval" = "yes"; then      Define to enable support for the UTF-8 Unicode encoding. This will
468    NEWLINE=-DNEWLINE=13      work even in an EBCDIC environment, but it is incompatible with
469        the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
470        *or* ASCII/UTF-8, but not both at once.])
471  fi  fi
 )  
472    
473  dnl Handle --enable-newline-is-lf  if test "$enable_unicode_properties" = "yes"; then
474      AC_DEFINE([SUPPORT_UCP], [], [
475  AC_ARG_ENABLE(newline-is-lf,      Define to enable support for Unicode properties])
 [  --enable-newline-is-lf  use LF as the newline character],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=10  
476  fi  fi
 )  
477    
478  dnl Handle --enable-ebcdic  if test "$enable_stack_for_recursion" = "no"; then
479      AC_DEFINE([NO_RECURSE], [], [
480  AC_ARG_ENABLE(ebcdic,      PCRE uses recursive function calls to handle backtracking while
481  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],      matching. This can sometimes be a problem on systems that have
482  if test "$enableval" == "yes"; then      stacks of limited size. Define NO_RECURSE to get a version that
483    EBCDIC=-DEBCDIC=1      doesn't use recursion in the match() function; instead it creates
484        its own stack by steam using pcre_recurse_malloc() to obtain memory
485        from the heap. For more detail, see the comments and other stuff
486        just above the match() function. On systems that support it,
487        "configure" can be used to set this in the Makefile
488        (use --disable-stack-for-recursion).])
489  fi  fi
 )  
490    
491  dnl Handle --disable-stack-for-recursion  if test "$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  AC_ARG_ENABLE(stack-for-recursion,  if test "$enable_pcregrep_libbz2" = "yes"; then
498  [  --disable-stack-for-recursion  disable use of stack recursion when matching],    AC_DEFINE([SUPPORT_LIBBZ2], [], [
499  if test "$enableval" = "no"; then      Define to allow pcregrep to be linked with libbz2, so that it is
500    NO_RECURSE=-DNO_RECURSE      able to handle .bz2 files.])
501  fi  fi
 )  
502    
503  dnl There doesn't seem to be a straightforward way of having parameters  if test "$enable_pcretest_libreadline" = "yes"; then
504  dnl that set values, other than fudging the --with thing. So that's what    AC_DEFINE([SUPPORT_LIBREADLINE], [], [
505  dnl I've done.      Define to allow pcretest to be linked with libreadline.])
506    fi
507    
508  dnl Handle --with-posix-malloc-threshold=n  AC_DEFINE_UNQUOTED([NEWLINE], [$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 "$enable_bsr_anycrlf" = "yes"; then
515      AC_DEFINE([BSR_ANYCRLF], [], [
516        By default, the \R escape sequence matches any Unicode line ending
517        character or sequence of characters. If BSR_ANYCRLF is defined, this is
518        changed so that backslash-R matches only CR, LF, or CRLF. The build-
519        time default can be overridden by the user of PCRE at runtime. On
520        systems that support it, "configure" can be used to override the
521        default.])
522    fi
523    
524  AC_ARG_WITH(posix-malloc-threshold,  AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
525  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],    The value of LINK_SIZE determines the number of bytes used to store
526    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval    links as offsets within the compiled regex. The default is 2, which
527  )    allows for compiled patterns up to 64K long. This covers the vast
528      majority of cases. However, PCRE can also be compiled to use 3 or 4
529      bytes instead. This allows for longer patterns in extreme cases. On
530      systems that support it, "configure" can be used to override this default.])
531    
532    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$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  dnl Handle --with-link-size=n  # 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  AC_ARG_WITH(link-size,  # The extra LDFLAGS for each particular library
611  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  # (Note: The libpcre*_version bits are m4 variables, assigned above)
   LINK_SIZE=-DLINK_SIZE=$withval  
 )  
612    
613  dnl Handle --with-match-limit=n  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
614                           $NO_UNDEFINED -version-info libpcre_version"
615    
616  AC_ARG_WITH(match-limit,  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
617  [  --with-match-limit=10000000  default limit on internal looping],                              $NO_UNDEFINED -version-info libpcreposix_version"
   MATCH_LIMIT=-DMATCH_LIMIT=$withval  
 )  
618    
619  dnl Handle --with-match-limit_recursion=n  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  AC_ARG_WITH(match-limit-recursion,  if test "$enable_pcregrep_libbz2" = "yes"; then
648  [  --with-match-limit-recursion=10000000  default limit on internal recursion],    if test "$HAVE_BZLIB_H" != "1"; then
649    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval      echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
650  )      exit 1
651      fi
652      if test "$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  dnl Unicode character property support implies UTF-8 support  # Similarly for --enable-pcretest-readline
661    
662  if test "$UCP" != "" ; then  if test "$enable_pcretest_libreadline" = "yes"; then
663    UTF8=-DSUPPORT_UTF8    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  fi
673    AC_SUBST(LIBREADLINE)
674    
675  dnl "Export" these variables  # Produce these files, in addition to config.h.
676    AC_CONFIG_FILES(
677  AC_SUBST(BUILD_EXEEXT)          Makefile
678  AC_SUBST(BUILD_OBJEXT)          libpcre.pc
679  AC_SUBST(CC_FOR_BUILD)          libpcreposix.pc
680  AC_SUBST(CXX_FOR_BUILD)          libpcrecpp.pc
681  AC_SUBST(CFLAGS_FOR_BUILD)          pcre-config
682  AC_SUBST(CXXFLAGS_FOR_BUILD)          pcre.h
683  AC_SUBST(CXXLDFLAGS)          pcre_stringpiece.h
684  AC_SUBST(EBCDIC)          pcrecpparg.h
685  AC_SUBST(HAVE_MEMMOVE)  )
 AC_SUBST(HAVE_STRERROR)  
 AC_SUBST(LINK_SIZE)  
 AC_SUBST(MATCH_LIMIT)  
 AC_SUBST(MATCH_LIMIT_RECURSION)  
 AC_SUBST(NEWLINE)  
 AC_SUBST(NO_RECURSE)  
 AC_SUBST(PCRE_LIB_VERSION)  
 AC_SUBST(PCRE_POSIXLIB_VERSION)  
 AC_SUBST(PCRE_CPPLIB_VERSION)  
 AC_SUBST(PCRE_VERSION)  
 AC_SUBST(POSIX_MALLOC_THRESHOLD)  
 AC_SUBST(UCP)  
 AC_SUBST(UTF8)  
686    
687  dnl Stuff to make MinGW work better. Special treatment is no longer  # Make the generated script files executable.
688  dnl needed for Cygwin.  AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
689    
690  case $host_os in  # Make sure that pcre_chartables.c is removed in case the method for
691  mingw* )  # creating it was changed by reconfiguration.
692      POSIX_OBJ=pcreposix.o  AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
693      POSIX_LOBJ=pcreposix.lo  
694      POSIX_LIB=  AC_OUTPUT
695      ON_WINDOWS=  
696      NOT_ON_WINDOWS="#"  # Print out a nice little message after configure is run displaying your
697      WIN_PREFIX=  # chosen options.
698      ;;  
699  * )  cat <<EOF
700      ON_WINDOWS="#"  
701      NOT_ON_WINDOWS=  $PACKAGE-$VERSION configuration summary:
702      POSIX_OBJ=  
703      POSIX_LOBJ=      Install prefix .................. : ${prefix}
704      POSIX_LIB=libpcreposix.la      C preprocessor .................. : ${CPP}
705      WIN_PREFIX=      C compiler ...................... : ${CC}
706      ;;      C++ preprocessor ................ : ${CXXCPP}
707  esac      C++ compiler .................... : ${CXX}
708  AC_SUBST(WIN_PREFIX)      Linker .......................... : ${LD}
709  AC_SUBST(ON_WINDOWS)      C preprocessor flags ............ : ${CPPFLAGS}
710  AC_SUBST(NOT_ON_WINDOWS)      C compiler flags ................ : ${CFLAGS}
711  AC_SUBST(POSIX_OBJ)      C++ compiler flags .............. : ${CXXFLAGS}
712  AC_SUBST(POSIX_LOBJ)      Linker flags .................... : ${LDFLAGS}
713  AC_SUBST(POSIX_LIB)      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 .. : ${enable_pcretest_libreadline}
732    
733  if test "x$enable_shared" = "xno" ; then  EOF
     AC_DEFINE([PCRE_STATIC],[1],[to link statically])  
 fi  
734    
735  dnl This must be last; it determines what files are written as well as config.h  dnl end configure.ac
 AC_OUTPUT(Makefile pcre-config:pcre-config.in libpcre.pc:libpcre.pc.in pcrecpparg.h:pcrecpparg.h.in pcre_stringpiece.h:pcre_stringpiece.h.in RunGrepTest:RunGrepTest.in RunTest:RunTest.in,[chmod a+x RunTest RunGrepTest pcre-config])  

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