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revision 87 by nigel, Sat Feb 24 21:41:21 2007 UTC revision 415 by ph10, Sat Apr 11 14:22:17 2009 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 major or minor version numbers with
4  dnl patches that various people have sent to me (PH). Sometimes the information  dnl leading zeros, because they may be treated as octal constants. The
5  dnl I get is contradictory. I've tried to put in comments that explain things,  dnl PCRE_PRERELEASE feature is for identifying release candidates. It might
6  dnl but in some cases the information is second-hand and I have no way of  dnl be defined as -RC2, for example. For real releases, it should be defined
7  dnl verifying it. I am not an autoconf or libtool expert!  dnl empty.
8    
9    m4_define(pcre_major, [7])
10    m4_define(pcre_minor, [9])
11    m4_define(pcre_prerelease, [])
12    m4_define(pcre_date, [2009-04-11])
13    
14    # Libtool shared library interface versions (current:revision:age)
15    m4_define(libpcre_version, [0:1:0])
16    m4_define(libpcreposix_version, [0:0:0])
17    m4_define(libpcrecpp_version, [0:0:0])
18    
19  dnl This is required at the start; the name is the name of a file  AC_PREREQ(2.57)
20  dnl it should be seeing, to verify it is in the same directory.  AC_INIT(PCRE, pcre_major.pcre_minor[]pcre_prerelease, , pcre)
21    AC_CONFIG_SRCDIR([pcre.h.in])
22    AM_INIT_AUTOMAKE([dist-bzip2 dist-zip])
23    AC_CONFIG_HEADERS(config.h)
24    
25    # The default CFLAGS and CXXFLAGS in Autoconf are "-g -O2" for gcc and just
26    # "-g" for any other compiler. There doesn't seem to be a standard way of
27    # getting rid of the -g (which I don't think is needed for a production
28    # library). This fudge seems to achieve the necessary. First, we remember the
29    # externally set values of CFLAGS and CXXFLAGS. Then call the AC_PROG_CC and
30    # AC_PROG_CXX macros to find the compilers - if CFLAGS and CXXFLAGS are not
31    # set, they will be set to Autoconf's defaults. Afterwards, if the original
32    # values were not set, remove the -g from the Autoconf defaults.
33    # (PH 02-May-07)
34    
35  AC_INIT(dftables.c)  remember_set_CFLAGS="$CFLAGS"
36    remember_set_CXXFLAGS="$CXXFLAGS"
37    
38  dnl A safety precaution  AC_PROG_CC
39    AC_PROG_CXX
40    
41  AC_PREREQ(2.57)  if test "x$remember_set_CFLAGS" = "x"
42    then
43      if test "$CFLAGS" = "-g -O2"
44      then
45        CFLAGS="-O2"
46      elif test "$CFLAGS" = "-g"
47      then
48        CFLAGS=""
49      fi
50    fi
51    
52  dnl Arrange to build config.h from config.h.in.  if test "x$remember_set_CXXFLAGS" = "x"
53  dnl Manual says this macro should come right after AC_INIT.  then
54  AC_CONFIG_HEADER(config.h)    if test "$CXXFLAGS" = "-g -O2"
55      then
56        CXXFLAGS="-O2"
57      elif test "$CXXFLAGS" = "-g"
58      then
59        CXXFLAGS=""
60      fi
61    fi
62    
63  dnl Default values for miscellaneous macros  # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
64    # Check for that case, and just disable c++ code if g++ doesn't run.
65    AC_LANG_PUSH(C++)
66    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
67    AC_LANG_POP
68    
69  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  AC_PROG_INSTALL
70    AC_LIBTOOL_WIN32_DLL
71    AC_PROG_LIBTOOL
72    AC_PROG_LN_S
73    
74  dnl Provide versioning information for libtool shared libraries that  PCRE_MAJOR="pcre_major"
75  dnl are built by default on Unix systems.  PCRE_MINOR="pcre_minor"
76    PCRE_PRERELEASE="pcre_prerelease"
77    PCRE_DATE="pcre_date"
78    
79    AC_SUBST(PCRE_MAJOR)
80    AC_SUBST(PCRE_MINOR)
81    AC_SUBST(PCRE_PRERELEASE)
82    AC_SUBST(PCRE_DATE)
83    
84  PCRE_LIB_VERSION=0:1:0  # Set a more sensible default value for $(htmldir).
85  PCRE_POSIXLIB_VERSION=0:0:0  if test "x$htmldir" = 'x${docdir}'
86  PCRE_CPPLIB_VERSION=0:0:0  then
87      htmldir='${docdir}/html'
88    fi
89    
90  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  # Handle --disable-cpp
91  dnl substituted in pcre-config.in.  AC_ARG_ENABLE(cpp,
92                  AS_HELP_STRING([--disable-cpp],
93                                 [disable C++ support]),
94                  , enable_cpp=yes)
95    
96    # Handle --enable-rebuild-chartables
97    AC_ARG_ENABLE(rebuild-chartables,
98                  AS_HELP_STRING([--enable-rebuild-chartables],
99                                 [rebuild character tables in current locale]),
100                  , enable_rebuild_chartables=no)
101    
102  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ./pcre.h | cut -c 29-`  # Handle --enable-utf8 (disabled by default)
103  PCRE_MINOR=`grep '#define PCRE_MINOR' ./pcre.h | cut -c 29-`  AC_ARG_ENABLE(utf8,
104  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ./pcre.h | cut -c 29-`                AS_HELP_STRING([--enable-utf8],
105  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}                               [enable UTF-8 support (incompatible with --enable-ebcdic)]),
106                  , enable_utf8=unset)
107    
108  dnl Handle --disable-cpp  # Handle --enable-unicode-properties
109    AC_ARG_ENABLE(unicode-properties,
110                  AS_HELP_STRING([--enable-unicode-properties],
111                                 [enable Unicode properties support (implies --enable-utf8)]),
112                  , enable_unicode_properties=no)
113    
114    # Handle --enable-newline=NL
115    dnl AC_ARG_ENABLE(newline,
116    dnl               AS_HELP_STRING([--enable-newline=NL],
117    dnl                              [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
118    dnl               , enable_newline=lf)
119    
120  AC_ARG_ENABLE(cpp,  # Separate newline options
121  [  --disable-cpp           disable C++ support],  ac_pcre_newline=lf
122  want_cpp="$enableval", want_cpp=yes)  AC_ARG_ENABLE(newline-is-cr,
123                  AS_HELP_STRING([--enable-newline-is-cr],
124                                 [use CR as newline character]),
125                  ac_pcre_newline=cr)
126    AC_ARG_ENABLE(newline-is-lf,
127                  AS_HELP_STRING([--enable-newline-is-lf],
128                                 [use LF as newline character (default)]),
129                  ac_pcre_newline=lf)
130    AC_ARG_ENABLE(newline-is-crlf,
131                  AS_HELP_STRING([--enable-newline-is-crlf],
132                                 [use CRLF as newline sequence]),
133                  ac_pcre_newline=crlf)
134    AC_ARG_ENABLE(newline-is-anycrlf,
135                  AS_HELP_STRING([--enable-newline-is-anycrlf],
136                                 [use CR, LF, or CRLF as newline sequence]),
137                  ac_pcre_newline=anycrlf)
138    AC_ARG_ENABLE(newline-is-any,
139                  AS_HELP_STRING([--enable-newline-is-any],
140                                 [use any valid Unicode newline sequence]),
141                  ac_pcre_newline=any)
142    enable_newline="$ac_pcre_newline"
143    
144    # Handle --enable-bsr-anycrlf
145    AC_ARG_ENABLE(bsr-anycrlf,
146                  AS_HELP_STRING([--enable-bsr-anycrlf],
147                                 [\R matches only CR, LF, CRLF by default]),
148                  , enable_bsr_anycrlf=no)
149    
150  dnl Checks for programs.  # Handle --enable-ebcdic
151    AC_ARG_ENABLE(ebcdic,
152                  AS_HELP_STRING([--enable-ebcdic],
153                                 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
154                  , enable_ebcdic=no)
155    
156  AC_PROG_CC  # Handle --disable-stack-for-recursion
157    AC_ARG_ENABLE(stack-for-recursion,
158                  AS_HELP_STRING([--disable-stack-for-recursion],
159                                 [don't use stack recursion when matching]),
160                  , enable_stack_for_recursion=yes)
161    
162    # Handle --enable-pcregrep-libz
163    AC_ARG_ENABLE(pcregrep-libz,
164                  AS_HELP_STRING([--enable-pcregrep-libz],
165                                 [link pcregrep with libz to handle .gz files]),
166                  , enable_pcregrep_libz=no)
167    
168    # Handle --enable-pcregrep-libbz2
169    AC_ARG_ENABLE(pcregrep-libbz2,
170                  AS_HELP_STRING([--enable-pcregrep-libbz2],
171                                 [link pcregrep with libbz2 to handle .bz2 files]),
172                  , enable_pcregrep_libbz2=no)
173    
174    # Handle --enable-pcretest-libreadline
175    AC_ARG_ENABLE(pcretest-libreadline,
176                  AS_HELP_STRING([--enable-pcretest-libreadline],
177                                 [link pcretest with libreadline]),
178                  , enable_pcretest_libreadline=no)
179    
180  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Handle --with-posix-malloc-threshold=NBYTES
181  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  AC_ARG_WITH(posix-malloc-threshold,
182  dnl though that is completely bogus. (This may happen only on certain systems              AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
183  dnl with certain versions of autoconf, of course.) An attempt to include this                             [threshold for POSIX malloc usage (default=10)]),
184  dnl test inside a check for want_cpp was criticized by a libtool expert, who              , with_posix_malloc_threshold=10)
 dnl tells me that it isn't allowed.  
185    
186  AC_PROG_CXX  # Handle --with-link-size=N
187    AC_ARG_WITH(link-size,
188                AS_HELP_STRING([--with-link-size=N],
189                               [internal link size (2, 3, or 4 allowed; default=2)]),
190                , with_link_size=2)
191    
192  dnl The icc compiler has the same options as gcc, so let the rest of the  # Handle --with-match-limit=N
193  dnl configure script think it has gcc when setting up dnl options etc.  AC_ARG_WITH(match-limit,
194  dnl This is a nasty hack which no longer seems necessary with the update              AS_HELP_STRING([--with-match-limit=N],
195  dnl to the latest libtool files, so I have commented it out.                             [default limit on internal looping (default=10000000)]),
196  dnl              , with_match_limit=10000000)
197  dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
198    # Handle --with-match-limit_recursion=N
199    #
200    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
201    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
202    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
203    # different numeric value (or even the same numeric value as MATCH_LIMIT,
204    # though no longer defined in terms of the latter).
205    #
206    AC_ARG_WITH(match-limit-recursion,
207                AS_HELP_STRING([--with-match-limit-recursion=N],
208                               [default limit on internal recursion (default=MATCH_LIMIT)]),
209                , with_match_limit_recursion=MATCH_LIMIT)
210    
211    # Make sure that if enable_unicode_properties was set, that UTF-8 support
212    # is enabled.
213    #
214    if test "x$enable_unicode_properties" = "xyes"
215    then
216      if test "x$enable_utf8" = "xno"
217      then
218        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
219      fi
220      enable_utf8=yes
221    fi
222    
223  AC_PROG_INSTALL  if test "x$enable_utf8" = "xunset"
224  AC_LIBTOOL_WIN32_DLL  then
225  AC_PROG_LIBTOOL    enable_utf8=no
226    fi
227    
228  dnl We need to find a compiler for compiling a program to run on the local host  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
229  dnl while building. It needs to be different from CC when cross-compiling.  # Also check that UTF-8 support is not requested, because PCRE cannot handle
230  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for  # EBCDIC and UTF-8 in the same build. To do so it would need to use different
231  dnl figuring this out automatically. Unfortunately, it does not work with the  # character constants depending on the mode.
232  dnl latest versions of autoconf. So for the moment, we just default to the  #
233  dnl same values as the "main" compiler. People who are cross-compiling will  if test "x$enable_ebcdic" = "xyes"
234  dnl just have to adjust the Makefile by hand or set these values when they  then
235  dnl run "configure".    enable_rebuild_chartables=yes
236      if test "x$enable_utf8" = "xyes"
237  CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}    then
238  CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}      AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
239  CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}    fi
240  CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'}  fi
 CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'}  
 BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}  
 BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}  
241    
242  dnl Checks for header files.  # Convert the newline identifier into the appropriate integer value.
243    case "$enable_newline" in
244      lf)      ac_pcre_newline_value=10   ;;
245      cr)      ac_pcre_newline_value=13   ;;
246      crlf)    ac_pcre_newline_value=3338 ;;
247      anycrlf) ac_pcre_newline_value=-2   ;;
248      any)     ac_pcre_newline_value=-1   ;;
249      *)
250      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
251      ;;
252    esac
253    
254  AC_HEADER_STDC  # Check argument to --with-link-size
255  AC_CHECK_HEADERS(limits.h)  case "$with_link_size" in
256      2|3|4) ;;
257      *)
258      AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
259      ;;
260    esac
261    
262  dnl The files below are C++ header files. One person told me (PH) that  AH_TOP([
263  dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  /* On Unix-like systems config.h.in is converted by "configure" into config.h.
264  dnl doesn't work. However, this doesn't always seem to be the case.  Some other environments also support the use of "configure". PCRE is written in
265    Standard C, but there are a few non-standard things it can cope with, allowing
266    it to run on SunOS4 and other "close to standard" systems.
267    
268    If you are going to build PCRE "by hand" on a system without "configure" you
269    should copy the distributed config.h.generic to config.h, and then set up the
270    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
271    all of your compile commands, so that config.h is included at the start of
272    every source.
273    
274    Alternatively, you can avoid editing by using -D on the compiler command line
275    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
276    
277    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
278    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
279    them both to 0; an emulation function will be used. */])
280    
281  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # Checks for header files.
282    AC_HEADER_STDC
283    AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
284    
285    # The files below are C++ header files.
286    pcre_have_type_traits="0"
287    pcre_have_bits_type_traits="0"
288    if test "x$enable_cpp" = "xyes" -a -n "$CXX"
289  then  then
290  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
291    
292  dnl We could be more clever here, given we're doing AC_SUBST with this  # Older versions of pcre defined pcrecpp::no_arg, but in new versions
293  dnl (eg set a var to be the name of the include file we want).  But we're not  # it's called pcrecpp::RE::no_arg.  For backwards ABI compatibility,
294  dnl so it's easy to change back to 'regular' autoconf vars if we needed to.  # we want to make one an alias for the other.  Different systems do
295    # this in different ways.  Some systems, for instance, can do it via
296    # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
297    OLD_LDFLAGS="$LDFLAGS"
298    for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
299                "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
300      AC_MSG_CHECKING([for alias support in the linker])
301      LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
302      # We try to run the linker with this new ld flag.  If the link fails,
303      # we give up and remove the new flag from LDFLAGS.
304      AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
305                                        class RE { static int no_arg; };
306                                        int RE::no_arg;
307                                      }],
308                                     []),
309                     [AC_MSG_RESULT([yes]);
310                      EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
311                      break;],
312                     AC_MSG_RESULT([no]))
313    done
314    LDFLAGS="$OLD_LDFLAGS"
315    
316    # We could be more clever here, given we're doing AC_SUBST with this
317    # (eg set a var to be the name of the include file we want). But we're not
318    # so it's easy to change back to 'regular' autoconf vars if we needed to.
319  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
320                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
321  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
322                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
323  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
324                                  [pcre_have_type_traits="0"])                                  [pcre_have_type_traits="0"])
 dnl Using AC_SUBST eliminates the need to include config.h in a public .h file  
 AC_SUBST(pcre_have_bits_type_traits)  
 AC_SUBST(pcre_have_type_traits)  
 AC_LANG_RESTORE  
 fi  
325    
326  dnl From the above, we now have enough info to know if C++ is fully installed  AC_LANG_POP
 if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then  
   MAYBE_CPP_TARGETS='$(CPP_TARGETS)'  
   HAVE_CPP=  
 else  
   MAYBE_CPP_TARGETS=  
   HAVE_CPP="#"  
327  fi  fi
328  AC_SUBST(MAYBE_CPP_TARGETS)  # Using AC_SUBST eliminates the need to include config.h in a public .h file
329  AC_SUBST(HAVE_CPP)  AC_SUBST(pcre_have_type_traits)
330    AC_SUBST(pcre_have_bits_type_traits)
331    
332  dnl Checks for typedefs, structures, and compiler characteristics.  # Conditional compilation
333    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
334    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
335    
336    # Checks for typedefs, structures, and compiler characteristics.
337    
338  AC_C_CONST  AC_C_CONST
339  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
340    
341  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  pcre_have_strotolonglong=0
342  AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])  AC_CHECK_FUNCS(strtoq strtoll _strtoi64, [pcre_have_strotolonglong="1"; break])
343    # If we can't convert a string to a long long, pretend we don't even
344    # have a long long.
345    if test $pcre_have_strotolonglong = "0"; then
346       pcre_have_long_long="0"
347       pcre_have_ulong_long="0"
348    else
349      AC_CHECK_TYPES([long long],
350                     [pcre_have_long_long="1"],
351                     [pcre_have_long_long="0"])
352      AC_CHECK_TYPES([unsigned long long],
353                     [pcre_have_ulong_long="1"],
354                     [pcre_have_ulong_long="0"])
355    fi
356  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
357  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
358    
359  dnl Checks for library functions.  # Checks for library functions.
360    
361  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  AC_CHECK_FUNCS(bcopy memmove strerror)
362    
363  dnl Handle --enable-utf8  # Check for the availability of libz (aka zlib)
364    
365  AC_ARG_ENABLE(utf8,  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
366  [  --enable-utf8           enable UTF8 support],  AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
 if test "$enableval" = "yes"; then  
   UTF8=-DSUPPORT_UTF8  
 fi  
 )  
367    
368  dnl Handle --enable-unicode-properties  # Check for the availability of libbz2
369    
370  AC_ARG_ENABLE(unicode-properties,  AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
371  [  --enable-unicode-properties  enable Unicode properties support],  AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
 if test "$enableval" = "yes"; then  
   UCP=-DSUPPORT_UCP  
 fi  
 )  
372    
373  dnl Handle --enable-newline-is-cr  # Check for the availabiity of libreadline
374    
375  AC_ARG_ENABLE(newline-is-cr,  AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
376  [  --enable-newline-is-cr  use CR as the newline character],  AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
377  if test "$enableval" = "yes"; then  AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
   NEWLINE=-DNEWLINE=13  
 fi  
 )  
378    
379  dnl Handle --enable-newline-is-lf  # This facilitates -ansi builds under Linux
380    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
381    
382  AC_ARG_ENABLE(newline-is-lf,  if test "x$enable_shared" = "xno" ; then
383  [  --enable-newline-is-lf  use LF as the newline character],    AC_DEFINE([PCRE_STATIC], [1], [
384  if test "$enableval" = "yes"; then      Define if linking statically (TODO: make nice with Libtool)])
   NEWLINE=-DNEWLINE=10  
385  fi  fi
 )  
386    
387  dnl Handle --enable-ebcdic  # Here is where pcre specific defines are handled
388    
389  AC_ARG_ENABLE(ebcdic,  if test "$enable_utf8" = "yes"; then
390  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],    AC_DEFINE([SUPPORT_UTF8], [], [
391  if test "$enableval" == "yes"; then      Define to enable support for the UTF-8 Unicode encoding. This will
392    EBCDIC=-DEBCDIC=1      work even in an EBCDIC environment, but it is incompatible with
393        the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
394        *or* ASCII/UTF-8, but not both at once.])
395  fi  fi
 )  
396    
397  dnl Handle --disable-stack-for-recursion  if test "$enable_unicode_properties" = "yes"; then
398      AC_DEFINE([SUPPORT_UCP], [], [
399        Define to enable support for Unicode properties])
400    fi
401    
402  AC_ARG_ENABLE(stack-for-recursion,  if test "$enable_stack_for_recursion" = "no"; then
403  [  --disable-stack-for-recursion  disable use of stack recursion when matching],    AC_DEFINE([NO_RECURSE], [], [
404  if test "$enableval" = "no"; then      PCRE uses recursive function calls to handle backtracking while
405    NO_RECURSE=-DNO_RECURSE      matching. This can sometimes be a problem on systems that have
406        stacks of limited size. Define NO_RECURSE to get a version that
407        doesn't use recursion in the match() function; instead it creates
408        its own stack by steam using pcre_recurse_malloc() to obtain memory
409        from the heap. For more detail, see the comments and other stuff
410        just above the match() function. On systems that support it,
411        "configure" can be used to set this in the Makefile
412        (use --disable-stack-for-recursion).])
413  fi  fi
 )  
414    
415  dnl There doesn't seem to be a straightforward way of having parameters  if test "$enable_pcregrep_libz" = "yes"; then
416  dnl that set values, other than fudging the --with thing. So that's what    AC_DEFINE([SUPPORT_LIBZ], [], [
417  dnl I've done.      Define to allow pcregrep to be linked with libz, so that it is
418        able to handle .gz files.])
419    fi
420    
421  dnl Handle --with-posix-malloc-threshold=n  if test "$enable_pcregrep_libbz2" = "yes"; then
422      AC_DEFINE([SUPPORT_LIBBZ2], [], [
423        Define to allow pcregrep to be linked with libbz2, so that it is
424        able to handle .bz2 files.])
425    fi
426    
427  AC_ARG_WITH(posix-malloc-threshold,  if test "$enable_pcretest_libreadline" = "yes"; then
428  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],    AC_DEFINE([SUPPORT_LIBREADLINE], [], [
429    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval      Define to allow pcretest to be linked with libreadline.])
430  )  fi
431    
432  dnl Handle --with-link-size=n  AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
433      The value of NEWLINE determines the newline character sequence. On
434      systems that support it, "configure" can be used to override the
435      default, which is 10. The possible values are 10 (LF), 13 (CR),
436      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
437    
438    if test "$enable_bsr_anycrlf" = "yes"; then
439      AC_DEFINE([BSR_ANYCRLF], [], [
440        By default, the \R escape sequence matches any Unicode line ending
441        character or sequence of characters. If BSR_ANYCRLF is defined, this is
442        changed so that backslash-R matches only CR, LF, or CRLF. The build-
443        time default can be overridden by the user of PCRE at runtime. On
444        systems that support it, "configure" can be used to override the
445        default.])
446    fi
447    
448  AC_ARG_WITH(link-size,  AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
449  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],    The value of LINK_SIZE determines the number of bytes used to store
450    LINK_SIZE=-DLINK_SIZE=$withval    links as offsets within the compiled regex. The default is 2, which
451  )    allows for compiled patterns up to 64K long. This covers the vast
452      majority of cases. However, PCRE can also be compiled to use 3 or 4
453      bytes instead. This allows for longer patterns in extreme cases. On
454      systems that support it, "configure" can be used to override this default.])
455    
456    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
457      When calling PCRE via the POSIX interface, additional working storage
458      is required for holding the pointers to capturing substrings because
459      PCRE requires three integers per substring, whereas the POSIX
460      interface provides only two. If the number of expected substrings is
461      small, the wrapper function uses space on the stack, because this is
462      faster than using malloc() for each call. The threshold above which
463      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
464      systems that support it, "configure" can be used to override this
465      default.])
466    
467    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
468      The value of MATCH_LIMIT determines the default number of times the
469      internal match() function can be called during a single execution of
470      pcre_exec(). There is a runtime interface for setting a different
471      limit. The limit exists in order to catch runaway regular
472      expressions that take for ever to determine that they do not match.
473      The default is set very large so that it does not accidentally catch
474      legitimate cases. On systems that support it, "configure" can be
475      used to override this default default.])
476    
477    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
478      The above limit applies to all calls of match(), whether or not they
479      increase the recursion depth. In some environments it is desirable
480      to limit the depth of recursive calls of match() more strictly, in
481      order to restrict the maximum amount of stack (or heap, if
482      NO_RECURSE is defined) that is used. The value of
483      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
484      have any useful effect, it must be less than the value of
485      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
486      There is a runtime method for setting a different limit. On systems
487      that support it, "configure" can be used to override the default.])
488    
489    AC_DEFINE([MAX_NAME_SIZE], [32], [
490      This limit is parameterized just in case anybody ever wants to
491      change it. Care must be taken if it is increased, because it guards
492      against integer overflow caused by enormously large patterns.])
493    
494    AC_DEFINE([MAX_NAME_COUNT], [10000], [
495      This limit is parameterized just in case anybody ever wants to
496      change it. Care must be taken if it is increased, because it guards
497      against integer overflow caused by enormously large patterns.])
498    
499    AH_VERBATIM([PCRE_EXP_DEFN], [
500    /* If you are compiling for a system other than a Unix-like system or
501       Win32, and it needs some magic to be inserted before the definition
502       of a function that is exported by the library, define this macro to
503       contain the relevant magic. If you do not define this macro, it
504       defaults to "extern" for a C compiler and "extern C" for a C++
505       compiler on non-Win32 systems. This macro apears at the start of
506       every exported function that is part of the external API. It does
507       not appear on functions that are "external" in the C sense, but
508       which are internal to the library. */
509    #undef PCRE_EXP_DEFN])
510    
511    if test "$enable_ebcdic" = "yes"; then
512      AC_DEFINE_UNQUOTED([EBCDIC], [], [
513        If you are compiling for a system that uses EBCDIC instead of ASCII
514        character codes, define this macro as 1. On systems that can use
515        "configure", this can be done via --enable-ebcdic. PCRE will then
516        assume that all input strings are in EBCDIC. If you do not define
517        this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
518        It is not possible to build a version of PCRE that supports both
519        EBCDIC and UTF-8.])
520    fi
521    
522  dnl Handle --with-match-limit=n  # Platform specific issues
523    NO_UNDEFINED=
524    EXPORT_ALL_SYMBOLS=
525    case $host_os in
526      cygwin* | mingw* )
527        if test X"$enable_shared" = Xyes; then
528          NO_UNDEFINED="-no-undefined"
529          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
530        fi
531        ;;
532    esac
533    
534  AC_ARG_WITH(match-limit,  # The extra LDFLAGS for each particular library
535  [  --with-match-limit=10000000  default limit on internal looping],  # (Note: The libpcre*_version bits are m4 variables, assigned above)
   MATCH_LIMIT=-DMATCH_LIMIT=$withval  
 )  
536    
537  dnl Handle --with-match-limit_recursion=n  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
538                           $NO_UNDEFINED -version-info libpcre_version"
539    
540  AC_ARG_WITH(match-limit-recursion,  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
541  [  --with-match-limit-recursion=10000000  default limit on internal recursion],                              $NO_UNDEFINED -version-info libpcreposix_version"
   MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval  
 )  
542    
543  dnl Unicode character property support implies UTF-8 support  EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
544                              $NO_UNDEFINED -version-info libpcrecpp_version \
545                              $EXPORT_ALL_SYMBOLS"
546    
547    AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
548    AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
549    AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
550    
551    # When we run 'make distcheck', use these arguments.
552    DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
553    AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
554    
555    # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
556    # specified, the relevant library is available.
557    
558    if test "$enable_pcregrep_libz" = "yes"; then
559      if test "$HAVE_ZLIB_H" != "1"; then
560        echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
561        exit 1
562      fi
563      if test "$HAVE_LIBZ" != "1"; then
564        echo "** Cannot --enable-pcregrep-libz because libz was not found"
565        exit 1
566      fi
567      LIBZ="-lz"
568    fi
569    AC_SUBST(LIBZ)
570    
571  if test "$UCP" != "" ; then  if test "$enable_pcregrep_libbz2" = "yes"; then
572    UTF8=-DSUPPORT_UTF8    if test "$HAVE_BZLIB_H" != "1"; then
573        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
574        exit 1
575      fi
576      if test "$HAVE_LIBBZ2" != "1"; then
577        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
578        exit 1
579      fi
580      LIBBZ2="-lbz2"
581  fi  fi
582    AC_SUBST(LIBBZ2)
583    
584  dnl "Export" these variables  # Similarly for --enable-pcretest-readline
585    
586  AC_SUBST(BUILD_EXEEXT)  if test "$enable_pcretest_libreadline" = "yes"; then
587  AC_SUBST(BUILD_OBJEXT)    if test "$HAVE_READLINE_H" != "1"; then
588  AC_SUBST(CC_FOR_BUILD)      echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
589  AC_SUBST(CXX_FOR_BUILD)      exit 1
590  AC_SUBST(CFLAGS_FOR_BUILD)    fi
591  AC_SUBST(CXXFLAGS_FOR_BUILD)    if test "$HAVE_HISTORY_H" != "1"; then
592  AC_SUBST(CXXLDFLAGS)      echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
593  AC_SUBST(EBCDIC)      exit 1
594  AC_SUBST(HAVE_MEMMOVE)    fi
595  AC_SUBST(HAVE_STRERROR)    LIBREADLINE="-lreadline"
596  AC_SUBST(LINK_SIZE)  fi
597  AC_SUBST(MATCH_LIMIT)  AC_SUBST(LIBREADLINE)
 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)  
598    
599  dnl Stuff to make MinGW work better. Special treatment is no longer  # Produce these files, in addition to config.h.
600  dnl needed for Cygwin.  AC_CONFIG_FILES(
601            Makefile
602            libpcre.pc
603            libpcrecpp.pc
604            pcre-config
605            pcre.h
606            pcre_stringpiece.h
607            pcrecpparg.h
608    )
609    
610  case $host_os in  # Make the generated script files executable.
611  mingw* )  AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
     POSIX_OBJ=pcreposix.o  
     POSIX_LOBJ=pcreposix.lo  
     POSIX_LIB=  
     ON_WINDOWS=  
     NOT_ON_WINDOWS="#"  
     WIN_PREFIX=  
     ;;  
 * )  
     ON_WINDOWS="#"  
     NOT_ON_WINDOWS=  
     POSIX_OBJ=  
     POSIX_LOBJ=  
     POSIX_LIB=libpcreposix.la  
     WIN_PREFIX=  
     ;;  
 esac  
 AC_SUBST(WIN_PREFIX)  
 AC_SUBST(ON_WINDOWS)  
 AC_SUBST(NOT_ON_WINDOWS)  
 AC_SUBST(POSIX_OBJ)  
 AC_SUBST(POSIX_LOBJ)  
 AC_SUBST(POSIX_LIB)  
612    
613  if test "x$enable_shared" = "xno" ; then  # Make sure that pcre_chartables.c is removed in case the method for
614      AC_DEFINE([PCRE_STATIC],[1],[to link statically])  # creating it was changed by reconfiguration.
615  fi  AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
616    
617    AC_OUTPUT
618    
619    # Print out a nice little message after configure is run displaying your
620    # chosen options.
621    
622    cat <<EOF
623    
624    $PACKAGE-$VERSION configuration summary:
625    
626        Install prefix .................. : ${prefix}
627        C preprocessor .................. : ${CPP}
628        C compiler ...................... : ${CC}
629        C++ preprocessor ................ : ${CXXCPP}
630        C++ compiler .................... : ${CXX}
631        Linker .......................... : ${LD}
632        C preprocessor flags ............ : ${CPPFLAGS}
633        C compiler flags ................ : ${CFLAGS}
634        C++ compiler flags .............. : ${CXXFLAGS}
635        Linker flags .................... : ${LDFLAGS}
636        Extra libraries ................. : ${LIBS}
637    
638        Build C++ library ............... : ${enable_cpp}
639        Enable UTF-8 support ............ : ${enable_utf8}
640        Unicode properties .............. : ${enable_unicode_properties}
641        Newline char/sequence ........... : ${enable_newline}
642        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
643        EBCDIC coding ................... : ${enable_ebcdic}
644        Rebuild char tables ............. : ${enable_rebuild_chartables}
645        Use stack recursion ............. : ${enable_stack_for_recursion}
646        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
647        Internal link size .............. : ${with_link_size}
648        Match limit ..................... : ${with_match_limit}
649        Match limit recursion ........... : ${with_match_limit_recursion}
650        Build shared libs ............... : ${enable_shared}
651        Build static libs ............... : ${enable_static}
652        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
653        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
654        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
655    
656    EOF
657    
658  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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