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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 367 by ph10, Sun Aug 24 11:25:07 2008 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, [8])
11    m4_define(pcre_prerelease, [-RC1])
12    m4_define(pcre_date, [2008-08-25])
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="$CFLAGS"
36  AC_CONFIG_SRCDIR([pcre.h])  remember_set_CXXFLAGS="$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 "$CFLAGS" = "-g"
47      then
48        CFLAGS=""
49      fi
50    fi
51    
52    if test "x$remember_set_CXXFLAGS" = "x"
53    then
54      if test "$CXXFLAGS" = "-g -O2"
55      then
56        CXXFLAGS="-O2"
57      elif test "$CXXFLAGS" = "-g"
58      then
59        CXXFLAGS=""
60      fi
61    fi
62    
63  dnl Arrange to build config.h from config.h.in.  # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
64  dnl Manual says this macro should come right after AC_INIT.  # Check for that case, and just disable c++ code if g++ doesn't run.
65  AC_CONFIG_HEADER(config.h)  AC_LANG_PUSH(C++)
66    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
67    AC_LANG_POP
68    
69  dnl Default values for miscellaneous macros  AC_PROG_INSTALL
70    AC_LIBTOOL_WIN32_DLL
71    AC_PROG_LIBTOOL
72    AC_PROG_LN_S
73    
74  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  PCRE_MAJOR="pcre_major"
75    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  dnl Provide versioning information for libtool shared libraries that  # Set a more sensible default value for $(htmldir).
85  dnl are built by default on Unix systems.  if test "x$htmldir" = 'x${docdir}'
86    then
87      htmldir='${docdir}/html'
88    fi
89    
90  PCRE_LIB_VERSION=0:1:0  # Handle --disable-cpp
91  PCRE_POSIXLIB_VERSION=0:0:0  AC_ARG_ENABLE(cpp,
92  PCRE_CPPLIB_VERSION=0:0:0                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  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  # Handle --enable-utf8 (disabled by default)
103  dnl substituted in pcre-config.in.  AC_ARG_ENABLE(utf8,
104                  AS_HELP_STRING([--enable-utf8],
105                                 [enable UTF-8 support]),
106                  , enable_utf8=unset)
107    
108  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  # Handle --enable-unicode-properties
109  PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  AC_ARG_ENABLE(unicode-properties,
110  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`                AS_HELP_STRING([--enable-unicode-properties],
111  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}                               [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  dnl Handle --disable-cpp  # Separate newline options
121    ac_pcre_newline=lf
122    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="$ac_pcre_newline"
143    
144    # Handle --enable-bsr-anycrlf
145    AC_ARG_ENABLE(bsr-anycrlf,
146                  AS_HELP_STRING([--enable-bsr-anycrlf],
147                                 [\R matches only CR, LF, CRLF by default]),
148                  , enable_bsr_anycrlf=no)
149    
150  AC_ARG_ENABLE(cpp,  # Handle --enable-ebcdic
151  [  --disable-cpp           disable C++ support],  AC_ARG_ENABLE(ebcdic,
152  want_cpp="$enableval", want_cpp=yes)                AS_HELP_STRING([--enable-ebcdic],
153                                 [assume EBCDIC coding rather than ASCII; use this only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
154                  , enable_ebcdic=no)
155    
156  dnl Checks for programs.  # 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  AC_PROG_CC  # Handle --with-posix-malloc-threshold=NBYTES
181    AC_ARG_WITH(posix-malloc-threshold,
182                AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
183                               [threshold for POSIX malloc usage (default=10)]),
184                , with_posix_malloc_threshold=10)
185    
186  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Handle --with-link-size=N
187  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  AC_ARG_WITH(link-size,
188  dnl though that is completely bogus. (This may happen only on certain systems              AS_HELP_STRING([--with-link-size=N],
189  dnl with certain versions of autoconf, of course.) An attempt to include this                             [internal link size (2, 3, or 4 allowed; default=2)]),
190  dnl test inside a check for want_cpp was criticized by a libtool expert, who              , with_link_size=2)
 dnl tells me that it isn't allowed.  
191    
192  AC_PROG_CXX  # Handle --with-match-limit=N
193    AC_ARG_WITH(match-limit,
194                AS_HELP_STRING([--with-match-limit=N],
195                               [default limit on internal looping (default=10000000)]),
196                , with_match_limit=10000000)
197    
198    # Handle --with-match-limit_recursion=N
199    #
200    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
201    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
202    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
203    # different numeric value (or even the same numeric value as MATCH_LIMIT,
204    # though no longer defined in terms of the latter).
205    #
206    AC_ARG_WITH(match-limit-recursion,
207                AS_HELP_STRING([--with-match-limit-recursion=N],
208                               [default limit on internal recursion (default=MATCH_LIMIT)]),
209                , with_match_limit_recursion=MATCH_LIMIT)
210    
211    # Make sure that if enable_unicode_properties was set, that UTF-8 support
212    # is enabled.
213    #
214    if test "x$enable_unicode_properties" = "xyes"
215    then
216      if test "x$enable_utf8" = "xno"
217      then
218        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
219      fi
220      enable_utf8=yes
221    fi
222    
223  dnl The icc compiler has the same options as gcc, so let the rest of the  if test "x$enable_utf8" = "xunset"
224  dnl configure script think it has gcc when setting up dnl options etc.  then
225  dnl This is a nasty hack which no longer seems necessary with the update    enable_utf8=no
226  dnl to the latest libtool files, so I have commented it out.  fi
 dnl  
 dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
227    
228  AC_PROG_INSTALL  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
229  AC_LIBTOOL_WIN32_DLL  #
230  AC_PROG_LIBTOOL  if test "x$enable_ebcdic" = "xyes"
231    then
232      enable_rebuild_chartables=yes
233    fi
234    
235  dnl We need to find a compiler for compiling a program to run on the local host  # Convert the newline identifier into the appropriate integer value.
236  dnl while building. It needs to be different from CC when cross-compiling.  case "$enable_newline" in
237  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for    lf)      ac_pcre_newline_value=10   ;;
238  dnl figuring this out automatically. Unfortunately, it does not work with the    cr)      ac_pcre_newline_value=13   ;;
239  dnl latest versions of autoconf. So for the moment, we just default to the    crlf)    ac_pcre_newline_value=3338 ;;
240  dnl same values as the "main" compiler. People who are cross-compiling will    anycrlf) ac_pcre_newline_value=-2   ;;
241  dnl just have to adjust the Makefile by hand or set these values when they    any)     ac_pcre_newline_value=-1   ;;
242  dnl run "configure".    *)
243      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
244  CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}    ;;
245  CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}  esac
 CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}  
 CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'}  
 CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'}  
 BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}  
 BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}  
246    
247  dnl Checks for header files.  # Check argument to --with-link-size
248    case "$with_link_size" in
249      2|3|4) ;;
250      *)
251      AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
252      ;;
253    esac
254    
255  AC_HEADER_STDC  AH_TOP([
256  AC_CHECK_HEADERS(limits.h)  /* On Unix-like systems config.h.in is converted by "configure" into config.h.
257    Some other environments also support the use of "configure". PCRE is written in
258    Standard C, but there are a few non-standard things it can cope with, allowing
259    it to run on SunOS4 and other "close to standard" systems.
260    
261    If you are going to build PCRE "by hand" on a system without "configure" you
262    should copy the distributed config.h.generic to config.h, and then set up the
263    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
264    all of your compile commands, so that config.h is included at the start of
265    every source.
266    
267    Alternatively, you can avoid editing by using -D on the compiler command line
268    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
269    
270    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
271    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
272    them both to 0; an emulation function will be used. */])
273    
274  dnl The files below are C++ header files. One person told me (PH) that  # Checks for header files.
275  dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  AC_HEADER_STDC
276  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)
277    
278  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # The files below are C++ header files.
279    pcre_have_type_traits="0"
280    pcre_have_bits_type_traits="0"
281    if test "x$enable_cpp" = "xyes" -a -n "$CXX"
282  then  then
283  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
284    
285  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
286  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,
287  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
288    # this in different ways.  Some systems, for instance, can do it via
289    # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
290    OLD_LDFLAGS="$LDFLAGS"
291    for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
292                "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
293      AC_MSG_CHECKING([for alias support in the linker])
294      LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
295      # We try to run the linker with this new ld flag.  If the link fails,
296      # we give up and remove the new flag from LDFLAGS.
297      AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
298                                        class RE { static int no_arg; };
299                                        int RE::no_arg;
300                                      }],
301                                     []),
302                     [AC_MSG_RESULT([yes]);
303                      EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
304                      break;],
305                     AC_MSG_RESULT([no]))
306    done
307    LDFLAGS="$OLD_LDFLAGS"
308    
309    # We could be more clever here, given we're doing AC_SUBST with this
310    # (eg set a var to be the name of the include file we want). But we're not
311    # so it's easy to change back to 'regular' autoconf vars if we needed to.
312  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
313                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
314  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"],
315                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
316  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
317                                  [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  
318    
319  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="#"  
320  fi  fi
321  AC_SUBST(MAYBE_CPP_TARGETS)  # Using AC_SUBST eliminates the need to include config.h in a public .h file
322  AC_SUBST(HAVE_CPP)  AC_SUBST(pcre_have_type_traits)
323    AC_SUBST(pcre_have_bits_type_traits)
324    
325  dnl Checks for typedefs, structures, and compiler characteristics.  # Conditional compilation
326    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
327    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
328    
329    # Checks for typedefs, structures, and compiler characteristics.
330    
331  AC_C_CONST  AC_C_CONST
332  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
333    
334  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  pcre_have_strotolonglong=0
335  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])
336    # If we can't convert a string to a long long, pretend we don't even
337    # have a long long.
338    if test $pcre_have_strotolonglong = "0"; then
339       pcre_have_long_long="0"
340       pcre_have_ulong_long="0"
341    else
342      AC_CHECK_TYPES([long long],
343                     [pcre_have_long_long="1"],
344                     [pcre_have_long_long="0"])
345      AC_CHECK_TYPES([unsigned long long],
346                     [pcre_have_ulong_long="1"],
347                     [pcre_have_ulong_long="0"])
348    fi
349  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
350  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
351    
352  dnl Checks for library functions.  # Checks for library functions.
353    
354  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  AC_CHECK_FUNCS(bcopy memmove strerror)
355    
356  dnl Handle --enable-utf8  # Check for the availability of libz (aka zlib)
357    
358  AC_ARG_ENABLE(utf8,  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
359  [  --enable-utf8           enable UTF8 support],  AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
 if test "$enableval" = "yes"; then  
   UTF8=-DSUPPORT_UTF8  
 fi  
 )  
360    
361  dnl Handle --enable-unicode-properties  # Check for the availability of libbz2
362    
363  AC_ARG_ENABLE(unicode-properties,  AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
364  [  --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  
 )  
   
 dnl Handle --enable-newline-is-cr  
   
 AC_ARG_ENABLE(newline-is-cr,  
 [  --enable-newline-is-cr  use CR as the newline character],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=13  
 fi  
 )  
   
 dnl Handle --enable-newline-is-lf  
   
 AC_ARG_ENABLE(newline-is-lf,  
 [  --enable-newline-is-lf  use LF as the newline character],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=10  
 fi  
 )  
   
 dnl Handle --enable-newline-is-crlf  
   
 AC_ARG_ENABLE(newline-is-crlf,  
 [  --enable-newline-is-crlf  use CRLF as the newline sequence],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=3338  
 fi  
 )  
   
 dnl Handle --enable-newline-is-any  
   
 AC_ARG_ENABLE(newline-is-any,  
 [  --enable-newline-is-any  use any Unicode newline sequence],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=-1  
 fi  
 )  
365    
366  dnl Handle --enable-ebcdic  # Check for the availabiity of libreadline
367    
368  AC_ARG_ENABLE(ebcdic,  AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
369  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],  AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
370  if test "$enableval" = "yes"; then  AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
   EBCDIC=-DEBCDIC=1  
 fi  
 )  
371    
372  dnl Handle --disable-stack-for-recursion  # This facilitates -ansi builds under Linux
373    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
374    
375  AC_ARG_ENABLE(stack-for-recursion,  if test "x$enable_shared" = "xno" ; then
376  [  --disable-stack-for-recursion  disable use of stack recursion when matching],    AC_DEFINE([PCRE_STATIC], [1], [
377  if test "$enableval" = "no"; then      Define if linking statically (TODO: make nice with Libtool)])
   NO_RECURSE=-DNO_RECURSE  
378  fi  fi
 )  
379    
380  dnl There doesn't seem to be a straightforward way of having parameters  # Here is where pcre specific defines are handled
 dnl that set values, other than fudging the --with thing. So that's what  
 dnl I've done.  
381    
382  dnl Handle --with-posix-malloc-threshold=n  if test "$enable_utf8" = "yes"; then
383      AC_DEFINE([SUPPORT_UTF8], [], [
384  AC_ARG_WITH(posix-malloc-threshold,      Define to enable support for the UTF-8 Unicode encoding.])
385  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],  fi
386    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval  
387  )  if test "$enable_unicode_properties" = "yes"; then
388      AC_DEFINE([SUPPORT_UCP], [], [
389  dnl Handle --with-link-size=n      Define to enable support for Unicode properties])
390    fi
391  AC_ARG_WITH(link-size,  
392  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  if test "$enable_stack_for_recursion" = "no"; then
393    LINK_SIZE=-DLINK_SIZE=$withval    AC_DEFINE([NO_RECURSE], [], [
394  )      PCRE uses recursive function calls to handle backtracking while
395        matching. This can sometimes be a problem on systems that have
396  dnl Handle --with-match-limit=n      stacks of limited size. Define NO_RECURSE to get a version that
397        doesn't use recursion in the match() function; instead it creates
398  AC_ARG_WITH(match-limit,      its own stack by steam using pcre_recurse_malloc() to obtain memory
399  [  --with-match-limit=10000000  default limit on internal looping],      from the heap. For more detail, see the comments and other stuff
400    MATCH_LIMIT=-DMATCH_LIMIT=$withval      just above the match() function. On systems that support it,
401  )      "configure" can be used to set this in the Makefile
402        (use --disable-stack-for-recursion).])
403  dnl Handle --with-match-limit_recursion=n  fi
404    
405  AC_ARG_WITH(match-limit-recursion,  if test "$enable_pcregrep_libz" = "yes"; then
406  [  --with-match-limit-recursion=10000000  default limit on internal recursion],    AC_DEFINE([SUPPORT_LIBZ], [], [
407    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval      Define to allow pcregrep to be linked with libz, so that it is
408  )      able to handle .gz files.])
409    fi
410  dnl Unicode character property support implies UTF-8 support  
411    if test "$enable_pcregrep_libbz2" = "yes"; then
412      AC_DEFINE([SUPPORT_LIBBZ2], [], [
413        Define to allow pcregrep to be linked with libbz2, so that it is
414        able to handle .bz2 files.])
415    fi
416    
417    if test "$enable_pcretest_libreadline" = "yes"; then
418      AC_DEFINE([SUPPORT_LIBREADLINE], [], [
419        Define to allow pcretest to be linked with libreadline.])
420    fi
421    
422    AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
423      The value of NEWLINE determines the newline character sequence. On
424      systems that support it, "configure" can be used to override the
425      default, which is 10. The possible values are 10 (LF), 13 (CR),
426      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
427    
428    if test "$enable_bsr_anycrlf" = "yes"; then
429      AC_DEFINE([BSR_ANYCRLF], [], [
430        By default, the \R escape sequence matches any Unicode line ending
431        character or sequence of characters. If BSR_ANYCRLF is defined, this is
432        changed so that backslash-R matches only CR, LF, or CRLF. The build-
433        time default can be overridden by the user of PCRE at runtime. On
434        systems that support it, "configure" can be used to override the
435        default.])
436    fi
437    
438    AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
439      The value of LINK_SIZE determines the number of bytes used to store
440      links as offsets within the compiled regex. The default is 2, which
441      allows for compiled patterns up to 64K long. This covers the vast
442      majority of cases. However, PCRE can also be compiled to use 3 or 4
443      bytes instead. This allows for longer patterns in extreme cases. On
444      systems that support it, "configure" can be used to override this default.])
445    
446    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
447      When calling PCRE via the POSIX interface, additional working storage
448      is required for holding the pointers to capturing substrings because
449      PCRE requires three integers per substring, whereas the POSIX
450      interface provides only two. If the number of expected substrings is
451      small, the wrapper function uses space on the stack, because this is
452      faster than using malloc() for each call. The threshold above which
453      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
454      systems that support it, "configure" can be used to override this
455      default.])
456    
457    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
458      The value of MATCH_LIMIT determines the default number of times the
459      internal match() function can be called during a single execution of
460      pcre_exec(). There is a runtime interface for setting a different
461      limit. The limit exists in order to catch runaway regular
462      expressions that take for ever to determine that they do not match.
463      The default is set very large so that it does not accidentally catch
464      legitimate cases. On systems that support it, "configure" can be
465      used to override this default default.])
466    
467    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
468      The above limit applies to all calls of match(), whether or not they
469      increase the recursion depth. In some environments it is desirable
470      to limit the depth of recursive calls of match() more strictly, in
471      order to restrict the maximum amount of stack (or heap, if
472      NO_RECURSE is defined) that is used. The value of
473      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
474      have any useful effect, it must be less than the value of
475      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
476      There is a runtime method for setting a different limit. On systems
477      that support it, "configure" can be used to override the default.])
478    
479    AC_DEFINE([MAX_NAME_SIZE], [32], [
480      This limit is parameterized just in case anybody ever wants to
481      change it. Care must be taken if it is increased, because it guards
482      against integer overflow caused by enormously large patterns.])
483    
484    AC_DEFINE([MAX_NAME_COUNT], [10000], [
485      This limit is parameterized just in case anybody ever wants to
486      change it. Care must be taken if it is increased, because it guards
487      against integer overflow caused by enormously large patterns.])
488    
489    AH_VERBATIM([PCRE_EXP_DEFN], [
490    /* If you are compiling for a system other than a Unix-like system or
491       Win32, and it needs some magic to be inserted before the definition
492       of a function that is exported by the library, define this macro to
493       contain the relevant magic. If you do not define this macro, it
494       defaults to "extern" for a C compiler and "extern C" for a C++
495       compiler on non-Win32 systems. This macro apears at the start of
496       every exported function that is part of the external API. It does
497       not appear on functions that are "external" in the C sense, but
498       which are internal to the library. */
499    #undef PCRE_EXP_DEFN])
500    
501    if test "$enable_ebcdic" = "yes"; then
502      AC_DEFINE_UNQUOTED([EBCDIC], [], [
503        If you are compiling for a system that uses EBCDIC instead of ASCII
504        character codes, define this macro as 1. On systems that can use
505        "configure", this can be done via --enable-ebcdic.])
506    fi
507    
508    # Platform specific issues
509    NO_UNDEFINED=
510    EXPORT_ALL_SYMBOLS=
511    case $host_os in
512      cygwin* | mingw* )
513        if test X"$enable_shared" = Xyes; then
514          NO_UNDEFINED="-no-undefined"
515          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
516        fi
517        ;;
518    esac
519    
520  if test "$UCP" != "" ; then  # The extra LDFLAGS for each particular library
521    UTF8=-DSUPPORT_UTF8  # (Note: The libpcre*_version bits are m4 variables, assigned above)
 fi  
522    
523  dnl "Export" these variables  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
524                           $NO_UNDEFINED -version-info libpcre_version"
525    
526  AC_SUBST(BUILD_EXEEXT)  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
527  AC_SUBST(BUILD_OBJEXT)                              $NO_UNDEFINED -version-info libpcreposix_version"
 AC_SUBST(CC_FOR_BUILD)  
 AC_SUBST(CXX_FOR_BUILD)  
 AC_SUBST(CFLAGS_FOR_BUILD)  
 AC_SUBST(CXXFLAGS_FOR_BUILD)  
 AC_SUBST(CXXLDFLAGS)  
 AC_SUBST(EBCDIC)  
 AC_SUBST(HAVE_MEMMOVE)  
 AC_SUBST(HAVE_STRERROR)  
 AC_SUBST(LINK_SIZE)  
 AC_SUBST(MATCH_LIMIT)  
 AC_SUBST(MATCH_LIMIT_RECURSION)  
 AC_SUBST(NEWLINE)  
 AC_SUBST(NO_RECURSE)  
 AC_SUBST(PCRE_LIB_VERSION)  
 AC_SUBST(PCRE_POSIXLIB_VERSION)  
 AC_SUBST(PCRE_CPPLIB_VERSION)  
 AC_SUBST(PCRE_VERSION)  
 AC_SUBST(POSIX_MALLOC_THRESHOLD)  
 AC_SUBST(UCP)  
 AC_SUBST(UTF8)  
528    
529  dnl Stuff to make MinGW work better. Special treatment is no longer  EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
530  dnl needed for Cygwin.                            $NO_UNDEFINED -version-info libpcrecpp_version \
531                              $EXPORT_ALL_SYMBOLS"
532    
533    AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
534    AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
535    AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
536    
537    # When we run 'make distcheck', use these arguments.
538    DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
539    AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
540    
541    # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
542    # specified, the relevant library is available. If so, add it to LIBS.
543    
544    if test "$enable_pcregrep_libz" = "yes"; then
545      if test "$HAVE_ZLIB_H" != "1"; then
546        echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
547        exit 1
548      fi
549      if test "$HAVE_LIBZ" != "1"; then
550        echo "** Cannot --enable-pcregrep-libz because libz was not found"
551        exit 1
552      fi
553      if test "$LIBS" = ""; then LIBS=-lz; else LIBS="$LIBS -lz"; fi
554    fi
555    
556    if test "$enable_pcregrep_libbz2" = "yes"; then
557      if test "$HAVE_BZLIB_H" != "1"; then
558        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
559        exit 1
560      fi
561      if test "$HAVE_LIBBZ2" != "1"; then
562        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
563        exit 1
564      fi
565      if test "$LIBS" = ""; then LIBS=-lbz2; else LIBS="$LIBS -lbz2"; fi
566    fi
567    
568    # Similarly for --enable-pcretest-readline
569    
570    if test "$enable_pcretest_libreadline" = "yes"; then
571      if test "$HAVE_READLINE_H" != "1"; then
572        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
573        exit 1
574      fi
575      if test "$HAVE_HISTORY_H" != "1"; then
576        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
577        exit 1
578      fi
579      if test "$LIBS" = ""; then LIBS=-lreadline; else LIBS="$LIBS -lreadline"; fi
580    fi
581    
582    # Produce these files, in addition to config.h.
583    AC_CONFIG_FILES(
584            Makefile
585            libpcre.pc
586            libpcrecpp.pc
587            pcre-config
588            pcre.h
589            pcre_stringpiece.h
590            pcrecpparg.h
591    )
592    
593    # Make the generated script files executable.
594    AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
595    
596    # Make sure that pcre_chartables.c is removed in case the method for
597    # creating it was changed by reconfiguration.
598    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
599    
600    AC_OUTPUT
601    
602    # Print out a nice little message after configure is run displaying your
603    # chosen options.
604    
605    cat <<EOF
606    
607    $PACKAGE-$VERSION configuration summary:
608    
609        Install prefix .................. : ${prefix}
610        C preprocessor .................. : ${CPP}
611        C compiler ...................... : ${CC}
612        C++ preprocessor ................ : ${CXXCPP}
613        C++ compiler .................... : ${CXX}
614        Linker .......................... : ${LD}
615        C preprocessor flags ............ : ${CPPFLAGS}
616        C compiler flags ................ : ${CFLAGS}
617        C++ compiler flags .............. : ${CXXFLAGS}
618        Linker flags .................... : ${LDFLAGS}
619        Extra libraries ................. : ${LIBS}
620    
621        Build C++ library ............... : ${enable_cpp}
622        Enable UTF-8 support ............ : ${enable_utf8}
623        Unicode properties .............. : ${enable_unicode_properties}
624        Newline char/sequence ........... : ${enable_newline}
625        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
626        EBCDIC coding ................... : ${enable_ebcdic}
627        Rebuild char tables ............. : ${enable_rebuild_chartables}
628        Use stack recursion ............. : ${enable_stack_for_recursion}
629        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
630        Internal link size .............. : ${with_link_size}
631        Match limit ..................... : ${with_match_limit}
632        Match limit recursion ........... : ${with_match_limit_recursion}
633        Build shared libs ............... : ${enable_shared}
634        Build static libs ............... : ${enable_static}
635        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
636        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
637        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
638    
639  case $host_os in  EOF
 mingw* )  
     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)  
   
 if test "x$enable_shared" = "xno" ; then  
     AC_DEFINE([PCRE_STATIC],[1],[to link statically])  
 fi  
640    
641  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 libpcrecpp.pc:libpcrecpp.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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