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revision 96 by nigel, Fri Mar 2 13:10:43 2007 UTC revision 309 by ph10, Mon Jan 21 15:22:09 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, [6])
11    m4_define(pcre_prerelease, [-RC1])
12    m4_define(pcre_date, [2008-01-21])
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 "$CFLAGS" = "-g"
47      then
48        CFLAGS=""
49      fi
50    fi
51    
52  dnl Arrange to build config.h from config.h.in.  if test "x$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    
 dnl Default values for miscellaneous macros  
63    
64  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  AC_PROG_INSTALL
65    AC_LIBTOOL_WIN32_DLL
66    AC_PROG_LIBTOOL
67    AC_PROG_LN_S
68    
69  dnl Provide versioning information for libtool shared libraries that  PCRE_MAJOR="pcre_major"
70  dnl are built by default on Unix systems.  PCRE_MINOR="pcre_minor"
71    PCRE_PRERELEASE="pcre_prerelease"
72    PCRE_DATE="pcre_date"
73    
74    AC_SUBST(PCRE_MAJOR)
75    AC_SUBST(PCRE_MINOR)
76    AC_SUBST(PCRE_PRERELEASE)
77    AC_SUBST(PCRE_DATE)
78    
79  PCRE_LIB_VERSION=0:1:0  # Set a more sensible default value for $(htmldir).
80  PCRE_POSIXLIB_VERSION=0:0:0  if test "x$htmldir" = 'x${docdir}'
81  PCRE_CPPLIB_VERSION=0:0:0  then
82      htmldir='${docdir}/html'
83    fi
84    
85  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  # Handle --disable-cpp
86  dnl substituted in pcre-config.in.  AC_ARG_ENABLE(cpp,
87                  AS_HELP_STRING([--disable-cpp],
88                                 [disable C++ support]),
89                  , enable_cpp=yes)
90    
91    # Handle --enable-rebuild-chartables
92    AC_ARG_ENABLE(rebuild-chartables,
93                  AS_HELP_STRING([--enable-rebuild-chartables],
94                                 [rebuild character tables in current locale]),
95                  , enable_rebuild_chartables=no)
96    
97  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  # Handle --enable-utf8 (disabled by default)
98  PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  AC_ARG_ENABLE(utf8,
99  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`                AS_HELP_STRING([--enable-utf8],
100  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}                               [enable UTF-8 support]),
101                  , enable_utf8=unset)
102    
103  dnl Handle --disable-cpp  # Handle --enable-unicode-properties
104    AC_ARG_ENABLE(unicode-properties,
105                  AS_HELP_STRING([--enable-unicode-properties],
106                                 [enable Unicode properties support (implies --enable-utf8)]),
107                  , enable_unicode_properties=no)
108    
109    # Handle --enable-newline=NL
110    dnl AC_ARG_ENABLE(newline,
111    dnl               AS_HELP_STRING([--enable-newline=NL],
112    dnl                              [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
113    dnl               , enable_newline=lf)
114    
115  AC_ARG_ENABLE(cpp,  # Separate newline options
116  [  --disable-cpp           disable C++ support],  ac_pcre_newline=lf
117  want_cpp="$enableval", want_cpp=yes)  AC_ARG_ENABLE(newline-is-cr,
118                  AS_HELP_STRING([--enable-newline-is-cr],
119                                 [use CR as newline character]),
120                  ac_pcre_newline=cr)
121    AC_ARG_ENABLE(newline-is-lf,
122                  AS_HELP_STRING([--enable-newline-is-lf],
123                                 [use LF as newline character (default)]),
124                  ac_pcre_newline=lf)
125    AC_ARG_ENABLE(newline-is-crlf,
126                  AS_HELP_STRING([--enable-newline-is-crlf],
127                                 [use CRLF as newline sequence]),
128                  ac_pcre_newline=crlf)
129    AC_ARG_ENABLE(newline-is-anycrlf,
130                  AS_HELP_STRING([--enable-newline-is-anycrlf],
131                                 [use CR, LF, or CRLF as newline sequence]),
132                  ac_pcre_newline=anycrlf)
133    AC_ARG_ENABLE(newline-is-any,
134                  AS_HELP_STRING([--enable-newline-is-any],
135                                 [use any valid Unicode newline sequence]),
136                  ac_pcre_newline=any)
137    enable_newline="$ac_pcre_newline"
138    
139    # Handle --enable-bsr-anycrlf
140    AC_ARG_ENABLE(bsr-anycrlf,
141                  AS_HELP_STRING([--enable-bsr-anycrlf],
142                                 [\R matches only CR, LF, CRLF by default]),
143                  , enable_bsr_anycrlf=no)
144    
145  dnl Checks for programs.  # Handle --enable-ebcdic
146    AC_ARG_ENABLE(ebcdic,
147                  AS_HELP_STRING([--enable-ebcdic],
148                                 [assume EBCDIC coding rather than ASCII; use this only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
149                  , enable_ebcdic=no)
150    
151  AC_PROG_CC  # Handle --disable-stack-for-recursion
152    AC_ARG_ENABLE(stack-for-recursion,
153                  AS_HELP_STRING([--disable-stack-for-recursion],
154                                 [don't use stack recursion when matching]),
155                  , enable_stack_for_recursion=yes)
156    
157    # Handle --enable-pcregrep-libz
158    AC_ARG_ENABLE(pcregrep-libz,
159                  AS_HELP_STRING([--enable-pcregrep-libz],
160                                 [link pcregrep with libz to handle .gz files]),
161                  , enable_pcregrep_libz=no)
162    
163    # Handle --enable-pcregrep-libbz2
164    AC_ARG_ENABLE(pcregrep-libbz2,
165                  AS_HELP_STRING([--enable-pcregrep-libbz2],
166                                 [link pcregrep with libbz2 to handle .bz2 files]),
167                  , enable_pcregrep_libbz2=no)
168    
169    # Handle --enable-pcretest-libreadline
170    AC_ARG_ENABLE(pcretest-libreadline,
171                  AS_HELP_STRING([--enable-pcretest-libreadline],
172                                 [link pcretest with libreadline]),
173                  , enable_pcretest_libreadline=no)
174    
175  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Handle --with-posix-malloc-threshold=NBYTES
176  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  AC_ARG_WITH(posix-malloc-threshold,
177  dnl though that is completely bogus. (This may happen only on certain systems              AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
178  dnl with certain versions of autoconf, of course.) An attempt to include this                             [threshold for POSIX malloc usage (default=10)]),
179  dnl test inside a check for want_cpp was criticized by a libtool expert, who              , with_posix_malloc_threshold=10)
 dnl tells me that it isn't allowed.  
180    
181  AC_PROG_CXX  # Handle --with-link-size=N
182    AC_ARG_WITH(link-size,
183                AS_HELP_STRING([--with-link-size=N],
184                               [internal link size (2, 3, or 4 allowed; default=2)]),
185                , with_link_size=2)
186    
187  dnl The icc compiler has the same options as gcc, so let the rest of the  # Handle --with-match-limit=N
188  dnl configure script think it has gcc when setting up dnl options etc.  AC_ARG_WITH(match-limit,
189  dnl This is a nasty hack which no longer seems necessary with the update              AS_HELP_STRING([--with-match-limit=N],
190  dnl to the latest libtool files, so I have commented it out.                             [default limit on internal looping (default=10000000)]),
191  dnl              , with_match_limit=10000000)
192  dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
193    # Handle --with-match-limit_recursion=N
194    #
195    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
196    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
197    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
198    # different numeric value (or even the same numeric value as MATCH_LIMIT,
199    # though no longer defined in terms of the latter).
200    #
201    AC_ARG_WITH(match-limit-recursion,
202                AS_HELP_STRING([--with-match-limit-recursion=N],
203                               [default limit on internal recursion (default=MATCH_LIMIT)]),
204                , with_match_limit_recursion=MATCH_LIMIT)
205    
206    # Make sure that if enable_unicode_properties was set, that UTF-8 support
207    # is enabled.
208    #
209    if test "x$enable_unicode_properties" = "xyes"
210    then
211      if test "x$enable_utf8" = "xno"
212      then
213        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
214      fi
215      enable_utf8=yes
216    fi
217    
218  AC_PROG_INSTALL  if test "x$enable_utf8" = "xunset"
219  AC_LIBTOOL_WIN32_DLL  then
220  AC_PROG_LIBTOOL    enable_utf8=no
221    fi
222    
223  dnl We need to find a compiler for compiling a program to run on the local host  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
224  dnl while building. It needs to be different from CC when cross-compiling.  #
225  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for  if test "x$enable_ebcdic" = "xyes"
226  dnl figuring this out automatically. Unfortunately, it does not work with the  then
227  dnl latest versions of autoconf. So for the moment, we just default to the    enable_rebuild_chartables=yes
228  dnl same values as the "main" compiler. People who are cross-compiling will  fi
 dnl just have to adjust the Makefile by hand or set these values when they  
 dnl run "configure".  
   
 CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}  
 CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}  
 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)'}  
229    
230  dnl Checks for header files.  # Convert the newline identifier into the appropriate integer value.
231    case "$enable_newline" in
232      lf)      ac_pcre_newline_value=10   ;;
233      cr)      ac_pcre_newline_value=13   ;;
234      crlf)    ac_pcre_newline_value=3338 ;;
235      anycrlf) ac_pcre_newline_value=-2   ;;
236      any)     ac_pcre_newline_value=-1   ;;
237      *)
238      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
239      ;;
240    esac
241    
242  AC_HEADER_STDC  # Check argument to --with-link-size
243  AC_CHECK_HEADERS(limits.h)  case "$with_link_size" in
244      2|3|4) ;;
245      *)
246      AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
247      ;;
248    esac
249    
250    AH_TOP([
251    /* On Unix-like systems config.h.in is converted by "configure" into config.h.
252    Some other environments also support the use of "configure". PCRE is written in
253    Standard C, but there are a few non-standard things it can cope with, allowing
254    it to run on SunOS4 and other "close to standard" systems.
255    
256    If you are going to build PCRE "by hand" on a system without "configure" you
257    should copy the distributed config.h.generic to config.h, and then set up the
258    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
259    all of your compile commands, so that config.h is included at the start of
260    every source.
261    
262    Alternatively, you can avoid editing by using -D on the compiler command line
263    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
264    
265    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
266    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
267    them both to 0; an emulation function will be used. */])
268    
269  dnl The files below are C++ header files. One person told me (PH) that  # Checks for header files.
270  dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  AC_HEADER_STDC
271  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)
272    
273  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # The files below are C++ header files.
274    pcre_have_type_traits="0"
275    pcre_have_bits_type_traits="0"
276    if test "x$enable_cpp" = "xyes" -a -n "$CXX"
277  then  then
278  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
279    
280  dnl We could be more clever here, given we're doing AC_SUBST with this  # We could be more clever here, given we're doing AC_SUBST with this
281  dnl (eg set a var to be the name of the include file we want).  But we're not  # (eg set a var to be the name of the include file we want). But we're not
282  dnl so it's easy to change back to 'regular' autoconf vars if we needed to.  # so it's easy to change back to 'regular' autoconf vars if we needed to.
283  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
284                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
285  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"],
286                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
287  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
288                                  [pcre_have_type_traits="0"])                                  [pcre_have_type_traits="0"])
289  dnl Using AC_SUBST eliminates the need to include config.h in a public .h file  AC_LANG_POP
 AC_SUBST(pcre_have_bits_type_traits)  
 AC_SUBST(pcre_have_type_traits)  
 AC_LANG_RESTORE  
290  fi  fi
291    # Using AC_SUBST eliminates the need to include config.h in a public .h file
292    AC_SUBST(pcre_have_type_traits)
293    AC_SUBST(pcre_have_bits_type_traits)
294    
295  dnl From the above, we now have enough info to know if C++ is fully installed  # Conditional compilation
296  if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then  AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
297    MAYBE_CPP_TARGETS='$(CPP_TARGETS)'  AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
   HAVE_CPP=  
 else  
   MAYBE_CPP_TARGETS=  
   HAVE_CPP="#"  
 fi  
 AC_SUBST(MAYBE_CPP_TARGETS)  
 AC_SUBST(HAVE_CPP)  
298    
299  dnl Checks for typedefs, structures, and compiler characteristics.  # Checks for typedefs, structures, and compiler characteristics.
300    
301  AC_C_CONST  AC_C_CONST
302  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
303    
304  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  AC_CHECK_TYPES([long long],
305  AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])                 [pcre_have_long_long="1"],
306                   [pcre_have_long_long="0"])
307    AC_CHECK_TYPES([unsigned long long],
308                   [pcre_have_ulong_long="1"],
309                   [pcre_have_ulong_long="0"])
310  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
311  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
312    
313  dnl Checks for library functions.  # Checks for library functions.
   
 AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  
   
 dnl Handle --enable-utf8  
   
 AC_ARG_ENABLE(utf8,  
 [  --enable-utf8           enable UTF8 support],  
 if test "$enableval" = "yes"; then  
   UTF8=-DSUPPORT_UTF8  
 fi  
 )  
   
 dnl Handle --enable-unicode-properties  
314    
315  AC_ARG_ENABLE(unicode-properties,  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll _strtoi64)
 [  --enable-unicode-properties  enable Unicode properties support],  
 if test "$enableval" = "yes"; then  
   UCP=-DSUPPORT_UCP  
 fi  
 )  
316    
317  dnl Handle --enable-newline-is-cr  # Check for the availability of libz (aka zlib)
318    
319  AC_ARG_ENABLE(newline-is-cr,  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
320  [  --enable-newline-is-cr  use CR as the newline character],  AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=13  
 fi  
 )  
321    
322  dnl Handle --enable-newline-is-lf  # Check for the availability of libbz2
323    
324  AC_ARG_ENABLE(newline-is-lf,  AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
325  [  --enable-newline-is-lf  use LF as the newline character],  AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=10  
 fi  
 )  
326    
327  dnl Handle --enable-newline-is-crlf  # Check for the availabiity of libreadline
328    
329  AC_ARG_ENABLE(newline-is-crlf,  AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
330  [  --enable-newline-is-crlf  use CRLF as the newline sequence],  AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
331  if test "$enableval" = "yes"; then  AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
   NEWLINE=-DNEWLINE=3338  
 fi  
 )  
332    
333  dnl Handle --enable-newline-is-any  # This facilitates -ansi builds under Linux
334    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
335    
336  AC_ARG_ENABLE(newline-is-any,  if test "x$enable_shared" = "xno" ; then
337  [  --enable-newline-is-any  use any Unicode newline sequence],    AC_DEFINE([PCRE_STATIC], [1], [
338  if test "$enableval" = "yes"; then      Define if linking statically (TODO: make nice with Libtool)])
   NEWLINE=-DNEWLINE=-1  
 fi  
 )  
   
 dnl Handle --enable-ebcdic  
   
 AC_ARG_ENABLE(ebcdic,  
 [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],  
 if test "$enableval" = "yes"; then  
   EBCDIC=-DEBCDIC=1  
 fi  
 )  
   
 dnl Handle --disable-stack-for-recursion  
   
 AC_ARG_ENABLE(stack-for-recursion,  
 [  --disable-stack-for-recursion  disable use of stack recursion when matching],  
 if test "$enableval" = "no"; then  
   NO_RECURSE=-DNO_RECURSE  
339  fi  fi
 )  
340    
341  dnl There doesn't seem to be a straightforward way of having parameters  # Here is where pcre specific defines are handled
 dnl that set values, other than fudging the --with thing. So that's what  
 dnl I've done.  
342    
343  dnl Handle --with-posix-malloc-threshold=n  if test "$enable_utf8" = "yes"; then
344      AC_DEFINE([SUPPORT_UTF8], [], [
345  AC_ARG_WITH(posix-malloc-threshold,      Define to enable support for the UTF-8 Unicode encoding.])
346  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],  fi
347    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval  
348  )  if test "$enable_unicode_properties" = "yes"; then
349      AC_DEFINE([SUPPORT_UCP], [], [
350  dnl Handle --with-link-size=n      Define to enable support for Unicode properties])
351    fi
352  AC_ARG_WITH(link-size,  
353  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  if test "$enable_stack_for_recursion" = "no"; then
354    LINK_SIZE=-DLINK_SIZE=$withval    AC_DEFINE([NO_RECURSE], [], [
355  )      PCRE uses recursive function calls to handle backtracking while
356        matching. This can sometimes be a problem on systems that have
357  dnl Handle --with-match-limit=n      stacks of limited size. Define NO_RECURSE to get a version that
358        doesn't use recursion in the match() function; instead it creates
359  AC_ARG_WITH(match-limit,      its own stack by steam using pcre_recurse_malloc() to obtain memory
360  [  --with-match-limit=10000000  default limit on internal looping],      from the heap. For more detail, see the comments and other stuff
361    MATCH_LIMIT=-DMATCH_LIMIT=$withval      just above the match() function. On systems that support it,
362  )      "configure" can be used to set this in the Makefile
363        (use --disable-stack-for-recursion).])
364  dnl Handle --with-match-limit_recursion=n  fi
365    
366  AC_ARG_WITH(match-limit-recursion,  if test "$enable_pcregrep_libz" = "yes"; then
367  [  --with-match-limit-recursion=10000000  default limit on internal recursion],    AC_DEFINE([SUPPORT_LIBZ], [], [
368    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval      Define to allow pcregrep to be linked with libz, so that it is
369  )      able to handle .gz files.])
370    fi
371    
372    if test "$enable_pcregrep_libbz2" = "yes"; then
373      AC_DEFINE([SUPPORT_LIBBZ2], [], [
374        Define to allow pcregrep to be linked with libbz2, so that it is
375        able to handle .bz2 files.])
376    fi
377    
378    if test "$enable_pcretest_libreadline" = "yes"; then
379      AC_DEFINE([SUPPORT_LIBREADLINE], [], [
380        Define to allow pcretest to be linked with libreadline.])
381    fi
382    
383    AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
384      The value of NEWLINE determines the newline character sequence. On
385      systems that support it, "configure" can be used to override the
386      default, which is 10. The possible values are 10 (LF), 13 (CR),
387      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
388    
389    if test "$enable_bsr_anycrlf" = "yes"; then
390      AC_DEFINE([BSR_ANYCRLF], [], [
391        By default, the \R escape sequence matches any Unicode line ending
392        character or sequence of characters. If BSR_ANYCRLF is defined, this is
393        changed so that backslash-R matches only CR, LF, or CRLF. The build-
394        time default can be overridden by the user of PCRE at runtime. On
395        systems that support it, "configure" can be used to override the
396        default.])
397    fi
398    
399    AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
400      The value of LINK_SIZE determines the number of bytes used to store
401      links as offsets within the compiled regex. The default is 2, which
402      allows for compiled patterns up to 64K long. This covers the vast
403      majority of cases. However, PCRE can also be compiled to use 3 or 4
404      bytes instead. This allows for longer patterns in extreme cases. On
405      systems that support it, "configure" can be used to override this default.])
406    
407    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
408      When calling PCRE via the POSIX interface, additional working storage
409      is required for holding the pointers to capturing substrings because
410      PCRE requires three integers per substring, whereas the POSIX
411      interface provides only two. If the number of expected substrings is
412      small, the wrapper function uses space on the stack, because this is
413      faster than using malloc() for each call. The threshold above which
414      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
415      systems that support it, "configure" can be used to override this
416      default.])
417    
418    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
419      The value of MATCH_LIMIT determines the default number of times the
420      internal match() function can be called during a single execution of
421      pcre_exec(). There is a runtime interface for setting a different
422      limit. The limit exists in order to catch runaway regular
423      expressions that take for ever to determine that they do not match.
424      The default is set very large so that it does not accidentally catch
425      legitimate cases. On systems that support it, "configure" can be
426      used to override this default default.])
427    
428    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
429      The above limit applies to all calls of match(), whether or not they
430      increase the recursion depth. In some environments it is desirable
431      to limit the depth of recursive calls of match() more strictly, in
432      order to restrict the maximum amount of stack (or heap, if
433      NO_RECURSE is defined) that is used. The value of
434      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
435      have any useful effect, it must be less than the value of
436      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
437      There is a runtime method for setting a different limit. On systems
438      that support it, "configure" can be used to override the default.])
439    
440    AC_DEFINE([MAX_NAME_SIZE], [32], [
441      This limit is parameterized just in case anybody ever wants to
442      change it. Care must be taken if it is increased, because it guards
443      against integer overflow caused by enormously large patterns.])
444    
445    AC_DEFINE([MAX_NAME_COUNT], [10000], [
446      This limit is parameterized just in case anybody ever wants to
447      change it. Care must be taken if it is increased, because it guards
448      against integer overflow caused by enormously large patterns.])
449    
450    AH_VERBATIM([PCRE_EXP_DEFN], [
451    /* If you are compiling for a system other than a Unix-like system or
452       Win32, and it needs some magic to be inserted before the definition
453       of a function that is exported by the library, define this macro to
454       contain the relevant magic. If you do not define this macro, it
455       defaults to "extern" for a C compiler and "extern C" for a C++
456       compiler on non-Win32 systems. This macro apears at the start of
457       every exported function that is part of the external API. It does
458       not appear on functions that are "external" in the C sense, but
459       which are internal to the library. */
460    #undef PCRE_EXP_DEFN])
461    
462    if test "$enable_ebcdic" = "yes"; then
463      AC_DEFINE_UNQUOTED([EBCDIC], [], [
464        If you are compiling for a system that uses EBCDIC instead of ASCII
465        character codes, define this macro as 1. On systems that can use
466        "configure", this can be done via --enable-ebcdic.])
467    fi
468    
469    # Platform specific issues
470    NO_UNDEFINED=
471    EXPORT_ALL_SYMBOLS=
472    case $host_os in
473      cygwin* | mingw* )
474        if test X"$enable_shared" = Xyes; then
475          NO_UNDEFINED="-no-undefined"
476          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
477        fi
478        ;;
479    esac
480    
481  dnl Unicode character property support implies UTF-8 support  # The extra LDFLAGS for each particular library
482    # (Note: The libpcre*_version bits are m4 variables, assigned above)
483    
484  if test "$UCP" != "" ; then  EXTRA_LIBPCRE_LDFLAGS="$NO_UNDEFINED -version-info libpcre_version"
   UTF8=-DSUPPORT_UTF8  
 fi  
485    
486  dnl "Export" these variables  EXTRA_LIBPCREPOSIX_LDFLAGS="$NO_UNDEFINED -version-info libpcreposix_version"
487    
488  AC_SUBST(BUILD_EXEEXT)  EXTRA_LIBPCRECPP_LDFLAGS="$NO_UNDEFINED $EXPORT_ALL_SYMBOLS -version-info libpcrecpp_version"
 AC_SUBST(BUILD_OBJEXT)  
 AC_SUBST(CC_FOR_BUILD)  
 AC_SUBST(CXX_FOR_BUILD)  
 AC_SUBST(CFLAGS_FOR_BUILD)  
 AC_SUBST(CXXFLAGS_FOR_BUILD)  
 AC_SUBST(CXXLDFLAGS)  
 AC_SUBST(EBCDIC)  
 AC_SUBST(HAVE_MEMMOVE)  
 AC_SUBST(HAVE_STRERROR)  
 AC_SUBST(LINK_SIZE)  
 AC_SUBST(MATCH_LIMIT)  
 AC_SUBST(MATCH_LIMIT_RECURSION)  
 AC_SUBST(NEWLINE)  
 AC_SUBST(NO_RECURSE)  
 AC_SUBST(PCRE_LIB_VERSION)  
 AC_SUBST(PCRE_POSIXLIB_VERSION)  
 AC_SUBST(PCRE_CPPLIB_VERSION)  
 AC_SUBST(PCRE_VERSION)  
 AC_SUBST(POSIX_MALLOC_THRESHOLD)  
 AC_SUBST(UCP)  
 AC_SUBST(UTF8)  
489    
490  dnl Stuff to make MinGW work better. Special treatment is no longer  AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
491  dnl needed for Cygwin.  AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
492    AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
493    
494    # When we run 'make distcheck', use these arguments.
495    DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
496    AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
497    
498    # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
499    # specified, the relevant library is available. If so, add it to LIBS.
500    
501    if test "$enable_pcregrep_libz" = "yes"; then
502      if test "$HAVE_ZLIB_H" != "1"; then
503        echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
504        exit 1
505      fi
506      if test "$HAVE_LIBZ" != "1"; then
507        echo "** Cannot --enable-pcregrep-libz because libz was not found"
508        exit 1
509      fi
510      if test "$LIBS" = ""; then LIBS=-lz; else LIBS="$LIBS -lz"; fi
511    fi
512    
513    if test "$enable_pcregrep_libbz2" = "yes"; then
514      if test "$HAVE_BZLIB_H" != "1"; then
515        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
516        exit 1
517      fi
518      if test "$HAVE_LIBBZ2" != "1"; then
519        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
520        exit 1
521      fi
522      if test "$LIBS" = ""; then LIBS=-lbz2; else LIBS="$LIBS -lbz2"; fi
523    fi
524    
525    # Similarly for --enable-pcretest-readline
526    
527    if test "$enable_pcretest_libreadline" = "yes"; then
528      if test "$HAVE_READLINE_H" != "1"; then
529        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
530        exit 1
531      fi
532      if test "$HAVE_HISTORY_H" != "1"; then
533        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
534        exit 1
535      fi
536      if test "$LIBS" = ""; then LIBS=-lreadline; else LIBS="$LIBS -lreadline"; fi
537    fi
538    
539    # Produce these files, in addition to config.h.
540    AC_CONFIG_FILES(
541            Makefile
542            libpcre.pc
543            libpcrecpp.pc
544            pcre-config
545            pcre.h
546            pcre_stringpiece.h
547            pcrecpparg.h
548    )
549    
550    # Make the generated script files executable.
551    AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
552    
553    # Make sure that pcre_chartables.c is removed in case the method for
554    # creating it was changed by reconfiguration.
555    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
556    
557    AC_OUTPUT
558    
559    # Print out a nice little message after configure is run displaying your
560    # chosen options.
561    
562    cat <<EOF
563    
564    $PACKAGE-$VERSION configuration summary:
565    
566        Install prefix .................. : ${prefix}
567        C preprocessor .................. : ${CPP}
568        C compiler ...................... : ${CC}
569        C++ preprocessor ................ : ${CXXCPP}
570        C++ compiler .................... : ${CXX}
571        Linker .......................... : ${LD}
572        C preprocessor flags ............ : ${CPPFLAGS}
573        C compiler flags ................ : ${CFLAGS}
574        C++ compiler flags .............. : ${CXXFLAGS}
575        Linker flags .................... : ${LDFLAGS}
576        Extra libraries ................. : ${LIBS}
577    
578        Build C++ library ............... : ${enable_cpp}
579        Enable UTF-8 support ............ : ${enable_utf8}
580        Unicode properties .............. : ${enable_unicode_properties}
581        Newline char/sequence ........... : ${enable_newline}
582        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
583        EBCDIC coding ................... : ${enable_ebcdic}
584        Rebuild char tables ............. : ${enable_rebuild_chartables}
585        Use stack recursion ............. : ${enable_stack_for_recursion}
586        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
587        Internal link size .............. : ${with_link_size}
588        Match limit ..................... : ${with_match_limit}
589        Match limit recursion ........... : ${with_match_limit_recursion}
590        Build shared libs ............... : ${enable_shared}
591        Build static libs ............... : ${enable_static}
592        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
593        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
594        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
595    
596  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  
597    
598  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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