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revision 89 by nigel, Sat Feb 24 21:41:27 2007 UTC revision 321 by ph10, Wed Mar 5 17:10:45 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, [7])
11    m4_define(pcre_prerelease, [-RC1])
12    m4_define(pcre_date, [2008-03-05])
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  dnl The files below are C++ header files. One person told me (PH) that  AH_TOP([
251  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.
252  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
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  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # Checks for header files.
270    AC_HEADER_STDC
271    AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
272    
273    # 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"])  pcre_have_strotolonglong=0
305  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])
306    # If we can't convert a string to a long long, pretend we don't even
307    # have a long long.
308    if test $pcre_have_strotolonglong = "0"; then
309       pcre_have_long_long="0"
310       pcre_have_ulong_long="0"
311    else
312      AC_CHECK_TYPES([long long],
313                     [pcre_have_long_long="1"],
314                     [pcre_have_long_long="0"])
315      AC_CHECK_TYPES([unsigned long long],
316                     [pcre_have_ulong_long="1"],
317                     [pcre_have_ulong_long="0"])
318    fi
319  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
320  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
321    
322  dnl Checks for library functions.  # Checks for library functions.
323    
324  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  AC_CHECK_FUNCS(bcopy memmove strerror)
325    
326  dnl Handle --enable-utf8  # Check for the availability of libz (aka zlib)
327    
328  AC_ARG_ENABLE(utf8,  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
329  [  --enable-utf8           enable UTF8 support],  AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
 if test "$enableval" = "yes"; then  
   UTF8=-DSUPPORT_UTF8  
 fi  
 )  
330    
331  dnl Handle --enable-unicode-properties  # Check for the availability of libbz2
332    
333  AC_ARG_ENABLE(unicode-properties,  AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
334  [  --enable-unicode-properties  enable Unicode properties support],  AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
 if test "$enableval" = "yes"; then  
   UCP=-DSUPPORT_UCP  
 fi  
 )  
335    
336  dnl Handle --enable-newline-is-cr  # Check for the availabiity of libreadline
337    
338  AC_ARG_ENABLE(newline-is-cr,  AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
339  [  --enable-newline-is-cr  use CR as the newline character],  AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
340  if test "$enableval" = "yes"; then  AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
   NEWLINE=-DNEWLINE=13  
 fi  
 )  
341    
342  dnl Handle --enable-newline-is-lf  # This facilitates -ansi builds under Linux
343    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
344    
345  AC_ARG_ENABLE(newline-is-lf,  if test "x$enable_shared" = "xno" ; then
346  [  --enable-newline-is-lf  use LF as the newline character],    AC_DEFINE([PCRE_STATIC], [1], [
347  if test "$enableval" = "yes"; then      Define if linking statically (TODO: make nice with Libtool)])
   NEWLINE=-DNEWLINE=10  
348  fi  fi
 )  
349    
350  dnl Handle --enable-ebcdic  # Here is where pcre specific defines are handled
351    
352  AC_ARG_ENABLE(ebcdic,  if test "$enable_utf8" = "yes"; then
353  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],    AC_DEFINE([SUPPORT_UTF8], [], [
354  if test "$enableval" == "yes"; then      Define to enable support for the UTF-8 Unicode encoding.])
   EBCDIC=-DEBCDIC=1  
355  fi  fi
 )  
356    
357  dnl Handle --disable-stack-for-recursion  if test "$enable_unicode_properties" = "yes"; then
358      AC_DEFINE([SUPPORT_UCP], [], [
359        Define to enable support for Unicode properties])
360    fi
361    
362  AC_ARG_ENABLE(stack-for-recursion,  if test "$enable_stack_for_recursion" = "no"; then
363  [  --disable-stack-for-recursion  disable use of stack recursion when matching],    AC_DEFINE([NO_RECURSE], [], [
364  if test "$enableval" = "no"; then      PCRE uses recursive function calls to handle backtracking while
365    NO_RECURSE=-DNO_RECURSE      matching. This can sometimes be a problem on systems that have
366        stacks of limited size. Define NO_RECURSE to get a version that
367        doesn't use recursion in the match() function; instead it creates
368        its own stack by steam using pcre_recurse_malloc() to obtain memory
369        from the heap. For more detail, see the comments and other stuff
370        just above the match() function. On systems that support it,
371        "configure" can be used to set this in the Makefile
372        (use --disable-stack-for-recursion).])
373  fi  fi
 )  
374    
375  dnl There doesn't seem to be a straightforward way of having parameters  if test "$enable_pcregrep_libz" = "yes"; then
376  dnl that set values, other than fudging the --with thing. So that's what    AC_DEFINE([SUPPORT_LIBZ], [], [
377  dnl I've done.      Define to allow pcregrep to be linked with libz, so that it is
378        able to handle .gz files.])
379    fi
380    
381  dnl Handle --with-posix-malloc-threshold=n  if test "$enable_pcregrep_libbz2" = "yes"; then
382      AC_DEFINE([SUPPORT_LIBBZ2], [], [
383        Define to allow pcregrep to be linked with libbz2, so that it is
384        able to handle .bz2 files.])
385    fi
386    
387  AC_ARG_WITH(posix-malloc-threshold,  if test "$enable_pcretest_libreadline" = "yes"; then
388  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],    AC_DEFINE([SUPPORT_LIBREADLINE], [], [
389    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval      Define to allow pcretest to be linked with libreadline.])
390  )  fi
391    
392  dnl Handle --with-link-size=n  AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
393      The value of NEWLINE determines the newline character sequence. On
394      systems that support it, "configure" can be used to override the
395      default, which is 10. The possible values are 10 (LF), 13 (CR),
396      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
397    
398    if test "$enable_bsr_anycrlf" = "yes"; then
399      AC_DEFINE([BSR_ANYCRLF], [], [
400        By default, the \R escape sequence matches any Unicode line ending
401        character or sequence of characters. If BSR_ANYCRLF is defined, this is
402        changed so that backslash-R matches only CR, LF, or CRLF. The build-
403        time default can be overridden by the user of PCRE at runtime. On
404        systems that support it, "configure" can be used to override the
405        default.])
406    fi
407    
408  AC_ARG_WITH(link-size,  AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
409  [  --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
410    LINK_SIZE=-DLINK_SIZE=$withval    links as offsets within the compiled regex. The default is 2, which
411  )    allows for compiled patterns up to 64K long. This covers the vast
412      majority of cases. However, PCRE can also be compiled to use 3 or 4
413      bytes instead. This allows for longer patterns in extreme cases. On
414      systems that support it, "configure" can be used to override this default.])
415    
416    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
417      When calling PCRE via the POSIX interface, additional working storage
418      is required for holding the pointers to capturing substrings because
419      PCRE requires three integers per substring, whereas the POSIX
420      interface provides only two. If the number of expected substrings is
421      small, the wrapper function uses space on the stack, because this is
422      faster than using malloc() for each call. The threshold above which
423      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
424      systems that support it, "configure" can be used to override this
425      default.])
426    
427    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
428      The value of MATCH_LIMIT determines the default number of times the
429      internal match() function can be called during a single execution of
430      pcre_exec(). There is a runtime interface for setting a different
431      limit. The limit exists in order to catch runaway regular
432      expressions that take for ever to determine that they do not match.
433      The default is set very large so that it does not accidentally catch
434      legitimate cases. On systems that support it, "configure" can be
435      used to override this default default.])
436    
437    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
438      The above limit applies to all calls of match(), whether or not they
439      increase the recursion depth. In some environments it is desirable
440      to limit the depth of recursive calls of match() more strictly, in
441      order to restrict the maximum amount of stack (or heap, if
442      NO_RECURSE is defined) that is used. The value of
443      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
444      have any useful effect, it must be less than the value of
445      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
446      There is a runtime method for setting a different limit. On systems
447      that support it, "configure" can be used to override the default.])
448    
449    AC_DEFINE([MAX_NAME_SIZE], [32], [
450      This limit is parameterized just in case anybody ever wants to
451      change it. Care must be taken if it is increased, because it guards
452      against integer overflow caused by enormously large patterns.])
453    
454    AC_DEFINE([MAX_NAME_COUNT], [10000], [
455      This limit is parameterized just in case anybody ever wants to
456      change it. Care must be taken if it is increased, because it guards
457      against integer overflow caused by enormously large patterns.])
458    
459    AH_VERBATIM([PCRE_EXP_DEFN], [
460    /* If you are compiling for a system other than a Unix-like system or
461       Win32, and it needs some magic to be inserted before the definition
462       of a function that is exported by the library, define this macro to
463       contain the relevant magic. If you do not define this macro, it
464       defaults to "extern" for a C compiler and "extern C" for a C++
465       compiler on non-Win32 systems. This macro apears at the start of
466       every exported function that is part of the external API. It does
467       not appear on functions that are "external" in the C sense, but
468       which are internal to the library. */
469    #undef PCRE_EXP_DEFN])
470    
471    if test "$enable_ebcdic" = "yes"; then
472      AC_DEFINE_UNQUOTED([EBCDIC], [], [
473        If you are compiling for a system that uses EBCDIC instead of ASCII
474        character codes, define this macro as 1. On systems that can use
475        "configure", this can be done via --enable-ebcdic.])
476    fi
477    
478  dnl Handle --with-match-limit=n  # Platform specific issues
479    NO_UNDEFINED=
480    EXPORT_ALL_SYMBOLS=
481    case $host_os in
482      cygwin* | mingw* )
483        if test X"$enable_shared" = Xyes; then
484          NO_UNDEFINED="-no-undefined"
485          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
486        fi
487        ;;
488    esac
489    
490  AC_ARG_WITH(match-limit,  # The extra LDFLAGS for each particular library
491  [  --with-match-limit=10000000  default limit on internal looping],  # (Note: The libpcre*_version bits are m4 variables, assigned above)
   MATCH_LIMIT=-DMATCH_LIMIT=$withval  
 )  
492    
493  dnl Handle --with-match-limit_recursion=n  EXTRA_LIBPCRE_LDFLAGS="$NO_UNDEFINED -version-info libpcre_version"
494    
495  AC_ARG_WITH(match-limit-recursion,  EXTRA_LIBPCREPOSIX_LDFLAGS="$NO_UNDEFINED -version-info libpcreposix_version"
 [  --with-match-limit-recursion=10000000  default limit on internal recursion],  
   MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval  
 )  
496    
497  dnl Unicode character property support implies UTF-8 support  EXTRA_LIBPCRECPP_LDFLAGS="$NO_UNDEFINED $EXPORT_ALL_SYMBOLS -version-info libpcrecpp_version"
498    
499  if test "$UCP" != "" ; then  AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
500    UTF8=-DSUPPORT_UTF8  AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
501    AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
502    
503    # When we run 'make distcheck', use these arguments.
504    DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
505    AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
506    
507    # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
508    # specified, the relevant library is available. If so, add it to LIBS.
509    
510    if test "$enable_pcregrep_libz" = "yes"; then
511      if test "$HAVE_ZLIB_H" != "1"; then
512        echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
513        exit 1
514      fi
515      if test "$HAVE_LIBZ" != "1"; then
516        echo "** Cannot --enable-pcregrep-libz because libz was not found"
517        exit 1
518      fi
519      if test "$LIBS" = ""; then LIBS=-lz; else LIBS="$LIBS -lz"; fi
520  fi  fi
521    
522  dnl "Export" these variables  if test "$enable_pcregrep_libbz2" = "yes"; then
523      if test "$HAVE_BZLIB_H" != "1"; then
524        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
525        exit 1
526      fi
527      if test "$HAVE_LIBBZ2" != "1"; then
528        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
529        exit 1
530      fi
531      if test "$LIBS" = ""; then LIBS=-lbz2; else LIBS="$LIBS -lbz2"; fi
532    fi
533    
534  AC_SUBST(BUILD_EXEEXT)  # Similarly for --enable-pcretest-readline
 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)  
535    
536  dnl Stuff to make MinGW work better. Special treatment is no longer  if test "$enable_pcretest_libreadline" = "yes"; then
537  dnl needed for Cygwin.    if test "$HAVE_READLINE_H" != "1"; then
538        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
539        exit 1
540      fi
541      if test "$HAVE_HISTORY_H" != "1"; then
542        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
543        exit 1
544      fi
545      if test "$LIBS" = ""; then LIBS=-lreadline; else LIBS="$LIBS -lreadline"; fi
546    fi
547    
548  case $host_os in  # Produce these files, in addition to config.h.
549  mingw* )  AC_CONFIG_FILES(
550      POSIX_OBJ=pcreposix.o          Makefile
551      POSIX_LOBJ=pcreposix.lo          libpcre.pc
552      POSIX_LIB=          libpcrecpp.pc
553      ON_WINDOWS=          pcre-config
554      NOT_ON_WINDOWS="#"          pcre.h
555      WIN_PREFIX=          pcre_stringpiece.h
556      ;;          pcrecpparg.h
557  * )  )
     ON_WINDOWS="#"  
     NOT_ON_WINDOWS=  
     POSIX_OBJ=  
     POSIX_LOBJ=  
     POSIX_LIB=libpcreposix.la  
     WIN_PREFIX=  
     ;;  
 esac  
 AC_SUBST(WIN_PREFIX)  
 AC_SUBST(ON_WINDOWS)  
 AC_SUBST(NOT_ON_WINDOWS)  
 AC_SUBST(POSIX_OBJ)  
 AC_SUBST(POSIX_LOBJ)  
 AC_SUBST(POSIX_LIB)  
558    
559  if test "x$enable_shared" = "xno" ; then  # Make the generated script files executable.
560      AC_DEFINE([PCRE_STATIC],[1],[to link statically])  AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
561  fi  
562    # Make sure that pcre_chartables.c is removed in case the method for
563    # creating it was changed by reconfiguration.
564    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
565    
566    AC_OUTPUT
567    
568    # Print out a nice little message after configure is run displaying your
569    # chosen options.
570    
571    cat <<EOF
572    
573    $PACKAGE-$VERSION configuration summary:
574    
575        Install prefix .................. : ${prefix}
576        C preprocessor .................. : ${CPP}
577        C compiler ...................... : ${CC}
578        C++ preprocessor ................ : ${CXXCPP}
579        C++ compiler .................... : ${CXX}
580        Linker .......................... : ${LD}
581        C preprocessor flags ............ : ${CPPFLAGS}
582        C compiler flags ................ : ${CFLAGS}
583        C++ compiler flags .............. : ${CXXFLAGS}
584        Linker flags .................... : ${LDFLAGS}
585        Extra libraries ................. : ${LIBS}
586    
587        Build C++ library ............... : ${enable_cpp}
588        Enable UTF-8 support ............ : ${enable_utf8}
589        Unicode properties .............. : ${enable_unicode_properties}
590        Newline char/sequence ........... : ${enable_newline}
591        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
592        EBCDIC coding ................... : ${enable_ebcdic}
593        Rebuild char tables ............. : ${enable_rebuild_chartables}
594        Use stack recursion ............. : ${enable_stack_for_recursion}
595        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
596        Internal link size .............. : ${with_link_size}
597        Match limit ..................... : ${with_match_limit}
598        Match limit recursion ........... : ${with_match_limit_recursion}
599        Build shared libs ............... : ${enable_shared}
600        Build static libs ............... : ${enable_static}
601        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
602        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
603        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
604    
605    EOF
606    
607  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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