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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 478 by ph10, Sun Jan 3 16:05:13 2010 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, [8])
10    m4_define(pcre_minor, [01])
11    m4_define(pcre_prerelease, [])
12    m4_define(pcre_date, [2010-01-02])
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    
63    # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
64    # Check for that case, and just disable c++ code if g++ doesn't run.
65    AC_LANG_PUSH(C++)
66    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
67    AC_LANG_POP
68    
69  dnl Default values for miscellaneous macros  # Check for a 64-bit integer type
70    AC_TYPE_INT64_T
71    
72  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  AC_PROG_INSTALL
73    AC_LIBTOOL_WIN32_DLL
74    AC_PROG_LIBTOOL
75    AC_PROG_LN_S
76    
77  dnl Provide versioning information for libtool shared libraries that  PCRE_MAJOR="pcre_major"
78  dnl are built by default on Unix systems.  PCRE_MINOR="pcre_minor"
79    PCRE_PRERELEASE="pcre_prerelease"
80    PCRE_DATE="pcre_date"
81    
82    AC_SUBST(PCRE_MAJOR)
83    AC_SUBST(PCRE_MINOR)
84    AC_SUBST(PCRE_PRERELEASE)
85    AC_SUBST(PCRE_DATE)
86    
87  PCRE_LIB_VERSION=0:1:0  # Set a more sensible default value for $(htmldir).
88  PCRE_POSIXLIB_VERSION=0:0:0  if test "x$htmldir" = 'x${docdir}'
89  PCRE_CPPLIB_VERSION=0:0:0  then
90      htmldir='${docdir}/html'
91    fi
92    
93  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  # Handle --disable-cpp
94  dnl substituted in pcre-config.in.  AC_ARG_ENABLE(cpp,
95                  AS_HELP_STRING([--disable-cpp],
96                                 [disable C++ support]),
97                  , enable_cpp=yes)
98    
99    # Handle --enable-rebuild-chartables
100    AC_ARG_ENABLE(rebuild-chartables,
101                  AS_HELP_STRING([--enable-rebuild-chartables],
102                                 [rebuild character tables in current locale]),
103                  , enable_rebuild_chartables=no)
104    
105  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  # Handle --enable-utf8 (disabled by default)
106  PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  AC_ARG_ENABLE(utf8,
107  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`                AS_HELP_STRING([--enable-utf8],
108  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}                               [enable UTF-8 support (incompatible with --enable-ebcdic)]),
109                  , enable_utf8=unset)
110    
111  dnl Handle --disable-cpp  # Handle --enable-unicode-properties
112    AC_ARG_ENABLE(unicode-properties,
113                  AS_HELP_STRING([--enable-unicode-properties],
114                                 [enable Unicode properties support (implies --enable-utf8)]),
115                  , enable_unicode_properties=no)
116    
117    # Handle --enable-newline=NL
118    dnl AC_ARG_ENABLE(newline,
119    dnl               AS_HELP_STRING([--enable-newline=NL],
120    dnl                              [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
121    dnl               , enable_newline=lf)
122    
123  AC_ARG_ENABLE(cpp,  # Separate newline options
124  [  --disable-cpp           disable C++ support],  ac_pcre_newline=lf
125  want_cpp="$enableval", want_cpp=yes)  AC_ARG_ENABLE(newline-is-cr,
126                  AS_HELP_STRING([--enable-newline-is-cr],
127                                 [use CR as newline character]),
128                  ac_pcre_newline=cr)
129    AC_ARG_ENABLE(newline-is-lf,
130                  AS_HELP_STRING([--enable-newline-is-lf],
131                                 [use LF as newline character (default)]),
132                  ac_pcre_newline=lf)
133    AC_ARG_ENABLE(newline-is-crlf,
134                  AS_HELP_STRING([--enable-newline-is-crlf],
135                                 [use CRLF as newline sequence]),
136                  ac_pcre_newline=crlf)
137    AC_ARG_ENABLE(newline-is-anycrlf,
138                  AS_HELP_STRING([--enable-newline-is-anycrlf],
139                                 [use CR, LF, or CRLF as newline sequence]),
140                  ac_pcre_newline=anycrlf)
141    AC_ARG_ENABLE(newline-is-any,
142                  AS_HELP_STRING([--enable-newline-is-any],
143                                 [use any valid Unicode newline sequence]),
144                  ac_pcre_newline=any)
145    enable_newline="$ac_pcre_newline"
146    
147    # Handle --enable-bsr-anycrlf
148    AC_ARG_ENABLE(bsr-anycrlf,
149                  AS_HELP_STRING([--enable-bsr-anycrlf],
150                                 [\R matches only CR, LF, CRLF by default]),
151                  , enable_bsr_anycrlf=no)
152    
153  dnl Checks for programs.  # Handle --enable-ebcdic
154    AC_ARG_ENABLE(ebcdic,
155                  AS_HELP_STRING([--enable-ebcdic],
156                                 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
157                  , enable_ebcdic=no)
158    
159  AC_PROG_CC  # Handle --disable-stack-for-recursion
160    AC_ARG_ENABLE(stack-for-recursion,
161                  AS_HELP_STRING([--disable-stack-for-recursion],
162                                 [don't use stack recursion when matching]),
163                  , enable_stack_for_recursion=yes)
164    
165    # Handle --enable-pcregrep-libz
166    AC_ARG_ENABLE(pcregrep-libz,
167                  AS_HELP_STRING([--enable-pcregrep-libz],
168                                 [link pcregrep with libz to handle .gz files]),
169                  , enable_pcregrep_libz=no)
170    
171    # Handle --enable-pcregrep-libbz2
172    AC_ARG_ENABLE(pcregrep-libbz2,
173                  AS_HELP_STRING([--enable-pcregrep-libbz2],
174                                 [link pcregrep with libbz2 to handle .bz2 files]),
175                  , enable_pcregrep_libbz2=no)
176    
177    # Handle --enable-pcretest-libreadline
178    AC_ARG_ENABLE(pcretest-libreadline,
179                  AS_HELP_STRING([--enable-pcretest-libreadline],
180                                 [link pcretest with libreadline]),
181                  , enable_pcretest_libreadline=no)
182    
183  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Handle --with-posix-malloc-threshold=NBYTES
184  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  AC_ARG_WITH(posix-malloc-threshold,
185  dnl though that is completely bogus. (This may happen only on certain systems              AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
186  dnl with certain versions of autoconf, of course.) An attempt to include this                             [threshold for POSIX malloc usage (default=10)]),
187  dnl test inside a check for want_cpp was criticized by a libtool expert, who              , with_posix_malloc_threshold=10)
 dnl tells me that it isn't allowed.  
188    
189  AC_PROG_CXX  # Handle --with-link-size=N
190    AC_ARG_WITH(link-size,
191                AS_HELP_STRING([--with-link-size=N],
192                               [internal link size (2, 3, or 4 allowed; default=2)]),
193                , with_link_size=2)
194    
195  dnl The icc compiler has the same options as gcc, so let the rest of the  # Handle --with-match-limit=N
196  dnl configure script think it has gcc when setting up dnl options etc.  AC_ARG_WITH(match-limit,
197  dnl This is a nasty hack which no longer seems necessary with the update              AS_HELP_STRING([--with-match-limit=N],
198  dnl to the latest libtool files, so I have commented it out.                             [default limit on internal looping (default=10000000)]),
199  dnl              , with_match_limit=10000000)
200  dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
201    # Handle --with-match-limit_recursion=N
202    #
203    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
204    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
205    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
206    # different numeric value (or even the same numeric value as MATCH_LIMIT,
207    # though no longer defined in terms of the latter).
208    #
209    AC_ARG_WITH(match-limit-recursion,
210                AS_HELP_STRING([--with-match-limit-recursion=N],
211                               [default limit on internal recursion (default=MATCH_LIMIT)]),
212                , with_match_limit_recursion=MATCH_LIMIT)
213    
214    # Make sure that if enable_unicode_properties was set, that UTF-8 support
215    # is enabled.
216    #
217    if test "x$enable_unicode_properties" = "xyes"
218    then
219      if test "x$enable_utf8" = "xno"
220      then
221        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
222      fi
223      enable_utf8=yes
224    fi
225    
226  AC_PROG_INSTALL  if test "x$enable_utf8" = "xunset"
227  AC_LIBTOOL_WIN32_DLL  then
228  AC_PROG_LIBTOOL    enable_utf8=no
229    fi
230    
231    # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
232    # Also check that UTF-8 support is not requested, because PCRE cannot handle
233    # EBCDIC and UTF-8 in the same build. To do so it would need to use different
234    # character constants depending on the mode.
235    #
236    if test "x$enable_ebcdic" = "xyes"
237    then
238      enable_rebuild_chartables=yes
239      if test "x$enable_utf8" = "xyes"
240      then
241        AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
242      fi
243    fi
244    
245    # Convert the newline identifier into the appropriate integer value.
246    case "$enable_newline" in
247      lf)      ac_pcre_newline_value=10   ;;
248      cr)      ac_pcre_newline_value=13   ;;
249      crlf)    ac_pcre_newline_value=3338 ;;
250      anycrlf) ac_pcre_newline_value=-2   ;;
251      any)     ac_pcre_newline_value=-1   ;;
252      *)
253      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
254      ;;
255    esac
256    
257  dnl We need to find a compiler for compiling a program to run on the local host  # Check argument to --with-link-size
258  dnl while building. It needs to be different from CC when cross-compiling.  case "$with_link_size" in
259  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for    2|3|4) ;;
260  dnl figuring this out automatically. Unfortunately, it does not work with the    *)
261  dnl latest versions of autoconf. So for the moment, we just default to the    AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
262  dnl same values as the "main" compiler. People who are cross-compiling will    ;;
263  dnl just have to adjust the Makefile by hand or set these values when they  esac
 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)'}  
264    
265  dnl Checks for header files.  AH_TOP([
266    /* On Unix-like systems config.h.in is converted by "configure" into config.h.
267    Some other environments also support the use of "configure". PCRE is written in
268    Standard C, but there are a few non-standard things it can cope with, allowing
269    it to run on SunOS4 and other "close to standard" systems.
270    
271    If you are going to build PCRE "by hand" on a system without "configure" you
272    should copy the distributed config.h.generic to config.h, and then set up the
273    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
274    all of your compile commands, so that config.h is included at the start of
275    every source.
276    
277    Alternatively, you can avoid editing by using -D on the compiler command line
278    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
279    
280    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
281    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
282    them both to 0; an emulation function will be used. */])
283    
284    # Checks for header files.
285  AC_HEADER_STDC  AC_HEADER_STDC
286  AC_CHECK_HEADERS(limits.h)  AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
   
 dnl The files below are C++ header files. One person told me (PH) that  
 dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  
 dnl doesn't work. However, this doesn't always seem to be the case.  
287    
288  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # The files below are C++ header files.
289    pcre_have_type_traits="0"
290    pcre_have_bits_type_traits="0"
291    if test "x$enable_cpp" = "xyes" -a -n "$CXX"
292  then  then
293  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
294    
295  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
296  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,
297  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
298    # this in different ways.  Some systems, for instance, can do it via
299    # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
300    OLD_LDFLAGS="$LDFLAGS"
301    for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
302                "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
303      AC_MSG_CHECKING([for alias support in the linker])
304      LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
305      # We try to run the linker with this new ld flag.  If the link fails,
306      # we give up and remove the new flag from LDFLAGS.
307      AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
308                                        class RE { static int no_arg; };
309                                        int RE::no_arg;
310                                      }],
311                                     []),
312                     [AC_MSG_RESULT([yes]);
313                      EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
314                      break;],
315                     AC_MSG_RESULT([no]))
316    done
317    LDFLAGS="$OLD_LDFLAGS"
318    
319    # We could be more clever here, given we're doing AC_SUBST with this
320    # (eg set a var to be the name of the include file we want). But we're not
321    # so it's easy to change back to 'regular' autoconf vars if we needed to.
322  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
323                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
324  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"],
325                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
326  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
327                                  [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  
328    
329  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="#"  
330  fi  fi
331  AC_SUBST(MAYBE_CPP_TARGETS)  # Using AC_SUBST eliminates the need to include config.h in a public .h file
332  AC_SUBST(HAVE_CPP)  AC_SUBST(pcre_have_type_traits)
333    AC_SUBST(pcre_have_bits_type_traits)
334    
335    # Conditional compilation
336    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
337    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
338    
339  dnl Checks for typedefs, structures, and compiler characteristics.  # Checks for typedefs, structures, and compiler characteristics.
340    
341  AC_C_CONST  AC_C_CONST
342  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
343    
344  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  pcre_have_strotolonglong=0
345  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])
346    # If we can't convert a string to a long long, pretend we don't even
347    # have a long long.
348    if test $pcre_have_strotolonglong = "0"; then
349       pcre_have_long_long="0"
350       pcre_have_ulong_long="0"
351    else
352      AC_CHECK_TYPES([long long],
353                     [pcre_have_long_long="1"],
354                     [pcre_have_long_long="0"])
355      AC_CHECK_TYPES([unsigned long long],
356                     [pcre_have_ulong_long="1"],
357                     [pcre_have_ulong_long="0"])
358    fi
359  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
360  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
361    
362  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  
   
 AC_ARG_ENABLE(unicode-properties,  
 [  --enable-unicode-properties  enable Unicode properties support],  
 if test "$enableval" = "yes"; then  
   UCP=-DSUPPORT_UCP  
 fi  
 )  
   
 dnl Handle --enable-newline-is-cr  
363    
364  AC_ARG_ENABLE(newline-is-cr,  AC_CHECK_FUNCS(bcopy memmove strerror)
 [  --enable-newline-is-cr  use CR as the newline character],  
 if test "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=13  
 fi  
 )  
365    
366  dnl Handle --enable-newline-is-lf  # Check for the availability of libz (aka zlib)
367    
368  AC_ARG_ENABLE(newline-is-lf,  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
369  [  --enable-newline-is-lf  use LF as the newline character],  AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
 if test "$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 "$enableval" = "yes"; then  
   NEWLINE=-DNEWLINE=3338  
 fi  
 )  
370    
371  dnl Handle --enable-newline-is-any  # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
372    # as for libz. However, this had the following problem, diagnosed and fixed by
373  AC_ARG_ENABLE(newline-is-any,  # a user:
374  [  --enable-newline-is-any  use any Unicode newline sequence],  #
375  if test "$enableval" = "yes"; then  #   - libbz2 uses the Pascal calling convention (WINAPI) for the functions
376    NEWLINE=-DNEWLINE=-1  #     under Win32.
377  fi  #   - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",
378  )  #     therefore missing the function definition.
379    #   - The compiler thus generates a "C" signature for the test function.
380  dnl Handle --enable-ebcdic  #   - The linker fails to find the "C" function.
381    #   - PCRE fails to configure if asked to do so against libbz2.
382  AC_ARG_ENABLE(ebcdic,  #
383  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],  # Solution:
384  if test "$enableval" = "yes"; then  #
385    EBCDIC=-DEBCDIC=1  #   - Replace the AC_CHECK_LIB test with a custom test.
386  fi  
387  )  AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
388    # Original test
389  dnl Handle --disable-stack-for-recursion  # AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
390    #
391  AC_ARG_ENABLE(stack-for-recursion,  # Custom test follows
392  [  --disable-stack-for-recursion  disable use of stack recursion when matching],  
393  if test "$enableval" = "no"; then  AC_MSG_CHECKING([for libbz2])
394    NO_RECURSE=-DNO_RECURSE  OLD_LIBS="$LIBS"
395  fi  LIBS="$LIBS -lbz2"
396  )  AC_LINK_IFELSE( AC_LANG_PROGRAM([[
397    #ifdef HAVE_BZLIB_H
398    #include <bzlib.h>
399    #endif]],
400    [[return (int)BZ2_bzopen("conftest", "rb");]]),
401    [AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],
402    AC_MSG_RESULT([no]))
403    LIBS="$OLD_LIBS"
404    
405    # Check for the availabiity of libreadline
406    
407    AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
408    AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
409    AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
410    
411  dnl There doesn't seem to be a straightforward way of having parameters  # This facilitates -ansi builds under Linux
412  dnl that set values, other than fudging the --with thing. So that's what  dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
 dnl I've done.  
413    
414  dnl Handle --with-posix-malloc-threshold=n  PCRE_STATIC_CFLAG=""
415    if test "x$enable_shared" = "xno" ; then
416  AC_ARG_WITH(posix-malloc-threshold,    AC_DEFINE([PCRE_STATIC], [1], [
417  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],      Define if linking statically (TODO: make nice with Libtool)])
418    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval    PCRE_STATIC_CFLAG="-DPCRE_STATIC"
419  )  fi
420    AC_SUBST(PCRE_STATIC_CFLAG)
421  dnl Handle --with-link-size=n  
422    # Here is where pcre specific defines are handled
423  AC_ARG_WITH(link-size,  
424  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  if test "$enable_utf8" = "yes"; then
425    LINK_SIZE=-DLINK_SIZE=$withval    AC_DEFINE([SUPPORT_UTF8], [], [
426  )      Define to enable support for the UTF-8 Unicode encoding. This will
427        work even in an EBCDIC environment, but it is incompatible with
428  dnl Handle --with-match-limit=n      the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
429        *or* ASCII/UTF-8, but not both at once.])
430  AC_ARG_WITH(match-limit,  fi
431  [  --with-match-limit=10000000  default limit on internal looping],  
432    MATCH_LIMIT=-DMATCH_LIMIT=$withval  if test "$enable_unicode_properties" = "yes"; then
433  )    AC_DEFINE([SUPPORT_UCP], [], [
434        Define to enable support for Unicode properties])
435  dnl Handle --with-match-limit_recursion=n  fi
436    
437  AC_ARG_WITH(match-limit-recursion,  if test "$enable_stack_for_recursion" = "no"; then
438  [  --with-match-limit-recursion=10000000  default limit on internal recursion],    AC_DEFINE([NO_RECURSE], [], [
439    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval      PCRE uses recursive function calls to handle backtracking while
440  )      matching. This can sometimes be a problem on systems that have
441        stacks of limited size. Define NO_RECURSE to get a version that
442  dnl Unicode character property support implies UTF-8 support      doesn't use recursion in the match() function; instead it creates
443        its own stack by steam using pcre_recurse_malloc() to obtain memory
444  if test "$UCP" != "" ; then      from the heap. For more detail, see the comments and other stuff
445    UTF8=-DSUPPORT_UTF8      just above the match() function. On systems that support it,
446  fi      "configure" can be used to set this in the Makefile
447        (use --disable-stack-for-recursion).])
448    fi
449    
450    if test "$enable_pcregrep_libz" = "yes"; then
451      AC_DEFINE([SUPPORT_LIBZ], [], [
452        Define to allow pcregrep to be linked with libz, so that it is
453        able to handle .gz files.])
454    fi
455    
456    if test "$enable_pcregrep_libbz2" = "yes"; then
457      AC_DEFINE([SUPPORT_LIBBZ2], [], [
458        Define to allow pcregrep to be linked with libbz2, so that it is
459        able to handle .bz2 files.])
460    fi
461    
462    if test "$enable_pcretest_libreadline" = "yes"; then
463      AC_DEFINE([SUPPORT_LIBREADLINE], [], [
464        Define to allow pcretest to be linked with libreadline.])
465    fi
466    
467    AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
468      The value of NEWLINE determines the newline character sequence. On
469      systems that support it, "configure" can be used to override the
470      default, which is 10. The possible values are 10 (LF), 13 (CR),
471      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
472    
473    if test "$enable_bsr_anycrlf" = "yes"; then
474      AC_DEFINE([BSR_ANYCRLF], [], [
475        By default, the \R escape sequence matches any Unicode line ending
476        character or sequence of characters. If BSR_ANYCRLF is defined, this is
477        changed so that backslash-R matches only CR, LF, or CRLF. The build-
478        time default can be overridden by the user of PCRE at runtime. On
479        systems that support it, "configure" can be used to override the
480        default.])
481    fi
482    
483    AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
484      The value of LINK_SIZE determines the number of bytes used to store
485      links as offsets within the compiled regex. The default is 2, which
486      allows for compiled patterns up to 64K long. This covers the vast
487      majority of cases. However, PCRE can also be compiled to use 3 or 4
488      bytes instead. This allows for longer patterns in extreme cases. On
489      systems that support it, "configure" can be used to override this default.])
490    
491    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
492      When calling PCRE via the POSIX interface, additional working storage
493      is required for holding the pointers to capturing substrings because
494      PCRE requires three integers per substring, whereas the POSIX
495      interface provides only two. If the number of expected substrings is
496      small, the wrapper function uses space on the stack, because this is
497      faster than using malloc() for each call. The threshold above which
498      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
499      systems that support it, "configure" can be used to override this
500      default.])
501    
502    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
503      The value of MATCH_LIMIT determines the default number of times the
504      internal match() function can be called during a single execution of
505      pcre_exec(). There is a runtime interface for setting a different
506      limit. The limit exists in order to catch runaway regular
507      expressions that take for ever to determine that they do not match.
508      The default is set very large so that it does not accidentally catch
509      legitimate cases. On systems that support it, "configure" can be
510      used to override this default default.])
511    
512    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
513      The above limit applies to all calls of match(), whether or not they
514      increase the recursion depth. In some environments it is desirable
515      to limit the depth of recursive calls of match() more strictly, in
516      order to restrict the maximum amount of stack (or heap, if
517      NO_RECURSE is defined) that is used. The value of
518      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
519      have any useful effect, it must be less than the value of
520      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
521      There is a runtime method for setting a different limit. On systems
522      that support it, "configure" can be used to override the default.])
523    
524    AC_DEFINE([MAX_NAME_SIZE], [32], [
525      This limit is parameterized just in case anybody ever wants to
526      change it. Care must be taken if it is increased, because it guards
527      against integer overflow caused by enormously large patterns.])
528    
529    AC_DEFINE([MAX_NAME_COUNT], [10000], [
530      This limit is parameterized just in case anybody ever wants to
531      change it. Care must be taken if it is increased, because it guards
532      against integer overflow caused by enormously large patterns.])
533    
534    AH_VERBATIM([PCRE_EXP_DEFN], [
535    /* If you are compiling for a system other than a Unix-like system or
536       Win32, and it needs some magic to be inserted before the definition
537       of a function that is exported by the library, define this macro to
538       contain the relevant magic. If you do not define this macro, it
539       defaults to "extern" for a C compiler and "extern C" for a C++
540       compiler on non-Win32 systems. This macro apears at the start of
541       every exported function that is part of the external API. It does
542       not appear on functions that are "external" in the C sense, but
543       which are internal to the library. */
544    #undef PCRE_EXP_DEFN])
545    
546    if test "$enable_ebcdic" = "yes"; then
547      AC_DEFINE_UNQUOTED([EBCDIC], [], [
548        If you are compiling for a system that uses EBCDIC instead of ASCII
549        character codes, define this macro as 1. On systems that can use
550        "configure", this can be done via --enable-ebcdic. PCRE will then
551        assume that all input strings are in EBCDIC. If you do not define
552        this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
553        It is not possible to build a version of PCRE that supports both
554        EBCDIC and UTF-8.])
555    fi
556    
557    # Platform specific issues
558    NO_UNDEFINED=
559    EXPORT_ALL_SYMBOLS=
560    case $host_os in
561      cygwin* | mingw* )
562        if test X"$enable_shared" = Xyes; then
563          NO_UNDEFINED="-no-undefined"
564          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
565        fi
566        ;;
567    esac
568    
569  dnl "Export" these variables  # The extra LDFLAGS for each particular library
570    # (Note: The libpcre*_version bits are m4 variables, assigned above)
571    
572  AC_SUBST(BUILD_EXEEXT)  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
573  AC_SUBST(BUILD_OBJEXT)                         $NO_UNDEFINED -version-info libpcre_version"
 AC_SUBST(CC_FOR_BUILD)  
 AC_SUBST(CXX_FOR_BUILD)  
 AC_SUBST(CFLAGS_FOR_BUILD)  
 AC_SUBST(CXXFLAGS_FOR_BUILD)  
 AC_SUBST(CXXLDFLAGS)  
 AC_SUBST(EBCDIC)  
 AC_SUBST(HAVE_MEMMOVE)  
 AC_SUBST(HAVE_STRERROR)  
 AC_SUBST(LINK_SIZE)  
 AC_SUBST(MATCH_LIMIT)  
 AC_SUBST(MATCH_LIMIT_RECURSION)  
 AC_SUBST(NEWLINE)  
 AC_SUBST(NO_RECURSE)  
 AC_SUBST(PCRE_LIB_VERSION)  
 AC_SUBST(PCRE_POSIXLIB_VERSION)  
 AC_SUBST(PCRE_CPPLIB_VERSION)  
 AC_SUBST(PCRE_VERSION)  
 AC_SUBST(POSIX_MALLOC_THRESHOLD)  
 AC_SUBST(UCP)  
 AC_SUBST(UTF8)  
574    
575  dnl Stuff to make MinGW work better. Special treatment is no longer  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
576  dnl needed for Cygwin.                              $NO_UNDEFINED -version-info libpcreposix_version"
577    
578  case $host_os in  EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
579  mingw* )                            $NO_UNDEFINED -version-info libpcrecpp_version \
580      POSIX_OBJ=pcreposix.o                            $EXPORT_ALL_SYMBOLS"
581      POSIX_LOBJ=pcreposix.lo  
582      POSIX_LIB=  AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
583      ON_WINDOWS=  AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
584      NOT_ON_WINDOWS="#"  AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
585      WIN_PREFIX=  
586      ;;  # When we run 'make distcheck', use these arguments.
587  * )  DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
588      ON_WINDOWS="#"  AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
589      NOT_ON_WINDOWS=  
590      POSIX_OBJ=  # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
591      POSIX_LOBJ=  # specified, the relevant library is available.
592      POSIX_LIB=libpcreposix.la  
593      WIN_PREFIX=  if test "$enable_pcregrep_libz" = "yes"; then
594      ;;    if test "$HAVE_ZLIB_H" != "1"; then
595  esac      echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
596  AC_SUBST(WIN_PREFIX)      exit 1
597  AC_SUBST(ON_WINDOWS)    fi
598  AC_SUBST(NOT_ON_WINDOWS)    if test "$HAVE_LIBZ" != "1"; then
599  AC_SUBST(POSIX_OBJ)      echo "** Cannot --enable-pcregrep-libz because libz was not found"
600  AC_SUBST(POSIX_LOBJ)      exit 1
601  AC_SUBST(POSIX_LIB)    fi
602      LIBZ="-lz"
603    fi
604    AC_SUBST(LIBZ)
605    
606    if test "$enable_pcregrep_libbz2" = "yes"; then
607      if test "$HAVE_BZLIB_H" != "1"; then
608        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
609        exit 1
610      fi
611      if test "$HAVE_LIBBZ2" != "1"; then
612        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
613        exit 1
614      fi
615      LIBBZ2="-lbz2"
616    fi
617    AC_SUBST(LIBBZ2)
618    
619    # Similarly for --enable-pcretest-readline
620    
621    if test "$enable_pcretest_libreadline" = "yes"; then
622      if test "$HAVE_READLINE_H" != "1"; then
623        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
624        exit 1
625      fi
626      if test "$HAVE_HISTORY_H" != "1"; then
627        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
628        exit 1
629      fi
630      LIBREADLINE="-lreadline"
631    fi
632    AC_SUBST(LIBREADLINE)
633    
634    # Produce these files, in addition to config.h.
635    AC_CONFIG_FILES(
636            Makefile
637            libpcre.pc
638            libpcreposix.pc
639            libpcrecpp.pc
640            pcre-config
641            pcre.h
642            pcre_stringpiece.h
643            pcrecpparg.h
644    )
645    
646    # Make the generated script files executable.
647    AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
648    
649    # Make sure that pcre_chartables.c is removed in case the method for
650    # creating it was changed by reconfiguration.
651    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
652    
653    AC_OUTPUT
654    
655    # Print out a nice little message after configure is run displaying your
656    # chosen options.
657    
658    cat <<EOF
659    
660    $PACKAGE-$VERSION configuration summary:
661    
662        Install prefix .................. : ${prefix}
663        C preprocessor .................. : ${CPP}
664        C compiler ...................... : ${CC}
665        C++ preprocessor ................ : ${CXXCPP}
666        C++ compiler .................... : ${CXX}
667        Linker .......................... : ${LD}
668        C preprocessor flags ............ : ${CPPFLAGS}
669        C compiler flags ................ : ${CFLAGS}
670        C++ compiler flags .............. : ${CXXFLAGS}
671        Linker flags .................... : ${LDFLAGS}
672        Extra libraries ................. : ${LIBS}
673    
674        Build C++ library ............... : ${enable_cpp}
675        Enable UTF-8 support ............ : ${enable_utf8}
676        Unicode properties .............. : ${enable_unicode_properties}
677        Newline char/sequence ........... : ${enable_newline}
678        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
679        EBCDIC coding ................... : ${enable_ebcdic}
680        Rebuild char tables ............. : ${enable_rebuild_chartables}
681        Use stack recursion ............. : ${enable_stack_for_recursion}
682        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
683        Internal link size .............. : ${with_link_size}
684        Match limit ..................... : ${with_match_limit}
685        Match limit recursion ........... : ${with_match_limit_recursion}
686        Build shared libs ............... : ${enable_shared}
687        Build static libs ............... : ${enable_static}
688        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
689        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
690        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
691    
692  if test "x$enable_shared" = "xno" ; then  EOF
     AC_DEFINE([PCRE_STATIC],[1],[to link statically])  
 fi  
693    
694  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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