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revision 91 by nigel, Sat Feb 24 21:41:34 2007 UTC revision 581 by ph10, Fri Dec 10 11:40:00 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 minor version numbers 08 or 09 because
4  dnl patches that various people have sent to me (PH). Sometimes the information  dnl the leading zeros may cause them to be treated as invalid octal constants
5  dnl I get is contradictory. I've tried to put in comments that explain things,  dnl if a PCRE user writes code that uses PCRE_MINOR as a number. There is now
6  dnl but in some cases the information is second-hand and I have no way of  dnl a check further down that throws an error if 08 or 09 are used.
7  dnl verifying it. I am not an autoconf or libtool expert!  
8    dnl The PCRE_PRERELEASE feature is for identifying release candidates. It might
9  dnl This is required at the start; the name is the name of a file  dnl be defined as -RC2, for example. For real releases, it should be empty.
10  dnl it should be seeing, to verify it is in the same directory.  
11    m4_define(pcre_major, [8])
12  AC_INIT(dftables.c)  m4_define(pcre_minor, [11])
13  AC_CONFIG_SRCDIR([pcre.h])  m4_define(pcre_prerelease, [])
14    m4_define(pcre_date, [2010-12-10])
15  dnl A safety precaution  
16    # Libtool shared library interface versions (current:revision:age)
17    m4_define(libpcre_version, [0:1:0])
18    m4_define(libpcreposix_version, [0:0:0])
19    m4_define(libpcrecpp_version, [0:0:0])
20    
21  AC_PREREQ(2.57)  AC_PREREQ(2.57)
22    AC_INIT(PCRE, pcre_major.pcre_minor[]pcre_prerelease, , pcre)
23    AC_CONFIG_SRCDIR([pcre.h.in])
24    AM_INIT_AUTOMAKE([dist-bzip2 dist-zip])
25    AC_CONFIG_HEADERS(config.h)
26    
27    # This was added at the suggestion of libtoolize (03-Jan-10)
28    AC_CONFIG_MACRO_DIR([m4])
29    
30    # The default CFLAGS and CXXFLAGS in Autoconf are "-g -O2" for gcc and just
31    # "-g" for any other compiler. There doesn't seem to be a standard way of
32    # getting rid of the -g (which I don't think is needed for a production
33    # library). This fudge seems to achieve the necessary. First, we remember the
34    # externally set values of CFLAGS and CXXFLAGS. Then call the AC_PROG_CC and
35    # AC_PROG_CXX macros to find the compilers - if CFLAGS and CXXFLAGS are not
36    # set, they will be set to Autoconf's defaults. Afterwards, if the original
37    # values were not set, remove the -g from the Autoconf defaults.
38    # (PH 02-May-07)
39    
40  dnl Arrange to build config.h from config.h.in.  remember_set_CFLAGS="$CFLAGS"
41  dnl Manual says this macro should come right after AC_INIT.  remember_set_CXXFLAGS="$CXXFLAGS"
 AC_CONFIG_HEADER(config.h)  
   
 dnl Default values for miscellaneous macros  
   
 POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  
   
 dnl Provide versioning information for libtool shared libraries that  
 dnl are built by default on Unix systems.  
   
 PCRE_LIB_VERSION=0:1:0  
 PCRE_POSIXLIB_VERSION=0:0:0  
 PCRE_CPPLIB_VERSION=0:0:0  
   
 dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  
 dnl substituted in pcre-config.in.  
   
 PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  
 PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  
 PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`  
 PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}  
   
 dnl Handle --disable-cpp  
   
 AC_ARG_ENABLE(cpp,  
 [  --disable-cpp           disable C++ support],  
 want_cpp="$enableval", want_cpp=yes)  
   
 dnl Checks for programs.  
42    
43  AC_PROG_CC  AC_PROG_CC
44    AC_PROG_CXX
45    
46  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  if test "x$remember_set_CFLAGS" = "x"
47  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  then
48  dnl though that is completely bogus. (This may happen only on certain systems    if test "$CFLAGS" = "-g -O2"
49  dnl with certain versions of autoconf, of course.) An attempt to include this    then
50  dnl test inside a check for want_cpp was criticized by a libtool expert, who      CFLAGS="-O2"
51  dnl tells me that it isn't allowed.    elif test "$CFLAGS" = "-g"
52      then
53        CFLAGS=""
54      fi
55    fi
56    
57  AC_PROG_CXX  if test "x$remember_set_CXXFLAGS" = "x"
58    then
59      if test "$CXXFLAGS" = "-g -O2"
60      then
61        CXXFLAGS="-O2"
62      elif test "$CXXFLAGS" = "-g"
63      then
64        CXXFLAGS=""
65      fi
66    fi
67    
68    # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
69    # Check for that case, and just disable c++ code if g++ doesn't run.
70    AC_LANG_PUSH(C++)
71    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
72    AC_LANG_POP
73    
74  dnl The icc compiler has the same options as gcc, so let the rest of the  # Check for a 64-bit integer type
75  dnl configure script think it has gcc when setting up dnl options etc.  AC_TYPE_INT64_T
 dnl This is a nasty hack which no longer seems necessary with the update  
 dnl to the latest libtool files, so I have commented it out.  
 dnl  
 dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
76    
77  AC_PROG_INSTALL  AC_PROG_INSTALL
78  AC_LIBTOOL_WIN32_DLL  AC_LIBTOOL_WIN32_DLL
79  AC_PROG_LIBTOOL  AC_PROG_LIBTOOL
80    AC_PROG_LN_S
81    
82  dnl We need to find a compiler for compiling a program to run on the local host  PCRE_MAJOR="pcre_major"
83  dnl while building. It needs to be different from CC when cross-compiling.  PCRE_MINOR="pcre_minor"
84  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for  PCRE_PRERELEASE="pcre_prerelease"
85  dnl figuring this out automatically. Unfortunately, it does not work with the  PCRE_DATE="pcre_date"
 dnl latest versions of autoconf. So for the moment, we just default to the  
 dnl same values as the "main" compiler. People who are cross-compiling will  
 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)'}  
   
 dnl Checks for header files.  
   
 AC_HEADER_STDC  
 AC_CHECK_HEADERS(limits.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.  
86    
87  if test "x$want_cpp" = "xyes" -a -n "$CXX"  if test "$PCRE_MINOR" = "08" -o "$PCRE_MINOR" = "09"
88  then  then
89  AC_LANG_SAVE    echo "***"
90  AC_LANG_CPLUSPLUS    echo "*** Minor version number $PCRE_MINOR must not be used. ***"
91      echo "*** Use only 01 to 07 or 10 onwards, to avoid octal issues. ***"
92  dnl We could be more clever here, given we're doing AC_SUBST with this    echo "***"
93  dnl (eg set a var to be the name of the include file we want).  But we're not    exit 1
 dnl so it's easy to change back to 'regular' autoconf vars if we needed to.  
 AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  
                          [pcre_have_cpp_headers="0"])  
 AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],  
                                      [pcre_have_bits_type_traits="0"])  
 AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  
                                 [pcre_have_type_traits="0"])  
 dnl Using AC_SUBST eliminates the need to include config.h in a public .h file  
 AC_SUBST(pcre_have_bits_type_traits)  
 AC_SUBST(pcre_have_type_traits)  
 AC_LANG_RESTORE  
94  fi  fi
95    
96  dnl From the above, we now have enough info to know if C++ is fully installed  AC_SUBST(PCRE_MAJOR)
97  if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then  AC_SUBST(PCRE_MINOR)
98    MAYBE_CPP_TARGETS='$(CPP_TARGETS)'  AC_SUBST(PCRE_PRERELEASE)
99    HAVE_CPP=  AC_SUBST(PCRE_DATE)
100  else  
101    MAYBE_CPP_TARGETS=  # Set a more sensible default value for $(htmldir).
102    HAVE_CPP="#"  if test "x$htmldir" = 'x${docdir}'
103    then
104      htmldir='${docdir}/html'
105  fi  fi
 AC_SUBST(MAYBE_CPP_TARGETS)  
 AC_SUBST(HAVE_CPP)  
106    
107  dnl Checks for typedefs, structures, and compiler characteristics.  # Handle --disable-cpp. The substitution of enable_cpp is needed for use in
108    # pcre-config.
109    AC_ARG_ENABLE(cpp,
110                  AS_HELP_STRING([--disable-cpp],
111                                 [disable C++ support]),
112                  , enable_cpp=yes)
113    AC_SUBST(enable_cpp)
114    
115    # Handle --enable-rebuild-chartables
116    AC_ARG_ENABLE(rebuild-chartables,
117                  AS_HELP_STRING([--enable-rebuild-chartables],
118                                 [rebuild character tables in current locale]),
119                  , enable_rebuild_chartables=no)
120    
121  AC_C_CONST  # Handle --enable-utf8 (disabled by default)
122  AC_TYPE_SIZE_T  AC_ARG_ENABLE(utf8,
123                  AS_HELP_STRING([--enable-utf8],
124                                 [enable UTF-8 support (incompatible with --enable-ebcdic)]),
125                  , enable_utf8=unset)
126    
127  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  # Handle --enable-unicode-properties
128  AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])  AC_ARG_ENABLE(unicode-properties,
129  AC_SUBST(pcre_have_long_long)                AS_HELP_STRING([--enable-unicode-properties],
130  AC_SUBST(pcre_have_ulong_long)                               [enable Unicode properties support (implies --enable-utf8)]),
131                  , enable_unicode_properties=no)
132    
133    # Handle --enable-newline=NL
134    dnl AC_ARG_ENABLE(newline,
135    dnl               AS_HELP_STRING([--enable-newline=NL],
136    dnl                              [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
137    dnl               , enable_newline=lf)
138    
139  dnl Checks for library functions.  # Separate newline options
140    ac_pcre_newline=lf
141    AC_ARG_ENABLE(newline-is-cr,
142                  AS_HELP_STRING([--enable-newline-is-cr],
143                                 [use CR as newline character]),
144                  ac_pcre_newline=cr)
145    AC_ARG_ENABLE(newline-is-lf,
146                  AS_HELP_STRING([--enable-newline-is-lf],
147                                 [use LF as newline character (default)]),
148                  ac_pcre_newline=lf)
149    AC_ARG_ENABLE(newline-is-crlf,
150                  AS_HELP_STRING([--enable-newline-is-crlf],
151                                 [use CRLF as newline sequence]),
152                  ac_pcre_newline=crlf)
153    AC_ARG_ENABLE(newline-is-anycrlf,
154                  AS_HELP_STRING([--enable-newline-is-anycrlf],
155                                 [use CR, LF, or CRLF as newline sequence]),
156                  ac_pcre_newline=anycrlf)
157    AC_ARG_ENABLE(newline-is-any,
158                  AS_HELP_STRING([--enable-newline-is-any],
159                                 [use any valid Unicode newline sequence]),
160                  ac_pcre_newline=any)
161    enable_newline="$ac_pcre_newline"
162    
163    # Handle --enable-bsr-anycrlf
164    AC_ARG_ENABLE(bsr-anycrlf,
165                  AS_HELP_STRING([--enable-bsr-anycrlf],
166                                 [\R matches only CR, LF, CRLF by default]),
167                  , enable_bsr_anycrlf=no)
168    
169  AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  # Handle --enable-ebcdic
170    AC_ARG_ENABLE(ebcdic,
171                  AS_HELP_STRING([--enable-ebcdic],
172                                 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
173                  , enable_ebcdic=no)
174    
175  dnl Handle --enable-utf8  # Handle --disable-stack-for-recursion
176    AC_ARG_ENABLE(stack-for-recursion,
177                  AS_HELP_STRING([--disable-stack-for-recursion],
178                                 [don't use stack recursion when matching]),
179                  , enable_stack_for_recursion=yes)
180    
181    # Handle --enable-pcregrep-libz
182    AC_ARG_ENABLE(pcregrep-libz,
183                  AS_HELP_STRING([--enable-pcregrep-libz],
184                                 [link pcregrep with libz to handle .gz files]),
185                  , enable_pcregrep_libz=no)
186    
187    # Handle --enable-pcregrep-libbz2
188    AC_ARG_ENABLE(pcregrep-libbz2,
189                  AS_HELP_STRING([--enable-pcregrep-libbz2],
190                                 [link pcregrep with libbz2 to handle .bz2 files]),
191                  , enable_pcregrep_libbz2=no)
192    
193    # Handle --enable-pcretest-libreadline
194    AC_ARG_ENABLE(pcretest-libreadline,
195                  AS_HELP_STRING([--enable-pcretest-libreadline],
196                                 [link pcretest with libreadline]),
197                  , enable_pcretest_libreadline=no)
198    
199  AC_ARG_ENABLE(utf8,  # Handle --with-posix-malloc-threshold=NBYTES
200  [  --enable-utf8           enable UTF8 support],  AC_ARG_WITH(posix-malloc-threshold,
201  if test "$enableval" = "yes"; then              AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
202    UTF8=-DSUPPORT_UTF8                             [threshold for POSIX malloc usage (default=10)]),
203  fi              , with_posix_malloc_threshold=10)
 )  
204    
205  dnl Handle --enable-unicode-properties  # Handle --with-link-size=N
206    AC_ARG_WITH(link-size,
207                AS_HELP_STRING([--with-link-size=N],
208                               [internal link size (2, 3, or 4 allowed; default=2)]),
209                , with_link_size=2)
210    
211  AC_ARG_ENABLE(unicode-properties,  # Handle --with-match-limit=N
212  [  --enable-unicode-properties  enable Unicode properties support],  AC_ARG_WITH(match-limit,
213  if test "$enableval" = "yes"; then              AS_HELP_STRING([--with-match-limit=N],
214    UCP=-DSUPPORT_UCP                             [default limit on internal looping (default=10000000)]),
215                , with_match_limit=10000000)
216    
217    # Handle --with-match-limit_recursion=N
218    #
219    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
220    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
221    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
222    # different numeric value (or even the same numeric value as MATCH_LIMIT,
223    # though no longer defined in terms of the latter).
224    #
225    AC_ARG_WITH(match-limit-recursion,
226                AS_HELP_STRING([--with-match-limit-recursion=N],
227                               [default limit on internal recursion (default=MATCH_LIMIT)]),
228                , with_match_limit_recursion=MATCH_LIMIT)
229    
230    # Make sure that if enable_unicode_properties was set, that UTF-8 support
231    # is enabled.
232    #
233    if test "x$enable_unicode_properties" = "xyes"
234    then
235      if test "x$enable_utf8" = "xno"
236      then
237        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
238      fi
239      enable_utf8=yes
240  fi  fi
 )  
   
 dnl Handle --enable-newline-is-cr  
241    
242  AC_ARG_ENABLE(newline-is-cr,  if test "x$enable_utf8" = "xunset"
243  [  --enable-newline-is-cr  use CR as the newline character],  then
244  if test "$enableval" = "yes"; then    enable_utf8=no
   NEWLINE=-DNEWLINE=13  
245  fi  fi
 )  
   
 dnl Handle --enable-newline-is-lf  
246    
247  AC_ARG_ENABLE(newline-is-lf,  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
248  [  --enable-newline-is-lf  use LF as the newline character],  # Also check that UTF-8 support is not requested, because PCRE cannot handle
249  if test "$enableval" = "yes"; then  # EBCDIC and UTF-8 in the same build. To do so it would need to use different
250    NEWLINE=-DNEWLINE=10  # character constants depending on the mode.
251  fi  #
252  )  if test "x$enable_ebcdic" = "xyes"
253    then
254      enable_rebuild_chartables=yes
255      if test "x$enable_utf8" = "xyes"
256      then
257        AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
258      fi
259    fi
260    
261    # Convert the newline identifier into the appropriate integer value.
262    case "$enable_newline" in
263      lf)      ac_pcre_newline_value=10   ;;
264      cr)      ac_pcre_newline_value=13   ;;
265      crlf)    ac_pcre_newline_value=3338 ;;
266      anycrlf) ac_pcre_newline_value=-2   ;;
267      any)     ac_pcre_newline_value=-1   ;;
268      *)
269      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
270      ;;
271    esac
272    
273  dnl Handle --enable-newline-is-crlf  # Check argument to --with-link-size
274    case "$with_link_size" in
275      2|3|4) ;;
276      *)
277      AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
278      ;;
279    esac
280    
281  AC_ARG_ENABLE(newline-is-crlf,  AH_TOP([
282  [  --enable-newline-is-crlf  use CRLF as the newline sequence],  /* On Unix-like systems config.h.in is converted by "configure" into config.h.
283  if test "$enableval" = "yes"; then  Some other environments also support the use of "configure". PCRE is written in
284    NEWLINE=-DNEWLINE=3338  Standard C, but there are a few non-standard things it can cope with, allowing
285  fi  it to run on SunOS4 and other "close to standard" systems.
286  )  
287    If you are going to build PCRE "by hand" on a system without "configure" you
288    should copy the distributed config.h.generic to config.h, and then set up the
289    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
290    all of your compile commands, so that config.h is included at the start of
291    every source.
292    
293    Alternatively, you can avoid editing by using -D on the compiler command line
294    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
295    
296    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
297    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
298    them both to 0; an emulation function will be used. */])
299    
300  dnl Handle --enable-ebcdic  # Checks for header files.
301    AC_HEADER_STDC
302    AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
303    
304  AC_ARG_ENABLE(ebcdic,  # The files below are C++ header files.
305  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],  pcre_have_type_traits="0"
306  if test "$enableval" == "yes"; then  pcre_have_bits_type_traits="0"
307    EBCDIC=-DEBCDIC=1  if test "x$enable_cpp" = "xyes" -a -n "$CXX"
308  fi  then
309  )  AC_LANG_PUSH(C++)
310    
311  dnl Handle --disable-stack-for-recursion  # Older versions of pcre defined pcrecpp::no_arg, but in new versions
312    # it's called pcrecpp::RE::no_arg.  For backwards ABI compatibility,
313    # we want to make one an alias for the other.  Different systems do
314    # this in different ways.  Some systems, for instance, can do it via
315    # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
316    OLD_LDFLAGS="$LDFLAGS"
317    for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
318                "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
319      AC_MSG_CHECKING([for alias support in the linker])
320      LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
321      # We try to run the linker with this new ld flag.  If the link fails,
322      # we give up and remove the new flag from LDFLAGS.
323      AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
324                                        class RE { static int no_arg; };
325                                        int RE::no_arg;
326                                      }],
327                                     []),
328                     [AC_MSG_RESULT([yes]);
329                      EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
330                      break;],
331                     AC_MSG_RESULT([no]))
332    done
333    LDFLAGS="$OLD_LDFLAGS"
334    
335    # We could be more clever here, given we're doing AC_SUBST with this
336    # (eg set a var to be the name of the include file we want). But we're not
337    # so it's easy to change back to 'regular' autoconf vars if we needed to.
338    AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
339                             [pcre_have_cpp_headers="0"])
340    AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
341                                         [pcre_have_bits_type_traits="0"])
342    AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
343                                    [pcre_have_type_traits="0"])
344    
345  AC_ARG_ENABLE(stack-for-recursion,  # (This isn't c++-specific, but is only used in pcrecpp.cc, so try this
346  [  --disable-stack-for-recursion  disable use of stack recursion when matching],  # in a c++ context.  This matters becuase strtoimax is C99 and may not
347  if test "$enableval" = "no"; then  # be supported by the C++ compiler.)
348    NO_RECURSE=-DNO_RECURSE  # Figure out how to create a longlong from a string: strtoll and
349    # equiv.  It's not enough to call AC_CHECK_FUNCS: hpux has a
350    # strtoll, for instance, but it only takes 2 args instead of 3!
351    # We have to call AH_TEMPLATE since AC_DEFINE_UNQUOTED below is complex.
352    AH_TEMPLATE(HAVE_STRTOQ, [Define to 1 if you have `strtoq'.])
353    AH_TEMPLATE(HAVE_STRTOLL, [Define to 1 if you have `strtoll'.])
354    AH_TEMPLATE(HAVE__STRTOI64, [Define to 1 if you have `_strtoi64'.])
355    AH_TEMPLATE(HAVE_STRTOIMAX, [Define to 1 if you have `strtoimax'.])
356    have_strto_fn=0
357    for fn in strtoq strtoll _strtoi64 strtoimax; do
358      AC_MSG_CHECKING([for $fn])
359      if test "$fn" = strtoimax; then
360        include=stdint.h
361      else
362        include=stdlib.h
363      fi
364      AC_COMPILE_IFELSE(AC_LANG_PROGRAM([#include <$include>],
365                                        [char* e; return $fn("100", &e, 10)]),
366                        [AC_MSG_RESULT(yes)
367                         AC_DEFINE_UNQUOTED(HAVE_`echo $fn | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`, 1,
368                                            [Define to 1 if you have `$fn'.])
369                         have_strto_fn=1
370                         break],
371                        [AC_MSG_RESULT(no)])
372    done
373    
374    if test "$have_strto_fn" = 1; then
375      AC_CHECK_TYPES([long long],
376                     [pcre_have_long_long="1"],
377                     [pcre_have_long_long="0"])
378      AC_CHECK_TYPES([unsigned long long],
379                     [pcre_have_ulong_long="1"],
380                     [pcre_have_ulong_long="0"])
381    else
382      pcre_have_long_long="0"
383      pcre_have_ulong_long="0"
384  fi  fi
385  )  AC_SUBST(pcre_have_long_long)
386    AC_SUBST(pcre_have_ulong_long)
387    
388  dnl There doesn't seem to be a straightforward way of having parameters  AC_LANG_POP
389  dnl that set values, other than fudging the --with thing. So that's what  fi
390  dnl I've done.  # Using AC_SUBST eliminates the need to include config.h in a public .h file
391    AC_SUBST(pcre_have_type_traits)
392    AC_SUBST(pcre_have_bits_type_traits)
393    
394  dnl Handle --with-posix-malloc-threshold=n  # Conditional compilation
395    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
396    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
397    
398  AC_ARG_WITH(posix-malloc-threshold,  # Checks for typedefs, structures, and compiler characteristics.
 [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],  
   POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval  
 )  
399    
400  dnl Handle --with-link-size=n  AC_C_CONST
401    AC_TYPE_SIZE_T
402    
403  AC_ARG_WITH(link-size,  # Checks for library functions.
 [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  
   LINK_SIZE=-DLINK_SIZE=$withval  
 )  
404    
405  dnl Handle --with-match-limit=n  AC_CHECK_FUNCS(bcopy memmove strerror)
406    
407  AC_ARG_WITH(match-limit,  # Check for the availability of libz (aka zlib)
 [  --with-match-limit=10000000  default limit on internal looping],  
   MATCH_LIMIT=-DMATCH_LIMIT=$withval  
 )  
408    
409  dnl Handle --with-match-limit_recursion=n  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
410    AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
411    
412  AC_ARG_WITH(match-limit-recursion,  # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
413  [  --with-match-limit-recursion=10000000  default limit on internal recursion],  # as for libz. However, this had the following problem, diagnosed and fixed by
414    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval  # a user:
415  )  #
416    #   - libbz2 uses the Pascal calling convention (WINAPI) for the functions
417    #     under Win32.
418    #   - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",
419    #     therefore missing the function definition.
420    #   - The compiler thus generates a "C" signature for the test function.
421    #   - The linker fails to find the "C" function.
422    #   - PCRE fails to configure if asked to do so against libbz2.
423    #
424    # Solution:
425    #
426    #   - Replace the AC_CHECK_LIB test with a custom test.
427    
428    AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
429    # Original test
430    # AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
431    #
432    # Custom test follows
433    
434    AC_MSG_CHECKING([for libbz2])
435    OLD_LIBS="$LIBS"
436    LIBS="$LIBS -lbz2"
437    AC_LINK_IFELSE( AC_LANG_PROGRAM([[
438    #ifdef HAVE_BZLIB_H
439    #include <bzlib.h>
440    #endif]],
441    [[return (int)BZ2_bzopen("conftest", "rb");]]),
442    [AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],
443    AC_MSG_RESULT([no]))
444    LIBS="$OLD_LIBS"
445    
446    # Check for the availabiity of libreadline
447    
448    AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
449    AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
450    AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
451    
452  dnl Unicode character property support implies UTF-8 support  # This facilitates -ansi builds under Linux
453    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
454    
455  if test "$UCP" != "" ; then  PCRE_STATIC_CFLAG=""
456    UTF8=-DSUPPORT_UTF8  if test "x$enable_shared" = "xno" ; then
457  fi    AC_DEFINE([PCRE_STATIC], [1], [
458        Define if linking statically (TODO: make nice with Libtool)])
459      PCRE_STATIC_CFLAG="-DPCRE_STATIC"
460    fi
461    AC_SUBST(PCRE_STATIC_CFLAG)
462    
463    # Here is where pcre specific defines are handled
464    
465    if test "$enable_utf8" = "yes"; then
466      AC_DEFINE([SUPPORT_UTF8], [], [
467        Define to enable support for the UTF-8 Unicode encoding. This will
468        work even in an EBCDIC environment, but it is incompatible with
469        the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
470        *or* ASCII/UTF-8, but not both at once.])
471    fi
472    
473    if test "$enable_unicode_properties" = "yes"; then
474      AC_DEFINE([SUPPORT_UCP], [], [
475        Define to enable support for Unicode properties])
476    fi
477    
478    if test "$enable_stack_for_recursion" = "no"; then
479      AC_DEFINE([NO_RECURSE], [], [
480        PCRE uses recursive function calls to handle backtracking while
481        matching. This can sometimes be a problem on systems that have
482        stacks of limited size. Define NO_RECURSE to get a version that
483        doesn't use recursion in the match() function; instead it creates
484        its own stack by steam using pcre_recurse_malloc() to obtain memory
485        from the heap. For more detail, see the comments and other stuff
486        just above the match() function. On systems that support it,
487        "configure" can be used to set this in the Makefile
488        (use --disable-stack-for-recursion).])
489    fi
490    
491    if test "$enable_pcregrep_libz" = "yes"; then
492      AC_DEFINE([SUPPORT_LIBZ], [], [
493        Define to allow pcregrep to be linked with libz, so that it is
494        able to handle .gz files.])
495    fi
496    
497    if test "$enable_pcregrep_libbz2" = "yes"; then
498      AC_DEFINE([SUPPORT_LIBBZ2], [], [
499        Define to allow pcregrep to be linked with libbz2, so that it is
500        able to handle .bz2 files.])
501    fi
502    
503    if test "$enable_pcretest_libreadline" = "yes"; then
504      AC_DEFINE([SUPPORT_LIBREADLINE], [], [
505        Define to allow pcretest to be linked with libreadline.])
506    fi
507    
508    AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
509      The value of NEWLINE determines the newline character sequence. On
510      systems that support it, "configure" can be used to override the
511      default, which is 10. The possible values are 10 (LF), 13 (CR),
512      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
513    
514    if test "$enable_bsr_anycrlf" = "yes"; then
515      AC_DEFINE([BSR_ANYCRLF], [], [
516        By default, the \R escape sequence matches any Unicode line ending
517        character or sequence of characters. If BSR_ANYCRLF is defined, this is
518        changed so that backslash-R matches only CR, LF, or CRLF. The build-
519        time default can be overridden by the user of PCRE at runtime. On
520        systems that support it, "configure" can be used to override the
521        default.])
522    fi
523    
524    AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
525      The value of LINK_SIZE determines the number of bytes used to store
526      links as offsets within the compiled regex. The default is 2, which
527      allows for compiled patterns up to 64K long. This covers the vast
528      majority of cases. However, PCRE can also be compiled to use 3 or 4
529      bytes instead. This allows for longer patterns in extreme cases. On
530      systems that support it, "configure" can be used to override this default.])
531    
532    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
533      When calling PCRE via the POSIX interface, additional working storage
534      is required for holding the pointers to capturing substrings because
535      PCRE requires three integers per substring, whereas the POSIX
536      interface provides only two. If the number of expected substrings is
537      small, the wrapper function uses space on the stack, because this is
538      faster than using malloc() for each call. The threshold above which
539      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
540      systems that support it, "configure" can be used to override this
541      default.])
542    
543    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
544      The value of MATCH_LIMIT determines the default number of times the
545      internal match() function can be called during a single execution of
546      pcre_exec(). There is a runtime interface for setting a different
547      limit. The limit exists in order to catch runaway regular
548      expressions that take for ever to determine that they do not match.
549      The default is set very large so that it does not accidentally catch
550      legitimate cases. On systems that support it, "configure" can be
551      used to override this default default.])
552    
553    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
554      The above limit applies to all calls of match(), whether or not they
555      increase the recursion depth. In some environments it is desirable
556      to limit the depth of recursive calls of match() more strictly, in
557      order to restrict the maximum amount of stack (or heap, if
558      NO_RECURSE is defined) that is used. The value of
559      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
560      have any useful effect, it must be less than the value of
561      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
562      There is a runtime method for setting a different limit. On systems
563      that support it, "configure" can be used to override the default.])
564    
565    AC_DEFINE([MAX_NAME_SIZE], [32], [
566      This limit is parameterized just in case anybody ever wants to
567      change it. Care must be taken if it is increased, because it guards
568      against integer overflow caused by enormously large patterns.])
569    
570    AC_DEFINE([MAX_NAME_COUNT], [10000], [
571      This limit is parameterized just in case anybody ever wants to
572      change it. Care must be taken if it is increased, because it guards
573      against integer overflow caused by enormously large patterns.])
574    
575    AH_VERBATIM([PCRE_EXP_DEFN], [
576    /* If you are compiling for a system other than a Unix-like system or
577       Win32, and it needs some magic to be inserted before the definition
578       of a function that is exported by the library, define this macro to
579       contain the relevant magic. If you do not define this macro, it
580       defaults to "extern" for a C compiler and "extern C" for a C++
581       compiler on non-Win32 systems. This macro apears at the start of
582       every exported function that is part of the external API. It does
583       not appear on functions that are "external" in the C sense, but
584       which are internal to the library. */
585    #undef PCRE_EXP_DEFN])
586    
587    if test "$enable_ebcdic" = "yes"; then
588      AC_DEFINE_UNQUOTED([EBCDIC], [], [
589        If you are compiling for a system that uses EBCDIC instead of ASCII
590        character codes, define this macro as 1. On systems that can use
591        "configure", this can be done via --enable-ebcdic. PCRE will then
592        assume that all input strings are in EBCDIC. If you do not define
593        this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
594        It is not possible to build a version of PCRE that supports both
595        EBCDIC and UTF-8.])
596    fi
597    
598    # Platform specific issues
599    NO_UNDEFINED=
600    EXPORT_ALL_SYMBOLS=
601    case $host_os in
602      cygwin* | mingw* )
603        if test X"$enable_shared" = Xyes; then
604          NO_UNDEFINED="-no-undefined"
605          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
606        fi
607        ;;
608    esac
609    
610  dnl "Export" these variables  # The extra LDFLAGS for each particular library
611    # (Note: The libpcre*_version bits are m4 variables, assigned above)
612    
613  AC_SUBST(BUILD_EXEEXT)  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
614  AC_SUBST(BUILD_OBJEXT)                         $NO_UNDEFINED -version-info libpcre_version"
 AC_SUBST(CC_FOR_BUILD)  
 AC_SUBST(CXX_FOR_BUILD)  
 AC_SUBST(CFLAGS_FOR_BUILD)  
 AC_SUBST(CXXFLAGS_FOR_BUILD)  
 AC_SUBST(CXXLDFLAGS)  
 AC_SUBST(EBCDIC)  
 AC_SUBST(HAVE_MEMMOVE)  
 AC_SUBST(HAVE_STRERROR)  
 AC_SUBST(LINK_SIZE)  
 AC_SUBST(MATCH_LIMIT)  
 AC_SUBST(MATCH_LIMIT_RECURSION)  
 AC_SUBST(NEWLINE)  
 AC_SUBST(NO_RECURSE)  
 AC_SUBST(PCRE_LIB_VERSION)  
 AC_SUBST(PCRE_POSIXLIB_VERSION)  
 AC_SUBST(PCRE_CPPLIB_VERSION)  
 AC_SUBST(PCRE_VERSION)  
 AC_SUBST(POSIX_MALLOC_THRESHOLD)  
 AC_SUBST(UCP)  
 AC_SUBST(UTF8)  
615    
616  dnl Stuff to make MinGW work better. Special treatment is no longer  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
617  dnl needed for Cygwin.                              $NO_UNDEFINED -version-info libpcreposix_version"
618    
619  case $host_os in  EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
620  mingw* )                            $NO_UNDEFINED -version-info libpcrecpp_version \
621      POSIX_OBJ=pcreposix.o                            $EXPORT_ALL_SYMBOLS"
622      POSIX_LOBJ=pcreposix.lo  
623      POSIX_LIB=  AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
624      ON_WINDOWS=  AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
625      NOT_ON_WINDOWS="#"  AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
626      WIN_PREFIX=  
627      ;;  # When we run 'make distcheck', use these arguments.
628  * )  DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
629      ON_WINDOWS="#"  AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
630      NOT_ON_WINDOWS=  
631      POSIX_OBJ=  # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
632      POSIX_LOBJ=  # specified, the relevant library is available.
633      POSIX_LIB=libpcreposix.la  
634      WIN_PREFIX=  if test "$enable_pcregrep_libz" = "yes"; then
635      ;;    if test "$HAVE_ZLIB_H" != "1"; then
636  esac      echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
637  AC_SUBST(WIN_PREFIX)      exit 1
638  AC_SUBST(ON_WINDOWS)    fi
639  AC_SUBST(NOT_ON_WINDOWS)    if test "$HAVE_LIBZ" != "1"; then
640  AC_SUBST(POSIX_OBJ)      echo "** Cannot --enable-pcregrep-libz because libz was not found"
641  AC_SUBST(POSIX_LOBJ)      exit 1
642  AC_SUBST(POSIX_LIB)    fi
643      LIBZ="-lz"
644    fi
645    AC_SUBST(LIBZ)
646    
647    if test "$enable_pcregrep_libbz2" = "yes"; then
648      if test "$HAVE_BZLIB_H" != "1"; then
649        echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
650        exit 1
651      fi
652      if test "$HAVE_LIBBZ2" != "1"; then
653        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
654        exit 1
655      fi
656      LIBBZ2="-lbz2"
657    fi
658    AC_SUBST(LIBBZ2)
659    
660    # Similarly for --enable-pcretest-readline
661    
662    if test "$enable_pcretest_libreadline" = "yes"; then
663      if test "$HAVE_READLINE_H" != "1"; then
664        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
665        exit 1
666      fi
667      if test "$HAVE_HISTORY_H" != "1"; then
668        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
669        exit 1
670      fi
671      LIBREADLINE="-lreadline"
672    fi
673    AC_SUBST(LIBREADLINE)
674    
675    # Produce these files, in addition to config.h.
676    AC_CONFIG_FILES(
677            Makefile
678            libpcre.pc
679            libpcreposix.pc
680            libpcrecpp.pc
681            pcre-config
682            pcre.h
683            pcre_stringpiece.h
684            pcrecpparg.h
685    )
686    
687    # Make the generated script files executable.
688    AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
689    
690    # Make sure that pcre_chartables.c is removed in case the method for
691    # creating it was changed by reconfiguration.
692    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
693    
694    AC_OUTPUT
695    
696    # Print out a nice little message after configure is run displaying your
697    # chosen options.
698    
699    cat <<EOF
700    
701    $PACKAGE-$VERSION configuration summary:
702    
703        Install prefix .................. : ${prefix}
704        C preprocessor .................. : ${CPP}
705        C compiler ...................... : ${CC}
706        C++ preprocessor ................ : ${CXXCPP}
707        C++ compiler .................... : ${CXX}
708        Linker .......................... : ${LD}
709        C preprocessor flags ............ : ${CPPFLAGS}
710        C compiler flags ................ : ${CFLAGS}
711        C++ compiler flags .............. : ${CXXFLAGS}
712        Linker flags .................... : ${LDFLAGS}
713        Extra libraries ................. : ${LIBS}
714    
715        Build C++ library ............... : ${enable_cpp}
716        Enable UTF-8 support ............ : ${enable_utf8}
717        Unicode properties .............. : ${enable_unicode_properties}
718        Newline char/sequence ........... : ${enable_newline}
719        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
720        EBCDIC coding ................... : ${enable_ebcdic}
721        Rebuild char tables ............. : ${enable_rebuild_chartables}
722        Use stack recursion ............. : ${enable_stack_for_recursion}
723        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
724        Internal link size .............. : ${with_link_size}
725        Match limit ..................... : ${with_match_limit}
726        Match limit recursion ........... : ${with_match_limit_recursion}
727        Build shared libs ............... : ${enable_shared}
728        Build static libs ............... : ${enable_static}
729        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
730        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
731        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
732    
733  if test "x$enable_shared" = "xno" ; then  EOF
     AC_DEFINE([PCRE_STATIC],[1],[to link statically])  
 fi  
734    
735  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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