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revision 89 by nigel, Sat Feb 24 21:41:27 2007 UTC revision 479 by ph10, Sun Jan 3 16:31:39 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, [-RC1])
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    # This was added at the suggestion of libtoolize (03-Jan-10)
26    AC_CONFIG_MACRO_DIR([m4])
27    
28    # The default CFLAGS and CXXFLAGS in Autoconf are "-g -O2" for gcc and just
29    # "-g" for any other compiler. There doesn't seem to be a standard way of
30    # getting rid of the -g (which I don't think is needed for a production
31    # library). This fudge seems to achieve the necessary. First, we remember the
32    # externally set values of CFLAGS and CXXFLAGS. Then call the AC_PROG_CC and
33    # AC_PROG_CXX macros to find the compilers - if CFLAGS and CXXFLAGS are not
34    # set, they will be set to Autoconf's defaults. Afterwards, if the original
35    # values were not set, remove the -g from the Autoconf defaults.
36    # (PH 02-May-07)
37    
38  AC_INIT(dftables.c)  remember_set_CFLAGS="$CFLAGS"
39  AC_CONFIG_SRCDIR([pcre.h])  remember_set_CXXFLAGS="$CXXFLAGS"
40    
41  dnl A safety precaution  AC_PROG_CC
42    AC_PROG_CXX
43    
44  AC_PREREQ(2.57)  if test "x$remember_set_CFLAGS" = "x"
45    then
46      if test "$CFLAGS" = "-g -O2"
47      then
48        CFLAGS="-O2"
49      elif test "$CFLAGS" = "-g"
50      then
51        CFLAGS=""
52      fi
53    fi
54    
55  dnl Arrange to build config.h from config.h.in.  if test "x$remember_set_CXXFLAGS" = "x"
56  dnl Manual says this macro should come right after AC_INIT.  then
57  AC_CONFIG_HEADER(config.h)    if test "$CXXFLAGS" = "-g -O2"
58      then
59        CXXFLAGS="-O2"
60      elif test "$CXXFLAGS" = "-g"
61      then
62        CXXFLAGS=""
63      fi
64    fi
65    
66  dnl Default values for miscellaneous macros  # AC_PROG_CXX will return "g++" even if no c++ compiler is installed.
67    # Check for that case, and just disable c++ code if g++ doesn't run.
68    AC_LANG_PUSH(C++)
69    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([],[]),, CXX=""; CXXCP=""; CXXFLAGS="")
70    AC_LANG_POP
71    
72  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10  # Check for a 64-bit integer type
73    AC_TYPE_INT64_T
74    
75  dnl Provide versioning information for libtool shared libraries that  AC_PROG_INSTALL
76  dnl are built by default on Unix systems.  AC_LIBTOOL_WIN32_DLL
77    AC_PROG_LIBTOOL
78    AC_PROG_LN_S
79    
80  PCRE_LIB_VERSION=0:1:0  PCRE_MAJOR="pcre_major"
81  PCRE_POSIXLIB_VERSION=0:0:0  PCRE_MINOR="pcre_minor"
82  PCRE_CPPLIB_VERSION=0:0:0  PCRE_PRERELEASE="pcre_prerelease"
83    PCRE_DATE="pcre_date"
84    
85    AC_SUBST(PCRE_MAJOR)
86    AC_SUBST(PCRE_MINOR)
87    AC_SUBST(PCRE_PRERELEASE)
88    AC_SUBST(PCRE_DATE)
89    
90  dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is  # Set a more sensible default value for $(htmldir).
91  dnl substituted in pcre-config.in.  if test "x$htmldir" = 'x${docdir}'
92    then
93      htmldir='${docdir}/html'
94    fi
95    
96  PCRE_MAJOR=`grep '#define PCRE_MAJOR' ${srcdir}/pcre.h | cut -c 29-`  # Handle --disable-cpp
97  PCRE_MINOR=`grep '#define PCRE_MINOR' ${srcdir}/pcre.h | cut -c 29-`  AC_ARG_ENABLE(cpp,
98  PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ${srcdir}/pcre.h | cut -c 29-`                AS_HELP_STRING([--disable-cpp],
99  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}                               [disable C++ support]),
100                  , enable_cpp=yes)
101    
102    # Handle --enable-rebuild-chartables
103    AC_ARG_ENABLE(rebuild-chartables,
104                  AS_HELP_STRING([--enable-rebuild-chartables],
105                                 [rebuild character tables in current locale]),
106                  , enable_rebuild_chartables=no)
107    
108  dnl Handle --disable-cpp  # Handle --enable-utf8 (disabled by default)
109    AC_ARG_ENABLE(utf8,
110                  AS_HELP_STRING([--enable-utf8],
111                                 [enable UTF-8 support (incompatible with --enable-ebcdic)]),
112                  , enable_utf8=unset)
113    
114  AC_ARG_ENABLE(cpp,  # Handle --enable-unicode-properties
115  [  --disable-cpp           disable C++ support],  AC_ARG_ENABLE(unicode-properties,
116  want_cpp="$enableval", want_cpp=yes)                AS_HELP_STRING([--enable-unicode-properties],
117                                 [enable Unicode properties support (implies --enable-utf8)]),
118                  , enable_unicode_properties=no)
119    
120    # Handle --enable-newline=NL
121    dnl AC_ARG_ENABLE(newline,
122    dnl               AS_HELP_STRING([--enable-newline=NL],
123    dnl                              [use NL as newline (lf, cr, crlf, anycrlf, any; default=lf)]),
124    dnl               , enable_newline=lf)
125    
126  dnl Checks for programs.  # Separate newline options
127    ac_pcre_newline=lf
128    AC_ARG_ENABLE(newline-is-cr,
129                  AS_HELP_STRING([--enable-newline-is-cr],
130                                 [use CR as newline character]),
131                  ac_pcre_newline=cr)
132    AC_ARG_ENABLE(newline-is-lf,
133                  AS_HELP_STRING([--enable-newline-is-lf],
134                                 [use LF as newline character (default)]),
135                  ac_pcre_newline=lf)
136    AC_ARG_ENABLE(newline-is-crlf,
137                  AS_HELP_STRING([--enable-newline-is-crlf],
138                                 [use CRLF as newline sequence]),
139                  ac_pcre_newline=crlf)
140    AC_ARG_ENABLE(newline-is-anycrlf,
141                  AS_HELP_STRING([--enable-newline-is-anycrlf],
142                                 [use CR, LF, or CRLF as newline sequence]),
143                  ac_pcre_newline=anycrlf)
144    AC_ARG_ENABLE(newline-is-any,
145                  AS_HELP_STRING([--enable-newline-is-any],
146                                 [use any valid Unicode newline sequence]),
147                  ac_pcre_newline=any)
148    enable_newline="$ac_pcre_newline"
149    
150    # Handle --enable-bsr-anycrlf
151    AC_ARG_ENABLE(bsr-anycrlf,
152                  AS_HELP_STRING([--enable-bsr-anycrlf],
153                                 [\R matches only CR, LF, CRLF by default]),
154                  , enable_bsr_anycrlf=no)
155    
156  AC_PROG_CC  # Handle --enable-ebcdic
157    AC_ARG_ENABLE(ebcdic,
158                  AS_HELP_STRING([--enable-ebcdic],
159                                 [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf8; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
160                  , enable_ebcdic=no)
161    
162  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that  # Handle --disable-stack-for-recursion
163  dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even  AC_ARG_ENABLE(stack-for-recursion,
164  dnl though that is completely bogus. (This may happen only on certain systems                AS_HELP_STRING([--disable-stack-for-recursion],
165  dnl with certain versions of autoconf, of course.) An attempt to include this                               [don't use stack recursion when matching]),
166  dnl test inside a check for want_cpp was criticized by a libtool expert, who                , enable_stack_for_recursion=yes)
167  dnl tells me that it isn't allowed.  
168    # Handle --enable-pcregrep-libz
169    AC_ARG_ENABLE(pcregrep-libz,
170                  AS_HELP_STRING([--enable-pcregrep-libz],
171                                 [link pcregrep with libz to handle .gz files]),
172                  , enable_pcregrep_libz=no)
173    
174    # Handle --enable-pcregrep-libbz2
175    AC_ARG_ENABLE(pcregrep-libbz2,
176                  AS_HELP_STRING([--enable-pcregrep-libbz2],
177                                 [link pcregrep with libbz2 to handle .bz2 files]),
178                  , enable_pcregrep_libbz2=no)
179    
180    # Handle --enable-pcretest-libreadline
181    AC_ARG_ENABLE(pcretest-libreadline,
182                  AS_HELP_STRING([--enable-pcretest-libreadline],
183                                 [link pcretest with libreadline]),
184                  , enable_pcretest_libreadline=no)
185    
186  AC_PROG_CXX  # Handle --with-posix-malloc-threshold=NBYTES
187    AC_ARG_WITH(posix-malloc-threshold,
188                AS_HELP_STRING([--with-posix-malloc-threshold=NBYTES],
189                               [threshold for POSIX malloc usage (default=10)]),
190                , with_posix_malloc_threshold=10)
191    
192  dnl The icc compiler has the same options as gcc, so let the rest of the  # Handle --with-link-size=N
193  dnl configure script think it has gcc when setting up dnl options etc.  AC_ARG_WITH(link-size,
194  dnl This is a nasty hack which no longer seems necessary with the update              AS_HELP_STRING([--with-link-size=N],
195  dnl to the latest libtool files, so I have commented it out.                             [internal link size (2, 3, or 4 allowed; default=2)]),
196  dnl              , with_link_size=2)
 dnl if test "$CC" = "icc" ; then GCC=yes ; fi  
197    
198  AC_PROG_INSTALL  # Handle --with-match-limit=N
199  AC_LIBTOOL_WIN32_DLL  AC_ARG_WITH(match-limit,
200  AC_PROG_LIBTOOL              AS_HELP_STRING([--with-match-limit=N],
201                               [default limit on internal looping (default=10000000)]),
202                , with_match_limit=10000000)
203    
204    # Handle --with-match-limit_recursion=N
205    #
206    # Note: In config.h, the default is to define MATCH_LIMIT_RECURSION
207    # symbolically as MATCH_LIMIT, which in turn is defined to be some numeric
208    # value (e.g. 10000000). MATCH_LIMIT_RECURSION can otherwise be set to some
209    # different numeric value (or even the same numeric value as MATCH_LIMIT,
210    # though no longer defined in terms of the latter).
211    #
212    AC_ARG_WITH(match-limit-recursion,
213                AS_HELP_STRING([--with-match-limit-recursion=N],
214                               [default limit on internal recursion (default=MATCH_LIMIT)]),
215                , with_match_limit_recursion=MATCH_LIMIT)
216    
217    # Make sure that if enable_unicode_properties was set, that UTF-8 support
218    # is enabled.
219    #
220    if test "x$enable_unicode_properties" = "xyes"
221    then
222      if test "x$enable_utf8" = "xno"
223      then
224        AC_MSG_ERROR([support for Unicode properties requires UTF-8 support])
225      fi
226      enable_utf8=yes
227    fi
228    
229  dnl We need to find a compiler for compiling a program to run on the local host  if test "x$enable_utf8" = "xunset"
230  dnl while building. It needs to be different from CC when cross-compiling.  then
231  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for    enable_utf8=no
232  dnl figuring this out automatically. Unfortunately, it does not work with the  fi
 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)'}  
233    
234  dnl Checks for header files.  # Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
235    # Also check that UTF-8 support is not requested, because PCRE cannot handle
236    # EBCDIC and UTF-8 in the same build. To do so it would need to use different
237    # character constants depending on the mode.
238    #
239    if test "x$enable_ebcdic" = "xyes"
240    then
241      enable_rebuild_chartables=yes
242      if test "x$enable_utf8" = "xyes"
243      then
244        AC_MSG_ERROR([support for EBCDIC and UTF-8 cannot be enabled at the same time])
245      fi
246    fi
247    
248  AC_HEADER_STDC  # Convert the newline identifier into the appropriate integer value.
249  AC_CHECK_HEADERS(limits.h)  case "$enable_newline" in
250      lf)      ac_pcre_newline_value=10   ;;
251      cr)      ac_pcre_newline_value=13   ;;
252      crlf)    ac_pcre_newline_value=3338 ;;
253      anycrlf) ac_pcre_newline_value=-2   ;;
254      any)     ac_pcre_newline_value=-1   ;;
255      *)
256      AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])
257      ;;
258    esac
259    
260    # Check argument to --with-link-size
261    case "$with_link_size" in
262      2|3|4) ;;
263      *)
264      AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])
265      ;;
266    esac
267    
268    AH_TOP([
269    /* On Unix-like systems config.h.in is converted by "configure" into config.h.
270    Some other environments also support the use of "configure". PCRE is written in
271    Standard C, but there are a few non-standard things it can cope with, allowing
272    it to run on SunOS4 and other "close to standard" systems.
273    
274    If you are going to build PCRE "by hand" on a system without "configure" you
275    should copy the distributed config.h.generic to config.h, and then set up the
276    macro definitions the way you need them. You must then add -DHAVE_CONFIG_H to
277    all of your compile commands, so that config.h is included at the start of
278    every source.
279    
280    Alternatively, you can avoid editing by using -D on the compiler command line
281    to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H.
282    
283    PCRE uses memmove() if HAVE_MEMMOVE is set to 1; otherwise it uses bcopy() if
284    HAVE_BCOPY is set to 1. If your system has neither bcopy() nor memmove(), set
285    them both to 0; an emulation function will be used. */])
286    
287  dnl The files below are C++ header files. One person told me (PH) that  # Checks for header files.
288  dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which  AC_HEADER_STDC
289  dnl doesn't work. However, this doesn't always seem to be the case.  AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h windows.h)
290    
291  if test "x$want_cpp" = "xyes" -a -n "$CXX"  # The files below are C++ header files.
292    pcre_have_type_traits="0"
293    pcre_have_bits_type_traits="0"
294    if test "x$enable_cpp" = "xyes" -a -n "$CXX"
295  then  then
296  AC_LANG_SAVE  AC_LANG_PUSH(C++)
 AC_LANG_CPLUSPLUS  
297    
298  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
299  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,
300  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
301    # this in different ways.  Some systems, for instance, can do it via
302    # a linker flag: -alias (for os x 10.5) or -i (for os x <=10.4).
303    OLD_LDFLAGS="$LDFLAGS"
304    for flag in "-alias,__ZN7pcrecpp2RE6no_argE,__ZN7pcrecpp6no_argE" \
305                "-i__ZN7pcrecpp6no_argE:__ZN7pcrecpp2RE6no_argE"; do
306      AC_MSG_CHECKING([for alias support in the linker])
307      LDFLAGS="$OLD_LDFLAGS -Wl,$flag"
308      # We try to run the linker with this new ld flag.  If the link fails,
309      # we give up and remove the new flag from LDFLAGS.
310      AC_LINK_IFELSE(AC_LANG_PROGRAM([namespace pcrecpp {
311                                        class RE { static int no_arg; };
312                                        int RE::no_arg;
313                                      }],
314                                     []),
315                     [AC_MSG_RESULT([yes]);
316                      EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS -Wl,$flag";
317                      break;],
318                     AC_MSG_RESULT([no]))
319    done
320    LDFLAGS="$OLD_LDFLAGS"
321    
322    # We could be more clever here, given we're doing AC_SUBST with this
323    # (eg set a var to be the name of the include file we want). But we're not
324    # so it's easy to change back to 'regular' autoconf vars if we needed to.
325  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
326                           [pcre_have_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
327  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"],
328                                       [pcre_have_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
329  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
330                                  [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  
331    
332  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="#"  
333  fi  fi
334  AC_SUBST(MAYBE_CPP_TARGETS)  # Using AC_SUBST eliminates the need to include config.h in a public .h file
335  AC_SUBST(HAVE_CPP)  AC_SUBST(pcre_have_type_traits)
336    AC_SUBST(pcre_have_bits_type_traits)
337    
338    # Conditional compilation
339    AM_CONDITIONAL(WITH_PCRE_CPP, test "x$enable_cpp" = "xyes")
340    AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
341    
342  dnl Checks for typedefs, structures, and compiler characteristics.  # Checks for typedefs, structures, and compiler characteristics.
343    
344  AC_C_CONST  AC_C_CONST
345  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
346    
347  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])  pcre_have_strotolonglong=0
348  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])
349    # If we can't convert a string to a long long, pretend we don't even
350    # have a long long.
351    if test $pcre_have_strotolonglong = "0"; then
352       pcre_have_long_long="0"
353       pcre_have_ulong_long="0"
354    else
355      AC_CHECK_TYPES([long long],
356                     [pcre_have_long_long="1"],
357                     [pcre_have_long_long="0"])
358      AC_CHECK_TYPES([unsigned long long],
359                     [pcre_have_ulong_long="1"],
360                     [pcre_have_ulong_long="0"])
361    fi
362  AC_SUBST(pcre_have_long_long)  AC_SUBST(pcre_have_long_long)
363  AC_SUBST(pcre_have_ulong_long)  AC_SUBST(pcre_have_ulong_long)
364    
365  dnl Checks for library functions.  # Checks for library functions.
   
 AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)  
366    
367  dnl Handle --enable-utf8  AC_CHECK_FUNCS(bcopy memmove strerror)
368    
369  AC_ARG_ENABLE(utf8,  # Check for the availability of libz (aka zlib)
 [  --enable-utf8           enable UTF8 support],  
 if test "$enableval" = "yes"; then  
   UTF8=-DSUPPORT_UTF8  
 fi  
 )  
370    
371  dnl Handle --enable-unicode-properties  AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
372    AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
373    
374  AC_ARG_ENABLE(unicode-properties,  # Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
375  [  --enable-unicode-properties  enable Unicode properties support],  # as for libz. However, this had the following problem, diagnosed and fixed by
376  if test "$enableval" = "yes"; then  # a user:
377    UCP=-DSUPPORT_UCP  #
378  fi  #   - libbz2 uses the Pascal calling convention (WINAPI) for the functions
379  )  #     under Win32.
380    #   - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",
381    #     therefore missing the function definition.
382    #   - The compiler thus generates a "C" signature for the test function.
383    #   - The linker fails to find the "C" function.
384    #   - PCRE fails to configure if asked to do so against libbz2.
385    #
386    # Solution:
387    #
388    #   - Replace the AC_CHECK_LIB test with a custom test.
389    
390    AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
391    # Original test
392    # AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
393    #
394    # Custom test follows
395    
396    AC_MSG_CHECKING([for libbz2])
397    OLD_LIBS="$LIBS"
398    LIBS="$LIBS -lbz2"
399    AC_LINK_IFELSE( AC_LANG_PROGRAM([[
400    #ifdef HAVE_BZLIB_H
401    #include <bzlib.h>
402    #endif]],
403    [[return (int)BZ2_bzopen("conftest", "rb");]]),
404    [AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],
405    AC_MSG_RESULT([no]))
406    LIBS="$OLD_LIBS"
407    
408    # Check for the availabiity of libreadline
409    
410    AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
411    AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
412    AC_CHECK_LIB([readline], [readline], [HAVE_LIB_READLINE=1])
413    
414  dnl Handle --enable-newline-is-cr  # This facilitates -ansi builds under Linux
415    dnl AC_DEFINE([_GNU_SOURCE], [], [Enable GNU extensions in glibc])
416    
417  AC_ARG_ENABLE(newline-is-cr,  PCRE_STATIC_CFLAG=""
418  [  --enable-newline-is-cr  use CR as the newline character],  if test "x$enable_shared" = "xno" ; then
419  if test "$enableval" = "yes"; then    AC_DEFINE([PCRE_STATIC], [1], [
420    NEWLINE=-DNEWLINE=13      Define if linking statically (TODO: make nice with Libtool)])
421      PCRE_STATIC_CFLAG="-DPCRE_STATIC"
422  fi  fi
423  )  AC_SUBST(PCRE_STATIC_CFLAG)
424    
425  dnl Handle --enable-newline-is-lf  # Here is where pcre specific defines are handled
426    
427  AC_ARG_ENABLE(newline-is-lf,  if test "$enable_utf8" = "yes"; then
428  [  --enable-newline-is-lf  use LF as the newline character],    AC_DEFINE([SUPPORT_UTF8], [], [
429  if test "$enableval" = "yes"; then      Define to enable support for the UTF-8 Unicode encoding. This will
430    NEWLINE=-DNEWLINE=10      work even in an EBCDIC environment, but it is incompatible with
431        the EBCDIC macro. That is, PCRE can support *either* EBCDIC code
432        *or* ASCII/UTF-8, but not both at once.])
433  fi  fi
 )  
434    
435  dnl Handle --enable-ebcdic  if test "$enable_unicode_properties" = "yes"; then
436      AC_DEFINE([SUPPORT_UCP], [], [
437        Define to enable support for Unicode properties])
438    fi
439    
440  AC_ARG_ENABLE(ebcdic,  if test "$enable_stack_for_recursion" = "no"; then
441  [  --enable-ebcdic         assume EBCDIC coding rather than ASCII],    AC_DEFINE([NO_RECURSE], [], [
442  if test "$enableval" == "yes"; then      PCRE uses recursive function calls to handle backtracking while
443    EBCDIC=-DEBCDIC=1      matching. This can sometimes be a problem on systems that have
444        stacks of limited size. Define NO_RECURSE to get a version that
445        doesn't use recursion in the match() function; instead it creates
446        its own stack by steam using pcre_recurse_malloc() to obtain memory
447        from the heap. For more detail, see the comments and other stuff
448        just above the match() function. On systems that support it,
449        "configure" can be used to set this in the Makefile
450        (use --disable-stack-for-recursion).])
451  fi  fi
 )  
452    
453  dnl Handle --disable-stack-for-recursion  if test "$enable_pcregrep_libz" = "yes"; then
454      AC_DEFINE([SUPPORT_LIBZ], [], [
455        Define to allow pcregrep to be linked with libz, so that it is
456        able to handle .gz files.])
457    fi
458    
459  AC_ARG_ENABLE(stack-for-recursion,  if test "$enable_pcregrep_libbz2" = "yes"; then
460  [  --disable-stack-for-recursion  disable use of stack recursion when matching],    AC_DEFINE([SUPPORT_LIBBZ2], [], [
461  if test "$enableval" = "no"; then      Define to allow pcregrep to be linked with libbz2, so that it is
462    NO_RECURSE=-DNO_RECURSE      able to handle .bz2 files.])
463  fi  fi
 )  
464    
465  dnl There doesn't seem to be a straightforward way of having parameters  if test "$enable_pcretest_libreadline" = "yes"; then
466  dnl that set values, other than fudging the --with thing. So that's what    AC_DEFINE([SUPPORT_LIBREADLINE], [], [
467  dnl I've done.      Define to allow pcretest to be linked with libreadline.])
468    fi
469    
470  dnl Handle --with-posix-malloc-threshold=n  AC_DEFINE_UNQUOTED([NEWLINE], [$ac_pcre_newline_value], [
471      The value of NEWLINE determines the newline character sequence. On
472      systems that support it, "configure" can be used to override the
473      default, which is 10. The possible values are 10 (LF), 13 (CR),
474      3338 (CRLF), -1 (ANY), or -2 (ANYCRLF).])
475    
476    if test "$enable_bsr_anycrlf" = "yes"; then
477      AC_DEFINE([BSR_ANYCRLF], [], [
478        By default, the \R escape sequence matches any Unicode line ending
479        character or sequence of characters. If BSR_ANYCRLF is defined, this is
480        changed so that backslash-R matches only CR, LF, or CRLF. The build-
481        time default can be overridden by the user of PCRE at runtime. On
482        systems that support it, "configure" can be used to override the
483        default.])
484    fi
485    
486  AC_ARG_WITH(posix-malloc-threshold,  AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
487  [  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],    The value of LINK_SIZE determines the number of bytes used to store
488    POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval    links as offsets within the compiled regex. The default is 2, which
489  )    allows for compiled patterns up to 64K long. This covers the vast
490      majority of cases. However, PCRE can also be compiled to use 3 or 4
491      bytes instead. This allows for longer patterns in extreme cases. On
492      systems that support it, "configure" can be used to override this default.])
493    
494    AC_DEFINE_UNQUOTED([POSIX_MALLOC_THRESHOLD], [$with_posix_malloc_threshold], [
495      When calling PCRE via the POSIX interface, additional working storage
496      is required for holding the pointers to capturing substrings because
497      PCRE requires three integers per substring, whereas the POSIX
498      interface provides only two. If the number of expected substrings is
499      small, the wrapper function uses space on the stack, because this is
500      faster than using malloc() for each call. The threshold above which
501      the stack is no longer used is defined by POSIX_MALLOC_THRESHOLD. On
502      systems that support it, "configure" can be used to override this
503      default.])
504    
505    AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
506      The value of MATCH_LIMIT determines the default number of times the
507      internal match() function can be called during a single execution of
508      pcre_exec(). There is a runtime interface for setting a different
509      limit. The limit exists in order to catch runaway regular
510      expressions that take for ever to determine that they do not match.
511      The default is set very large so that it does not accidentally catch
512      legitimate cases. On systems that support it, "configure" can be
513      used to override this default default.])
514    
515    AC_DEFINE_UNQUOTED([MATCH_LIMIT_RECURSION], [$with_match_limit_recursion], [
516      The above limit applies to all calls of match(), whether or not they
517      increase the recursion depth. In some environments it is desirable
518      to limit the depth of recursive calls of match() more strictly, in
519      order to restrict the maximum amount of stack (or heap, if
520      NO_RECURSE is defined) that is used. The value of
521      MATCH_LIMIT_RECURSION applies only to recursive calls of match(). To
522      have any useful effect, it must be less than the value of
523      MATCH_LIMIT. The default is to use the same value as MATCH_LIMIT.
524      There is a runtime method for setting a different limit. On systems
525      that support it, "configure" can be used to override the default.])
526    
527    AC_DEFINE([MAX_NAME_SIZE], [32], [
528      This limit is parameterized just in case anybody ever wants to
529      change it. Care must be taken if it is increased, because it guards
530      against integer overflow caused by enormously large patterns.])
531    
532    AC_DEFINE([MAX_NAME_COUNT], [10000], [
533      This limit is parameterized just in case anybody ever wants to
534      change it. Care must be taken if it is increased, because it guards
535      against integer overflow caused by enormously large patterns.])
536    
537    AH_VERBATIM([PCRE_EXP_DEFN], [
538    /* If you are compiling for a system other than a Unix-like system or
539       Win32, and it needs some magic to be inserted before the definition
540       of a function that is exported by the library, define this macro to
541       contain the relevant magic. If you do not define this macro, it
542       defaults to "extern" for a C compiler and "extern C" for a C++
543       compiler on non-Win32 systems. This macro apears at the start of
544       every exported function that is part of the external API. It does
545       not appear on functions that are "external" in the C sense, but
546       which are internal to the library. */
547    #undef PCRE_EXP_DEFN])
548    
549    if test "$enable_ebcdic" = "yes"; then
550      AC_DEFINE_UNQUOTED([EBCDIC], [], [
551        If you are compiling for a system that uses EBCDIC instead of ASCII
552        character codes, define this macro as 1. On systems that can use
553        "configure", this can be done via --enable-ebcdic. PCRE will then
554        assume that all input strings are in EBCDIC. If you do not define
555        this macro, PCRE will assume input strings are ASCII or UTF-8 Unicode.
556        It is not possible to build a version of PCRE that supports both
557        EBCDIC and UTF-8.])
558    fi
559    
560  dnl Handle --with-link-size=n  # Platform specific issues
561    NO_UNDEFINED=
562    EXPORT_ALL_SYMBOLS=
563    case $host_os in
564      cygwin* | mingw* )
565        if test X"$enable_shared" = Xyes; then
566          NO_UNDEFINED="-no-undefined"
567          EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
568        fi
569        ;;
570    esac
571    
572  AC_ARG_WITH(link-size,  # The extra LDFLAGS for each particular library
573  [  --with-link-size=2    internal link size (2, 3, or 4 allowed)],  # (Note: The libpcre*_version bits are m4 variables, assigned above)
   LINK_SIZE=-DLINK_SIZE=$withval  
 )  
574    
575  dnl Handle --with-match-limit=n  EXTRA_LIBPCRE_LDFLAGS="$EXTRA_LIBPCRE_LDFLAGS \
576                           $NO_UNDEFINED -version-info libpcre_version"
577    
578  AC_ARG_WITH(match-limit,  EXTRA_LIBPCREPOSIX_LDFLAGS="$EXTRA_LIBPCREPOSIX_LDFLAGS \
579  [  --with-match-limit=10000000  default limit on internal looping],                              $NO_UNDEFINED -version-info libpcreposix_version"
   MATCH_LIMIT=-DMATCH_LIMIT=$withval  
 )  
580    
581  dnl Handle --with-match-limit_recursion=n  EXTRA_LIBPCRECPP_LDFLAGS="$EXTRA_LIBPCRECPP_LDFLAGS \
582                              $NO_UNDEFINED -version-info libpcrecpp_version \
583                              $EXPORT_ALL_SYMBOLS"
584    
585    AC_SUBST(EXTRA_LIBPCRE_LDFLAGS)
586    AC_SUBST(EXTRA_LIBPCREPOSIX_LDFLAGS)
587    AC_SUBST(EXTRA_LIBPCRECPP_LDFLAGS)
588    
589    # When we run 'make distcheck', use these arguments.
590    DISTCHECK_CONFIGURE_FLAGS="--enable-cpp --enable-unicode-properties"
591    AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)
592    
593    # Check that, if --enable-pcregrep-libz or --enable-pcregrep-libbz2 is
594    # specified, the relevant library is available.
595    
596    if test "$enable_pcregrep_libz" = "yes"; then
597      if test "$HAVE_ZLIB_H" != "1"; then
598        echo "** Cannot --enable-pcregrep-libz because zlib.h was not found"
599        exit 1
600      fi
601      if test "$HAVE_LIBZ" != "1"; then
602        echo "** Cannot --enable-pcregrep-libz because libz was not found"
603        exit 1
604      fi
605      LIBZ="-lz"
606    fi
607    AC_SUBST(LIBZ)
608    
609  AC_ARG_WITH(match-limit-recursion,  if test "$enable_pcregrep_libbz2" = "yes"; then
610  [  --with-match-limit-recursion=10000000  default limit on internal recursion],    if test "$HAVE_BZLIB_H" != "1"; then
611    MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval      echo "** Cannot --enable-pcregrep-libbz2 because bzlib.h was not found"
612  )      exit 1
613      fi
614      if test "$HAVE_LIBBZ2" != "1"; then
615        echo "** Cannot --enable-pcregrep-libbz2 because libbz2 was not found"
616        exit 1
617      fi
618      LIBBZ2="-lbz2"
619    fi
620    AC_SUBST(LIBBZ2)
621    
622  dnl Unicode character property support implies UTF-8 support  # Similarly for --enable-pcretest-readline
623    
624  if test "$UCP" != "" ; then  if test "$enable_pcretest_libreadline" = "yes"; then
625    UTF8=-DSUPPORT_UTF8    if test "$HAVE_READLINE_H" != "1"; then
626        echo "** Cannot --enable-pcretest-readline because readline/readline.h was not found."
627        exit 1
628      fi
629      if test "$HAVE_HISTORY_H" != "1"; then
630        echo "** Cannot --enable-pcretest-readline because readline/history.h was not found."
631        exit 1
632      fi
633      LIBREADLINE="-lreadline"
634  fi  fi
635    AC_SUBST(LIBREADLINE)
636    
637  dnl "Export" these variables  # Produce these files, in addition to config.h.
638    AC_CONFIG_FILES(
639            Makefile
640            libpcre.pc
641            libpcreposix.pc
642            libpcrecpp.pc
643            pcre-config
644            pcre.h
645            pcre_stringpiece.h
646            pcrecpparg.h
647    )
648    
649  AC_SUBST(BUILD_EXEEXT)  # Make the generated script files executable.
650  AC_SUBST(BUILD_OBJEXT)  AC_CONFIG_COMMANDS([script-chmod], [chmod a+x pcre-config])
 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)  
651    
652  dnl Stuff to make MinGW work better. Special treatment is no longer  # Make sure that pcre_chartables.c is removed in case the method for
653  dnl needed for Cygwin.  # creating it was changed by reconfiguration.
654    AC_CONFIG_COMMANDS([delete-old-chartables], [rm -f pcre_chartables.c])
655    
656    AC_OUTPUT
657    
658    # Print out a nice little message after configure is run displaying your
659    # chosen options.
660    
661    cat <<EOF
662    
663    $PACKAGE-$VERSION configuration summary:
664    
665        Install prefix .................. : ${prefix}
666        C preprocessor .................. : ${CPP}
667        C compiler ...................... : ${CC}
668        C++ preprocessor ................ : ${CXXCPP}
669        C++ compiler .................... : ${CXX}
670        Linker .......................... : ${LD}
671        C preprocessor flags ............ : ${CPPFLAGS}
672        C compiler flags ................ : ${CFLAGS}
673        C++ compiler flags .............. : ${CXXFLAGS}
674        Linker flags .................... : ${LDFLAGS}
675        Extra libraries ................. : ${LIBS}
676    
677        Build C++ library ............... : ${enable_cpp}
678        Enable UTF-8 support ............ : ${enable_utf8}
679        Unicode properties .............. : ${enable_unicode_properties}
680        Newline char/sequence ........... : ${enable_newline}
681        \R matches only ANYCRLF ......... : ${enable_bsr_anycrlf}
682        EBCDIC coding ................... : ${enable_ebcdic}
683        Rebuild char tables ............. : ${enable_rebuild_chartables}
684        Use stack recursion ............. : ${enable_stack_for_recursion}
685        POSIX mem threshold ............. : ${with_posix_malloc_threshold}
686        Internal link size .............. : ${with_link_size}
687        Match limit ..................... : ${with_match_limit}
688        Match limit recursion ........... : ${with_match_limit_recursion}
689        Build shared libs ............... : ${enable_shared}
690        Build static libs ............... : ${enable_static}
691        Link pcregrep with libz ......... : ${enable_pcregrep_libz}
692        Link pcregrep with libbz2 ....... : ${enable_pcregrep_libbz2}
693        Link pcretest with libreadline .. : ${enable_pcretest_libreadline}
694    
695  case $host_os in  EOF
 mingw* )  
     POSIX_OBJ=pcreposix.o  
     POSIX_LOBJ=pcreposix.lo  
     POSIX_LIB=  
     ON_WINDOWS=  
     NOT_ON_WINDOWS="#"  
     WIN_PREFIX=  
     ;;  
 * )  
     ON_WINDOWS="#"  
     NOT_ON_WINDOWS=  
     POSIX_OBJ=  
     POSIX_LOBJ=  
     POSIX_LIB=libpcreposix.la  
     WIN_PREFIX=  
     ;;  
 esac  
 AC_SUBST(WIN_PREFIX)  
 AC_SUBST(ON_WINDOWS)  
 AC_SUBST(NOT_ON_WINDOWS)  
 AC_SUBST(POSIX_OBJ)  
 AC_SUBST(POSIX_LOBJ)  
 AC_SUBST(POSIX_LIB)  
   
 if test "x$enable_shared" = "xno" ; then  
     AC_DEFINE([PCRE_STATIC],[1],[to link statically])  
 fi  
696    
697  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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