dnl Process this file with autoconf to produce a configure script.

dnl NOTE FOR MAINTAINERS: Do not use minor version numbers 08 or 09 because

dnl the leading zeros may cause them to be treated as invalid octal constants

dnl if a PCRE2 user writes code that uses PCRE2_MINOR as a number. There is now

dnl a check further down that throws an error if 08 or 09 are used.

dnl The PCRE2_PRERELEASE feature is for identifying release candidates. It might

dnl be defined as -RC2, for example. For real releases, it should be empty.

m4_define(pcre2_major, [10])

m4_define(pcre2_minor, [32])

m4_define(pcre2_prerelease, [])

m4_define(pcre2_date, [2018-09-10])

# NOTE: The CMakeLists.txt file searches for the above variables in the first

# 50 lines of this file. Please update that if the variables above are moved.

# Libtool shared library interface versions (current:revision:age)

m4_define(libpcre2_8_version,     [7:1:7])

m4_define(libpcre2_16_version,    [7:1:7])

m4_define(libpcre2_32_version,    [7:1:7])

m4_define(libpcre2_posix_version, [2:1:0])

AC_PREREQ(2.57)

AC_INIT(PCRE2, pcre2_major.pcre2_minor[]pcre2_prerelease, , pcre2)

AC_CONFIG_SRCDIR([src/pcre2.h.in])

AM_INIT_AUTOMAKE([dist-bzip2 dist-zip])

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

AC_CONFIG_HEADERS(src/config.h)

# This was added at the suggestion of libtoolize (03-Jan-10)

AC_CONFIG_MACRO_DIR([m4])

# The default CFLAGS in Autoconf are "-g -O2" for gcc and just "-g" for any

# other compiler. There doesn't seem to be a standard way of getting rid of the

# -g (which I don't think is needed for a production library). This fudge seems

# to achieve the necessary. First, we remember the externally set values of

# CFLAGS. Then call the AC_PROG_CC macro to find the compiler - if CFLAGS is

# not set, it will be set to Autoconf's defaults. Afterwards, if the original

# values were not set, remove the -g from the Autoconf defaults.

remember_set_CFLAGS="$CFLAGS"

AC_PROG_CC

AM_PROG_CC_C_O

AC_USE_SYSTEM_EXTENSIONS

if test "x$remember_set_CFLAGS" = "x"

then

  if test "$CFLAGS" = "-g -O2"

  then

    CFLAGS="-O2"

  elif test "$CFLAGS" = "-g"

  then

    CFLAGS=""

  fi

fi

# This is a new thing required to stop a warning from automake 1.12

m4_ifdef([AM_PROG_AR], [AM_PROG_AR])

# Check for a 64-bit integer type

AC_TYPE_INT64_T

AC_PROG_INSTALL

AC_LIBTOOL_WIN32_DLL

LT_INIT

AC_PROG_LN_S

# Check for GCC visibility feature

PCRE2_VISIBILITY

# Versioning

PCRE2_MAJOR="pcre2_major"

PCRE2_MINOR="pcre2_minor"

PCRE2_PRERELEASE="pcre2_prerelease"

PCRE2_DATE="pcre2_date"

if test "$PCRE2_MINOR" = "08" -o "$PCRE2_MINOR" = "09"

then

  echo "***"

  echo "*** Minor version number $PCRE2_MINOR must not be used. ***"

  echo "*** Use only 00 to 07 or 10 onwards, to avoid octal issues. ***"

  echo "***"

  exit 1

fi

AC_SUBST(PCRE2_MAJOR)

AC_SUBST(PCRE2_MINOR)

AC_SUBST(PCRE2_PRERELEASE)

AC_SUBST(PCRE2_DATE)

# Set a more sensible default value for $(htmldir).

if test "x$htmldir" = 'x${docdir}'

then

  htmldir='${docdir}/html'

fi

# Force an error for PCRE1 size options

AC_ARG_ENABLE(pcre8,,,enable_pcre8=no)

AC_ARG_ENABLE(pcre16,,,enable_pcre16=no)

AC_ARG_ENABLE(pcre32,,,enable_pcre32=no)

if test "$enable_pcre8$enable_pcre16$enable_pcre32" != "nonono"

then

  echo "** ERROR: Use --[[en|dis]]able-pcre2-[[8|16|32]], not --[[en|dis]]able-pcre[[8|16|32]]"

  exit 1

fi

# Handle --disable-pcre2-8 (enabled by default)

AC_ARG_ENABLE(pcre2-8,

              AS_HELP_STRING([--disable-pcre2-8],

                             [disable 8 bit character support]),

              , enable_pcre2_8=unset)

AC_SUBST(enable_pcre2_8)

# Handle --enable-pcre2-16 (disabled by default)

AC_ARG_ENABLE(pcre2-16,

              AS_HELP_STRING([--enable-pcre2-16],

                             [enable 16 bit character support]),

              , enable_pcre2_16=unset)

AC_SUBST(enable_pcre2_16)

# Handle --enable-pcre2-32 (disabled by default)

AC_ARG_ENABLE(pcre2-32,

              AS_HELP_STRING([--enable-pcre2-32],

                             [enable 32 bit character support]),

              , enable_pcre2_32=unset)

AC_SUBST(enable_pcre2_32)

# Handle --dnable-debug (disabled by default)

AC_ARG_ENABLE(debug,

              AS_HELP_STRING([--enable-debug],

                             [enable debugging code]),

              , enable_debug=no)

# Handle --enable-jit (disabled by default)

AC_ARG_ENABLE(jit,

              AS_HELP_STRING([--enable-jit],

                             [enable Just-In-Time compiling support]),

              , enable_jit=no)

# This code enables JIT if the hardware supports it.

if test "$enable_jit" = "auto"; then

  AC_LANG(C)

  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[

  #define SLJIT_CONFIG_AUTO 1

  #include "src/sljit/sljitConfigInternal.h"

  #if (defined SLJIT_CONFIG_UNSUPPORTED && SLJIT_CONFIG_UNSUPPORTED)

  #error unsupported

  #endif]])], enable_jit=yes, enable_jit=no)

  echo checking for JIT support on this hardware... $enable_jit

fi

# Handle --enable-jit-sealloc (disabled by default)

AC_ARG_ENABLE(jit-sealloc,

              AS_HELP_STRING([--enable-jit-sealloc],

                             [enable SELinux compatible execmem allocator in JIT]),

              , enable_jit_sealloc=no)

# Handle --disable-pcre2grep-jit (enabled by default)

AC_ARG_ENABLE(pcre2grep-jit,

              AS_HELP_STRING([--disable-pcre2grep-jit],

                             [disable JIT support in pcre2grep]),

              , enable_pcre2grep_jit=yes)

# Handle --disable-pcre2grep-callout (enabled by default)

AC_ARG_ENABLE(pcre2grep-callout,

              AS_HELP_STRING([--disable-pcre2grep-callout],

                             [disable callout script support in pcre2grep]),

              , enable_pcre2grep_callout=yes)

# Handle --enable-rebuild-chartables

AC_ARG_ENABLE(rebuild-chartables,

              AS_HELP_STRING([--enable-rebuild-chartables],

                             [rebuild character tables in current locale]),

              , enable_rebuild_chartables=no)

# Handle --disable-unicode (enabled by default)

AC_ARG_ENABLE(unicode,

              AS_HELP_STRING([--disable-unicode],

                             [disable Unicode support]),

              , enable_unicode=unset)

# Handle newline options

ac_pcre2_newline=lf

AC_ARG_ENABLE(newline-is-cr,

              AS_HELP_STRING([--enable-newline-is-cr],

                             [use CR as newline character]),

              ac_pcre2_newline=cr)

AC_ARG_ENABLE(newline-is-lf,

              AS_HELP_STRING([--enable-newline-is-lf],

                             [use LF as newline character (default)]),

              ac_pcre2_newline=lf)

AC_ARG_ENABLE(newline-is-crlf,

              AS_HELP_STRING([--enable-newline-is-crlf],

                             [use CRLF as newline sequence]),

              ac_pcre2_newline=crlf)

AC_ARG_ENABLE(newline-is-anycrlf,

              AS_HELP_STRING([--enable-newline-is-anycrlf],

                             [use CR, LF, or CRLF as newline sequence]),

              ac_pcre2_newline=anycrlf)

AC_ARG_ENABLE(newline-is-any,

              AS_HELP_STRING([--enable-newline-is-any],

                             [use any valid Unicode newline sequence]),

              ac_pcre2_newline=any)

AC_ARG_ENABLE(newline-is-nul,

              AS_HELP_STRING([--enable-newline-is-nul],

                             [use NUL (binary zero) as newline character]),

              ac_pcre2_newline=nul)

enable_newline="$ac_pcre2_newline"

# Handle --enable-bsr-anycrlf

AC_ARG_ENABLE(bsr-anycrlf,

              AS_HELP_STRING([--enable-bsr-anycrlf],

                             [\R matches only CR, LF, CRLF by default]),

              , enable_bsr_anycrlf=no)

# Handle --enable-never-backslash-C

AC_ARG_ENABLE(never-backslash-C,

              AS_HELP_STRING([--enable-never-backslash-C],

                             [use of \C causes an error]),

              , enable_never_backslash_C=no)

# Handle --enable-ebcdic

AC_ARG_ENABLE(ebcdic,

              AS_HELP_STRING([--enable-ebcdic],

                             [assume EBCDIC coding rather than ASCII; incompatible with --enable-utf; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),

              , enable_ebcdic=no)

# Handle --enable-ebcdic-nl25

AC_ARG_ENABLE(ebcdic-nl25,

              AS_HELP_STRING([--enable-ebcdic-nl25],

                             [set EBCDIC code for NL to 0x25 instead of 0x15; it implies --enable-ebcdic]),

              , enable_ebcdic_nl25=no)

# Handle --enable-pcre2grep-libz

AC_ARG_ENABLE(pcre2grep-libz,

              AS_HELP_STRING([--enable-pcre2grep-libz],

                             [link pcre2grep with libz to handle .gz files]),

              , enable_pcre2grep_libz=no)

# Handle --enable-pcre2grep-libbz2

AC_ARG_ENABLE(pcre2grep-libbz2,

              AS_HELP_STRING([--enable-pcre2grep-libbz2],

                             [link pcre2grep with libbz2 to handle .bz2 files]),

              , enable_pcre2grep_libbz2=no)

# Handle --with-pcre2grep-bufsize=N

AC_ARG_WITH(pcre2grep-bufsize,

              AS_HELP_STRING([--with-pcre2grep-bufsize=N],

                             [pcre2grep initial buffer size (default=20480, minimum=8192)]),

              , with_pcre2grep_bufsize=20480)

# Handle --with-pcre2grep-max-bufsize=N

AC_ARG_WITH(pcre2grep-max-bufsize,

              AS_HELP_STRING([--with-pcre2grep-max-bufsize=N],

                             [pcre2grep maximum buffer size (default=1048576, minimum=8192)]),

              , with_pcre2grep_max_bufsize=1048576)

# Handle --enable-pcre2test-libedit

AC_ARG_ENABLE(pcre2test-libedit,

              AS_HELP_STRING([--enable-pcre2test-libedit],

                             [link pcre2test with libedit]),

              , enable_pcre2test_libedit=no)

# Handle --enable-pcre2test-libreadline

AC_ARG_ENABLE(pcre2test-libreadline,

              AS_HELP_STRING([--enable-pcre2test-libreadline],

                             [link pcre2test with libreadline]),

              , enable_pcre2test_libreadline=no)

# Handle --with-link-size=N

AC_ARG_WITH(link-size,

            AS_HELP_STRING([--with-link-size=N],

                           [internal link size (2, 3, or 4 allowed; default=2)]),

            , with_link_size=2)

# Handle --with-parens-nest-limit=N

AC_ARG_WITH(parens-nest-limit,

            AS_HELP_STRING([--with-parens-nest-limit=N],

                           [nested parentheses limit (default=250)]),

            , with_parens_nest_limit=250)

# Handle --with-heap-limit

AC_ARG_WITH(heap-limit,

            AS_HELP_STRING([--with-heap-limit=N],

                           [default limit on heap memory (kibibytes, default=20000000)]),

            , with_heap_limit=20000000)

# Handle --with-match-limit=N

AC_ARG_WITH(match-limit,

            AS_HELP_STRING([--with-match-limit=N],

                           [default limit on internal looping (default=10000000)]),

            , with_match_limit=10000000)

# Handle --with-match-limit-depth=N

# Recognize old synonym --with-match-limit-recursion

#

# Note: In config.h, the default is to define MATCH_LIMIT_DEPTH symbolically as

# MATCH_LIMIT, which in turn is defined to be some numeric value (e.g.

# 10000000). MATCH_LIMIT_DEPTH can otherwise be set to some different numeric

# value (or even the same numeric value as MATCH_LIMIT, though no longer

# defined in terms of the latter).

#

AC_ARG_WITH(match-limit-depth,

            AS_HELP_STRING([--with-match-limit-depth=N],

                           [default limit on match tree depth (default=MATCH_LIMIT)]),

            , with_match_limit_depth=MATCH_LIMIT)

AC_ARG_WITH(match-limit-recursion,,

            , with_match_limit_recursion=UNSET)

# Handle --enable-valgrind

AC_ARG_ENABLE(valgrind,

              AS_HELP_STRING([--enable-valgrind],

                             [enable valgrind support]),

              , enable_valgrind=no)

# Enable code coverage reports using gcov

AC_ARG_ENABLE(coverage,

              AS_HELP_STRING([--enable-coverage],

                             [enable code coverage reports using gcov]),

              , enable_coverage=no)

# Handle --enable-fuzz-support

AC_ARG_ENABLE(fuzz_support,

              AS_HELP_STRING([--enable-fuzz-support],

                             [enable fuzzer support]),

              , enable_fuzz_support=no)

# Handle --disable-stack-for-recursion

# This option became obsolete at release 10.30.

AC_ARG_ENABLE(stack-for-recursion,,

              , enable_stack_for_recursion=yes)

# Original code

# AC_ARG_ENABLE(stack-for-recursion,

#               AS_HELP_STRING([--disable-stack-for-recursion],

#                              [don't use stack recursion when matching]),

#               , enable_stack_for_recursion=yes)

# Set the default value for pcre2-8

if test "x$enable_pcre2_8" = "xunset"

then

  enable_pcre2_8=yes

fi

# Set the default value for pcre2-16

if test "x$enable_pcre2_16" = "xunset"

then

  enable_pcre2_16=no

fi

# Set the default value for pcre2-32

if test "x$enable_pcre2_32" = "xunset"

then

  enable_pcre2_32=no

fi

# Make sure at least one library is selected

if test "x$enable_pcre2_8$enable_pcre2_16$enable_pcre2_32" = "xnonono"

then

  AC_MSG_ERROR([At least one of the 8, 16 or 32 bit libraries must be enabled])

fi

# Unicode is enabled by default.

if test "x$enable_unicode" = "xunset"

then

  enable_unicode=yes

fi

# Convert the newline identifier into the appropriate integer value. These must

# agree with the PCRE2_NEWLINE_xxx values in pcre2.h.

case "$enable_newline" in

  cr)      ac_pcre2_newline_value=1 ;;

  lf)      ac_pcre2_newline_value=2 ;;

  crlf)    ac_pcre2_newline_value=3 ;;

  any)     ac_pcre2_newline_value=4 ;;

  anycrlf) ac_pcre2_newline_value=5 ;;

  nul)     ac_pcre2_newline_value=6 ;;

  *)

  AC_MSG_ERROR([invalid argument \"$enable_newline\" to --enable-newline option])

  ;;

esac

# --enable-ebcdic-nl25 implies --enable-ebcdic

if test "x$enable_ebcdic_nl25" = "xyes"; then

  enable_ebcdic=yes

fi

# Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.

# Also check that UTF support is not requested, because PCRE2 cannot handle

# EBCDIC and UTF in the same build. To do so it would need to use different

# character constants depending on the mode. Also, EBCDIC cannot be used with

# 16-bit and 32-bit libraries.

#

if test "x$enable_ebcdic" = "xyes"; then

  enable_rebuild_chartables=yes

  if test "x$enable_unicode" = "xyes"; then

    AC_MSG_ERROR([support for EBCDIC and Unicode cannot be enabled at the same time])

  fi

  if test "x$enable_pcre2_16" = "xyes" -o "x$enable_pcre2_32" = "xyes"; then

    AC_MSG_ERROR([EBCDIC support is available only for the 8-bit library])

  fi

fi

# Check argument to --with-link-size

case "$with_link_size" in

  2|3|4) ;;

  *)

  AC_MSG_ERROR([invalid argument \"$with_link_size\" to --with-link-size option])

  ;;

esac

AH_TOP([

/* PCRE2 is written in Standard C, but there are a few non-standard things it

can cope with, allowing it to run on SunOS4 and other "close to standard"

systems.

In environments that support the GNU autotools, config.h.in is converted into

config.h by the "configure" script. In environments that use CMake,

config-cmake.in is converted into config.h. If you are going to build PCRE2 "by

hand" without using "configure" or CMake, you should copy the distributed

config.h.generic to config.h, and edit the macro definitions to be the way you

need them. You must then add -DHAVE_CONFIG_H to all of your compile commands,

so that config.h is included at the start of every source.

Alternatively, you can avoid editing by using -D on the compiler command line

to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H,

but if you do, default values will be taken from config.h for non-boolean

macros that are not defined on the command line.

Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be

defined (conventionally to 1) for TRUE, and not defined at all for FALSE. All

such macros are listed as a commented #undef in config.h.generic. Macros such

as MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are

surrounded by #ifndef/#endif lines so that the value can be overridden by -D.

PCRE2 uses memmove() if HAVE_MEMMOVE is defined; otherwise it uses bcopy() if

HAVE_BCOPY is defined. If your system has neither bcopy() nor memmove(), make

sure both macros are undefined; an emulation function will then be used. */])

# Checks for header files.

AC_HEADER_STDC

AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h)

AC_CHECK_HEADERS([windows.h], [HAVE_WINDOWS_H=1])

AC_CHECK_HEADERS([sys/wait.h], [HAVE_SYS_WAIT_H=1])

AC_CHECK_HEADERS([stdint.h], [PCRE2_HAVE_STDINT_H=1], [PCRE2_HAVE_STDINT_H=0])

AC_CHECK_HEADERS([inttypes.h], [PCRE2_HAVE_INTTYPES_H=1], [PCRE2_HAVE_INTTYPES_H=0])

AC_SUBST([PCRE2_HAVE_STDINT_H])

AC_SUBST([PCRE2_HAVE_INTTYPES_H])

# Conditional compilation

AM_CONDITIONAL(WITH_PCRE2_8, test "x$enable_pcre2_8" = "xyes")

AM_CONDITIONAL(WITH_PCRE2_16, test "x$enable_pcre2_16" = "xyes")

AM_CONDITIONAL(WITH_PCRE2_32, test "x$enable_pcre2_32" = "xyes")

AM_CONDITIONAL(WITH_DEBUG, test "x$enable_debug" = "xyes")

AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")

AM_CONDITIONAL(WITH_JIT, test "x$enable_jit" = "xyes")

AM_CONDITIONAL(WITH_UNICODE, test "x$enable_unicode" = "xyes")

AM_CONDITIONAL(WITH_VALGRIND, test "x$enable_valgrind" = "xyes")

AM_CONDITIONAL(WITH_FUZZ_SUPPORT, test "x$enable_fuzz_support" = "xyes")

if test "$enable_fuzz_support" = "yes" -a "$enable_pcre2_8" = "no"; then

  echo "** ERROR: Fuzzer support requires the 8-bit library"

  exit 1

fi

# Checks for typedefs, structures, and compiler characteristics.

AC_C_CONST

AC_TYPE_SIZE_T

# Checks for library functions.

AC_CHECK_FUNCS(bcopy memmove strerror mkostemp secure_getenv)

# Check for the availability of libz (aka zlib)

AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])

AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])

# Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,

# as for libz. However, this had the following problem, diagnosed and fixed by

# a user:

#

#   - libbz2 uses the Pascal calling convention (WINAPI) for the functions

#     under Win32.

#   - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",

#     therefore missing the function definition.

#   - The compiler thus generates a "C" signature for the test function.

#   - The linker fails to find the "C" function.

#   - PCRE2 fails to configure if asked to do so against libbz2.

#

# Solution:

#

#   - Replace the AC_CHECK_LIB test with a custom test.

AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])

# Original test

# AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])

#

# Custom test follows

AC_MSG_CHECKING([for libbz2])

OLD_LIBS="$LIBS"

LIBS="$LIBS -lbz2"

AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#ifdef HAVE_BZLIB_H

#include <bzlib.h>

#endif]],

[[return (int)BZ2_bzopen("conftest", "rb");]])],

[AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],

AC_MSG_RESULT([no]))

LIBS="$OLD_LIBS"

# Check for the availabiity of libreadline

if test "$enable_pcre2test_libreadline" = "yes"; then

 AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])

 AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])

 AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lreadline"],

   [unset ac_cv_lib_readline_readline;

    AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-ltinfo"],

     [unset ac_cv_lib_readline_readline;

      AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lcurses"],

       [unset ac_cv_lib_readline_readline;

        AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lncurses"],

         [unset ac_cv_lib_readline_readline;

	  AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lncursesw"],

           [unset ac_cv_lib_readline_readline;

	    AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-ltermcap"],

             [LIBREADLINE=""],

             [-ltermcap])],

           [-lncursesw])],

         [-lncurses])],

       [-lcurses])],

     [-ltinfo])])

 AC_SUBST(LIBREADLINE)

 if test -n "$LIBREADLINE"; then

   if test "$LIBREADLINE" != "-lreadline"; then

     echo "-lreadline needs $LIBREADLINE"

     LIBREADLINE="-lreadline $LIBREADLINE"

   fi

 fi

fi

# Check for the availability of libedit. Different distributions put its

# headers in different places. Try to cover the most common ones.

if test "$enable_pcre2test_libedit" = "yes"; then

  AC_CHECK_HEADERS([editline/readline.h], [HAVE_EDITLINE_READLINE_H=1],

    [AC_CHECK_HEADERS([edit/readline/readline.h], [HAVE_READLINE_READLINE_H=1],

      [AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_READLINE_H=1])])])

  AC_CHECK_LIB([edit], [readline], [LIBEDIT="-ledit"])

fi

PCRE2_STATIC_CFLAG=""

if test "x$enable_shared" = "xno" ; then

  AC_DEFINE([PCRE2_STATIC], [1], [

    Define to any value if linking statically (TODO: make nice with Libtool)])

  PCRE2_STATIC_CFLAG="-DPCRE2_STATIC"

fi

AC_SUBST(PCRE2_STATIC_CFLAG)

# Here is where PCRE2-specific defines are handled

if test "$enable_pcre2_8" = "yes"; then

  AC_DEFINE([SUPPORT_PCRE2_8], [], [

    Define to any value to enable the 8 bit PCRE2 library.])

fi

if test "$enable_pcre2_16" = "yes"; then

  AC_DEFINE([SUPPORT_PCRE2_16], [], [

    Define to any value to enable the 16 bit PCRE2 library.])

fi

if test "$enable_pcre2_32" = "yes"; then

  AC_DEFINE([SUPPORT_PCRE2_32], [], [

    Define to any value to enable the 32 bit PCRE2 library.])

fi

if test "$enable_debug" = "yes"; then

  AC_DEFINE([PCRE2_DEBUG], [], [

    Define to any value to include debugging code.])

fi

# Unless running under Windows, JIT support requires pthreads.

if test "$enable_jit" = "yes"; then

  if test "$HAVE_WINDOWS_H" != "1"; then

    AX_PTHREAD([], [AC_MSG_ERROR([JIT support requires pthreads])])

    CC="$PTHREAD_CC"

    CFLAGS="$PTHREAD_CFLAGS $CFLAGS"

    LIBS="$PTHREAD_LIBS $LIBS"

  fi

  AC_DEFINE([SUPPORT_JIT], [], [

    Define to any value to enable support for Just-In-Time compiling.])

else

  enable_pcre2grep_jit="no"

fi

if test "$enable_jit_sealloc" = "yes"; then

  AC_DEFINE([SLJIT_PROT_EXECUTABLE_ALLOCATOR], [1], [

    Define to any non-zero number to enable support for SELinux

    compatible executable memory allocator in JIT. Note that this

    will have no effect unless SUPPORT_JIT is also defined.])

fi

if test "$enable_pcre2grep_jit" = "yes"; then

  AC_DEFINE([SUPPORT_PCRE2GREP_JIT], [], [

    Define to any value to enable JIT support in pcre2grep. Note that this will

    have no effect unless SUPPORT_JIT is also defined.])

fi

if test "$enable_pcre2grep_callout" = "yes"; then

  if test "$HAVE_WINDOWS_H" != "1"; then

    if test "$HAVE_SYS_WAIT_H" != "1"; then

      AC_MSG_ERROR([Callout script support needs sys/wait.h.])

    fi

  fi

  AC_DEFINE([SUPPORT_PCRE2GREP_CALLOUT], [], [

    Define to any value to enable callout script support in pcre2grep.])

fi

if test "$enable_unicode" = "yes"; then

  AC_DEFINE([SUPPORT_UNICODE], [], [

    Define to any value to enable support for Unicode and UTF encoding.

    This will work even in an EBCDIC environment, but it is incompatible

    with the EBCDIC macro. That is, PCRE2 can support *either* EBCDIC

    code *or* ASCII/Unicode, but not both at once.])

fi

if test "$enable_pcre2grep_libz" = "yes"; then

  AC_DEFINE([SUPPORT_LIBZ], [], [

    Define to any value to allow pcre2grep to be linked with libz, so that it is

    able to handle .gz files.])

fi

if test "$enable_pcre2grep_libbz2" = "yes"; then

  AC_DEFINE([SUPPORT_LIBBZ2], [], [

    Define to any value to allow pcre2grep to be linked with libbz2, so that it

    is able to handle .bz2 files.])

fi

if test $with_pcre2grep_bufsize -lt 8192 ; then

  AC_MSG_WARN([$with_pcre2grep_bufsize is too small for --with-pcre2grep-bufsize; using 8192])

  with_pcre2grep_bufsize="8192"

else

  if test $? -gt 1 ; then

  AC_MSG_ERROR([Bad value for --with-pcre2grep-bufsize])

  fi

fi

if test $with_pcre2grep_max_bufsize -lt $with_pcre2grep_bufsize ; then

  with_pcre2grep_max_bufsize="$with_pcre2grep_bufsize"

else

  if test $? -gt 1 ; then

  AC_MSG_ERROR([Bad value for --with-pcre2grep-max-bufsize])

  fi

fi

AC_DEFINE_UNQUOTED([PCRE2GREP_BUFSIZE], [$with_pcre2grep_bufsize], [

  The value of PCRE2GREP_BUFSIZE is the starting size of the buffer used by

  pcre2grep to hold parts of the file it is searching. The buffer will be

  expanded up to PCRE2GREP_MAX_BUFSIZE if necessary, for files containing very

  long lines. The actual amount of memory used by pcre2grep is three times this

  number, because it allows for the buffering of "before" and "after" lines.])

AC_DEFINE_UNQUOTED([PCRE2GREP_MAX_BUFSIZE], [$with_pcre2grep_max_bufsize], [

  The value of PCRE2GREP_MAX_BUFSIZE specifies the maximum size of the buffer

  used by pcre2grep to hold parts of the file it is searching. The actual

  amount of memory used by pcre2grep is three times this number, because it

  allows for the buffering of "before" and "after" lines.])

if test "$enable_pcre2test_libedit" = "yes"; then

  AC_DEFINE([SUPPORT_LIBEDIT], [], [

    Define to any value to allow pcre2test to be linked with libedit.])

  LIBREADLINE="$LIBEDIT"

elif test "$enable_pcre2test_libreadline" = "yes"; then

  AC_DEFINE([SUPPORT_LIBREADLINE], [], [

    Define to any value to allow pcre2test to be linked with libreadline.])

fi

AC_DEFINE_UNQUOTED([NEWLINE_DEFAULT], [$ac_pcre2_newline_value], [

  The value of NEWLINE_DEFAULT determines the default newline character

  sequence. PCRE2 client programs can override this by selecting other values

  at run time. The valid values are 1 (CR), 2 (LF), 3 (CRLF), 4 (ANY),

  5 (ANYCRLF), and 6 (NUL).])

if test "$enable_bsr_anycrlf" = "yes"; then

  AC_DEFINE([BSR_ANYCRLF], [], [

    By default, the \R escape sequence matches any Unicode line ending

    character or sequence of characters. If BSR_ANYCRLF is defined (to any

    value), this is changed so that backslash-R matches only CR, LF, or CRLF.

    The build-time default can be overridden by the user of PCRE2 at runtime.])

fi

if test "$enable_never_backslash_C" = "yes"; then

  AC_DEFINE([NEVER_BACKSLASH_C], [], [

    Defining NEVER_BACKSLASH_C locks out the use of \C in all patterns.])

fi

AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [

  The value of LINK_SIZE determines the number of bytes used to store

  links as offsets within the compiled regex. The default is 2, which

  allows for compiled patterns up to 65535 code units long. This covers the

  vast majority of cases. However, PCRE2 can also be compiled to use 3 or 4

  bytes instead. This allows for longer patterns in extreme cases.])

AC_DEFINE_UNQUOTED([PARENS_NEST_LIMIT], [$with_parens_nest_limit], [

  The value of PARENS_NEST_LIMIT specifies the maximum depth of nested

  parentheses (of any kind) in a pattern. This limits the amount of system

  stack that is used while compiling a pattern.])

AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [

  The value of MATCH_LIMIT determines the default number of times the

  pcre2_match() function can record a backtrack position during a single

  matching attempt. The value is also used to limit a loop counter in

  pcre2_dfa_match(). There is a runtime interface for setting a different

  limit. The limit exists in order to catch runaway regular expressions that

  take for ever to determine that they do not match. The default is set very

  large so that it does not accidentally catch legitimate cases.])

# --with-match-limit-recursion is an obsolete synonym for --with-match-limit-depth

if test "$with_match_limit_recursion" != "UNSET"; then

cat <

WARNING: --with-match-limit-recursion is an obsolete option. Please use

  --with-match-limit-depth in future. If both are set, --with-match-limit-depth

  will be used. See also --with-heap-limit.

EOF

if test "$with_match_limit_depth" = "MATCH_LIMIT"; then

  with_match_limit_depth=$with_match_limit_recursion

fi

fi

AC_DEFINE_UNQUOTED([MATCH_LIMIT_DEPTH], [$with_match_limit_depth], [

  The above limit applies to all backtracks, whether or not they are nested. In

  some environments it is desirable to limit the nesting of backtracking (that

  is, the depth of tree that is searched) more strictly, in order to restrict

  the maximum amount of heap memory that is used. The value of

  MATCH_LIMIT_DEPTH provides this facility. To have any useful effect, it must

  be less than the value of MATCH_LIMIT. The default is to use the same value

  as MATCH_LIMIT. There is a runtime method for setting a different limit. In

  the case of pcre2_dfa_match(), this limit controls the depth of the internal

  nested function calls that are used for pattern recursions, lookarounds, and

  atomic groups.])

AC_DEFINE_UNQUOTED([HEAP_LIMIT], [$with_heap_limit], [

  This limits the amount of memory that may be used while matching

  a pattern. It applies to both pcre2_match() and pcre2_dfa_match(). It does

  not apply to JIT matching. The value is in kibibytes (units of 1024 bytes).])

AC_DEFINE([MAX_NAME_SIZE], [32], [

  This limit is parameterized just in case anybody ever wants to

  change it. Care must be taken if it is increased, because it guards

  against integer overflow caused by enormously large patterns.])

AC_DEFINE([MAX_NAME_COUNT], [10000], [

  This limit is parameterized just in case anybody ever wants to

  change it. Care must be taken if it is increased, because it guards

  against integer overflow caused by enormously large patterns.])

AH_VERBATIM([PCRE2_EXP_DEFN], [

/* If you are compiling for a system other than a Unix-like system or

   Win32, and it needs some magic to be inserted before the definition

   of a function that is exported by the library, define this macro to

   contain the relevant magic. If you do not define this macro, a suitable

    __declspec value is used for Windows systems; in other environments

   "extern" is used for a C compiler and "extern C" for a C++ compiler.

   This macro apears at the start of every exported function that is part

   of the external API. It does not appear on functions that are "external"

   in the C sense, but which are internal to the library. */

#undef PCRE2_EXP_DEFN])

if test "$enable_ebcdic" = "yes"; then

  AC_DEFINE_UNQUOTED([EBCDIC], [], [

    If you are compiling for a system that uses EBCDIC instead of ASCII

    character codes, define this macro to any value. When EBCDIC is set, PCRE2

    assumes that all input strings are in EBCDIC. If you do not define this

    macro, PCRE2 will assume input strings are ASCII or UTF-8/16/32 Unicode. It

    is not possible to build a version of PCRE2 that supports both EBCDIC and

    UTF-8/16/32.])

fi

if test "$enable_ebcdic_nl25" = "yes"; then

  AC_DEFINE_UNQUOTED([EBCDIC_NL25], [], [

    In an EBCDIC environment, define this macro to any value to arrange for

    the NL character to be 0x25 instead of the default 0x15. NL plays the role

    that LF does in an ASCII/Unicode environment.])

fi

if test "$enable_valgrind" = "yes"; then

  AC_DEFINE_UNQUOTED([SUPPORT_VALGRIND], [], [

     Define to any value for valgrind support to find invalid memory reads.])

fi

# Platform specific issues

NO_UNDEFINED=

EXPORT_ALL_SYMBOLS=

case $host_os in

  cygwin* | mingw* )

    if test X"$enable_shared" = Xyes; then

      NO_UNDEFINED="-no-undefined"

      EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"

    fi

    ;;

esac

# The extra LDFLAGS for each particular library. The libpcre2*_version values

# are m4 variables, assigned above.

EXTRA_LIBPCRE2_8_LDFLAGS="$EXTRA_LIBPCRE2_8_LDFLAGS \

  $NO_UNDEFINED -version-info libpcre2_8_version"

EXTRA_LIBPCRE2_16_LDFLAGS="$EXTRA_LIBPCRE2_16_LDFLAGS \

  $NO_UNDEFINED -version-info libpcre2_16_version"

EXTRA_LIBPCRE2_32_LDFLAGS="$EXTRA_LIBPCRE2_32_LDFLAGS \

  $NO_UNDEFINED -version-info libpcre2_32_version"

EXTRA_LIBPCRE2_POSIX_LDFLAGS="$EXTRA_LIBPCRE2_POSIX_LDFLAGS \

  $NO_UNDEFINED -version-info libpcre2_posix_version"

AC_SUBST(EXTRA_LIBPCRE2_8_LDFLAGS)

AC_SUBST(EXTRA_LIBPCRE2_16_LDFLAGS)

AC_SUBST(EXTRA_LIBPCRE2_32_LDFLAGS)

AC_SUBST(EXTRA_LIBPCRE2_POSIX_LDFLAGS)

# When we run 'make distcheck', use these arguments. Turning off compiler

# optimization makes it run faster.

DISTCHECK_CONFIGURE_FLAGS="CFLAGS='' CXXFLAGS='' --enable-pcre2-16 --enable-pcre2-32 --enable-jit"

AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)

# Check that, if --enable-pcre2grep-libz or --enable-pcre2grep-libbz2 is

# specified, the relevant library is available.

if test "$enable_pcre2grep_libz" = "yes"; then

  if test "$HAVE_ZLIB_H" != "1"; then

    echo "** Cannot --enable-pcre2grep-libz because zlib.h was not found"

    exit 1

  fi

  if test "$HAVE_LIBZ" != "1"; then

    echo "** Cannot --enable-pcre2grep-libz because libz was not found"

    exit 1

  fi

  LIBZ="-lz"

fi

AC_SUBST(LIBZ)

if test "$enable_pcre2grep_libbz2" = "yes"; then

  if test "$HAVE_BZLIB_H" != "1"; then

    echo "** Cannot --enable-pcre2grep-libbz2 because bzlib.h was not found"

    exit 1

  fi

  if test "$HAVE_LIBBZ2" != "1"; then

    echo "** Cannot --enable-pcre2grep-libbz2 because libbz2 was not found"

    exit 1

  fi

  LIBBZ2="-lbz2"

fi

AC_SUBST(LIBBZ2)

# Similarly for --enable-pcre2test-readline

if test "$enable_pcre2test_libedit" = "yes"; then

  if test "$enable_pcre2test_libreadline" = "yes"; then

    echo "** Cannot use both --enable-pcre2test-libedit and --enable-pcre2test-readline"

    exit 1

  fi