contrib/dialog/aclocal.m4

dnl macros used for DIALOG configure script
dnl $Id: aclocal.m4,v 1.82 2011/06/28 22:48:31 tom Exp $
dnl ---------------------------------------------------------------------------
dnl Copyright 1999-2010,2011 -- Thomas E. Dickey
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the
dnl "Software"), to deal in the Software without restriction, including
dnl without limitation the rights to use, copy, modify, merge, publish,
dnl distribute, distribute with modifications, sublicense, and/or sell
dnl copies of the Software, and to permit persons to whom the Software is
dnl furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice shall be included
dnl in all copies or portions of the Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
dnl IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
dnl THE USE OR OTHER DEALINGS IN THE SOFTWARE.
dnl
dnl Except as contained in this notice, the name(s) of the above copyright
dnl holders shall not be used in advertising or otherwise to promote the
dnl sale, use or other dealings in this Software without prior written
dnl authorization.
dnl
dnl see
dnl http://invisible-island.net/autoconf/
dnl ---------------------------------------------------------------------------
dnl ---------------------------------------------------------------------------
dnl AM_GNU_GETTEXT version: 12 updated: 2010/06/19 07:02:11
dnl --------------
dnl Usage: Just like AM_WITH_NLS, which see.
AC_DEFUN([AM_GNU_GETTEXT],
  [AC_REQUIRE([AC_PROG_MAKE_SET])dnl
   AC_REQUIRE([AC_PROG_CC])dnl
   AC_REQUIRE([AC_CANONICAL_HOST])dnl
   AC_REQUIRE([AC_PROG_RANLIB])dnl
   AC_REQUIRE([AC_ISC_POSIX])dnl
   AC_REQUIRE([AC_HEADER_STDC])dnl
   AC_REQUIRE([AC_C_CONST])dnl
   AC_REQUIRE([AC_C_INLINE])dnl
   AC_REQUIRE([AC_TYPE_OFF_T])dnl
   AC_REQUIRE([AC_TYPE_SIZE_T])dnl
   AC_REQUIRE([AC_FUNC_ALLOCA])dnl
   AC_REQUIRE([AC_FUNC_MMAP])dnl
   AC_REQUIRE([jm_GLIBC21])dnl

   AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
stdlib.h string.h unistd.h sys/param.h])
   AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getcwd getegid geteuid \
getgid getuid mempcpy munmap putenv setenv setlocale stpcpy strchr strcasecmp \
strdup strtoul tsearch __argz_count __argz_stringify __argz_next])

   AM_ICONV
   AM_LANGINFO_CODESET
   AM_LC_MESSAGES
   AM_WITH_NLS([$1],[$2],[$3],[$4])

   if test "x$CATOBJEXT" != "x"; then
     if test "x$ALL_LINGUAS" = "x"; then
       LINGUAS=
     else
       AC_MSG_CHECKING(for catalogs to be installed)
       NEW_LINGUAS=
       for presentlang in $ALL_LINGUAS; do
         useit=no
         for desiredlang in ${LINGUAS-$ALL_LINGUAS}; do
           # Use the presentlang catalog if desiredlang is
           #   a. equal to presentlang, or
           #   b. a variant of presentlang (because in this case,
           #      presentlang can be used as a fallback for messages
           #      which are not translated in the desiredlang catalog).
           case "$desiredlang" in
             "$presentlang"*) useit=yes;;
           esac
         done
         if test $useit = yes; then
           NEW_LINGUAS="$NEW_LINGUAS $presentlang"
         fi
       done
       LINGUAS=$NEW_LINGUAS
       AC_MSG_RESULT($LINGUAS)
     fi

     dnl Construct list of names of catalog files to be constructed.
     if test -n "$LINGUAS"; then
       for lang in $LINGUAS; do CATALOGS="$CATALOGS $lang$CATOBJEXT"; done
     fi
   fi

   dnl Enable libtool support if the surrounding package wishes it.
   INTL_LIBTOOL_SUFFIX_PREFIX=ifelse([$1], use-libtool, [l], [])
   AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
])dnl
dnl ---------------------------------------------------------------------------
dnl AM_ICONV version: 12 updated: 2007/07/30 19:12:03
dnl --------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl iconv.m4
dnl ====================
dnl serial AM2
dnl
dnl From Bruno Haible.
dnl
dnl ====================
dnl Modified to use CF_FIND_LINKAGE and CF_ADD_SEARCHPATH, to broaden the
dnl range of locations searched.  Retain the same cache-variable naming to
dnl allow reuse with the other gettext macros -Thomas E Dickey
AC_DEFUN([AM_ICONV],
[
  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
  dnl those with the standalone portable GNU libiconv installed).

  AC_ARG_WITH([libiconv-prefix],
[  --with-libiconv-prefix=DIR
                          search for libiconv in DIR/include and DIR/lib], [
    CF_ADD_OPTIONAL_PATH($withval, libiconv)
   ])

  AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
    CF_FIND_LINKAGE(CF__ICONV_HEAD,
      CF__ICONV_BODY,
      iconv,
      am_cv_func_iconv=yes,
      am_cv_func_iconv=["no, consider installing GNU libiconv"])])

  if test "$am_cv_func_iconv" = yes; then
    AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])

    AC_CACHE_CHECK([if the declaration of iconv() needs const.],
		   am_cv_proto_iconv_const,[
      AC_TRY_COMPILE(CF__ICONV_HEAD [
extern
#ifdef __cplusplus
"C"
#endif
#if defined(__STDC__) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
#else
size_t iconv();
#endif
],[], am_cv_proto_iconv_const=no,
      am_cv_proto_iconv_const=yes)])

    if test "$am_cv_proto_iconv_const" = yes ; then
      am_cv_proto_iconv_arg1="const"
    else
      am_cv_proto_iconv_arg1=""
    fi

    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
      [Define as const if the declaration of iconv() needs const.])
  fi

  LIBICONV=
  if test "$cf_cv_find_linkage_iconv" = yes; then
    CF_ADD_INCDIR($cf_cv_header_path_iconv)
    if test -n "$cf_cv_library_file_iconv" ; then
      LIBICONV="-liconv"
      CF_ADD_LIBDIR($cf_cv_library_path_iconv)
    fi
  fi

  AC_SUBST(LIBICONV)
])dnl
dnl ---------------------------------------------------------------------------
dnl AM_LANGINFO_CODESET version: 3 updated: 2002/10/27 23:21:42
dnl -------------------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl codeset.m4
dnl ====================
dnl serial AM1
dnl
dnl From Bruno Haible.
AC_DEFUN([AM_LANGINFO_CODESET],
[
  AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
    [AC_TRY_LINK([#include <langinfo.h>],
      [char* cs = nl_langinfo(CODESET);],
      am_cv_langinfo_codeset=yes,
      am_cv_langinfo_codeset=no)
    ])
  if test $am_cv_langinfo_codeset = yes; then
    AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
      [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
  fi
])dnl
dnl ---------------------------------------------------------------------------
dnl AM_LC_MESSAGES version: 4 updated: 2002/10/27 23:21:42
dnl --------------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl lcmessage.m4
dnl ====================
dnl Check whether LC_MESSAGES is available in <locale.h>.
dnl Ulrich Drepper <drepper@cygnus.com>, 1995.
dnl
dnl This file can be copied and used freely without restrictions.  It can
dnl be used in projects which are not available under the GNU General Public
dnl License or the GNU Library General Public License but which still want
dnl to provide support for the GNU gettext functionality.
dnl Please note that the actual code of the GNU gettext library is covered
dnl by the GNU Library General Public License, and the rest of the GNU
dnl gettext package package is covered by the GNU General Public License.
dnl They are *not* in the public domain.
dnl
dnl serial 2
dnl
AC_DEFUN([AM_LC_MESSAGES],
  [if test $ac_cv_header_locale_h = yes; then
    AC_CACHE_CHECK([for LC_MESSAGES], am_cv_val_LC_MESSAGES,
      [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
       am_cv_val_LC_MESSAGES=yes, am_cv_val_LC_MESSAGES=no)])
    if test $am_cv_val_LC_MESSAGES = yes; then
      AC_DEFINE(HAVE_LC_MESSAGES, 1,
        [Define if your <locale.h> file defines LC_MESSAGES.])
    fi
  fi])dnl
dnl ---------------------------------------------------------------------------
dnl AM_PATH_PROG_WITH_TEST version: 8 updated: 2009/01/11 20:31:12
dnl ----------------------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl progtest.m4
dnl ====================
dnl Search path for a program which passes the given test.
dnl Ulrich Drepper <drepper@cygnus.com>, 1996.
dnl
dnl This file can be copied and used freely without restrictions.  It can
dnl be used in projects which are not available under the GNU General Public
dnl License or the GNU Library General Public License but which still want
dnl to provide support for the GNU gettext functionality.
dnl Please note that the actual code of the GNU gettext library is covered
dnl by the GNU Library General Public License, and the rest of the GNU
dnl gettext package package is covered by the GNU General Public License.
dnl They are *not* in the public domain.
dnl
dnl serial 2
dnl
dnl AM_PATH_PROG_WITH_TEST(VARIABLE, PROG-TO-CHECK-FOR,
dnl   TEST-PERFORMED-ON-FOUND_PROGRAM [, VALUE-IF-NOT-FOUND [, PATH]])
AC_DEFUN([AM_PATH_PROG_WITH_TEST],
[# Extract the first word of "$2", so it can be a program name with args.
AC_REQUIRE([CF_PATHSEP])
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
AC_CACHE_VAL(ac_cv_path_$1,
[case "[$]$1" in
  [[\\/]*|?:[\\/]]*)
  ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
  ;;
  *)
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR}"
  for ac_dir in ifelse([$5], , $PATH, [$5]); do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/$ac_word$ac_exeext; then
      if [$3]; then
	ac_cv_path_$1="$ac_dir/$ac_word$ac_exeext"
	break
      fi
    fi
  done
  IFS="$ac_save_ifs"
dnl If no 4th arg is given, leave the cache variable unset,
dnl so AC_PATH_PROGS will keep looking.
ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
])dnl
  ;;
esac])dnl
$1="$ac_cv_path_$1"
if test ifelse([$4], , [-n "[$]$1"], ["[$]$1" != "$4"]); then
  AC_MSG_RESULT([$]$1)
else
  AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])dnl
dnl ---------------------------------------------------------------------------
dnl AM_WITH_NLS version: 24 updated: 2010/06/20 09:24:28
dnl -----------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl gettext.m4
dnl ====================
dnl Macro to add for using GNU gettext.
dnl Ulrich Drepper <drepper@cygnus.com>, 1995.
dnl ====================
dnl Modified to use CF_FIND_LINKAGE and CF_ADD_SEARCHPATH, to broaden the
dnl range of locations searched.  Retain the same cache-variable naming to
dnl allow reuse with the other gettext macros -Thomas E Dickey
dnl ====================
dnl
dnl This file can be copied and used freely without restrictions.  It can
dnl be used in projects which are not available under the GNU General Public
dnl License or the GNU Library General Public License but which still want
dnl to provide support for the GNU gettext functionality.
dnl Please note that the actual code of the GNU gettext library is covered
dnl by the GNU Library General Public License, and the rest of the GNU
dnl gettext package package is covered by the GNU General Public License.
dnl They are *not* in the public domain.
dnl
dnl serial 10
dnl
dnl Usage: AM_WITH_NLS([TOOLSYMBOL], [NEEDSYMBOL], [LIBDIR], [ENABLED]).
dnl If TOOLSYMBOL is specified and is 'use-libtool', then a libtool library
dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
dnl    depending on --{enable,disable}-{shared,static} and on the presence of
dnl    AM-DISABLE-SHARED). Otherwise, a static library
dnl    $(top_builddir)/intl/libintl.a will be created.
dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
dnl    implementations (in libc or libintl) without the ngettext() function
dnl    will be ignored.
dnl LIBDIR is used to find the intl libraries.  If empty,
dnl    the value `$(top_builddir)/intl/' is used.
dnl ENABLED is used to control the default for the related --enable-nls, since
dnl    not all application developers want this feature by default, e.g., lynx.
dnl
dnl The result of the configuration is one of three cases:
dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
dnl    and used.
dnl    Catalog format: GNU --> install in $(datadir)
dnl    Catalog extension: .mo after installation, .gmo in source tree
dnl 2) GNU gettext has been found in the system's C library.
dnl    Catalog format: GNU --> install in $(datadir)
dnl    Catalog extension: .mo after installation, .gmo in source tree
dnl 3) No internationalization, always use English msgid.
dnl    Catalog format: none
dnl    Catalog extension: none
dnl The use of .gmo is historical (it was needed to avoid overwriting the
dnl GNU format catalogs when building on a platform with an X/Open gettext),
dnl but we keep it in order not to force irrelevant filename changes on the
dnl maintainers.
dnl
AC_DEFUN([AM_WITH_NLS],
[AC_MSG_CHECKING([whether NLS is requested])
  dnl Default is enabled NLS
  ifelse([$4],,[
  AC_ARG_ENABLE(nls,
    [  --disable-nls           do not use Native Language Support],
    USE_NLS=$enableval, USE_NLS=yes)],[
  AC_ARG_ENABLE(nls,
    [  --enable-nls            use Native Language Support],
    USE_NLS=$enableval, USE_NLS=no)])
  AC_MSG_RESULT($USE_NLS)
  AC_SUBST(USE_NLS)

  BUILD_INCLUDED_LIBINTL=no
  USE_INCLUDED_LIBINTL=no
  INTLLIBS=

  dnl If we use NLS figure out what method
  if test "$USE_NLS" = "yes"; then
    AC_DEFINE(ENABLE_NLS, 1,
      [Define to 1 if translation of program messages to the user's native language
 is requested.])
    AC_MSG_CHECKING([whether included gettext is requested])
    AC_ARG_WITH(included-gettext,
      [  --with-included-gettext use the GNU gettext library included here],
      nls_cv_force_use_gnu_gettext=$withval,
      nls_cv_force_use_gnu_gettext=no)
    AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)

    nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
    if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
      dnl User does not insist on using GNU NLS library.  Figure out what
      dnl to use.  If GNU gettext is available we use this.  Else we have
      dnl to fall back to GNU NLS library.
      CATOBJEXT=NONE

      cf_save_LIBS_1="$LIBS"
      CF_ADD_LIBS($LIBICONV)
      AC_CACHE_CHECK([for libintl.h and gettext()], cf_cv_func_gettext,[
        CF_FIND_LINKAGE(CF__INTL_HEAD,
        CF__INTL_BODY,
        intl,
        cf_cv_func_gettext=yes,
        cf_cv_func_gettext=no)
      ])
      LIBS="$cf_save_LIBS_1"

      if test "$cf_cv_func_gettext" = yes ; then
        AC_DEFINE(HAVE_LIBINTL_H)

        dnl If an already present or preinstalled GNU gettext() is found,
        dnl use it.  But if this macro is used in GNU gettext, and GNU
        dnl gettext is already preinstalled in libintl, we update this
        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
        if test "$PACKAGE" != gettext; then
          AC_DEFINE(HAVE_GETTEXT, 1,
              [Define if the GNU gettext() function is already present or preinstalled.])

          CF_ADD_INCDIR($cf_cv_header_path_intl)

          if test -n "$cf_cv_library_file_intl" ; then
            dnl If iconv() is in a separate libiconv library, then anyone
            dnl linking with libintl{.a,.so} also needs to link with
            dnl libiconv.
            INTLLIBS="$cf_cv_library_file_intl $LIBICONV"
            CF_ADD_LIBDIR($cf_cv_library_path_intl,INTLLIBS)
          fi

          gt_save_LIBS="$LIBS"
          LIBS="$LIBS $INTLLIBS"
          AC_CHECK_FUNCS(dcgettext)
          LIBS="$gt_save_LIBS"

          dnl Search for GNU msgfmt in the PATH.
          AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
              [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
          AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)

          dnl Search for GNU xgettext in the PATH.
          AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
              [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)

          CATOBJEXT=.gmo
        fi
      fi

      if test "$CATOBJEXT" = "NONE"; then
        dnl GNU gettext is not found in the C library.
        dnl Fall back on GNU gettext library.
        nls_cv_use_gnu_gettext=yes
      fi
    fi

    if test "$nls_cv_use_gnu_gettext" = "yes"; then
      if test ! -d $srcdir/intl ; then
        AC_MSG_ERROR(no NLS library is packaged with this application)
      fi
      dnl Mark actions used to generate GNU NLS library.
      INTLOBJS="\$(GETTOBJS)"
      AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
          [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
      AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
      AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
          [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
      AC_SUBST(MSGFMT)
      BUILD_INCLUDED_LIBINTL=yes
      USE_INCLUDED_LIBINTL=yes
      CATOBJEXT=.gmo
      INTLLIBS="ifelse([$3],[],\$(top_builddir)/intl,[$3])/libintl.ifelse([$1], use-libtool, [l], [])a $LIBICONV"
      LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
    fi

    dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
    dnl Test whether we really found GNU msgfmt.
    if test "$GMSGFMT" != ":"; then
      dnl If it is no GNU msgfmt we define it as : so that the
      dnl Makefiles still can work.
      if $GMSGFMT --statistics /dev/null >/dev/null 2>&1; then
        : ;
      else
        AC_MSG_RESULT(
          [found msgfmt program is not GNU msgfmt; ignore it])
        GMSGFMT=":"
      fi
    fi

    dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
    dnl Test whether we really found GNU xgettext.
    if test "$XGETTEXT" != ":"; then
        dnl If it is no GNU xgettext we define it as : so that the
        dnl Makefiles still can work.
      if $XGETTEXT --omit-header /dev/null >/dev/null 2>&1; then
        : ;
      else
        AC_MSG_RESULT(
          [found xgettext program is not GNU xgettext; ignore it])
        XGETTEXT=":"
      fi
    fi

    dnl We need to process the po/ directory.
    POSUB=po
  fi

  AC_OUTPUT_COMMANDS(
   [for ac_file in $CONFIG_FILES; do

      # Support "outfile[:infile[:infile...]]"
      case "$ac_file" in
        *:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
      esac

      # PO directories have a Makefile.in generated from Makefile.inn.
      case "$ac_file" in */[Mm]akefile.in)
        # Adjust a relative srcdir.
        ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
        ac_dir_suffix="/`echo "$ac_dir"|sed 's%^\./%%'`"
        ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
        ac_base=`basename $ac_file .in`
        # In autoconf-2.13 it is called $ac_given_srcdir.
        # In autoconf-2.50 it is called $srcdir.
        test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"

        case "$ac_given_srcdir" in
          .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
          /*) top_srcdir="$ac_given_srcdir" ;;
          *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
        esac

        if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
          rm -f "$ac_dir/POTFILES"
          test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
          sed -e "/^#/d" -e "/^[ 	]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," -e "\$s/\(.*\) \\\\/\1/" < "$ac_given_srcdir/$ac_dir/POTFILES.in" > "$ac_dir/POTFILES"
          test -n "$as_me" && echo "$as_me: creating $ac_dir/$ac_base" || echo "creating $ac_dir/$ac_base"
          sed -e "/POTFILES =/r $ac_dir/POTFILES" "$ac_dir/$ac_base.in" > "$ac_dir/$ac_base"
        fi
        ;;
      esac
    done])

  dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
  dnl to 'yes' because some of the testsuite requires it.
  if test "$PACKAGE" = gettext; then
    BUILD_INCLUDED_LIBINTL=yes
  fi

  dnl intl/plural.c is generated from intl/plural.y. It requires bison,
  dnl because plural.y uses bison specific features. It requires at least
  dnl bison-1.26 because earlier versions generate a plural.c that doesn't
  dnl compile.
  dnl bison is only needed for the maintainer (who touches plural.y). But in
  dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
  dnl the rule in general Makefile. Now, some people carelessly touch the
  dnl files or have a broken "make" program, hence the plural.c rule will
  dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
  dnl present or too old.
  if test "$nls_cv_use_gnu_gettext" = "yes"; then
    AC_CHECK_PROGS([INTLBISON], [bison])
    if test -z "$INTLBISON"; then
      ac_verc_fail=yes
    else
      dnl Found it, now check the version.
      AC_MSG_CHECKING([version of bison])
changequote(<<,>>)dnl
      ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
      case $ac_prog_version in
        '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
        1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
changequote([,])dnl
           ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
        *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
      esac
    AC_MSG_RESULT([$ac_prog_version])
    fi
    if test $ac_verc_fail = yes; then
      INTLBISON=:
    fi
  fi

  dnl These rules are solely for the distribution goal.  While doing this
  dnl we only have to keep exactly one list of the available catalogs
  dnl in configure.in.
  for lang in $ALL_LINGUAS; do
    GMOFILES="$GMOFILES $lang.gmo"
    POFILES="$POFILES $lang.po"
  done

  dnl Make all variables we use known to autoconf.
  AC_SUBST(BUILD_INCLUDED_LIBINTL)
  AC_SUBST(USE_INCLUDED_LIBINTL)
  AC_SUBST(CATALOGS)
  AC_SUBST(CATOBJEXT)
  AC_SUBST(GMOFILES)
  AC_SUBST(INTLLIBS)
  AC_SUBST(INTLOBJS)
  AC_SUBST(POFILES)
  AC_SUBST(POSUB)

  dnl For backward compatibility. Some configure.ins may be using this.
  nls_cv_header_intl=
  nls_cv_header_libgt=

  dnl For backward compatibility. Some Makefiles may be using this.
  DATADIRNAME=share
  AC_SUBST(DATADIRNAME)

  dnl For backward compatibility. Some Makefiles may be using this.
  INSTOBJEXT=.mo
  AC_SUBST(INSTOBJEXT)

  dnl For backward compatibility. Some Makefiles may be using this.
  GENCAT=gencat
  AC_SUBST(GENCAT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_AC_PREREQ version: 2 updated: 1997/09/06 13:24:56
dnl ------------
dnl Conditionally generate script according to whether we're using the release
dnl version of autoconf, or a patched version (using the ternary component as
dnl the patch-version).
define(CF_AC_PREREQ,
[CF_PREREQ_COMPARE(
AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])), [$1], [$2], [$3])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_CFLAGS version: 10 updated: 2010/05/26 05:38:42
dnl -------------
dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
dnl The second parameter if given makes this macro verbose.
dnl
dnl Put any preprocessor definitions that use quoted strings in $EXTRA_CPPFLAGS,
dnl to simplify use of $CPPFLAGS in compiler checks, etc., that are easily
dnl confused by the quotes (which require backslashes to keep them usable).
AC_DEFUN([CF_ADD_CFLAGS],
[
cf_fix_cppflags=no
cf_new_cflags=
cf_new_cppflags=
cf_new_extra_cppflags=

for cf_add_cflags in $1
do
case $cf_fix_cppflags in
no)
	case $cf_add_cflags in #(vi
	-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C) #(vi
		case $cf_add_cflags in
		-D*)
			cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`

			test "${cf_add_cflags}" != "${cf_tst_cflags}" \
				&& test -z "${cf_tst_cflags}" \
				&& cf_fix_cppflags=yes

			if test $cf_fix_cppflags = yes ; then
				cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"
				continue
			elif test "${cf_tst_cflags}" = "\"'" ; then
				cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"
				continue
			fi
			;;
		esac
		case "$CPPFLAGS" in
		*$cf_add_cflags) #(vi
			;;
		*) #(vi
			case $cf_add_cflags in #(vi
			-D*)
				cf_tst_cppflags=`echo "x$cf_add_cflags" | sed -e 's/^...//' -e 's/=.*//'`
				CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,$cf_tst_cppflags)
				;;
			esac
			cf_new_cppflags="$cf_new_cppflags $cf_add_cflags"
			;;
		esac
		;;
	*)
		cf_new_cflags="$cf_new_cflags $cf_add_cflags"
		;;
	esac
	;;
yes)
	cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"

	cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^[[^"]]*"'\''//'`

	test "${cf_add_cflags}" != "${cf_tst_cflags}" \
		&& test -z "${cf_tst_cflags}" \
		&& cf_fix_cppflags=no
	;;
esac
done

if test -n "$cf_new_cflags" ; then
	ifelse([$2],,,[CF_VERBOSE(add to \$CFLAGS $cf_new_cflags)])
	CFLAGS="$CFLAGS $cf_new_cflags"
fi

if test -n "$cf_new_cppflags" ; then
	ifelse([$2],,,[CF_VERBOSE(add to \$CPPFLAGS $cf_new_cppflags)])
	CPPFLAGS="$CPPFLAGS $cf_new_cppflags"
fi

if test -n "$cf_new_extra_cppflags" ; then
	ifelse([$2],,,[CF_VERBOSE(add to \$EXTRA_CPPFLAGS $cf_new_extra_cppflags)])
	EXTRA_CPPFLAGS="$cf_new_extra_cppflags $EXTRA_CPPFLAGS"
fi

AC_SUBST(EXTRA_CPPFLAGS)

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_INCDIR version: 13 updated: 2010/05/26 16:44:57
dnl -------------
dnl Add an include-directory to $CPPFLAGS.  Don't add /usr/include, since it's
dnl redundant.  We don't normally need to add -I/usr/local/include for gcc,
dnl but old versions (and some misinstalled ones) need that.  To make things
dnl worse, gcc 3.x may give error messages if -I/usr/local/include is added to
dnl the include-path).
AC_DEFUN([CF_ADD_INCDIR],
[
if test -n "$1" ; then
  for cf_add_incdir in $1
  do
	while test $cf_add_incdir != /usr/include
	do
	  if test -d $cf_add_incdir
	  then
		cf_have_incdir=no
		if test -n "$CFLAGS$CPPFLAGS" ; then
		  # a loop is needed to ensure we can add subdirs of existing dirs
		  for cf_test_incdir in $CFLAGS $CPPFLAGS ; do
			if test ".$cf_test_incdir" = ".-I$cf_add_incdir" ; then
			  cf_have_incdir=yes; break
			fi
		  done
		fi

		if test "$cf_have_incdir" = no ; then
		  if test "$cf_add_incdir" = /usr/local/include ; then
			if test "$GCC" = yes
			then
			  cf_save_CPPFLAGS=$CPPFLAGS
			  CPPFLAGS="$CPPFLAGS -I$cf_add_incdir"
			  AC_TRY_COMPILE([#include <stdio.h>],
				  [printf("Hello")],
				  [],
				  [cf_have_incdir=yes])
			  CPPFLAGS=$cf_save_CPPFLAGS
			fi
		  fi
		fi

		if test "$cf_have_incdir" = no ; then
		  CF_VERBOSE(adding $cf_add_incdir to include-path)
		  ifelse([$2],,CPPFLAGS,[$2])="$ifelse([$2],,CPPFLAGS,[$2]) -I$cf_add_incdir"

		  cf_top_incdir=`echo $cf_add_incdir | sed -e 's%/include/.*$%/include%'`
		  test "$cf_top_incdir" = "$cf_add_incdir" && break
		  cf_add_incdir="$cf_top_incdir"
		else
		  break
		fi
	  fi
	done
  done
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_LIB version: 2 updated: 2010/06/02 05:03:05
dnl ----------
dnl Add a library, used to enforce consistency.
dnl
dnl $1 = library to add, without the "-l"
dnl $2 = variable to update (default $LIBS)
AC_DEFUN([CF_ADD_LIB],[CF_ADD_LIBS(-l$1,ifelse($2,,LIBS,[$2]))])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_LIBDIR version: 9 updated: 2010/05/26 16:44:57
dnl -------------
dnl	Adds to the library-path
dnl
dnl	Some machines have trouble with multiple -L options.
dnl
dnl $1 is the (list of) directory(s) to add
dnl $2 is the optional name of the variable to update (default LDFLAGS)
dnl
AC_DEFUN([CF_ADD_LIBDIR],
[
if test -n "$1" ; then
  for cf_add_libdir in $1
  do
    if test $cf_add_libdir = /usr/lib ; then
      :
    elif test -d $cf_add_libdir
    then
      cf_have_libdir=no
      if test -n "$LDFLAGS$LIBS" ; then
        # a loop is needed to ensure we can add subdirs of existing dirs
        for cf_test_libdir in $LDFLAGS $LIBS ; do
          if test ".$cf_test_libdir" = ".-L$cf_add_libdir" ; then
            cf_have_libdir=yes; break
          fi
        done
      fi
      if test "$cf_have_libdir" = no ; then
        CF_VERBOSE(adding $cf_add_libdir to library-path)
        ifelse([$2],,LDFLAGS,[$2])="-L$cf_add_libdir $ifelse([$2],,LDFLAGS,[$2])"
      fi
    fi
  done
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_LIBS version: 1 updated: 2010/06/02 05:03:05
dnl -----------
dnl Add one or more libraries, used to enforce consistency.
dnl
dnl $1 = libraries to add, with the "-l", etc.
dnl $2 = variable to update (default $LIBS)
AC_DEFUN([CF_ADD_LIBS],[ifelse($2,,LIBS,[$2])="$1 [$]ifelse($2,,LIBS,[$2])"])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_OPTIONAL_PATH version: 1 updated: 2007/07/29 12:33:33
dnl --------------------
dnl Add an optional search-path to the compile/link variables.
dnl See CF_WITH_PATH
dnl
dnl $1 = shell variable containing the result of --with-XXX=[DIR]
dnl $2 = module to look for.
AC_DEFUN([CF_ADD_OPTIONAL_PATH],[
  case "$1" in #(vi
  no) #(vi
      ;;
  yes) #(vi
      ;;
  *)
      CF_ADD_SEARCHPATH([$1], [AC_MSG_ERROR(cannot find $2 under $1)])
      ;;
  esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_SEARCHPATH version: 5 updated: 2009/01/11 20:40:21
dnl -----------------
dnl Set $CPPFLAGS and $LDFLAGS with the directories given via the parameter.
dnl They can be either the common root of include- and lib-directories, or the
dnl lib-directory (to allow for things like lib64 directories).
dnl See also CF_FIND_LINKAGE.
dnl
dnl $1 is the list of colon-separated directory names to search.
dnl $2 is the action to take if a parameter does not yield a directory.
AC_DEFUN([CF_ADD_SEARCHPATH],
[
AC_REQUIRE([CF_PATHSEP])
for cf_searchpath in `echo "$1" | tr $PATH_SEPARATOR ' '`; do
	if test -d $cf_searchpath/include; then
		CF_ADD_INCDIR($cf_searchpath/include)
	elif test -d $cf_searchpath/../include ; then
		CF_ADD_INCDIR($cf_searchpath/../include)
	ifelse([$2],,,[else
$2])
	fi
	if test -d $cf_searchpath/lib; then
		CF_ADD_LIBDIR($cf_searchpath/lib)
	elif test -d $cf_searchpath ; then
		CF_ADD_LIBDIR($cf_searchpath)
	ifelse([$2],,,[else
$2])
	fi
done
])
dnl ---------------------------------------------------------------------------
dnl CF_ADD_SUBDIR_PATH version: 3 updated: 2010/07/03 20:58:12
dnl ------------------
dnl Append to a search-list for a nonstandard header/lib-file
dnl	$1 = the variable to return as result
dnl	$2 = the package name
dnl	$3 = the subdirectory, e.g., bin, include or lib
dnl $4 = the directory under which we will test for subdirectories
dnl $5 = a directory that we do not want $4 to match
AC_DEFUN([CF_ADD_SUBDIR_PATH],
[
test "$4" != "$5" && \
test -d "$4" && \
ifelse([$5],NONE,,[(test $5 = NONE || test "$4" != "$5") &&]) {
	test -n "$verbose" && echo "	... testing for $3-directories under $4"
	test -d $4/$3 &&          $1="[$]$1 $4/$3"
	test -d $4/$3/$2 &&       $1="[$]$1 $4/$3/$2"
	test -d $4/$3/$2/$3 &&    $1="[$]$1 $4/$3/$2/$3"
	test -d $4/$2/$3 &&       $1="[$]$1 $4/$2/$3"
	test -d $4/$2/$3/$2 &&    $1="[$]$1 $4/$2/$3/$2"
}
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
dnl --------------
dnl Allow user to disable a normally-on option.
AC_DEFUN([CF_ARG_DISABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],yes)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_ENABLE version: 3 updated: 1999/03/30 17:24:31
dnl -------------
dnl Allow user to enable a normally-off option.
AC_DEFUN([CF_ARG_ENABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],no)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_MSG_ENABLE version: 2 updated: 2000/07/29 19:32:03
dnl -----------------
dnl Verbose form of AC_ARG_ENABLE:
dnl
dnl Parameters:
dnl $1 = message
dnl $2 = option name
dnl $3 = help-string
dnl $4 = action to perform if option is enabled
dnl $5 = action if perform if option is disabled
dnl $6 = default option value (either 'yes' or 'no')
AC_DEFUN([CF_ARG_MSG_ENABLE],[
AC_MSG_CHECKING($1)
AC_ARG_ENABLE($2,[$3],,enableval=ifelse($6,,no,$6))
AC_MSG_RESULT($enableval)
if test "$enableval" != no ; then
ifelse($4,,[	:],$4)
else
ifelse($5,,[	:],$5)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_OPTION version: 4 updated: 2010/05/26 05:38:42
dnl -------------
dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
dnl values.
dnl
dnl Parameters:
dnl $1 = option name
dnl $2 = help-string
dnl $3 = action to perform if option is not default
dnl $4 = action if perform if option is default
dnl $5 = default option value (either 'yes' or 'no')
AC_DEFUN([CF_ARG_OPTION],
[AC_ARG_ENABLE([$1],[$2],[test "$enableval" != ifelse([$5],no,yes,no) && enableval=ifelse([$5],no,no,yes)
  if test "$enableval" != "$5" ; then
ifelse([$3],,[    :]dnl
,[    $3]) ifelse([$4],,,[
  else
    $4])
  fi],[enableval=$5 ifelse([$4],,,[
  $4
])dnl
  ])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_BUNDLED_INTL version: 16 updated: 2010/10/23 15:55:05
dnl ---------------
dnl Top-level macro for configuring an application with a bundled copy of
dnl the intl and po directories for gettext.
dnl
dnl $1 specifies either Makefile or makefile, defaulting to the former.
dnl $2 if nonempty sets the option to --enable-nls rather than to --disable-nls
dnl
dnl Sets variables which can be used to substitute in makefiles:
dnl	GT_YES       - "#" comment unless building intl library, otherwise empty
dnl	GT_NO        - "#" comment if building intl library, otherwise empty
dnl	INTLDIR_MAKE - to make ./intl directory
dnl	MSG_DIR_MAKE - to make ./po directory
dnl	SUB_MAKEFILE - list of makefiles in ./intl, ./po directories
dnl
dnl Defines:
dnl	HAVE_LIBGETTEXT_H if we're using ./intl
dnl	NLS_TEXTDOMAIN
dnl
dnl Environment:
dnl	ALL_LINGUAS if set, lists the root names of the ".po" files.
dnl	CONFIG_H assumed to be "config.h"
dnl	PACKAGE must be set, used as default for textdomain
dnl	VERSION may be set, otherwise extract from "VERSION" file.
dnl
AC_DEFUN([CF_BUNDLED_INTL],[
cf_makefile=ifelse($1,,Makefile,$1)

dnl Set of available languages (based on source distribution).  Note that
dnl setting $LINGUAS overrides $ALL_LINGUAS.  Some environments set $LINGUAS
dnl rather than $LC_ALL
test -z "$ALL_LINGUAS" && ALL_LINGUAS=`test -d $srcdir/po && cd $srcdir/po && echo *.po|sed -e 's/\.po//g' -e 's/*//'`

# Allow override of "config.h" definition:
: ${CONFIG_H:=config.h}
AC_SUBST(CONFIG_H)

if test -z "$PACKAGE" ; then
	AC_MSG_ERROR([[CF_BUNDLED_INTL] used without setting [PACKAGE] variable])
fi

if test -z "$VERSION" ; then
if test -f $srcdir/VERSION ; then
	VERSION=`sed -e '2,$d' $srcdir/VERSION|cut -f1`
else
	VERSION=unknown
fi
fi
AC_SUBST(VERSION)

AM_GNU_GETTEXT(,,,[$2])

if test "$USE_NLS" = yes ; then
	AC_ARG_WITH(textdomain,
		[  --with-textdomain=PKG   NLS text-domain (default is package name)],
		[NLS_TEXTDOMAIN=$withval],
		[NLS_TEXTDOMAIN=$PACKAGE])
	AC_DEFINE_UNQUOTED(NLS_TEXTDOMAIN,"$NLS_TEXTDOMAIN")
	AC_SUBST(NLS_TEXTDOMAIN)
fi

INTLDIR_MAKE=
MSG_DIR_MAKE=
SUB_MAKEFILE=

dnl this updates SUB_MAKEFILE and MSG_DIR_MAKE:
CF_OUR_MESSAGES($1)

if test "$USE_INCLUDED_LIBINTL" = yes ; then
        if test "$nls_cv_force_use_gnu_gettext" = yes ; then
		:
	elif test "$nls_cv_use_gnu_gettext" = yes ; then
		:
	else
		INTLDIR_MAKE="#"
	fi
	if test -z "$INTLDIR_MAKE"; then
		AC_DEFINE(HAVE_LIBGETTEXT_H)
		for cf_makefile in \
			$srcdir/intl/Makefile.in \
			$srcdir/intl/makefile.in
		do
			if test -f "$cf_makefile" ; then
				SUB_MAKEFILE="$SUB_MAKEFILE `echo \"${cf_makefile}\"|sed -e 's,^'$srcdir/',,' -e 's/\.in$//'`:${cf_makefile}"
				break
			fi
		done
	fi
else
	INTLDIR_MAKE="#"
	if test "$USE_NLS" = yes ; then
		AC_CHECK_HEADERS(libintl.h)
	fi
fi

if test -z "$INTLDIR_MAKE" ; then
	CPPFLAGS="$CPPFLAGS -I../intl"
fi

dnl FIXME:  we use this in lynx (the alternative is a spurious dependency upon
dnl GNU make)
if test "$BUILD_INCLUDED_LIBINTL" = yes ; then
	GT_YES="#"
	GT_NO=
else
	GT_YES=
	GT_NO="#"
fi

AC_SUBST(INTLDIR_MAKE)
AC_SUBST(MSG_DIR_MAKE)
AC_SUBST(GT_YES)
AC_SUBST(GT_NO)

dnl FIXME:  the underlying AM_GNU_GETTEXT macro either needs some fixes or a
dnl little documentation.  It doesn't define anything so that we can ifdef our
dnl own code, except ENABLE_NLS, which is too vague to be of any use.

if test "$USE_INCLUDED_LIBINTL" = yes ; then
	if test "$nls_cv_force_use_gnu_gettext" = yes ; then
		AC_DEFINE(HAVE_GETTEXT)
	elif test "$nls_cv_use_gnu_gettext" = yes ; then
		AC_DEFINE(HAVE_GETTEXT)
	fi
	if test -n "$nls_cv_header_intl" ; then
		AC_DEFINE(HAVE_LIBINTL_H)
	fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_CACHE version: 11 updated: 2008/03/23 14:45:59
dnl --------------
dnl Check if we're accidentally using a cache from a different machine.
dnl Derive the system name, as a check for reusing the autoconf cache.
dnl
dnl If we've packaged config.guess and config.sub, run that (since it does a
dnl better job than uname).  Normally we'll use AC_CANONICAL_HOST, but allow
dnl an extra parameter that we may override, e.g., for AC_CANONICAL_SYSTEM
dnl which is useful in cross-compiles.
dnl
dnl Note: we would use $ac_config_sub, but that is one of the places where
dnl autoconf 2.5x broke compatibility with autoconf 2.13
AC_DEFUN([CF_CHECK_CACHE],
[
if test -f $srcdir/config.guess || test -f $ac_aux_dir/config.guess ; then
	ifelse([$1],,[AC_CANONICAL_HOST],[$1])
	system_name="$host_os"
else
	system_name="`(uname -s -r) 2>/dev/null`"
	if test -z "$system_name" ; then
		system_name="`(hostname) 2>/dev/null`"
	fi
fi
test -n "$system_name" && AC_DEFINE_UNQUOTED(SYSTEM_NAME,"$system_name")
AC_CACHE_VAL(cf_cv_system_name,[cf_cv_system_name="$system_name"])

test -z "$system_name" && system_name="$cf_cv_system_name"
test -n "$cf_cv_system_name" && AC_MSG_RESULT(Configuring for $cf_cv_system_name)

if test ".$system_name" != ".$cf_cv_system_name" ; then
	AC_MSG_RESULT(Cached system name ($system_name) does not agree with actual ($cf_cv_system_name))
	AC_MSG_ERROR("Please remove config.cache and try again.")
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_CHTYPE version: 7 updated: 2010/10/23 15:54:49
dnl ----------------
dnl Test if curses defines 'chtype' (usually a 'long' type for SysV curses).
AC_DEFUN([CF_CURSES_CHTYPE],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_CACHE_CHECK(for chtype typedef,cf_cv_chtype_decl,[
	AC_TRY_COMPILE([#include <${cf_cv_ncurses_header:-curses.h}>],
		[chtype foo],
		[cf_cv_chtype_decl=yes],
		[cf_cv_chtype_decl=no])])
if test $cf_cv_chtype_decl = yes ; then
	AC_DEFINE(HAVE_TYPE_CHTYPE)
	AC_CACHE_CHECK(if chtype is scalar or struct,cf_cv_chtype_type,[
		AC_TRY_COMPILE([#include <${cf_cv_ncurses_header:-curses.h}>],
			[chtype foo; long x = foo],
			[cf_cv_chtype_type=scalar],
			[cf_cv_chtype_type=struct])])
	if test $cf_cv_chtype_type = scalar ; then
		AC_DEFINE(TYPE_CHTYPE_IS_SCALAR)
	fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_CONFIG version: 2 updated: 2006/10/29 11:06:27
dnl ----------------
dnl Tie together the configure-script macros for curses.  It may be ncurses,
dnl but unless asked, we do not make a special search for ncurses.  However,
dnl still check for the ncurses version number, for use in other macros.
AC_DEFUN([CF_CURSES_CONFIG],
[
CF_CURSES_CPPFLAGS
CF_NCURSES_VERSION
CF_CURSES_LIBS
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_CPPFLAGS version: 11 updated: 2011/04/09 14:51:08
dnl ------------------
dnl Look for the curses headers.
AC_DEFUN([CF_CURSES_CPPFLAGS],[

AC_CACHE_CHECK(for extra include directories,cf_cv_curses_incdir,[
cf_cv_curses_incdir=no
case $host_os in #(vi
hpux10.*) #(vi
	if test "x$cf_cv_screen" = "xcurses_colr"
	then
		test -d /usr/include/curses_colr && \
		cf_cv_curses_incdir="-I/usr/include/curses_colr"
	fi
	;;
sunos3*|sunos4*)
	if test "x$cf_cv_screen" = "xcurses_5lib"
	then
		test -d /usr/5lib && \
		test -d /usr/5include && \
		cf_cv_curses_incdir="-I/usr/5include"
	fi
	;;
esac
])
test "$cf_cv_curses_incdir" != no && CPPFLAGS="$CPPFLAGS $cf_cv_curses_incdir"

CF_CURSES_HEADER
CF_TERM_HEADER
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_FUNCS version: 17 updated: 2011/05/14 16:07:29
dnl ---------------
dnl Curses-functions are a little complicated, since a lot of them are macros.
AC_DEFUN([CF_CURSES_FUNCS],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_REQUIRE([CF_XOPEN_CURSES])
AC_REQUIRE([CF_CURSES_TERM_H])
AC_REQUIRE([CF_CURSES_UNCTRL_H])
for cf_func in $1
do
	CF_UPPER(cf_tr_func,$cf_func)
	AC_MSG_CHECKING(for ${cf_func})
	CF_MSG_LOG(${cf_func})
	AC_CACHE_VAL(cf_cv_func_$cf_func,[
		eval cf_result='$ac_cv_func_'$cf_func
		if test ".$cf_result" != ".no"; then
			AC_TRY_LINK(CF__CURSES_HEAD,
			[
#ifndef ${cf_func}
long foo = (long)(&${cf_func});
if (foo + 1234 > 5678)
	${cf_cv_main_return:-return}(foo);
#endif
			],
			[cf_result=yes],
			[cf_result=no])
		fi
		eval 'cf_cv_func_'$cf_func'=$cf_result'
	])
	# use the computed/retrieved cache-value:
	eval 'cf_result=$cf_cv_func_'$cf_func
	AC_MSG_RESULT($cf_result)
	if test $cf_result != no; then
		AC_DEFINE_UNQUOTED(HAVE_${cf_tr_func})
	fi
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_HEADER version: 3 updated: 2011/05/01 19:47:45
dnl ----------------
dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
dnl variations of ncurses' installs.
dnl
dnl $1 = ncurses when looking for ncurses, or is empty
AC_DEFUN([CF_CURSES_HEADER],[
AC_CACHE_CHECK(if we have identified curses headers,cf_cv_ncurses_header,[
cf_cv_ncurses_header=none
for cf_header in ifelse($1,,,[ \
    $1/ncurses.h \
	$1/curses.h]) \
	ncurses.h \
	curses.h ifelse($1,,[ncurses/ncurses.h ncurses/curses.h])
do
AC_TRY_COMPILE([#include <${cf_header}>],
	[initscr(); tgoto("?", 0,0)],
	[cf_cv_ncurses_header=$cf_header; break],[])
done
])

if test "$cf_cv_ncurses_header" = none ; then
	AC_MSG_ERROR(No curses header-files found)
fi

# cheat, to get the right #define's for HAVE_NCURSES_H, etc.
AC_CHECK_HEADERS($cf_cv_ncurses_header)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_LIBS version: 34 updated: 2011/04/09 14:51:08
dnl --------------
dnl Look for the curses libraries.  Older curses implementations may require
dnl termcap/termlib to be linked as well.  Call CF_CURSES_CPPFLAGS first.
AC_DEFUN([CF_CURSES_LIBS],[

AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_MSG_CHECKING(if we have identified curses libraries)
AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
    [initscr(); tgoto("?", 0,0)],
    cf_result=yes,
    cf_result=no)
AC_MSG_RESULT($cf_result)

if test "$cf_result" = no ; then
case $host_os in #(vi
freebsd*) #(vi
    AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
    ;;
hpux10.*) #(vi
	# Looking at HPUX 10.20, the Hcurses library is the oldest (1997), cur_colr
	# next (1998), and xcurses "newer" (2000).  There is no header file for
	# Hcurses; the subdirectory curses_colr has the headers (curses.h and
	# term.h) for cur_colr
	if test "x$cf_cv_screen" = "xcurses_colr"
	then
		AC_CHECK_LIB(cur_colr,initscr,[
			CF_ADD_LIBS(-lcur_colr)
			ac_cv_func_initscr=yes
			],[
		AC_CHECK_LIB(Hcurses,initscr,[
			# HP's header uses __HP_CURSES, but user claims _HP_CURSES.
			CF_ADD_LIBS(-lHcurses)
			CPPFLAGS="$CPPFLAGS -D__HP_CURSES -D_HP_CURSES"
			ac_cv_func_initscr=yes
			])])
	fi
    ;;
linux*)
	case `arch 2>/dev/null` in
	x86_64)
		if test -d /lib64
		then
			CF_ADD_LIBDIR(/lib64)
		else
			CF_ADD_LIBDIR(/lib)
		fi
		;;
	*)
		CF_ADD_LIBDIR(/lib)
		;;
	esac
    ;;
sunos3*|sunos4*)
	if test "x$cf_cv_screen" = "xcurses_5lib"
	then
		if test -d /usr/5lib ; then
			CF_ADD_LIBDIR(/usr/5lib)
			CF_ADD_LIBS(-lcurses -ltermcap)
		fi
    fi
    ac_cv_func_initscr=yes
    ;;
esac

if test ".$ac_cv_func_initscr" != .yes ; then
    cf_save_LIBS="$LIBS"
    cf_term_lib=""
    cf_curs_lib=""

    if test ".${cf_cv_ncurses_version:-no}" != .no
    then
        cf_check_list="ncurses curses cursesX"
    else
        cf_check_list="cursesX curses ncurses"
    fi

    # Check for library containing tgoto.  Do this before curses library
    # because it may be needed to link the test-case for initscr.
    AC_CHECK_FUNC(tgoto,[cf_term_lib=predefined],[
        for cf_term_lib in $cf_check_list termcap termlib unknown
        do
            AC_CHECK_LIB($cf_term_lib,tgoto,[break])
        done
    ])

    # Check for library containing initscr
    test "$cf_term_lib" != predefined && test "$cf_term_lib" != unknown && LIBS="-l$cf_term_lib $cf_save_LIBS"
 	for cf_curs_lib in $cf_check_list xcurses jcurses pdcurses unknown
    do
        AC_CHECK_LIB($cf_curs_lib,initscr,[break])
    done
    test $cf_curs_lib = unknown && AC_MSG_ERROR(no curses library found)

    LIBS="-l$cf_curs_lib $cf_save_LIBS"
    if test "$cf_term_lib" = unknown ; then
        AC_MSG_CHECKING(if we can link with $cf_curs_lib library)
        AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
            [initscr()],
            [cf_result=yes],
            [cf_result=no])
        AC_MSG_RESULT($cf_result)
        test $cf_result = no && AC_MSG_ERROR(Cannot link curses library)
    elif test "$cf_curs_lib" = "$cf_term_lib" ; then
        :
    elif test "$cf_term_lib" != predefined ; then
        AC_MSG_CHECKING(if we need both $cf_curs_lib and $cf_term_lib libraries)
        AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
            [initscr(); tgoto((char *)0, 0, 0);],
            [cf_result=no],
            [
            LIBS="-l$cf_curs_lib -l$cf_term_lib $cf_save_LIBS"
            AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
                [initscr()],
                [cf_result=yes],
                [cf_result=error])
            ])
        AC_MSG_RESULT($cf_result)
    fi
fi
fi

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_TERM_H version: 9 updated: 2011/04/09 18:19:55
dnl ----------------
dnl SVr4 curses should have term.h as well (where it puts the definitions of
dnl the low-level interface).  This may not be true in old/broken implementations,
dnl as well as in misconfigured systems (e.g., gcc configured for Solaris 2.4
dnl running with Solaris 2.5.1).
AC_DEFUN([CF_CURSES_TERM_H],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl

AC_CACHE_CHECK(for term.h, cf_cv_term_header,[

# If we found <ncurses/curses.h>, look for <ncurses/term.h>, but always look
# for <term.h> if we do not find the variant.

cf_header_list="term.h ncurses/term.h ncursesw/term.h"

case ${cf_cv_ncurses_header:-curses.h} in #(vi
*/*)
	cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`term.h
	cf_header_list="$cf_header_item $cf_header_list"
	;;
esac

for cf_header in $cf_header_list
do
	AC_TRY_COMPILE([
#include <${cf_cv_ncurses_header:-curses.h}>
#include <${cf_header}>],
	[WINDOW *x],
	[cf_cv_term_header=$cf_header
	 break],
	[cf_cv_term_header=no])
done

case $cf_cv_term_header in #(vi
no)
	# If curses is ncurses, some packagers still mess it up by trying to make
	# us use GNU termcap.  This handles the most common case.
	for cf_header in ncurses/term.h ncursesw/term.h
	do
		AC_TRY_COMPILE([
#include <${cf_cv_ncurses_header:-curses.h}>
#ifdef NCURSES_VERSION
#include <${cf_header}>
#else
make an error
#endif],
			[WINDOW *x],
			[cf_cv_term_header=$cf_header
			 break],
			[cf_cv_term_header=no])
	done
	;;
esac
])

case $cf_cv_term_header in #(vi
term.h) #(vi
	AC_DEFINE(HAVE_TERM_H)
	;;
ncurses/term.h) #(vi
	AC_DEFINE(HAVE_NCURSES_TERM_H)
	;;
ncursesw/term.h)
	AC_DEFINE(HAVE_NCURSESW_TERM_H)
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_UNCTRL_H version: 1 updated: 2011/04/09 18:19:55
dnl ------------------
dnl Any X/Open curses implementation must have unctrl.h, but ncurses packages
dnl may put it in a subdirectory (along with ncurses' other headers, of
dnl course).  Packages which put the headers in inconsistent locations are
dnl broken).
AC_DEFUN([CF_CURSES_UNCTRL_H],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl

AC_CACHE_CHECK(for unctrl.h, cf_cv_unctrl_header,[

# If we found <ncurses/curses.h>, look for <ncurses/unctrl.h>, but always look
# for <unctrl.h> if we do not find the variant.

cf_header_list="unctrl.h ncurses/unctrl.h ncursesw/unctrl.h"

case ${cf_cv_ncurses_header:-curses.h} in #(vi
*/*)
	cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`unctrl.h
	cf_header_list="$cf_header_item $cf_header_list"
	;;
esac

for cf_header in $cf_header_list
do
	AC_TRY_COMPILE([
#include <${cf_cv_ncurses_header:-curses.h}>
#include <${cf_header}>],
	[WINDOW *x],
	[cf_cv_unctrl_header=$cf_header
	 break],
	[cf_cv_unctrl_header=no])
done

case $cf_cv_unctrl_header in #(vi
no)
	AC_MSG_WARN(unctrl.h header not found)
	;;
esac
])

case $cf_cv_unctrl_header in #(vi
unctrl.h) #(vi
	AC_DEFINE(HAVE_UNCTRL_H)
	;;
ncurses/unctrl.h) #(vi
	AC_DEFINE(HAVE_NCURSES_UNCTRL_H)
	;;
ncursesw/unctrl.h)
	AC_DEFINE(HAVE_NCURSESW_UNCTRL_H)
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_WACS_MAP version: 5 updated: 2011/01/15 11:28:59
dnl ------------------
dnl Check for likely values of wacs_map[].
AC_DEFUN([CF_CURSES_WACS_MAP],
[
AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
	cf_cv_curses_wacs_map=unknown
	for name in wacs_map _wacs_map __wacs_map _nc_wacs _wacs_char
	do
	AC_TRY_LINK([
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED
#endif
#include <${cf_cv_ncurses_header:-curses.h}>],
	[void *foo = &($name['k'])],
	[cf_cv_curses_wacs_map=$name
	 break])
	done])

test "$cf_cv_curses_wacs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_WACS_ARRAY,$cf_cv_curses_wacs_map)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_WACS_SYMBOLS version: 1 updated: 2011/01/15 11:28:59
dnl ----------------------
dnl Do a check to see if the WACS_xxx constants are defined compatibly with
dnl X/Open Curses.  In particular, NetBSD's implementation of the WACS_xxx
dnl constants is broken since those constants do not point to cchar_t's.
AC_DEFUN([CF_CURSES_WACS_SYMBOLS],
[
AC_REQUIRE([CF_CURSES_WACS_MAP])

AC_CACHE_CHECK(for wide alternate character constants, cf_cv_curses_wacs_symbols,[
cf_cv_curses_wacs_symbols=no
if test "$cf_cv_curses_wacs_map" != unknown
then
	AC_TRY_LINK([
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED
#endif
#include <${cf_cv_ncurses_header:-curses.h}>],
	[cchar_t *foo = WACS_PLUS;
	 $cf_cv_curses_wacs_map['k'] = *WACS_PLUS],
	[cf_cv_curses_wacs_symbols=yes])
else
	AC_TRY_LINK([
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED
#endif
#include <${cf_cv_ncurses_header:-curses.h}>],
	[cchar_t *foo = WACS_PLUS],
	[cf_cv_curses_wacs_symbols=yes])
fi
])

test "$cf_cv_curses_wacs_symbols" != no && AC_DEFINE(CURSES_WACS_SYMBOLS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_DIRNAME version: 4 updated: 2002/12/21 19:25:52
dnl ----------
dnl "dirname" is not portable, so we fake it with a shell script.
AC_DEFUN([CF_DIRNAME],[$1=`echo $2 | sed -e 's%/[[^/]]*$%%'`])dnl
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_ECHO version: 11 updated: 2009/12/13 13:16:57
dnl ---------------
dnl You can always use "make -n" to see the actual options, but it's hard to
dnl pick out/analyze warning messages when the compile-line is long.
dnl
dnl Sets:
dnl	ECHO_LT - symbol to control if libtool is verbose
dnl	ECHO_LD - symbol to prefix "cc -o" lines
dnl	RULE_CC - symbol to put before implicit "cc -c" lines (e.g., .c.o)
dnl	SHOW_CC - symbol to put before explicit "cc -c" lines
dnl	ECHO_CC - symbol to put before any "cc" line
dnl
AC_DEFUN([CF_DISABLE_ECHO],[
AC_MSG_CHECKING(if you want to see long compiling messages)
CF_ARG_DISABLE(echo,
	[  --disable-echo          display "compiling" commands],
	[
    ECHO_LT='--silent'
    ECHO_LD='@echo linking [$]@;'
    RULE_CC='@echo compiling [$]<'
    SHOW_CC='@echo compiling [$]@'
    ECHO_CC='@'
],[
    ECHO_LT=''
    ECHO_LD=''
    RULE_CC=''
    SHOW_CC=''
    ECHO_CC=''
])
AC_MSG_RESULT($enableval)
AC_SUBST(ECHO_LT)
AC_SUBST(ECHO_LD)
AC_SUBST(RULE_CC)
AC_SUBST(SHOW_CC)
AC_SUBST(ECHO_CC)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_LIBTOOL_VERSION version: 1 updated: 2010/05/15 15:45:59
dnl --------------------------
dnl Check if we should use the libtool 1.5 feature "-version-number" instead of
dnl the older "-version-info" feature.  The newer feature allows us to use
dnl version numbering on shared libraries which make them compatible with
dnl various systems.
AC_DEFUN([CF_DISABLE_LIBTOOL_VERSION],
[
AC_MSG_CHECKING(if libtool -version-number should be used)
CF_ARG_DISABLE(libtool-version,
	[  --disable-libtool-version  enable to use libtool's incompatible naming scheme],
	[cf_libtool_version=no],
	[cf_libtool_version=yes])
AC_MSG_RESULT($cf_libtool_version)

if test "$cf_libtool_version" = yes ; then
	LIBTOOL_VERSION="-version-number"
else
	LIBTOOL_VERSION="-version-info"
fi

AC_SUBST(LIBTOOL_VERSION)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_RPATH_HACK version: 2 updated: 2011/02/13 13:31:33
dnl ---------------------
dnl The rpath-hack makes it simpler to build programs, particularly with the
dnl *BSD ports which may have essential libraries in unusual places.  But it
dnl can interfere with building an executable for the base system.  Use this
dnl option in that case.
AC_DEFUN([CF_DISABLE_RPATH_HACK],
[
AC_MSG_CHECKING(if rpath-hack should be disabled)
CF_ARG_DISABLE(rpath-hack,
	[  --disable-rpath-hack    don't add rpath options for additional libraries],
	[cf_disable_rpath_hack=yes],
	[cf_disable_rpath_hack=no])
AC_MSG_RESULT($cf_disable_rpath_hack)
if test "$cf_disable_rpath_hack" = no ; then
	CF_RPATH_HACK
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_FIND_HEADER version: 2 updated: 2007/07/29 11:32:00
dnl --------------
dnl Find a header file, searching for it if it is not already in the include
dnl path.
dnl
dnl	$1 = the header filename
dnl	$2 = the package name
dnl	$3 = action to perform if successful
dnl	$4 = action to perform if not successful
AC_DEFUN([CF_FIND_HEADER],[
AC_CHECK_HEADER([$1],
	cf_find_header=yes,[
	cf_find_header=no
CF_HEADER_PATH(cf_search,$2)
for cf_incdir in $cf_search
do
	if test -f $cf_incdir/$1 ; then
		CF_ADD_INCDIR($cf_incdir)
		CF_VERBOSE(... found in $cf_incdir)
		cf_find_header=yes
		break
	fi
	CF_VERBOSE(... tested $cf_incdir)
done
])
if test "$cf_find_header" = yes ; then
ifelse([$3],,:,[$3])
ifelse([$4],,,[else
$4])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIND_LIBRARY version: 9 updated: 2008/03/23 14:48:54
dnl ---------------
dnl Look for a non-standard library, given parameters for AC_TRY_LINK.  We
dnl prefer a standard location, and use -L options only if we do not find the
dnl library in the standard library location(s).
dnl	$1 = library name
dnl	$2 = library class, usually the same as library name
dnl	$3 = includes
dnl	$4 = code fragment to compile/link
dnl	$5 = corresponding function-name
dnl	$6 = flag, nonnull if failure should not cause an error-exit
dnl
dnl Sets the variable "$cf_libdir" as a side-effect, so we can see if we had
dnl to use a -L option.
AC_DEFUN([CF_FIND_LIBRARY],
[
	eval 'cf_cv_have_lib_'$1'=no'
	cf_libdir=""
	AC_CHECK_FUNC($5,
		eval 'cf_cv_have_lib_'$1'=yes',[
		cf_save_LIBS="$LIBS"
		AC_MSG_CHECKING(for $5 in -l$1)
		LIBS="-l$1 $LIBS"
		AC_TRY_LINK([$3],[$4],
			[AC_MSG_RESULT(yes)
			 eval 'cf_cv_have_lib_'$1'=yes'
			],
			[AC_MSG_RESULT(no)
			CF_LIBRARY_PATH(cf_search,$2)
			for cf_libdir in $cf_search
			do
				AC_MSG_CHECKING(for -l$1 in $cf_libdir)
				LIBS="-L$cf_libdir -l$1 $cf_save_LIBS"
				AC_TRY_LINK([$3],[$4],
					[AC_MSG_RESULT(yes)
			 		 eval 'cf_cv_have_lib_'$1'=yes'
					 break],
					[AC_MSG_RESULT(no)
					 LIBS="$cf_save_LIBS"])
			done
			])
		])
eval 'cf_found_library=[$]cf_cv_have_lib_'$1
ifelse($6,,[
if test $cf_found_library = no ; then
	AC_MSG_ERROR(Cannot link $1 library)
fi
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIND_LINKAGE version: 19 updated: 2010/05/29 16:31:02
dnl ---------------
dnl Find a library (specifically the linkage used in the code fragment),
dnl searching for it if it is not already in the library path.
dnl See also CF_ADD_SEARCHPATH.
dnl
dnl Parameters (4-on are optional):
dnl     $1 = headers for library entrypoint
dnl     $2 = code fragment for library entrypoint
dnl     $3 = the library name without the "-l" option or ".so" suffix.
dnl     $4 = action to perform if successful (default: update CPPFLAGS, etc)
dnl     $5 = action to perform if not successful
dnl     $6 = module name, if not the same as the library name
dnl     $7 = extra libraries
dnl
dnl Sets these variables:
dnl     $cf_cv_find_linkage_$3 - yes/no according to whether linkage is found
dnl     $cf_cv_header_path_$3 - include-directory if needed
dnl     $cf_cv_library_path_$3 - library-directory if needed
dnl     $cf_cv_library_file_$3 - library-file if needed, e.g., -l$3
AC_DEFUN([CF_FIND_LINKAGE],[

# If the linkage is not already in the $CPPFLAGS/$LDFLAGS configuration, these
# will be set on completion of the AC_TRY_LINK below.
cf_cv_header_path_$3=
cf_cv_library_path_$3=

CF_MSG_LOG([Starting [FIND_LINKAGE]($3,$6)])

cf_save_LIBS="$LIBS"

AC_TRY_LINK([$1],[$2],[
	cf_cv_find_linkage_$3=yes
	cf_cv_header_path_$3=/usr/include
	cf_cv_library_path_$3=/usr/lib
],[

LIBS="-l$3 $7 $cf_save_LIBS"

AC_TRY_LINK([$1],[$2],[
	cf_cv_find_linkage_$3=yes
	cf_cv_header_path_$3=/usr/include
	cf_cv_library_path_$3=/usr/lib
	cf_cv_library_file_$3="-l$3"
],[
	cf_cv_find_linkage_$3=no
	LIBS="$cf_save_LIBS"

    CF_VERBOSE(find linkage for $3 library)
    CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])

    cf_save_CPPFLAGS="$CPPFLAGS"
    cf_test_CPPFLAGS="$CPPFLAGS"

    CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
    for cf_cv_header_path_$3 in $cf_search
    do
      if test -d $cf_cv_header_path_$3 ; then
        CF_VERBOSE(... testing $cf_cv_header_path_$3)
        CPPFLAGS="$cf_save_CPPFLAGS -I$cf_cv_header_path_$3"
        AC_TRY_COMPILE([$1],[$2],[
            CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
            cf_cv_find_linkage_$3=maybe
            cf_test_CPPFLAGS="$CPPFLAGS"
            break],[
            CPPFLAGS="$cf_save_CPPFLAGS"
            ])
      fi
    done

    if test "$cf_cv_find_linkage_$3" = maybe ; then

      CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])

      cf_save_LIBS="$LIBS"
      cf_save_LDFLAGS="$LDFLAGS"

      ifelse([$6],,,[
        CPPFLAGS="$cf_test_CPPFLAGS"
        LIBS="-l$3 $7 $cf_save_LIBS"
        AC_TRY_LINK([$1],[$2],[
            CF_VERBOSE(... found $3 library in system)
            cf_cv_find_linkage_$3=yes])
            CPPFLAGS="$cf_save_CPPFLAGS"
            LIBS="$cf_save_LIBS"
            ])

      if test "$cf_cv_find_linkage_$3" != yes ; then
        CF_LIBRARY_PATH(cf_search,$3)
        for cf_cv_library_path_$3 in $cf_search
        do
          if test -d $cf_cv_library_path_$3 ; then
            CF_VERBOSE(... testing $cf_cv_library_path_$3)
            CPPFLAGS="$cf_test_CPPFLAGS"
            LIBS="-l$3 $7 $cf_save_LIBS"
            LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
            AC_TRY_LINK([$1],[$2],[
                CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
                cf_cv_find_linkage_$3=yes
                cf_cv_library_file_$3="-l$3"
                break],[
                CPPFLAGS="$cf_save_CPPFLAGS"
                LIBS="$cf_save_LIBS"
                LDFLAGS="$cf_save_LDFLAGS"
                ])
          fi
        done
        CPPFLAGS="$cf_save_CPPFLAGS"
        LDFLAGS="$cf_save_LDFLAGS"
      fi

    else
      cf_cv_find_linkage_$3=no
    fi
    ],$7)
])

LIBS="$cf_save_LIBS"

if test "$cf_cv_find_linkage_$3" = yes ; then
ifelse([$4],,[
	CF_ADD_INCDIR($cf_cv_header_path_$3)
	CF_ADD_LIBDIR($cf_cv_library_path_$3)
	CF_ADD_LIB($3)
],[$4])
else
ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FUNC_WAIT version: 2 updated: 1997/10/21 19:45:33
dnl ------------
dnl Test for the presence of <sys/wait.h>, 'union wait', arg-type of 'wait()'
dnl and/or 'waitpid()'.
dnl
dnl Note that we cannot simply grep for 'union wait' in the wait.h file,
dnl because some Posix systems turn this on only when a BSD variable is
dnl defined.
dnl
dnl I don't use AC_HEADER_SYS_WAIT, because it defines HAVE_SYS_WAIT_H, which
dnl would conflict with an attempt to test that header directly.
dnl
AC_DEFUN([CF_FUNC_WAIT],
[
AC_REQUIRE([CF_UNION_WAIT])
if test $cf_cv_type_unionwait = yes; then

	AC_MSG_CHECKING(if union wait can be used as wait-arg)
	AC_CACHE_VAL(cf_cv_arg_union_wait,[
		AC_TRY_COMPILE($cf_wait_headers,
 			[union wait x; wait(&x)],
			[cf_cv_arg_union_wait=yes],
			[cf_cv_arg_union_wait=no])
		])
	AC_MSG_RESULT($cf_cv_arg_union_wait)
	test $cf_cv_arg_union_wait = yes && AC_DEFINE(WAIT_USES_UNION)

	AC_MSG_CHECKING(if union wait can be used as waitpid-arg)
	AC_CACHE_VAL(cf_cv_arg_union_waitpid,[
		AC_TRY_COMPILE($cf_wait_headers,
 			[union wait x; waitpid(0, &x, 0)],
			[cf_cv_arg_union_waitpid=yes],
			[cf_cv_arg_union_waitpid=no])
		])
	AC_MSG_RESULT($cf_cv_arg_union_waitpid)
	test $cf_cv_arg_union_waitpid = yes && AC_DEFINE(WAITPID_USES_UNION)

fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_ATTRIBUTES version: 14 updated: 2010/10/23 15:52:32
dnl -----------------
dnl Test for availability of useful gcc __attribute__ directives to quiet
dnl compiler warnings.  Though useful, not all are supported -- and contrary
dnl to documentation, unrecognized directives cause older compilers to barf.
AC_DEFUN([CF_GCC_ATTRIBUTES],
[
if test "$GCC" = yes
then
cat > conftest.i <<EOF
#ifndef GCC_PRINTF
#define GCC_PRINTF 0
#endif
#ifndef GCC_SCANF
#define GCC_SCANF 0
#endif
#ifndef GCC_NORETURN
#define GCC_NORETURN /* nothing */
#endif
#ifndef GCC_UNUSED
#define GCC_UNUSED /* nothing */
#endif
EOF
if test "$GCC" = yes
then
	AC_CHECKING([for $CC __attribute__ directives])
cat > conftest.$ac_ext <<EOF
#line __oline__ "${as_me:-configure}"
#include "confdefs.h"
#include "conftest.h"
#include "conftest.i"
#if	GCC_PRINTF
#define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
#else
#define GCC_PRINTFLIKE(fmt,var) /*nothing*/
#endif
#if	GCC_SCANF
#define GCC_SCANFLIKE(fmt,var)  __attribute__((format(scanf,fmt,var)))
#else
#define GCC_SCANFLIKE(fmt,var)  /*nothing*/
#endif
extern void wow(char *,...) GCC_SCANFLIKE(1,2);
extern void oops(char *,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
extern void foo(void) GCC_NORETURN;
int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { return 0; }
EOF
	cf_printf_attribute=no
	cf_scanf_attribute=no
	for cf_attribute in scanf printf unused noreturn
	do
		CF_UPPER(cf_ATTRIBUTE,$cf_attribute)
		cf_directive="__attribute__(($cf_attribute))"
		echo "checking for $CC $cf_directive" 1>&AC_FD_CC

		case $cf_attribute in #(vi
		printf) #(vi
			cf_printf_attribute=yes
			cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
			;;
		scanf) #(vi
			cf_scanf_attribute=yes
			cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
			;;
		*) #(vi
			cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE $cf_directive
EOF
			;;
		esac

		if AC_TRY_EVAL(ac_compile); then
			test -n "$verbose" && AC_MSG_RESULT(... $cf_attribute)
			cat conftest.h >>confdefs.h
			case $cf_attribute in #(vi
			printf) #(vi
				if test "$cf_printf_attribute" = no ; then
					cat >>confdefs.h <<EOF
#define GCC_PRINTFLIKE(fmt,var) /* nothing */
EOF
				else
					cat >>confdefs.h <<EOF
#define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
EOF
				fi
				;;
			scanf) #(vi
				if test "$cf_scanf_attribute" = no ; then
					cat >>confdefs.h <<EOF
#define GCC_SCANFLIKE(fmt,var) /* nothing */
EOF
				else
					cat >>confdefs.h <<EOF
#define GCC_SCANFLIKE(fmt,var)  __attribute__((format(scanf,fmt,var)))
EOF
				fi
				;;
			esac
		fi
	done
else
	fgrep define conftest.i >>confdefs.h
fi
rm -rf conftest*
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_VERSION version: 5 updated: 2010/04/24 11:02:31
dnl --------------
dnl Find version of gcc
AC_DEFUN([CF_GCC_VERSION],[
AC_REQUIRE([AC_PROG_CC])
GCC_VERSION=none
if test "$GCC" = yes ; then
	AC_MSG_CHECKING(version of $CC)
	GCC_VERSION="`${CC} --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(GCC) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
	test -z "$GCC_VERSION" && GCC_VERSION=unknown
	AC_MSG_RESULT($GCC_VERSION)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_WARNINGS version: 27 updated: 2010/10/23 15:52:32
dnl ---------------
dnl Check if the compiler supports useful warning options.  There's a few that
dnl we don't use, simply because they're too noisy:
dnl
dnl	-Wconversion (useful in older versions of gcc, but not in gcc 2.7.x)
dnl	-Wredundant-decls (system headers make this too noisy)
dnl	-Wtraditional (combines too many unrelated messages, only a few useful)
dnl	-Wwrite-strings (too noisy, but should review occasionally).  This
dnl		is enabled for ncurses using "--enable-const".
dnl	-pedantic
dnl
dnl Parameter:
dnl	$1 is an optional list of gcc warning flags that a particular
dnl		application might want to use, e.g., "no-unused" for
dnl		-Wno-unused
dnl Special:
dnl	If $with_ext_const is "yes", add a check for -Wwrite-strings
dnl
AC_DEFUN([CF_GCC_WARNINGS],
[
AC_REQUIRE([CF_GCC_VERSION])
CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)

cat > conftest.$ac_ext <<EOF
#line __oline__ "${as_me:-configure}"
int main(int argc, char *argv[[]]) { return (argv[[argc-1]] == 0) ; }
EOF

if test "$INTEL_COMPILER" = yes
then
# The "-wdXXX" options suppress warnings:
# remark #1419: external declaration in primary source file
# remark #1683: explicit conversion of a 64-bit integral type to a smaller integral type (potential portability problem)
# remark #1684: conversion from pointer to same-sized integral type (potential portability problem)
# remark #193: zero used for undefined preprocessing identifier
# remark #593: variable "curs_sb_left_arrow" was set but never used
# remark #810: conversion from "int" to "Dimension={unsigned short}" may lose significant bits
# remark #869: parameter "tw" was never referenced
# remark #981: operands are evaluated in unspecified order
# warning #279: controlling expression is constant

	AC_CHECKING([for $CC warning options])
	cf_save_CFLAGS="$CFLAGS"
	EXTRA_CFLAGS="-Wall"
	for cf_opt in \
		wd1419 \
		wd1683 \
		wd1684 \
		wd193 \
		wd593 \
		wd279 \
		wd810 \
		wd869 \
		wd981
	do
		CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
		if AC_TRY_EVAL(ac_compile); then
			test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
			EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
		fi
	done
	CFLAGS="$cf_save_CFLAGS"

elif test "$GCC" = yes
then
	AC_CHECKING([for $CC warning options])
	cf_save_CFLAGS="$CFLAGS"
	EXTRA_CFLAGS=
	cf_warn_CONST=""
	test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
	for cf_opt in W Wall \
		Wbad-function-cast \
		Wcast-align \
		Wcast-qual \
		Winline \
		Wmissing-declarations \
		Wmissing-prototypes \
		Wnested-externs \
		Wpointer-arith \
		Wshadow \
		Wstrict-prototypes \
		Wundef $cf_warn_CONST $1
	do
		CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
		if AC_TRY_EVAL(ac_compile); then
			test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
			case $cf_opt in #(vi
			Wcast-qual) #(vi
				CPPFLAGS="$CPPFLAGS -DXTSTRINGDEFINES"
				;;
			Winline) #(vi
				case $GCC_VERSION in
				[[34]].*)
					CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
					continue;;
				esac
				;;
			esac
			EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
		fi
	done
	CFLAGS="$cf_save_CFLAGS"
fi
rm -rf conftest*

AC_SUBST(EXTRA_CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNU_SOURCE version: 6 updated: 2005/07/09 13:23:07
dnl -------------
dnl Check if we must define _GNU_SOURCE to get a reasonable value for
dnl _XOPEN_SOURCE, upon which many POSIX definitions depend.  This is a defect
dnl (or misfeature) of glibc2, which breaks portability of many applications,
dnl since it is interwoven with GNU extensions.
dnl
dnl Well, yes we could work around it...
AC_DEFUN([CF_GNU_SOURCE],
[
AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_gnu_source=no],
	[cf_save="$CPPFLAGS"
	 CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
	 AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_gnu_source=no],
	[cf_cv_gnu_source=yes])
	CPPFLAGS="$cf_save"
	])
])
test "$cf_cv_gnu_source" = yes && CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_HEADERS_SH version: 1 updated: 2007/07/04 15:37:05
dnl -------------
dnl Setup variables needed to construct headers-sh
AC_DEFUN([CF_HEADERS_SH],[
PACKAGE_PREFIX=$1
PACKAGE_CONFIG=$2
AC_SUBST(PACKAGE_PREFIX)
AC_SUBST(PACKAGE_CONFIG)
EXTRA_OUTPUT="$EXTRA_OUTPUT headers-sh:$srcdir/headers-sh.in"
])
dnl ---------------------------------------------------------------------------
dnl CF_HEADER_PATH version: 12 updated: 2010/05/05 05:22:40
dnl --------------
dnl Construct a search-list of directories for a nonstandard header-file
dnl
dnl Parameters
dnl	$1 = the variable to return as result
dnl	$2 = the package name
AC_DEFUN([CF_HEADER_PATH],
[
$1=

# collect the current set of include-directories from compiler flags
cf_header_path_list=""
if test -n "${CFLAGS}${CPPFLAGS}" ; then
	for cf_header_path in $CPPFLAGS $CFLAGS
	do
		case $cf_header_path in #(vi
		-I*)
			cf_header_path=`echo ".$cf_header_path" |sed -e 's/^...//' -e 's,/include$,,'`
			CF_ADD_SUBDIR_PATH($1,$2,include,$cf_header_path,NONE)
			cf_header_path_list="$cf_header_path_list [$]$1"
			;;
		esac
	done
fi

# add the variations for the package we are looking for
CF_SUBDIR_PATH($1,$2,include)

test "$includedir" != NONE && \
test "$includedir" != "/usr/include" && \
test -d "$includedir" && {
	test -d $includedir &&    $1="[$]$1 $includedir"
	test -d $includedir/$2 && $1="[$]$1 $includedir/$2"
}

test "$oldincludedir" != NONE && \
test "$oldincludedir" != "/usr/include" && \
test -d "$oldincludedir" && {
	test -d $oldincludedir    && $1="[$]$1 $oldincludedir"
	test -d $oldincludedir/$2 && $1="[$]$1 $oldincludedir/$2"
}

$1="[$]$1 $cf_header_path_list"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_HELP_MESSAGE version: 3 updated: 1998/01/14 10:56:23
dnl ---------------
dnl Insert text into the help-message, for readability, from AC_ARG_WITH.
AC_DEFUN([CF_HELP_MESSAGE],
[AC_DIVERT_HELP([$1])dnl
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INCLUDE_DIRS version: 6 updated: 2009/01/06 19:37:40
dnl ---------------
dnl Construct the list of include-options according to whether we're building
dnl in the source directory or using '--srcdir=DIR' option.  If we're building
dnl with gcc, don't append the includedir if it happens to be /usr/include,
dnl since that usually breaks gcc's shadow-includes.
AC_DEFUN([CF_INCLUDE_DIRS],
[
CPPFLAGS="$CPPFLAGS -I. -I../include"
if test "$srcdir" != "."; then
	CPPFLAGS="$CPPFLAGS -I\${srcdir}/../include"
fi
if test "$GCC" != yes; then
	CPPFLAGS="$CPPFLAGS -I\${includedir}"
elif test "$includedir" != "/usr/include"; then
	if test "$includedir" = '${prefix}/include' ; then
		if test $prefix != /usr ; then
			CPPFLAGS="$CPPFLAGS -I\${includedir}"
		fi
	else
		CPPFLAGS="$CPPFLAGS -I\${includedir}"
	fi
fi
AC_SUBST(CPPFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INCLUDE_PATH version: 5 updated: 2010/01/17 20:36:17
dnl ---------------
dnl	Adds to the include-path
dnl
dnl	Autoconf 1.11 should have provided a way to add include path options to
dnl	the cpp-tests.
dnl
AC_DEFUN([CF_INCLUDE_PATH],
[
$1=
for cf_path in $1
do
	cf_result="no"
	AC_MSG_CHECKING(for directory $cf_path)
	if test -d $cf_path
	then
		INCLUDES="$INCLUDES -I$cf_path"
		ac_cpp="${ac_cpp} -I$cf_path"
		CFLAGS="$CFLAGS -I$cf_path"
		cf_result="yes"
		case $cf_path in
		/usr/include|/usr/include/*)
			;;
		*)
			CF_DIRNAME(cf_temp,$cf_path)
			case $cf_temp in
			*/include)
				INCLUDES="$INCLUDES -I$cf_temp"
				ac_cpp="${ac_cpp} -I$cf_temp"
				CFLAGS="$CFLAGS -I$cf_temp"
				;;
			esac
		esac
	fi
	AC_MSG_RESULT($cf_result)
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INTEL_COMPILER version: 4 updated: 2010/05/26 05:38:42
dnl -----------------
dnl Check if the given compiler is really the Intel compiler for Linux.  It
dnl tries to imitate gcc, but does not return an error when it finds a mismatch
dnl between prototypes, e.g., as exercised by CF_MISSING_CHECK.
dnl
dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
dnl ensure that it is not mistaken for gcc/g++.  It is normally invoked from
dnl the wrappers for gcc and g++ warnings.
dnl
dnl $1 = GCC (default) or GXX
dnl $2 = INTEL_COMPILER (default) or INTEL_CPLUSPLUS
dnl $3 = CFLAGS (default) or CXXFLAGS
AC_DEFUN([CF_INTEL_COMPILER],[
ifelse([$2],,INTEL_COMPILER,[$2])=no

if test "$ifelse([$1],,[$1],GCC)" = yes ; then
	case $host_os in
	linux*|gnu*)
		AC_MSG_CHECKING(if this is really Intel ifelse([$1],GXX,C++,C) compiler)
		cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
		ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -no-gcc"
		AC_TRY_COMPILE([],[
#ifdef __INTEL_COMPILER
#else
make an error
#endif
],[ifelse([$2],,INTEL_COMPILER,[$2])=yes
cf_save_CFLAGS="$cf_save_CFLAGS -we147 -no-gcc"
],[])
		ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
		AC_MSG_RESULT($ifelse([$2],,INTEL_COMPILER,[$2]))
		;;
	esac
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LARGEFILE version: 7 updated: 2007/06/02 11:58:50
dnl ------------
dnl Add checks for large file support.
AC_DEFUN([CF_LARGEFILE],[
ifdef([AC_FUNC_FSEEKO],[
    AC_SYS_LARGEFILE
    if test "$enable_largefile" != no ; then
	AC_FUNC_FSEEKO

	# Normally we would collect these definitions in the config.h,
	# but (like _XOPEN_SOURCE), some environments rely on having these
	# defined before any of the system headers are included.  Another
	# case comes up with C++, e.g., on AIX the compiler compiles the
	# header files by themselves before looking at the body files it is
	# told to compile.  For ncurses, those header files do not include
	# the config.h
	test "$ac_cv_sys_large_files"      != no && CPPFLAGS="$CPPFLAGS -D_LARGE_FILES "
	test "$ac_cv_sys_largefile_source" != no && CPPFLAGS="$CPPFLAGS -D_LARGEFILE_SOURCE "
	test "$ac_cv_sys_file_offset_bits" != no && CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits "

	AC_CACHE_CHECK(whether to use struct dirent64, cf_cv_struct_dirent64,[
		AC_TRY_COMPILE([
#include <sys/types.h>
#include <dirent.h>
		],[
		/* if transitional largefile support is setup, this is true */
		extern struct dirent64 * readdir(DIR *);
		struct dirent64 *x = readdir((DIR *)0);
		struct dirent *y = readdir((DIR *)0);
		int z = x - y;
		],
		[cf_cv_struct_dirent64=yes],
		[cf_cv_struct_dirent64=no])
	])
	test "$cf_cv_struct_dirent64" = yes && AC_DEFINE(HAVE_STRUCT_DIRENT64)
    fi
])
])
dnl ---------------------------------------------------------------------------
dnl CF_LD_RPATH_OPT version: 4 updated: 2011/06/04 20:09:13
dnl ---------------
dnl For the given system and compiler, find the compiler flags to pass to the
dnl loader to use the "rpath" feature.
AC_DEFUN([CF_LD_RPATH_OPT],
[
AC_REQUIRE([CF_CHECK_CACHE])

LD_RPATH_OPT=
AC_MSG_CHECKING(for an rpath option)
case $cf_cv_system_name in #(vi
irix*) #(vi
	if test "$GCC" = yes; then
		LD_RPATH_OPT="-Wl,-rpath,"
	else
		LD_RPATH_OPT="-rpath "
	fi
	;;
linux*|gnu*|k*bsd*-gnu) #(vi
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
openbsd[[2-9]].*|mirbsd*) #(vi
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
freebsd*) #(vi
	LD_RPATH_OPT="-rpath "
	;;
netbsd*) #(vi
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
osf*|mls+*) #(vi
	LD_RPATH_OPT="-rpath "
	;;
solaris2*) #(vi
	LD_RPATH_OPT="-R"
	;;
*)
	;;
esac
AC_MSG_RESULT($LD_RPATH_OPT)

case "x$LD_RPATH_OPT" in #(vi
x-R*)
	AC_MSG_CHECKING(if we need a space after rpath option)
	cf_save_LIBS="$LIBS"
	CF_ADD_LIBS(${LD_RPATH_OPT}$libdir)
	AC_TRY_LINK(, , cf_rpath_space=no, cf_rpath_space=yes)
	LIBS="$cf_save_LIBS"
	AC_MSG_RESULT($cf_rpath_space)
	test "$cf_rpath_space" = yes && LD_RPATH_OPT="$LD_RPATH_OPT "
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIBRARY_PATH version: 9 updated: 2010/03/28 12:52:50
dnl ---------------
dnl Construct a search-list of directories for a nonstandard library-file
dnl
dnl Parameters
dnl	$1 = the variable to return as result
dnl	$2 = the package name
AC_DEFUN([CF_LIBRARY_PATH],
[
$1=
cf_library_path_list=""
if test -n "${LDFLAGS}${LIBS}" ; then
	for cf_library_path in $LDFLAGS $LIBS
	do
		case $cf_library_path in #(vi
		-L*)
			cf_library_path=`echo ".$cf_library_path" |sed -e 's/^...//' -e 's,/lib$,,'`
			CF_ADD_SUBDIR_PATH($1,$2,lib,$cf_library_path,NONE)
			cf_library_path_list="$cf_library_path_list [$]$1"
			;;
		esac
	done
fi

CF_SUBDIR_PATH($1,$2,lib)

$1="$cf_library_path_list [$]$1"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIB_PREFIX version: 8 updated: 2008/09/13 11:34:16
dnl -------------
dnl Compute the library-prefix for the given host system
dnl $1 = variable to set
AC_DEFUN([CF_LIB_PREFIX],
[
	case $cf_cv_system_name in #(vi
	OS/2*|os2*) #(vi
        LIB_PREFIX=''
        ;;
	*)	LIB_PREFIX='lib'
        ;;
	esac
ifelse($1,,,[$1=$LIB_PREFIX])
	AC_SUBST(LIB_PREFIX)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MAKEFLAGS version: 14 updated: 2011/03/31 19:29:46
dnl ------------
dnl Some 'make' programs support ${MAKEFLAGS}, some ${MFLAGS}, to pass 'make'
dnl options to lower-levels.  It's very useful for "make -n" -- if we have it.
dnl (GNU 'make' does both, something POSIX 'make', which happens to make the
dnl ${MAKEFLAGS} variable incompatible because it adds the assignments :-)
AC_DEFUN([CF_MAKEFLAGS],
[
AC_CACHE_CHECK(for makeflags variable, cf_cv_makeflags,[
	cf_cv_makeflags=''
	for cf_option in '-${MAKEFLAGS}' '${MFLAGS}'
	do
		cat >cf_makeflags.tmp <<CF_EOF
SHELL = /bin/sh
all :
	@ echo '.$cf_option'
CF_EOF
		cf_result=`${MAKE:-make} -k -f cf_makeflags.tmp 2>/dev/null | fgrep -v "ing directory" | sed -e 's,[[ 	]]*$,,'`
		case "$cf_result" in
		.*k)
			cf_result=`${MAKE:-make} -k -f cf_makeflags.tmp CC=cc 2>/dev/null`
			case "$cf_result" in
			.*CC=*)	cf_cv_makeflags=
				;;
			*)	cf_cv_makeflags=$cf_option
				;;
			esac
			break
			;;
		.-)	;;
		*)	echo "given option \"$cf_option\", no match \"$cf_result\""
			;;
		esac
	done
	rm -f cf_makeflags.tmp
])

AC_SUBST(cf_cv_makeflags)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MAKE_TAGS version: 6 updated: 2010/10/23 15:52:32
dnl ------------
dnl Generate tags/TAGS targets for makefiles.  Do not generate TAGS if we have
dnl a monocase filesystem.
AC_DEFUN([CF_MAKE_TAGS],[
AC_REQUIRE([CF_MIXEDCASE_FILENAMES])

AC_CHECK_PROGS(CTAGS, exctags ctags)
AC_CHECK_PROGS(ETAGS, exetags etags)

AC_CHECK_PROG(MAKE_LOWER_TAGS, ${CTAGS:-ctags}, yes, no)

if test "$cf_cv_mixedcase" = yes ; then
	AC_CHECK_PROG(MAKE_UPPER_TAGS, ${ETAGS:-etags}, yes, no)
else
	MAKE_UPPER_TAGS=no
fi

if test "$MAKE_UPPER_TAGS" = yes ; then
	MAKE_UPPER_TAGS=
else
	MAKE_UPPER_TAGS="#"
fi

if test "$MAKE_LOWER_TAGS" = yes ; then
	MAKE_LOWER_TAGS=
else
	MAKE_LOWER_TAGS="#"
fi

AC_SUBST(CTAGS)
AC_SUBST(ETAGS)

AC_SUBST(MAKE_UPPER_TAGS)
AC_SUBST(MAKE_LOWER_TAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MATH_LIB version: 8 updated: 2010/05/29 16:31:02
dnl -----------
dnl Checks for libraries.  At least one UNIX system, Apple Macintosh
dnl Rhapsody 5.5, does not have -lm.  We cannot use the simpler
dnl AC_CHECK_LIB(m,sin), because that fails for C++.
AC_DEFUN([CF_MATH_LIB],
[
AC_CACHE_CHECK(if -lm needed for math functions,
	cf_cv_need_libm,[
	AC_TRY_LINK([
	#include <stdio.h>
	#include <math.h>
	],
	[double x = rand(); printf("result = %g\n", ]ifelse([$2],,sin(x),$2)[)],
	[cf_cv_need_libm=no],
	[cf_cv_need_libm=yes])])
if test "$cf_cv_need_libm" = yes
then
ifelse($1,,[
	CF_ADD_LIB(m)
],[$1=-lm])
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_MBSTATE_T version: 3 updated: 2007/03/25 15:55:36
dnl ------------
dnl Check if mbstate_t is declared, and if so, which header file.
dnl This (including wchar.h) is needed on Tru64 5.0 to declare mbstate_t,
dnl as well as include stdio.h to work around a misuse of varargs in wchar.h
AC_DEFUN([CF_MBSTATE_T],
[
AC_CACHE_CHECK(if we must include wchar.h to declare mbstate_t,cf_cv_mbstate_t,[
AC_TRY_COMPILE([
#include <stdlib.h>
#include <stdio.h>
#ifdef HAVE_LIBUTF8_H
#include <libutf8.h>
#endif],
	[mbstate_t state],
	[cf_cv_mbstate_t=no],
	[AC_TRY_COMPILE([
#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#ifdef HAVE_LIBUTF8_H
#include <libutf8.h>
#endif],
	[mbstate_t value],
	[cf_cv_mbstate_t=yes],
	[cf_cv_mbstate_t=unknown])])])

if test "$cf_cv_mbstate_t" = yes ; then
	AC_DEFINE(NEED_WCHAR_H)
fi

if test "$cf_cv_mbstate_t" != unknown ; then
	AC_DEFINE(HAVE_MBSTATE_T)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MIXEDCASE_FILENAMES version: 3 updated: 2003/09/20 17:07:55
dnl ----------------------
dnl Check if the file-system supports mixed-case filenames.  If we're able to
dnl create a lowercase name and see it as uppercase, it doesn't support that.
AC_DEFUN([CF_MIXEDCASE_FILENAMES],
[
AC_CACHE_CHECK(if filesystem supports mixed-case filenames,cf_cv_mixedcase,[
if test "$cross_compiling" = yes ; then
	case $target_alias in #(vi
	*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-mingw32*|*-uwin*) #(vi
		cf_cv_mixedcase=no
		;;
	*)
		cf_cv_mixedcase=yes
		;;
	esac
else
	rm -f conftest CONFTEST
	echo test >conftest
	if test -f CONFTEST ; then
		cf_cv_mixedcase=no
	else
		cf_cv_mixedcase=yes
	fi
	rm -f conftest CONFTEST
fi
])
test "$cf_cv_mixedcase" = yes && AC_DEFINE(MIXEDCASE_FILENAMES)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MSG_LOG version: 5 updated: 2010/10/23 15:52:32
dnl ----------
dnl Write a debug message to config.log, along with the line number in the
dnl configure script.
AC_DEFUN([CF_MSG_LOG],[
echo "${as_me:-configure}:__oline__: testing $* ..." 1>&AC_FD_CC
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CC_CHECK version: 4 updated: 2007/07/29 10:39:05
dnl -------------------
dnl Check if we can compile with ncurses' header file
dnl $1 is the cache variable to set
dnl $2 is the header-file to include
dnl $3 is the root name (ncurses or ncursesw)
AC_DEFUN([CF_NCURSES_CC_CHECK],[
	AC_TRY_COMPILE([
]ifelse($3,ncursesw,[
#define _XOPEN_SOURCE_EXTENDED
#undef  HAVE_LIBUTF8_H	/* in case we used CF_UTF8_LIB */
#define HAVE_LIBUTF8_H	/* to force ncurses' header file to use cchar_t */
])[
#include <$2>],[
#ifdef NCURSES_VERSION
]ifelse($3,ncursesw,[
#ifndef WACS_BSSB
	make an error
#endif
])[
printf("%s\n", NCURSES_VERSION);
#else
#ifdef __NCURSES_H
printf("old\n");
#else
	make an error
#endif
#endif
	]
	,[$1=$2]
	,[$1=no])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CONFIG version: 8 updated: 2010/07/08 05:17:30
dnl -----------------
dnl Tie together the configure-script macros for ncurses.
dnl Prefer the "-config" script from ncurses 6.x, to simplify analysis.
dnl Allow that to be overridden using the $NCURSES_CONFIG environment variable.
dnl
dnl $1 is the root library name (default: "ncurses")
AC_DEFUN([CF_NCURSES_CONFIG],
[
cf_ncuconfig_root=ifelse($1,,ncurses,$1)

echo "Looking for ${cf_ncuconfig_root}-config"
AC_PATH_PROGS(NCURSES_CONFIG,${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config,none)

if test "$NCURSES_CONFIG" != none ; then

CPPFLAGS="$CPPFLAGS `$NCURSES_CONFIG --cflags`"
CF_ADD_LIBS(`$NCURSES_CONFIG --libs`)

# even with config script, some packages use no-override for curses.h
CF_CURSES_HEADER(ifelse($1,,ncurses,$1))

dnl like CF_NCURSES_CPPFLAGS
AC_DEFINE(NCURSES)

dnl like CF_NCURSES_LIBS
CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_ncuconfig_root)
AC_DEFINE_UNQUOTED($cf_nculib_ROOT)

dnl like CF_NCURSES_VERSION
cf_cv_ncurses_version=`$NCURSES_CONFIG --version`

else

CF_NCURSES_CPPFLAGS(ifelse($1,,ncurses,$1))
CF_NCURSES_LIBS(ifelse($1,,ncurses,$1))

fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CPPFLAGS version: 20 updated: 2010/11/20 17:02:38
dnl -------------------
dnl Look for the SVr4 curses clone 'ncurses' in the standard places, adjusting
dnl the CPPFLAGS variable so we can include its header.
dnl
dnl The header files may be installed as either curses.h, or ncurses.h (would
dnl be obsolete, except that some packagers prefer this name to distinguish it
dnl from a "native" curses implementation).  If not installed for overwrite,
dnl the curses.h file would be in an ncurses subdirectory (e.g.,
dnl /usr/include/ncurses), but someone may have installed overwriting the
dnl vendor's curses.  Only very old versions (pre-1.9.2d, the first autoconf'd
dnl version) of ncurses don't define either __NCURSES_H or NCURSES_VERSION in
dnl the header.
dnl
dnl If the installer has set $CFLAGS or $CPPFLAGS so that the ncurses header
dnl is already in the include-path, don't even bother with this, since we cannot
dnl easily determine which file it is.  In this case, it has to be <curses.h>.
dnl
dnl The optional parameter gives the root name of the library, in case it is
dnl not installed as the default curses library.  That is how the
dnl wide-character version of ncurses is installed.
AC_DEFUN([CF_NCURSES_CPPFLAGS],
[AC_REQUIRE([CF_WITH_CURSES_DIR])

AC_PROVIDE([CF_CURSES_CPPFLAGS])dnl
cf_ncuhdr_root=ifelse($1,,ncurses,$1)

test -n "$cf_cv_curses_dir" && \
test "$cf_cv_curses_dir" != "no" && { \
  CF_ADD_INCDIR($cf_cv_curses_dir/include/$cf_ncuhdr_root)
}

AC_CACHE_CHECK(for $cf_ncuhdr_root header in include-path, cf_cv_ncurses_h,[
	cf_header_list="$cf_ncuhdr_root/curses.h $cf_ncuhdr_root/ncurses.h"
	( test "$cf_ncuhdr_root" = ncurses || test "$cf_ncuhdr_root" = ncursesw ) && cf_header_list="$cf_header_list curses.h ncurses.h"
	for cf_header in $cf_header_list
	do
		CF_NCURSES_CC_CHECK(cf_cv_ncurses_h,$cf_header,$1)
		test "$cf_cv_ncurses_h" != no && break
	done
])

CF_NCURSES_HEADER
CF_TERM_HEADER

# some applications need this, but should check for NCURSES_VERSION
AC_DEFINE(NCURSES)

CF_NCURSES_VERSION
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_HEADER version: 2 updated: 2008/03/23 14:48:54
dnl -----------------
dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
dnl variations of ncurses' installs.
dnl
dnl See also CF_CURSES_HEADER, which sets the same cache variable.
AC_DEFUN([CF_NCURSES_HEADER],[

if test "$cf_cv_ncurses_h" != no ; then
	cf_cv_ncurses_header=$cf_cv_ncurses_h
else

AC_CACHE_CHECK(for $cf_ncuhdr_root include-path, cf_cv_ncurses_h2,[
	test -n "$verbose" && echo
	CF_HEADER_PATH(cf_search,$cf_ncuhdr_root)
	test -n "$verbose" && echo search path $cf_search
	cf_save2_CPPFLAGS="$CPPFLAGS"
	for cf_incdir in $cf_search
	do
		CF_ADD_INCDIR($cf_incdir)
		for cf_header in \
			ncurses.h \
			curses.h
		do
			CF_NCURSES_CC_CHECK(cf_cv_ncurses_h2,$cf_header,$1)
			if test "$cf_cv_ncurses_h2" != no ; then
				cf_cv_ncurses_h2=$cf_incdir/$cf_header
				test -n "$verbose" && echo $ac_n "	... found $ac_c" 1>&AC_FD_MSG
				break
			fi
			test -n "$verbose" && echo "	... tested $cf_incdir/$cf_header" 1>&AC_FD_MSG
		done
		CPPFLAGS="$cf_save2_CPPFLAGS"
		test "$cf_cv_ncurses_h2" != no && break
	done
	test "$cf_cv_ncurses_h2" = no && AC_MSG_ERROR(not found)
	])

	CF_DIRNAME(cf_1st_incdir,$cf_cv_ncurses_h2)
	cf_cv_ncurses_header=`basename $cf_cv_ncurses_h2`
	if test `basename $cf_1st_incdir` = $cf_ncuhdr_root ; then
		cf_cv_ncurses_header=$cf_ncuhdr_root/$cf_cv_ncurses_header
	fi
	CF_ADD_INCDIR($cf_1st_incdir)

fi

# Set definitions to allow ifdef'ing for ncurses.h

case $cf_cv_ncurses_header in # (vi
*ncurses.h)
	AC_DEFINE(HAVE_NCURSES_H)
	;;
esac

case $cf_cv_ncurses_header in # (vi
ncurses/curses.h|ncurses/ncurses.h)
	AC_DEFINE(HAVE_NCURSES_NCURSES_H)
	;;
ncursesw/curses.h|ncursesw/ncurses.h)
	AC_DEFINE(HAVE_NCURSESW_NCURSES_H)
	;;
esac

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_LIBS version: 16 updated: 2010/11/20 17:02:38
dnl ---------------
dnl Look for the ncurses library.  This is a little complicated on Linux,
dnl because it may be linked with the gpm (general purpose mouse) library.
dnl Some distributions have gpm linked with (bsd) curses, which makes it
dnl unusable with ncurses.  However, we don't want to link with gpm unless
dnl ncurses has a dependency, since gpm is normally set up as a shared library,
dnl and the linker will record a dependency.
dnl
dnl The optional parameter gives the root name of the library, in case it is
dnl not installed as the default curses library.  That is how the
dnl wide-character version of ncurses is installed.
AC_DEFUN([CF_NCURSES_LIBS],
[AC_REQUIRE([CF_NCURSES_CPPFLAGS])

cf_nculib_root=ifelse($1,,ncurses,$1)
	# This works, except for the special case where we find gpm, but
	# ncurses is in a nonstandard location via $LIBS, and we really want
	# to link gpm.
cf_ncurses_LIBS=""
cf_ncurses_SAVE="$LIBS"
AC_CHECK_LIB(gpm,Gpm_Open,
	[AC_CHECK_LIB(gpm,initscr,
		[LIBS="$cf_ncurses_SAVE"],
		[cf_ncurses_LIBS="-lgpm"])])

case $host_os in #(vi
freebsd*)
	# This is only necessary if you are linking against an obsolete
	# version of ncurses (but it should do no harm, since it's static).
	if test "$cf_nculib_root" = ncurses ; then
		AC_CHECK_LIB(mytinfo,tgoto,[cf_ncurses_LIBS="-lmytinfo $cf_ncurses_LIBS"])
	fi
	;;
esac

CF_ADD_LIBS($cf_ncurses_LIBS)

if ( test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no" )
then
	CF_ADD_LIBS(-l$cf_nculib_root)
else
	CF_FIND_LIBRARY($cf_nculib_root,$cf_nculib_root,
		[#include <${cf_cv_ncurses_header:-curses.h}>],
		[initscr()],
		initscr)
fi

if test -n "$cf_ncurses_LIBS" ; then
	AC_MSG_CHECKING(if we can link $cf_nculib_root without $cf_ncurses_LIBS)
	cf_ncurses_SAVE="$LIBS"
	for p in $cf_ncurses_LIBS ; do
		q=`echo $LIBS | sed -e "s%$p %%" -e "s%$p$%%"`
		if test "$q" != "$LIBS" ; then
			LIBS="$q"
		fi
	done
	AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
		[initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
		[AC_MSG_RESULT(yes)],
		[AC_MSG_RESULT(no)
		 LIBS="$cf_ncurses_SAVE"])
fi

CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_nculib_root)
AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_VERSION version: 13 updated: 2010/10/23 15:54:49
dnl ------------------
dnl Check for the version of ncurses, to aid in reporting bugs, etc.
dnl Call CF_CURSES_CPPFLAGS first, or CF_NCURSES_CPPFLAGS.  We don't use
dnl AC_REQUIRE since that does not work with the shell's if/then/else/fi.
AC_DEFUN([CF_NCURSES_VERSION],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_CACHE_CHECK(for ncurses version, cf_cv_ncurses_version,[
	cf_cv_ncurses_version=no
	cf_tempfile=out$$
	rm -f $cf_tempfile
	AC_TRY_RUN([
#include <${cf_cv_ncurses_header:-curses.h}>
#include <stdio.h>
int main()
{
	FILE *fp = fopen("$cf_tempfile", "w");
#ifdef NCURSES_VERSION
# ifdef NCURSES_VERSION_PATCH
	fprintf(fp, "%s.%d\n", NCURSES_VERSION, NCURSES_VERSION_PATCH);
# else
	fprintf(fp, "%s\n", NCURSES_VERSION);
# endif
#else
# ifdef __NCURSES_H
	fprintf(fp, "old\n");
# else
	make an error
# endif
#endif
	${cf_cv_main_return:-return}(0);
}],[
	cf_cv_ncurses_version=`cat $cf_tempfile`],,[

	# This will not work if the preprocessor splits the line after the
	# Autoconf token.  The 'unproto' program does that.
	cat > conftest.$ac_ext <<EOF
#include <${cf_cv_ncurses_header:-curses.h}>
#undef Autoconf
#ifdef NCURSES_VERSION
Autoconf NCURSES_VERSION
#else
#ifdef __NCURSES_H
Autoconf "old"
#endif
;
#endif
EOF
	cf_try="$ac_cpp conftest.$ac_ext 2>&AC_FD_CC | grep '^Autoconf ' >conftest.out"
	AC_TRY_EVAL(cf_try)
	if test -f conftest.out ; then
		cf_out=`cat conftest.out | sed -e 's%^Autoconf %%' -e 's%^[[^"]]*"%%' -e 's%".*%%'`
		test -n "$cf_out" && cf_cv_ncurses_version="$cf_out"
		rm -f conftest.out
	fi
])
	rm -f $cf_tempfile
])
test "$cf_cv_ncurses_version" = no || AC_DEFINE(NCURSES)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NO_LEAKS_OPTION version: 4 updated: 2006/12/16 14:24:05
dnl ------------------
dnl see CF_WITH_NO_LEAKS
AC_DEFUN([CF_NO_LEAKS_OPTION],[
AC_MSG_CHECKING(if you want to use $1 for testing)
AC_ARG_WITH($1,
	[$2],
	[AC_DEFINE($3)ifelse([$4],,[
	 $4
])
	: ${with_cflags:=-g}
	: ${with_no_leaks:=yes}
	 with_$1=yes],
	[with_$1=])
AC_MSG_RESULT(${with_$1:-no})

case .$with_cflags in #(vi
.*-g*)
	case .$CFLAGS in #(vi
	.*-g*) #(vi
		;;
	*)
		CF_ADD_CFLAGS([-g])
		;;
	esac
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_OUR_MESSAGES version: 7 updated: 2004/09/12 19:45:55
dnl ---------------
dnl Check if we use the messages included with this program
dnl
dnl $1 specifies either Makefile or makefile, defaulting to the former.
dnl
dnl Sets variables which can be used to substitute in makefiles:
dnl	MSG_DIR_MAKE - to make ./po directory
dnl	SUB_MAKEFILE - makefile in ./po directory (see CF_BUNDLED_INTL)
dnl
AC_DEFUN([CF_OUR_MESSAGES],
[
cf_makefile=ifelse($1,,Makefile,$1)

use_our_messages=no
if test "$USE_NLS" = yes ; then
if test -d $srcdir/po ; then
AC_MSG_CHECKING(if we should use included message-library)
	AC_ARG_ENABLE(included-msgs,
	[  --disable-included-msgs use included messages, for i18n support],
	[use_our_messages=$enableval],
	[use_our_messages=yes])
fi
AC_MSG_RESULT($use_our_messages)
fi

MSG_DIR_MAKE="#"
if test "$use_our_messages" = yes
then
	SUB_MAKEFILE="$SUB_MAKEFILE po/$cf_makefile.in:$srcdir/po/$cf_makefile.inn"
	MSG_DIR_MAKE=
fi

AC_SUBST(MSG_DIR_MAKE)
AC_SUBST(SUB_MAKEFILE)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PATHSEP version: 5 updated: 2010/05/26 05:38:42
dnl ----------
dnl Provide a value for the $PATH and similar separator
AC_DEFUN([CF_PATHSEP],
[
	case $cf_cv_system_name in
	os2*)	PATH_SEPARATOR=';'  ;;
	*)	PATH_SEPARATOR=':'  ;;
	esac
ifelse([$1],,,[$1=$PATH_SEPARATOR])
	AC_SUBST(PATH_SEPARATOR)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PATH_SYNTAX version: 13 updated: 2010/05/26 05:38:42
dnl --------------
dnl Check the argument to see that it looks like a pathname.  Rewrite it if it
dnl begins with one of the prefix/exec_prefix variables, and then again if the
dnl result begins with 'NONE'.  This is necessary to work around autoconf's
dnl delayed evaluation of those symbols.
AC_DEFUN([CF_PATH_SYNTAX],[
if test "x$prefix" != xNONE; then
  cf_path_syntax="$prefix"
else
  cf_path_syntax="$ac_default_prefix"
fi

case ".[$]$1" in #(vi
.\[$]\(*\)*|.\'*\'*) #(vi
  ;;
..|./*|.\\*) #(vi
  ;;
.[[a-zA-Z]]:[[\\/]]*) #(vi OS/2 EMX
  ;;
.\[$]{*prefix}*) #(vi
  eval $1="[$]$1"
  case ".[$]$1" in #(vi
  .NONE/*)
    $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
    ;;
  esac
  ;; #(vi
.no|.NONE/*)
  $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
  ;;
*)
  ifelse([$2],,[AC_MSG_ERROR([expected a pathname, not \"[$]$1\"])],$2)
  ;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_POSIX_C_SOURCE version: 8 updated: 2010/05/26 05:38:42
dnl -----------------
dnl Define _POSIX_C_SOURCE to the given level, and _POSIX_SOURCE if needed.
dnl
dnl	POSIX.1-1990				_POSIX_SOURCE
dnl	POSIX.1-1990 and			_POSIX_SOURCE and
dnl		POSIX.2-1992 C-Language			_POSIX_C_SOURCE=2
dnl		Bindings Option
dnl	POSIX.1b-1993				_POSIX_C_SOURCE=199309L
dnl	POSIX.1c-1996				_POSIX_C_SOURCE=199506L
dnl	X/Open 2000				_POSIX_C_SOURCE=200112L
dnl
dnl Parameters:
dnl	$1 is the nominal value for _POSIX_C_SOURCE
AC_DEFUN([CF_POSIX_C_SOURCE],
[
cf_POSIX_C_SOURCE=ifelse([$1],,199506L,[$1])

cf_save_CFLAGS="$CFLAGS"
cf_save_CPPFLAGS="$CPPFLAGS"

CF_REMOVE_DEFINE(cf_trim_CFLAGS,$cf_save_CFLAGS,_POSIX_C_SOURCE)
CF_REMOVE_DEFINE(cf_trim_CPPFLAGS,$cf_save_CPPFLAGS,_POSIX_C_SOURCE)

AC_CACHE_CHECK(if we should define _POSIX_C_SOURCE,cf_cv_posix_c_source,[
	CF_MSG_LOG(if the symbol is already defined go no further)
	AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _POSIX_C_SOURCE
make an error
#endif],
	[cf_cv_posix_c_source=no],
	[cf_want_posix_source=no
	 case .$cf_POSIX_C_SOURCE in #(vi
	 .[[12]]??*) #(vi
		cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
		;;
	 .2) #(vi
		cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
		cf_want_posix_source=yes
		;;
	 .*)
		cf_want_posix_source=yes
		;;
	 esac
	 if test "$cf_want_posix_source" = yes ; then
		AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _POSIX_SOURCE
make an error
#endif],[],
		cf_cv_posix_c_source="$cf_cv_posix_c_source -D_POSIX_SOURCE")
	 fi
	 CF_MSG_LOG(ifdef from value $cf_POSIX_C_SOURCE)
	 CFLAGS="$cf_trim_CFLAGS"
	 CPPFLAGS="$cf_trim_CPPFLAGS $cf_cv_posix_c_source"
	 CF_MSG_LOG(if the second compile does not leave our definition intact error)
	 AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _POSIX_C_SOURCE
make an error
#endif],,
	 [cf_cv_posix_c_source=no])
	 CFLAGS="$cf_save_CFLAGS"
	 CPPFLAGS="$cf_save_CPPFLAGS"
	])
])

if test "$cf_cv_posix_c_source" != no ; then
	CFLAGS="$cf_trim_CFLAGS"
	CPPFLAGS="$cf_trim_CPPFLAGS"
	CF_ADD_CFLAGS($cf_cv_posix_c_source)
fi

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_CC_U_D version: 1 updated: 2005/07/14 16:59:30
dnl --------------
dnl Check if C (preprocessor) -U and -D options are processed in the order
dnl given rather than by type of option.  Some compilers insist on apply all
dnl of the -U options after all of the -D options.  Others allow mixing them,
dnl and may predefine symbols that conflict with those we define.
AC_DEFUN([CF_PROG_CC_U_D],
[
AC_CACHE_CHECK(if $CC -U and -D options work together,cf_cv_cc_u_d_options,[
	cf_save_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-UU_D_OPTIONS -DU_D_OPTIONS -DD_U_OPTIONS -UD_U_OPTIONS"
	AC_TRY_COMPILE([],[
#ifndef U_D_OPTIONS
make an undefined-error
#endif
#ifdef  D_U_OPTIONS
make a defined-error
#endif
	],[
	cf_cv_cc_u_d_options=yes],[
	cf_cv_cc_u_d_options=no])
	CPPFLAGS="$cf_save_CPPFLAGS"
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_EXT version: 10 updated: 2004/01/03 19:28:18
dnl -----------
dnl Compute $PROG_EXT, used for non-Unix ports, such as OS/2 EMX.
AC_DEFUN([CF_PROG_EXT],
[
AC_REQUIRE([CF_CHECK_CACHE])
case $cf_cv_system_name in
os2*)
    CFLAGS="$CFLAGS -Zmt"
    CPPFLAGS="$CPPFLAGS -D__ST_MT_ERRNO__"
    CXXFLAGS="$CXXFLAGS -Zmt"
    # autoconf's macro sets -Zexe and suffix both, which conflict:w
    LDFLAGS="$LDFLAGS -Zmt -Zcrtdll"
    ac_cv_exeext=.exe
    ;;
esac

AC_EXEEXT
AC_OBJEXT

PROG_EXT="$EXEEXT"
AC_SUBST(PROG_EXT)
test -n "$PROG_EXT" && AC_DEFINE_UNQUOTED(PROG_EXT,"$PROG_EXT")
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_REMOVE_DEFINE version: 3 updated: 2010/01/09 11:05:50
dnl ----------------
dnl Remove all -U and -D options that refer to the given symbol from a list
dnl of C compiler options.  This works around the problem that not all
dnl compilers process -U and -D options from left-to-right, so a -U option
dnl cannot be used to cancel the effect of a preceding -D option.
dnl
dnl $1 = target (which could be the same as the source variable)
dnl $2 = source (including '$')
dnl $3 = symbol to remove
define([CF_REMOVE_DEFINE],
[
$1=`echo "$2" | \
	sed	-e 's/-[[UD]]'"$3"'\(=[[^ 	]]*\)\?[[ 	]]/ /g' \
		-e 's/-[[UD]]'"$3"'\(=[[^ 	]]*\)\?[$]//g'`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_RPATH_HACK version: 9 updated: 2011/02/13 13:31:33
dnl -------------
AC_DEFUN([CF_RPATH_HACK],
[
AC_REQUIRE([CF_LD_RPATH_OPT])
AC_MSG_CHECKING(for updated LDFLAGS)
if test -n "$LD_RPATH_OPT" ; then
	AC_MSG_RESULT(maybe)

	AC_CHECK_PROGS(cf_ldd_prog,ldd,no)
	cf_rpath_list="/usr/lib /lib"
	if test "$cf_ldd_prog" != no
	then
		cf_rpath_oops=

AC_TRY_LINK([#include <stdio.h>],
		[printf("Hello");],
		[cf_rpath_oops=`$cf_ldd_prog conftest$ac_exeext | fgrep ' not found' | sed -e 's% =>.*$%%' |sort -u`
		 cf_rpath_list=`$cf_ldd_prog conftest$ac_exeext | fgrep / | sed -e 's%^.*[[ 	]]/%/%' -e 's%/[[^/]][[^/]]*$%%' |sort -u`])

		# If we passed the link-test, but get a "not found" on a given library,
		# this could be due to inept reconfiguration of gcc to make it only
		# partly honor /usr/local/lib (or whatever).  Sometimes this behavior
		# is intentional, e.g., installing gcc in /usr/bin and suppressing the
		# /usr/local libraries.
		if test -n "$cf_rpath_oops"
		then
			for cf_rpath_src in $cf_rpath_oops
			do
				for cf_rpath_dir in \
					/usr/local \
					/usr/pkg \
					/opt/sfw
				do
					if test -f $cf_rpath_dir/lib/$cf_rpath_src
					then
						CF_VERBOSE(...adding -L$cf_rpath_dir/lib to LDFLAGS for $cf_rpath_src)
						LDFLAGS="$LDFLAGS -L$cf_rpath_dir/lib"
						break
					fi
				done
			done
		fi
	fi

	CF_VERBOSE(...checking EXTRA_LDFLAGS $EXTRA_LDFLAGS)

	CF_RPATH_HACK_2(LDFLAGS)
	CF_RPATH_HACK_2(LIBS)

	CF_VERBOSE(...checked EXTRA_LDFLAGS $EXTRA_LDFLAGS)
fi
AC_SUBST(EXTRA_LDFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_RPATH_HACK_2 version: 6 updated: 2010/04/17 16:31:24
dnl ---------------
dnl Do one set of substitutions for CF_RPATH_HACK, adding an rpath option to
dnl EXTRA_LDFLAGS for each -L option found.
dnl
dnl $cf_rpath_list contains a list of directories to ignore.
dnl
dnl $1 = variable name to update.  The LDFLAGS variable should be the only one,
dnl      but LIBS often has misplaced -L options.
AC_DEFUN([CF_RPATH_HACK_2],
[
CF_VERBOSE(...checking $1 [$]$1)

cf_rpath_dst=
for cf_rpath_src in [$]$1
do
	case $cf_rpath_src in #(vi
	-L*) #(vi

		# check if this refers to a directory which we will ignore
		cf_rpath_skip=no
		if test -n "$cf_rpath_list"
		then
			for cf_rpath_item in $cf_rpath_list
			do
				if test "x$cf_rpath_src" = "x-L$cf_rpath_item"
				then
					cf_rpath_skip=yes
					break
				fi
			done
		fi

		if test "$cf_rpath_skip" = no
		then
			# transform the option
			if test "$LD_RPATH_OPT" = "-R " ; then
				cf_rpath_tmp=`echo "$cf_rpath_src" |sed -e "s%-L%-R %"`
			else
				cf_rpath_tmp=`echo "$cf_rpath_src" |sed -e "s%-L%$LD_RPATH_OPT%"`
			fi

			# if we have not already added this, add it now
			cf_rpath_tst=`echo "$EXTRA_LDFLAGS" | sed -e "s%$cf_rpath_tmp %%"`
			if test "x$cf_rpath_tst" = "x$EXTRA_LDFLAGS"
			then
				CF_VERBOSE(...Filter $cf_rpath_src ->$cf_rpath_tmp)
				EXTRA_LDFLAGS="$cf_rpath_tmp $EXTRA_LDFLAGS"
			fi
		fi
		;;
	esac
	cf_rpath_dst="$cf_rpath_dst $cf_rpath_src"
done
$1=$cf_rpath_dst

CF_VERBOSE(...checked $1 [$]$1)
AC_SUBST(EXTRA_LDFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SUBDIR_PATH version: 6 updated: 2010/04/21 06:20:50
dnl --------------
dnl Construct a search-list for a nonstandard header/lib-file
dnl	$1 = the variable to return as result
dnl	$2 = the package name
dnl	$3 = the subdirectory, e.g., bin, include or lib
AC_DEFUN([CF_SUBDIR_PATH],
[
$1=

CF_ADD_SUBDIR_PATH($1,$2,$3,/usr,$prefix)
CF_ADD_SUBDIR_PATH($1,$2,$3,$prefix,NONE)
CF_ADD_SUBDIR_PATH($1,$2,$3,/usr/local,$prefix)
CF_ADD_SUBDIR_PATH($1,$2,$3,/opt,$prefix)
CF_ADD_SUBDIR_PATH($1,$2,$3,[$]HOME,$prefix)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SUBST version: 4 updated: 2006/06/17 12:33:03
dnl --------
dnl	Shorthand macro for substituting things that the user may override
dnl	with an environment variable.
dnl
dnl	$1 = long/descriptive name
dnl	$2 = environment variable
dnl	$3 = default value
AC_DEFUN([CF_SUBST],
[AC_CACHE_VAL(cf_cv_subst_$2,[
AC_MSG_CHECKING(for $1 (symbol $2))
CF_SUBST_IF([-z "[$]$2"], [$2], [$3])
cf_cv_subst_$2=[$]$2
AC_MSG_RESULT([$]$2)
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SYSTYPE version: 3 updated: 2001/02/03 00:14:59
dnl ----------
dnl Derive the system-type (our main clue to the method of building shared
dnl libraries).
AC_DEFUN([CF_SYSTYPE],
[
AC_MSG_CHECKING(for system type)
AC_CACHE_VAL(cf_cv_systype,[
AC_ARG_WITH(system-type,
[  --with-system-type=XXX  test: override derived host system-type],
[cf_cv_systype=$withval],
[
cf_cv_systype="`(uname -s || hostname || echo unknown) 2>/dev/null |sed -e s'/[[:\/.-]]/_/'g  | sed 1q`"
if test -z "$cf_cv_systype"; then cf_cv_systype=unknown;fi
])])
AC_MSG_RESULT($cf_cv_systype)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SYS_NAME version: 3 updated: 2008/03/23 14:48:54
dnl -----------
dnl Derive the system name, as a check for reusing the autoconf cache
AC_DEFUN([CF_SYS_NAME],
[
SYS_NAME=`(uname -s -r || uname -a || hostname) 2>/dev/null | sed 1q`
test -z "$SYS_NAME" && SYS_NAME=unknown
AC_DEFINE_UNQUOTED(SYS_NAME,"$SYS_NAME")

AC_CACHE_VAL(cf_cv_system_name,[cf_cv_system_name="$SYS_NAME"])

if test ".$SYS_NAME" != ".$cf_cv_system_name" ; then
	AC_MSG_RESULT("Cached system name does not agree with actual")
	AC_MSG_ERROR("Please remove config.cache and try again.")
fi])
dnl ---------------------------------------------------------------------------
dnl CF_TERM_HEADER version: 2 updated: 2010/10/23 15:54:49
dnl --------------
dnl Look for term.h, which is part of X/Open curses.  It defines the interface
dnl to terminfo database.  Usually it is in the same include-path as curses.h,
dnl but some packagers change this, breaking various applications.
AC_DEFUN([CF_TERM_HEADER],[
AC_CACHE_CHECK(for terminfo header, cf_cv_term_header,[
case ${cf_cv_ncurses_header} in #(vi
*/ncurses.h|*/ncursesw.h) #(vi
	cf_term_header=`echo "$cf_cv_ncurses_header" | sed -e 's%ncurses[[^.]]*\.h$%term.h%'`
	;;
*)
	cf_term_header=term.h
	;;
esac

for cf_test in $cf_term_header "ncurses/term.h" "ncursesw/term.h"
do
AC_TRY_COMPILE([#include <stdio.h>
#include <${cf_cv_ncurses_header:-curses.h}>
#include <$cf_test>
],[int x = auto_left_margin],[
	cf_cv_term_header="$cf_test"],[
	cf_cv_term_header=unknown
	])
	test "$cf_cv_term_header" != unknown && break
done
])

# Set definitions to allow ifdef'ing to accommodate subdirectories

case $cf_cv_term_header in # (vi
*term.h)
	AC_DEFINE(HAVE_TERM_H)
	;;
esac

case $cf_cv_term_header in # (vi
ncurses/term.h) #(vi
	AC_DEFINE(HAVE_NCURSES_TERM_H)
	;;
ncursesw/term.h)
	AC_DEFINE(HAVE_NCURSESW_TERM_H)
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_UNION_WAIT version: 5 updated: 1997/11/23 14:49:44
dnl -------------
dnl Check to see if the BSD-style union wait is declared.  Some platforms may
dnl use this, though it is deprecated in favor of the 'int' type in Posix.
dnl Some vendors provide a bogus implementation that declares union wait, but
dnl uses the 'int' type instead; we try to spot these by checking for the
dnl associated macros.
dnl
dnl Ahem.  Some implementers cast the status value to an int*, as an attempt to
dnl use the macros for either union wait or int.  So we do a check compile to
dnl see if the macros are defined and apply to an int.
dnl
dnl Sets: $cf_cv_type_unionwait
dnl Defines: HAVE_TYPE_UNIONWAIT
AC_DEFUN([CF_UNION_WAIT],
[
AC_REQUIRE([CF_WAIT_HEADERS])
AC_MSG_CHECKING([for union wait])
AC_CACHE_VAL(cf_cv_type_unionwait,[
	AC_TRY_LINK($cf_wait_headers,
	[int x;
	 int y = WEXITSTATUS(x);
	 int z = WTERMSIG(x);
	 wait(&x);
	],
	[cf_cv_type_unionwait=no
	 echo compiles ok w/o union wait 1>&AC_FD_CC
	],[
	AC_TRY_LINK($cf_wait_headers,
	[union wait x;
#ifdef WEXITSTATUS
	 int y = WEXITSTATUS(x);
#endif
#ifdef WTERMSIG
	 int z = WTERMSIG(x);
#endif
	 wait(&x);
	],
	[cf_cv_type_unionwait=yes
	 echo compiles ok with union wait and possibly macros too 1>&AC_FD_CC
	],
	[cf_cv_type_unionwait=no])])])
AC_MSG_RESULT($cf_cv_type_unionwait)
test $cf_cv_type_unionwait = yes && AC_DEFINE(HAVE_TYPE_UNIONWAIT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_UPPER version: 5 updated: 2001/01/29 23:40:59
dnl --------
dnl Make an uppercase version of a variable
dnl $1=uppercase($2)
AC_DEFUN([CF_UPPER],
[
$1=`echo "$2" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_UTF8_LIB version: 7 updated: 2010/06/20 09:24:28
dnl -----------
dnl Check for multibyte support, and if not found, utf8 compatibility library
AC_DEFUN([CF_UTF8_LIB],
[
AC_CACHE_CHECK(for multibyte character support,cf_cv_utf8_lib,[
	cf_save_LIBS="$LIBS"
	AC_TRY_LINK([
#include <stdlib.h>],[putwc(0,0);],
	[cf_cv_utf8_lib=yes],
	[CF_FIND_LINKAGE([
#include <libutf8.h>],[putwc(0,0);],utf8,
		[cf_cv_utf8_lib=add-on],
		[cf_cv_utf8_lib=no])
])])

# HAVE_LIBUTF8_H is used by ncurses if curses.h is shared between
# ncurses/ncursesw:
if test "$cf_cv_utf8_lib" = "add-on" ; then
	AC_DEFINE(HAVE_LIBUTF8_H)
	CF_ADD_INCDIR($cf_cv_header_path_utf8)
	CF_ADD_LIBDIR($cf_cv_library_path_utf8)
	CF_ADD_LIBS($cf_cv_library_file_utf8)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_VERBOSE version: 3 updated: 2007/07/29 09:55:12
dnl ----------
dnl Use AC_VERBOSE w/o the warnings
AC_DEFUN([CF_VERBOSE],
[test -n "$verbose" && echo "	$1" 1>&AC_FD_MSG
CF_MSG_LOG([$1])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_VERSION_INFO version: 4 updated: 2011/01/02 19:09:47
dnl ---------------
dnl Define several useful symbols derived from the VERSION file.  A separate
dnl file is preferred to embedding the version numbers in various scripts.
dnl (automake is a textbook-example of why the latter is a bad idea, but there
dnl are others).
dnl
dnl The file contents are:
dnl	libtool-version	release-version	patch-version
dnl or
dnl	release-version
dnl where
dnl	libtool-version (see ?) consists of 3 integers separated by '.'
dnl	release-version consists of a major version and minor version
dnl		separated by '.', optionally followed by a patch-version
dnl		separated by '-'.  The minor version need not be an
dnl		integer (but it is preferred).
dnl	patch-version is an integer in the form yyyymmdd, so ifdef's and
dnl		scripts can easily compare versions.
dnl
dnl If libtool is used, the first form is required, since CF_WITH_LIBTOOL
dnl simply extracts the first field using 'cut -f1'.
dnl
dnl Optional parameters:
dnl $1 = internal name for package
dnl $2 = external name for package
AC_DEFUN([CF_VERSION_INFO],
[
if test -f $srcdir/VERSION ; then
	AC_MSG_CHECKING(for package version)

	# if there are not enough fields, cut returns the last one...
	cf_field1=`sed -e '2,$d' $srcdir/VERSION|cut -f1`
	cf_field2=`sed -e '2,$d' $srcdir/VERSION|cut -f2`
	cf_field3=`sed -e '2,$d' $srcdir/VERSION|cut -f3`

	# this is how CF_BUNDLED_INTL uses $VERSION:
	VERSION="$cf_field1"

	VERSION_MAJOR=`echo "$cf_field2" | sed -e 's/\..*//'`
	test -z "$VERSION_MAJOR" && AC_MSG_ERROR(missing major-version)

	VERSION_MINOR=`echo "$cf_field2" | sed -e 's/^[[^.]]*\.//' -e 's/-.*//'`
	test -z "$VERSION_MINOR" && AC_MSG_ERROR(missing minor-version)

	AC_MSG_RESULT(${VERSION_MAJOR}.${VERSION_MINOR})

	AC_MSG_CHECKING(for package patch date)
	VERSION_PATCH=`echo "$cf_field3" | sed -e 's/^[[^-]]*-//'`
	case .$VERSION_PATCH in
	.)
		AC_MSG_ERROR(missing patch-date $VERSION_PATCH)
		;;
	.[[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]])
		;;
	*)
		AC_MSG_ERROR(illegal patch-date $VERSION_PATCH)
		;;
	esac
	AC_MSG_RESULT($VERSION_PATCH)
else
	AC_MSG_ERROR(did not find $srcdir/VERSION)
fi

# show the actual data that we have for versions:
CF_VERBOSE(VERSION $VERSION)
CF_VERBOSE(VERSION_MAJOR $VERSION_MAJOR)
CF_VERBOSE(VERSION_MINOR $VERSION_MINOR)
CF_VERBOSE(VERSION_PATCH $VERSION_PATCH)

AC_SUBST(VERSION)
AC_SUBST(VERSION_MAJOR)
AC_SUBST(VERSION_MINOR)
AC_SUBST(VERSION_PATCH)

dnl if a package name is given, define its corresponding version info.  We
dnl need the package name to ensure that the defined symbols are unique.
ifelse($1,,,[
	cf_PACKAGE=$1
	PACKAGE=ifelse($2,,$1,$2)
	AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
	AC_SUBST(PACKAGE)
	CF_UPPER(cf_PACKAGE,$cf_PACKAGE)
	AC_DEFINE_UNQUOTED(${cf_PACKAGE}_VERSION,"${VERSION_MAJOR}.${VERSION_MINOR}")
	AC_DEFINE_UNQUOTED(${cf_PACKAGE}_PATCHDATE,${VERSION_PATCH})
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WAIT_HEADERS version: 2 updated: 1997/10/21 19:45:33
dnl ---------------
dnl Build up an expression $cf_wait_headers with the header files needed to
dnl compile against the prototypes for 'wait()', 'waitpid()', etc.  Assume it's
dnl Posix, which uses <sys/types.h> and <sys/wait.h>, but allow SVr4 variation
dnl with <wait.h>.
AC_DEFUN([CF_WAIT_HEADERS],
[
AC_HAVE_HEADERS(sys/wait.h)
cf_wait_headers="#include <sys/types.h>
"
if test $ac_cv_header_sys_wait_h = yes; then
cf_wait_headers="$cf_wait_headers
#include <sys/wait.h>
"
else
AC_HAVE_HEADERS(wait.h)
AC_HAVE_HEADERS(waitstatus.h)
if test $ac_cv_header_wait_h = yes; then
cf_wait_headers="$cf_wait_headers
#include <wait.h>
"
fi
if test $ac_cv_header_waitstatus_h = yes; then
cf_wait_headers="$cf_wait_headers
#include <waitstatus.h>
"
fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_CURSES_DIR version: 3 updated: 2010/11/20 17:02:38
dnl ------------------
dnl Wrapper for AC_ARG_WITH to specify directory under which to look for curses
dnl libraries.
AC_DEFUN([CF_WITH_CURSES_DIR],[

AC_MSG_CHECKING(for specific curses-directory)
AC_ARG_WITH(curses-dir,
	[  --with-curses-dir=DIR   directory in which (n)curses is installed],
	[cf_cv_curses_dir=$withval],
	[cf_cv_curses_dir=no])
AC_MSG_RESULT($cf_cv_curses_dir)

if ( test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no" )
then
	CF_PATH_SYNTAX(withval)
	if test -d "$cf_cv_curses_dir"
	then
		CF_ADD_INCDIR($cf_cv_curses_dir/include)
		CF_ADD_LIBDIR($cf_cv_curses_dir/lib)
	fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_DBMALLOC version: 7 updated: 2010/06/21 17:26:47
dnl ----------------
dnl Configure-option for dbmalloc.  The optional parameter is used to override
dnl the updating of $LIBS, e.g., to avoid conflict with subsequent tests.
AC_DEFUN([CF_WITH_DBMALLOC],[
CF_NO_LEAKS_OPTION(dbmalloc,
	[  --with-dbmalloc         test: use Conor Cahill's dbmalloc library],
	[USE_DBMALLOC])

if test "$with_dbmalloc" = yes ; then
	AC_CHECK_HEADER(dbmalloc.h,
		[AC_CHECK_LIB(dbmalloc,[debug_malloc]ifelse([$1],,[],[,$1]))])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_DMALLOC version: 7 updated: 2010/06/21 17:26:47
dnl ---------------
dnl Configure-option for dmalloc.  The optional parameter is used to override
dnl the updating of $LIBS, e.g., to avoid conflict with subsequent tests.
AC_DEFUN([CF_WITH_DMALLOC],[
CF_NO_LEAKS_OPTION(dmalloc,
	[  --with-dmalloc          test: use Gray Watson's dmalloc library],
	[USE_DMALLOC])

if test "$with_dmalloc" = yes ; then
	AC_CHECK_HEADER(dmalloc.h,
		[AC_CHECK_LIB(dmalloc,[dmalloc_debug]ifelse([$1],,[],[,$1]))])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_LIBTOOL version: 27 updated: 2011/06/28 18:45:38
dnl ---------------
dnl Provide a configure option to incorporate libtool.  Define several useful
dnl symbols for the makefile rules.
dnl
dnl The reference to AC_PROG_LIBTOOL does not normally work, since it uses
dnl macros from libtool.m4 which is in the aclocal directory of automake.
dnl Following is a simple script which turns on the AC_PROG_LIBTOOL macro.
dnl But that still does not work properly since the macro is expanded outside
dnl the CF_WITH_LIBTOOL macro:
dnl
dnl	#!/bin/sh
dnl	ACLOCAL=`aclocal --print-ac-dir`
dnl	if test -z "$ACLOCAL" ; then
dnl		echo cannot find aclocal directory
dnl		exit 1
dnl	elif test ! -f $ACLOCAL/libtool.m4 ; then
dnl		echo cannot find libtool.m4 file
dnl		exit 1
dnl	fi
dnl
dnl	LOCAL=aclocal.m4
dnl	ORIG=aclocal.m4.orig
dnl
dnl	trap "mv $ORIG $LOCAL" 0 1 2 5 15
dnl	rm -f $ORIG
dnl	mv $LOCAL $ORIG
dnl
dnl	# sed the LIBTOOL= assignment to omit the current directory?
dnl	sed -e 's/^LIBTOOL=.*/LIBTOOL=${LIBTOOL:-libtool}/' $ACLOCAL/libtool.m4 >>$LOCAL
dnl	cat $ORIG >>$LOCAL
dnl
dnl	autoconf-257 $*
dnl
AC_DEFUN([CF_WITH_LIBTOOL],
[
AC_REQUIRE([CF_DISABLE_LIBTOOL_VERSION])
ifdef([AC_PROG_LIBTOOL],,[
LIBTOOL=
])
# common library maintenance symbols that are convenient for libtool scripts:
LIB_CREATE='${AR} -cr'
LIB_OBJECT='${OBJECTS}'
LIB_SUFFIX=.a
LIB_PREP="$RANLIB"

# symbols used to prop libtool up to enable it to determine what it should be
# doing:
LIB_CLEAN=
LIB_COMPILE=
LIB_LINK='${CC}'
LIB_INSTALL=
LIB_UNINSTALL=

AC_MSG_CHECKING(if you want to build libraries with libtool)
AC_ARG_WITH(libtool,
	[  --with-libtool          generate libraries with libtool],
	[with_libtool=$withval],
	[with_libtool=no])
AC_MSG_RESULT($with_libtool)
if test "$with_libtool" != "no"; then
ifdef([AC_PROG_LIBTOOL],[
	# missing_content_AC_PROG_LIBTOOL{{
	AC_PROG_LIBTOOL
	# missing_content_AC_PROG_LIBTOOL}}
],[
	if test "$with_libtool" != "yes" ; then
		CF_PATH_SYNTAX(with_libtool)
		LIBTOOL=$with_libtool
	else
		AC_PATH_PROG(LIBTOOL,libtool)
	fi
	if test -z "$LIBTOOL" ; then
		AC_MSG_ERROR(Cannot find libtool)
	fi
])dnl
	LIB_CREATE='${LIBTOOL} --mode=link ${CC} -rpath ${DESTDIR}${libdir} ${LIBTOOL_VERSION} `cut -f1 ${srcdir}/VERSION` ${LIBTOOL_OPTS} ${LT_UNDEF} $(LIBS) -o'
	LIB_OBJECT='${OBJECTS:.o=.lo}'
	LIB_SUFFIX=.la
	LIB_CLEAN='${LIBTOOL} --mode=clean'
	LIB_COMPILE='${LIBTOOL} --mode=compile'
	LIB_LINK='${LIBTOOL} --mode=link ${CC} ${LIBTOOL_OPTS}'
	LIB_INSTALL='${LIBTOOL} --mode=install'
	LIB_UNINSTALL='${LIBTOOL} --mode=uninstall'
	LIB_PREP=:

	# Show the version of libtool
	AC_MSG_CHECKING(version of libtool)

	# Save the version in a cache variable - this is not entirely a good
	# thing, but the version string from libtool is very ugly, and for
	# bug reports it might be useful to have the original string. "("
	cf_cv_libtool_version=`$LIBTOOL --version 2>&1 | sed -e '/^$/d' |sed -e '2,$d' -e 's/([[^)]]*)//g' -e 's/^[[^1-9]]*//' -e 's/[[^0-9.]].*//'`
	AC_MSG_RESULT($cf_cv_libtool_version)
	if test -z "$cf_cv_libtool_version" ; then
		AC_MSG_ERROR(This is not GNU libtool)
	fi

	# special hack to add -no-undefined (which libtool should do for itself)
	LT_UNDEF=
	case "$cf_cv_system_name" in #(vi
	cygwin*|mingw32*|uwin*|aix[[456]]) #(vi
		LT_UNDEF=-no-undefined
		;;
	esac
	AC_SUBST([LT_UNDEF])

	# special hack to add --tag option for C++ compiler
	case $cf_cv_libtool_version in #(vi
	1.[[5-9]]*|[[2-9]].[[0-9.a-z]]*) #(vi
		LIBTOOL_CXX="$LIBTOOL --tag=CXX"
		LIBTOOL="$LIBTOOL --tag=CC"
		;;
	*)
		LIBTOOL_CXX="$LIBTOOL"
		;;
	esac
else
	LIBTOOL=""
	LIBTOOL_CXX=""
fi

test -z "$LIBTOOL" && ECHO_LT=

AC_SUBST(LIBTOOL)
AC_SUBST(LIBTOOL_CXX)
AC_SUBST(LIBTOOL_OPTS)

AC_SUBST(LIB_CREATE)
AC_SUBST(LIB_OBJECT)
AC_SUBST(LIB_SUFFIX)
AC_SUBST(LIB_PREP)

AC_SUBST(LIB_CLEAN)
AC_SUBST(LIB_COMPILE)
AC_SUBST(LIB_LINK)
AC_SUBST(LIB_INSTALL)
AC_SUBST(LIB_UNINSTALL)

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_LIBTOOL_OPTS version: 2 updated: 2007/04/08 18:14:54
dnl --------------------
dnl Allow user to pass additional libtool options into the library creation
dnl and link steps.  The main use for this is to do something like
dnl	./configure --with-libtool-opts=-static
dnl to get the same behavior as automake-flavored
dnl	./configure --enable-static
AC_DEFUN([CF_WITH_LIBTOOL_OPTS],[
AC_MSG_CHECKING(for additional libtool options)
AC_ARG_WITH(libtool-opts,
	[  --with-libtool-opts=XXX specify additional libtool options],
	[with_libtool_opts=$withval],
	[with_libtool_opts=no])
AC_MSG_RESULT($with_libtool_opts)

case .$with_libtool_opts in
.yes|.no|.)
	;;
*)
	LIBTOOL_OPTS=$with_libtool_opts
	;;
esac

AC_SUBST(LIBTOOL_OPTS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_NO_LEAKS version: 1 updated: 2006/12/14 18:00:21
dnl ----------------
AC_DEFUN([CF_WITH_NO_LEAKS],[

AC_REQUIRE([CF_WITH_DMALLOC])
AC_REQUIRE([CF_WITH_DBMALLOC])
AC_REQUIRE([CF_WITH_PURIFY])
AC_REQUIRE([CF_WITH_VALGRIND])

AC_MSG_CHECKING(if you want to perform memory-leak testing)
AC_ARG_WITH(no-leaks,
	[  --with-no-leaks         test: free permanent memory, analyze leaks],
	[AC_DEFINE(NO_LEAKS)
	 cf_doalloc=".${with_dmalloc}${with_dbmalloc}${with_purify}${with_valgrind}"
	 case ${cf_doalloc} in #(vi
	 *yes*) ;;
	 *) AC_DEFINE(DOALLOC,10000) ;;
	 esac
	 with_no_leaks=yes],
	[with_no_leaks=])
AC_MSG_RESULT($with_no_leaks)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_PURIFY version: 2 updated: 2006/12/14 18:43:43
dnl --------------
AC_DEFUN([CF_WITH_PURIFY],[
CF_NO_LEAKS_OPTION(purify,
	[  --with-purify           test: use Purify],
	[USE_PURIFY],
	[LINK_PREFIX="$LINK_PREFIX purify"])
AC_SUBST(LINK_PREFIX)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_VALGRIND version: 1 updated: 2006/12/14 18:00:21
dnl ----------------
AC_DEFUN([CF_WITH_VALGRIND],[
CF_NO_LEAKS_OPTION(valgrind,
	[  --with-valgrind         test: use valgrind],
	[USE_VALGRIND])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_WARNINGS version: 5 updated: 2004/07/23 14:40:34
dnl ----------------
dnl Combine the checks for gcc features into a configure-script option
dnl
dnl Parameters:
dnl	$1 - see CF_GCC_WARNINGS
AC_DEFUN([CF_WITH_WARNINGS],
[
if ( test "$GCC" = yes || test "$GXX" = yes )
then
AC_MSG_CHECKING(if you want to check for gcc warnings)
AC_ARG_WITH(warnings,
	[  --with-warnings         test: turn on gcc warnings],
	[cf_opt_with_warnings=$withval],
	[cf_opt_with_warnings=no])
AC_MSG_RESULT($cf_opt_with_warnings)
if test "$cf_opt_with_warnings" != no ; then
	CF_GCC_ATTRIBUTES
	CF_GCC_WARNINGS([$1])
fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_XOPEN_CURSES version: 11 updated: 2011/01/18 18:15:30
dnl ---------------
dnl Test if we should define X/Open source for curses, needed on Digital Unix
dnl 4.x, to see the extended functions, but breaks on IRIX 6.x.
dnl
dnl The getbegyx() check is needed for HPUX, which omits legacy macros such
dnl as getbegy().  The latter is better design, but the former is standard.
AC_DEFUN([CF_XOPEN_CURSES],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_CACHE_CHECK(if we must define _XOPEN_SOURCE_EXTENDED,cf_cv_need_xopen_extension,[
AC_TRY_LINK([
#include <stdlib.h>
#include <${cf_cv_ncurses_header:-curses.h}>],[
#if defined(NCURSES_VERSION_PATCH)
#if (NCURSES_VERSION_PATCH < 20100501) && (NCURSES_VERSION_PATCH >= 20100403)
	make an error
#endif
#endif
	long x = winnstr(stdscr, "", 0);
	int x1, y1;
	getbegyx(stdscr, y1, x1)],
	[cf_cv_need_xopen_extension=no],
	[AC_TRY_LINK([
#define _XOPEN_SOURCE_EXTENDED
#include <stdlib.h>
#include <${cf_cv_ncurses_header:-curses.h}>],[
#ifdef NCURSES_VERSION
	cchar_t check;
	int check2 = curs_set((int)sizeof(check));
#endif
	long x = winnstr(stdscr, "", 0);
	int x1, y1;
	getbegyx(stdscr, y1, x1)],
	[cf_cv_need_xopen_extension=yes],
	[cf_cv_need_xopen_extension=unknown])])])
test $cf_cv_need_xopen_extension = yes && CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_XOPEN_SOURCE version: 35 updated: 2011/02/20 20:37:37
dnl ---------------
dnl Try to get _XOPEN_SOURCE defined properly that we can use POSIX functions,
dnl or adapt to the vendor's definitions to get equivalent functionality,
dnl without losing the common non-POSIX features.
dnl
dnl Parameters:
dnl	$1 is the nominal value for _XOPEN_SOURCE
dnl	$2 is the nominal value for _POSIX_C_SOURCE
AC_DEFUN([CF_XOPEN_SOURCE],[

cf_XOPEN_SOURCE=ifelse([$1],,500,[$1])
cf_POSIX_C_SOURCE=ifelse([$2],,199506L,[$2])
cf_xopen_source=

case $host_os in #(vi
aix[[456]]*) #(vi
	cf_xopen_source="-D_ALL_SOURCE"
	;;
cygwin) #(vi
	cf_XOPEN_SOURCE=600
	;;
darwin[[0-8]].*) #(vi
	cf_xopen_source="-D_APPLE_C_SOURCE"
	;;
darwin*) #(vi
	cf_xopen_source="-D_DARWIN_C_SOURCE"
	;;
freebsd*|dragonfly*) #(vi
	# 5.x headers associate
	#	_XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
	#	_XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L
	cf_POSIX_C_SOURCE=200112L
	cf_XOPEN_SOURCE=600
	cf_xopen_source="-D_BSD_TYPES -D__BSD_VISIBLE -D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	;;
hpux11*) #(vi
	cf_xopen_source="-D_HPUX_SOURCE -D_XOPEN_SOURCE=500"
	;;
hpux*) #(vi
	cf_xopen_source="-D_HPUX_SOURCE"
	;;
irix[[56]].*) #(vi
	cf_xopen_source="-D_SGI_SOURCE"
	;;
linux*|gnu*|mint*|k*bsd*-gnu) #(vi
	CF_GNU_SOURCE
	;;
mirbsd*) #(vi
	# setting _XOPEN_SOURCE or _POSIX_SOURCE breaks <arpa/inet.h>
	;;
netbsd*) #(vi
	# setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
	;;
openbsd*) #(vi
	# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
	;;
osf[[45]]*) #(vi
	cf_xopen_source="-D_OSF_SOURCE"
	;;
nto-qnx*) #(vi
	cf_xopen_source="-D_QNX_SOURCE"
	;;
sco*) #(vi
	# setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
	;;
solaris2.1[[0-9]]) #(vi
	cf_xopen_source="-D__EXTENSIONS__ -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	;;
solaris2.[[1-9]]) #(vi
	cf_xopen_source="-D__EXTENSIONS__"
	;;
*)
	AC_CACHE_CHECK(if we should define _XOPEN_SOURCE,cf_cv_xopen_source,[
	AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_xopen_source=no],
	[cf_save="$CPPFLAGS"
	 CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	 AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_xopen_source=no],
	[cf_cv_xopen_source=$cf_XOPEN_SOURCE])
	CPPFLAGS="$cf_save"
	])
])
	if test "$cf_cv_xopen_source" != no ; then
		CF_REMOVE_DEFINE(CFLAGS,$CFLAGS,_XOPEN_SOURCE)
		CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,_XOPEN_SOURCE)
		cf_temp_xopen_source="-D_XOPEN_SOURCE=$cf_cv_xopen_source"
		CF_ADD_CFLAGS($cf_temp_xopen_source)
	fi
	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
	;;
esac

if test -n "$cf_xopen_source" ; then
	CF_ADD_CFLAGS($cf_xopen_source)
fi
])
dnl ---------------------------------------------------------------------------
dnl CF__CURSES_HEAD version: 2 updated: 2010/10/23 15:54:49
dnl ---------------
dnl Define a reusable chunk which includes <curses.h> and <term.h> when they
dnl are both available.
define([CF__CURSES_HEAD],[
#ifdef HAVE_XCURSES
#include <xcurses.h>
char * XCursesProgramName = "test";
#else
#include <${cf_cv_ncurses_header:-curses.h}>
#if defined(NCURSES_VERSION) && defined(HAVE_NCURSESW_TERM_H)
#include <ncursesw/term.h>
#elif defined(NCURSES_VERSION) && defined(HAVE_NCURSES_TERM_H)
#include <ncurses/term.h>
#elif defined(HAVE_TERM_H)
#include <term.h>
#endif
#endif
])
dnl ---------------------------------------------------------------------------
dnl CF__ICONV_BODY version: 2 updated: 2007/07/26 17:35:47
dnl --------------
dnl Test-code needed for iconv compile-checks
define([CF__ICONV_BODY],[
	iconv_t cd = iconv_open("","");
	iconv(cd,NULL,NULL,NULL,NULL);
	iconv_close(cd);]
)dnl
dnl ---------------------------------------------------------------------------
dnl CF__ICONV_HEAD version: 1 updated: 2007/07/26 15:57:03
dnl --------------
dnl Header-files needed for iconv compile-checks
define([CF__ICONV_HEAD],[
#include <stdlib.h>
#include <iconv.h>]
)dnl
dnl ---------------------------------------------------------------------------
dnl CF__INTL_BODY version: 1 updated: 2007/07/26 17:35:47
dnl -------------
dnl Test-code needed for libintl compile-checks
dnl $1 = parameter 2 from AM_WITH_NLS
define([CF__INTL_BODY],[
    bindtextdomain ("", "");
    return (int) gettext ("")
            ifelse([$1], need-ngettext, [ + (int) ngettext ("", "", 0)], [])
            [ + _nl_msg_cat_cntr]
])
dnl ---------------------------------------------------------------------------
dnl CF__INTL_HEAD version: 1 updated: 2007/07/26 17:35:47
dnl -------------
dnl Header-files needed for libintl compile-checks
define([CF__INTL_HEAD],[
#include <libintl.h>
extern int _nl_msg_cat_cntr;
])dnl
dnl ---------------------------------------------------------------------------
dnl jm_GLIBC21 version: 3 updated: 2002/10/27 23:21:42
dnl ----------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl glibc21.m4
dnl ====================
dnl serial 2
dnl
dnl Test for the GNU C Library, version 2.1 or newer.
dnl From Bruno Haible.
AC_DEFUN([jm_GLIBC21],
  [
    AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
      ac_cv_gnu_library_2_1,
      [AC_EGREP_CPP([Lucky GNU user],
	[
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
  Lucky GNU user
 #endif
#endif
	],
	ac_cv_gnu_library_2_1=yes,
	ac_cv_gnu_library_2_1=no)
      ]
    )
    AC_SUBST(GLIBC21)
    GLIBC21="$ac_cv_gnu_library_2_1"
  ]
)