xref: /dports/devel/cdk/cdk-5.0-20161210/aclocal.m4

dnl $Id: aclocal.m4,v 1.98 2016/11/20 15:18:17 tom Exp $
dnl macros used for CDK configure script
dnl ---------------------------------------------------------------------------
dnl Copyright 1999-2015,2016 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 "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, distribute
dnl with modifications, sublicense, and/or sell copies of the Software, and to
dnl permit persons to whom the Software is furnished to do so, subject to the
dnl following conditions:
dnl
dnl The above copyright notice and this permission notice shall be included in
dnl all copies or substantial portions of the Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
dnl THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl 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 sale,
dnl use or other dealings in this Software without prior written
dnl authorization.
dnl ---------------------------------------------------------------------------
dnl ---------------------------------------------------------------------------
dnl CF_ACVERSION_CHECK version: 5 updated: 2014/06/04 19:11:49
dnl ------------------
dnl Conditionally generate script according to whether we're using a given autoconf.
dnl
dnl $1 = version to compare against
dnl $2 = code to use if AC_ACVERSION is at least as high as $1.
dnl $3 = code to use if AC_ACVERSION is older than $1.
define([CF_ACVERSION_CHECK],
[
ifdef([AC_ACVERSION], ,[ifdef([AC_AUTOCONF_VERSION],[m4_copy([AC_AUTOCONF_VERSION],[AC_ACVERSION])],[m4_copy([m4_PACKAGE_VERSION],[AC_ACVERSION])])])dnl
ifdef([m4_version_compare],
[m4_if(m4_version_compare(m4_defn([AC_ACVERSION]), [$1]), -1, [$3], [$2])],
[CF_ACVERSION_COMPARE(
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])),
AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)), AC_ACVERSION, [$2], [$3])])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ACVERSION_COMPARE version: 3 updated: 2012/10/03 18:39:53
dnl --------------------
dnl CF_ACVERSION_COMPARE(MAJOR1, MINOR1, TERNARY1,
dnl                      MAJOR2, MINOR2, TERNARY2,
dnl                      PRINTABLE2, not FOUND, FOUND)
define([CF_ACVERSION_COMPARE],
[ifelse(builtin([eval], [$2 < $5]), 1,
[ifelse([$8], , ,[$8])],
[ifelse([$9], , ,[$9])])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_CFLAGS version: 12 updated: 2015/04/12 15:39:00
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
	(-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
		case $cf_add_cflags in
		(-D*)
			cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`

			test "x${cf_add_cflags}" != "x${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)
			;;
		(*)
			case $cf_add_cflags in
			(-D*)
				cf_tst_cppflags=`echo "x$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 "x${cf_add_cflags}" != "x${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: 14 updated: 2015/05/25 20:53:04
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
	  else
		break
	  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: 10 updated: 2015/04/18 08:56:57
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: 2 updated: 2014/07/13 14:33:27
dnl -----------
dnl Add one or more libraries, used to enforce consistency.  Libraries are
dnl prepended to an existing list, since their dependencies are assumed to
dnl already exist in the list.
dnl
dnl $1 = libraries to add, with the "-l", etc.
dnl $2 = variable to update (default $LIBS)
AC_DEFUN([CF_ADD_LIBS],[
cf_add_libs="$1"
# Filter out duplicates - this happens with badly-designed ".pc" files...
for cf_add_1lib in [$]ifelse($2,,LIBS,[$2])
do
	for cf_add_2lib in $cf_add_libs
	do
		if test "x$cf_add_1lib" = "x$cf_add_2lib"
		then
			cf_add_1lib=
			break
		fi
	done
	test -n "$cf_add_1lib" && cf_add_libs="$cf_add_libs $cf_add_1lib"
done
ifelse($2,,LIBS,[$2])="$cf_add_libs"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_LIB_AFTER version: 3 updated: 2013/07/09 21:27:22
dnl ----------------
dnl Add a given library after another, e.g., following the one it satisfies a
dnl dependency for.
dnl
dnl $1 = the first library
dnl $2 = its dependency
AC_DEFUN([CF_ADD_LIB_AFTER],[
CF_VERBOSE(...before $LIBS)
LIBS=`echo "$LIBS" | sed -e "s/[[ 	]][[ 	]]*/ /g" -e "s%$1 %$1 $2 %" -e 's%  % %g'`
CF_VERBOSE(...after  $LIBS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_SUBDIR_PATH version: 4 updated: 2013/10/08 17:47:05
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 "x$4" != "x$5" && \
test -d "$4" && \
ifelse([$5],NONE,,[(test -z "$5" || test x$5 = xNONE || test "x$4" != "x$5") &&]) {
	test -n "$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_ANSI_CC_CHECK version: 13 updated: 2012/10/06 11:17:15
dnl ----------------
dnl This was originally adapted from the macros 'fp_PROG_CC_STDC' and
dnl 'fp_C_PROTOTYPES' in the sharutils 4.2 distribution.
AC_DEFUN([CF_ANSI_CC_CHECK],
[
CF_CC_ENV_FLAGS

AC_CACHE_CHECK(for ${CC:-cc} option to accept ANSI C, cf_cv_ansi_cc,[
cf_cv_ansi_cc=no
cf_save_CFLAGS="$CFLAGS"
cf_save_CPPFLAGS="$CPPFLAGS"
# Don't try gcc -ansi; that turns off useful extensions and
# breaks some systems' header files.
# AIX			-qlanglvl=ansi
# Ultrix and OSF/1	-std1
# HP-UX			-Aa -D_HPUX_SOURCE
# SVR4			-Xc
# UnixWare 1.2		(cannot use -Xc, since ANSI/POSIX clashes)
for cf_arg in "-DCC_HAS_PROTOS" \
	"" \
	-qlanglvl=ansi \
	-std1 \
	-Ae \
	"-Aa -D_HPUX_SOURCE" \
	-Xc
do
	CF_ADD_CFLAGS($cf_arg)
	AC_TRY_COMPILE(
[
#ifndef CC_HAS_PROTOS
#if !defined(__STDC__) || (__STDC__ != 1)
choke me
#endif
#endif
],[
	int test (int i, double x);
	struct s1 {int (*f) (int a);};
	struct s2 {int (*f) (double a);};],
	[cf_cv_ansi_cc="$cf_arg"; break])
done
CFLAGS="$cf_save_CFLAGS"
CPPFLAGS="$cf_save_CPPFLAGS"
])

if test "$cf_cv_ansi_cc" != "no"; then
if test ".$cf_cv_ansi_cc" != ".-DCC_HAS_PROTOS"; then
	CF_ADD_CFLAGS($cf_cv_ansi_cc)
else
	AC_DEFINE(CC_HAS_PROTOS,1,[Define to 1 if C compiler supports prototypes])
fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ANSI_CC_REQD version: 4 updated: 2008/03/23 14:48:54
dnl ---------------
dnl For programs that must use an ANSI compiler, obtain compiler options that
dnl will make it recognize prototypes.  We'll do preprocessor checks in other
dnl macros, since tools such as unproto can fake prototypes, but only part of
dnl the preprocessor.
AC_DEFUN([CF_ANSI_CC_REQD],
[AC_REQUIRE([CF_ANSI_CC_CHECK])
if test "$cf_cv_ansi_cc" = "no"; then
	AC_MSG_ERROR(
[Your compiler does not appear to recognize prototypes.
You have the following choices:
	a. adjust your compiler options
	b. get an up-to-date compiler
	c. use a wrapper such as unproto])
fi
])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_OPTION version: 5 updated: 2015/05/10 19:52:14
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_CC_ENV_FLAGS version: 6 updated: 2016/08/29 20:57:00
dnl ---------------
dnl Check for user's environment-breakage by stuffing CFLAGS/CPPFLAGS content
dnl into CC.  This will not help with broken scripts that wrap the compiler
dnl with options, but eliminates a more common category of user confusion.
dnl
dnl In particular, it addresses the problem of being able to run the C
dnl preprocessor in a consistent manner.
dnl
dnl Caveat: this also disallows blanks in the pathname for the compiler, but
dnl the nuisance of having inconsistent settings for compiler and preprocessor
dnl outweighs that limitation.
AC_DEFUN([CF_CC_ENV_FLAGS],
[
# This should have been defined by AC_PROG_CC
: ${CC:=cc}

AC_MSG_CHECKING(\$CC variable)
case "$CC" in
(*[[\ \	]]-*)
	AC_MSG_RESULT(broken)
	AC_MSG_WARN(your environment misuses the CC variable to hold CFLAGS/CPPFLAGS options)
	# humor him...
	cf_flags=`echo "$CC" | sed -e 's/^.*[[ 	]]\(-[[^ 	]]\)/\1/'`
	CC=`echo "$CC " | sed -e 's/[[ 	]]-[[^ 	]].*$//' -e 's/[[ 	]]*$//'`
	for cf_arg in $cf_flags
	do
		case "x$cf_arg" in
		(x-[[IUDfgOW]]*)
			CF_ADD_CFLAGS($cf_flags)
			;;
		(*)
			CC="$CC $cf_arg"
			;;
		esac
	done
	CF_VERBOSE(resulting CC: '$CC')
	CF_VERBOSE(resulting CFLAGS: '$CFLAGS')
	CF_VERBOSE(resulting CPPFLAGS: '$CPPFLAGS')
	;;
(*)
	AC_MSG_RESULT(ok)
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_CACHE version: 12 updated: 2012/10/02 20:55:03
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,"$system_name",[Define to the system name.])
AC_CACHE_VAL(cf_cv_system_name,[cf_cv_system_name="$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_CHECK_CFLAGS version: 3 updated: 2014/07/22 05:32:57
dnl ---------------
dnl Conditionally add to $CFLAGS and $CPPFLAGS values which are derived from
dnl a build-configuration such as imake.  These have the pitfall that they
dnl often contain compiler-specific options which we cannot use, mixed with
dnl preprocessor options that we usually can.
AC_DEFUN([CF_CHECK_CFLAGS],
[
CF_VERBOSE(checking additions to CFLAGS)
cf_check_cflags="$CFLAGS"
cf_check_cppflags="$CPPFLAGS"
CF_ADD_CFLAGS($1,yes)
if test "x$cf_check_cflags" != "x$CFLAGS" ; then
AC_TRY_LINK([#include <stdio.h>],[printf("Hello world");],,
	[CF_VERBOSE(test-compile failed.  Undoing change to \$CFLAGS)
	 if test "x$cf_check_cppflags" != "x$CPPFLAGS" ; then
		 CF_VERBOSE(but keeping change to \$CPPFLAGS)
	 fi
	 CFLAGS="$cf_check_flags"])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_LIBTOOL_VERSION version: 1 updated: 2013/04/06 18:03:09
dnl ------------------------
dnl Show the version of libtool
dnl
dnl Save the version in a cache variable - this is not entirely a good thing,
dnl but the version string from libtool is very ugly, and for bug reports it
dnl might be useful to have the original string.
AC_DEFUN([CF_CHECK_LIBTOOL_VERSION],[
if test -n "$LIBTOOL" && test "$LIBTOOL" != none
then
	AC_MSG_CHECKING(version of $LIBTOOL)
	CF_LIBTOOL_VERSION
	AC_MSG_RESULT($cf_cv_libtool_version)
	if test -z "$cf_cv_libtool_version" ; then
		AC_MSG_ERROR(This is not GNU libtool)
	fi
else
	AC_MSG_ERROR(GNU libtool has not been found)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CLANG_COMPILER version: 2 updated: 2013/11/19 19:23:35
dnl -----------------
dnl Check if the given compiler is really clang.  clang's C driver defines
dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
dnl not ignore some gcc options.
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 = CLANG_COMPILER (default)
dnl $3 = CFLAGS (default) or CXXFLAGS
AC_DEFUN([CF_CLANG_COMPILER],[
ifelse([$2],,CLANG_COMPILER,[$2])=no

if test "$ifelse([$1],,[$1],GCC)" = yes ; then
	AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
	cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
	ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -Qunused-arguments"
	AC_TRY_COMPILE([],[
#ifdef __clang__
#else
make an error
#endif
],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
cf_save_CFLAGS="$cf_save_CFLAGS -Qunused-arguments"
],[])
	ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
	AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_CHTYPE version: 8 updated: 2012/10/06 08:57:51
dnl ----------------
dnl Test if curses defines 'chtype' (usually a 'long' type for SysV curses).
AC_DEFUN([CF_CURSES_CHTYPE],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_CACHE_CHECK(for chtype typedef,cf_cv_chtype_decl,[
	AC_TRY_COMPILE([#include <${cf_cv_ncurses_header:-curses.h}>],
		[chtype foo],
		[cf_cv_chtype_decl=yes],
		[cf_cv_chtype_decl=no])])
if test $cf_cv_chtype_decl = yes ; then
	AC_DEFINE(HAVE_TYPE_CHTYPE,1,[Define to 1 if chtype is declared])
	AC_CACHE_CHECK(if chtype is scalar or struct,cf_cv_chtype_type,[
		AC_TRY_COMPILE([#include <${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,1,[Define to 1 if chtype is a scaler/integer])
	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: 12 updated: 2015/04/15 19:08:48
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 $host_os in
(hpux10.*)
	if test "x$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: 18 updated: 2014/07/19 18:44:41
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});
fprintf(stderr, "testing linkage of $cf_func:%p\n", foo);
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: 5 updated: 2015/04/23 20:35:30
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 \
	ncurses.h ifelse($1,,,[$1/ncurses.h]) \
	curses.h ifelse($1,,,[$1/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: 39 updated: 2015/05/10 19:52:14
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 $host_os in
(freebsd*)
	AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
	;;
(hpux10.*)
	# Looking at HPUX 10.20, the Hcurses library is the oldest (1997), cur_colr
	# next (1998), and xcurses "newer" (2000).  There is no header file for
	# Hcurses; the subdirectory curses_colr has the headers (curses.h and
	# term.h) for cur_colr
	if test "x$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"

	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.
	if test "x$cf_term_lib" = x
	then
		AC_CHECK_FUNC(tgoto,[cf_term_lib=predefined],[
			for cf_term_lib in $cf_check_list otermcap termcap tinfo termlib unknown
			do
				AC_CHECK_LIB($cf_term_lib,tgoto,[break])
			done
		])
	fi

	# Check for library containing initscr
	test "$cf_term_lib" != predefined && test "$cf_term_lib" != unknown && LIBS="-l$cf_term_lib $cf_save_LIBS"
	if test "x$cf_curs_lib" = x
	then
		for cf_curs_lib in $cf_check_list xcurses jcurses pdcurses unknown
		do
			AC_CHECK_LIB($cf_curs_lib,initscr,[break])
		done
	fi
	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_SETBEGYX version: 3 updated: 2013/06/15 11:12:27
dnl ------------------
dnl See if we can define a function to set a window's beginning y/x coordinates.
AC_DEFUN([CF_CURSES_SETBEGYX],[
AC_MSG_CHECKING(how to define setbegyx)
cf_result=ERR
for cf_check in \
	'((win)->_begy = (y), (win)->_begx = (x), OK)'
do
	AC_TRY_COMPILE([
#include <${cf_cv_ncurses_header:-curses.h}>
],[
WINDOW *win = 0;
#define setbegyx(win,y,x) $cf_check
setbegyx(win, 2, 3);
],[cf_result=$cf_check; break])
done
AC_MSG_RESULT("$cf_result")
AC_DEFINE_UNQUOTED(setbegyx(win,y,x),$cf_result,[Define to function for setting window's y/x coordinates])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_TERM_H version: 11 updated: 2015/04/15 19:08:48
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
(*/*)
	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 $cf_cv_term_header in
(no)
	# If curses is ncurses, some packagers still mess it up by trying to make
	# us use GNU termcap.  This handles the most common case.
	for cf_header in ncurses/term.h ncursesw/term.h
	do
		AC_TRY_COMPILE([
#include <${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
(term.h)
	AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
	;;
(ncurses/term.h)
	AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
	;;
(ncursesw/term.h)
	AC_DEFINE(HAVE_NCURSESW_TERM_H,1,[Define to 1 if we have ncursesw/term.h])
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_UNCTRL_H version: 4 updated: 2015/04/15 19:08:48
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
(*/*)
	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
(no)
	AC_MSG_WARN(unctrl.h header not found)
	;;
esac

case $cf_cv_unctrl_header in
(unctrl.h)
	AC_DEFINE(HAVE_UNCTRL_H,1,[Define to 1 if we have unctrl.h])
	;;
(ncurses/unctrl.h)
	AC_DEFINE(HAVE_NCURSES_UNCTRL_H,1,[Define to 1 if we have ncurses/unctrl.h])
	;;
(ncursesw/unctrl.h)
	AC_DEFINE(HAVE_NCURSESW_UNCTRL_H,1,[Define to 1 if we have ncursesw/unctrl.h])
	;;
esac
])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: 13 updated: 2015/04/18 08:56:57
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          do not 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_LEAKS version: 7 updated: 2012/10/02 20:55:03
dnl ----------------
dnl Combine no-leak checks with the libraries or tools that are used for the
dnl checks.
AC_DEFUN([CF_DISABLE_LEAKS],[

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

AC_MSG_CHECKING(if you want to perform memory-leak testing)
AC_ARG_ENABLE(leaks,
	[  --disable-leaks         test: free permanent memory, analyze leaks],
	[if test "x$enableval" = xno; then with_no_leaks=yes; else with_no_leaks=no; fi],
	: ${with_no_leaks:=no})
AC_MSG_RESULT($with_no_leaks)

if test "$with_no_leaks" = yes ; then
	AC_DEFINE(NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
	AC_DEFINE(YY_NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_LIBTOOL_VERSION version: 3 updated: 2015/04/17 21:13:04
dnl --------------------------
dnl Check if we should use the libtool 1.5 feature "-version-number" instead of
dnl the older "-version-info" feature.  The newer feature allows us to use
dnl version numbering on shared libraries which make them compatible with
dnl various systems.
AC_DEFUN([CF_DISABLE_LIBTOOL_VERSION],
[
AC_MSG_CHECKING(if libtool -version-number should be used)
CF_ARG_DISABLE(libtool-version,
	[  --disable-libtool-version  enable to use libtool's incompatible naming scheme],
	[cf_libtool_version=no],
	[cf_libtool_version=yes])
AC_MSG_RESULT($cf_libtool_version)

if test "$cf_libtool_version" = yes ; then
	LIBTOOL_VERSION="-version-number"
else
	LIBTOOL_VERSION="-version-info"
	case "x$VERSION" in
	(x)
		AC_MSG_WARN(VERSION was not set)
		;;
	(x*.*.*)
		ABI_VERSION="$VERSION"
		CF_VERBOSE(ABI_VERSION: $ABI_VERSION)
		;;
	(x*:*:*)
		ABI_VERSION=`echo "$VERSION" | sed -e 's/:/./g'`
		CF_VERBOSE(ABI_VERSION: $ABI_VERSION)
		;;
	(*)
		AC_MSG_WARN(unexpected VERSION value: $VERSION)
		;;
	esac
fi

AC_SUBST(ABI_VERSION)
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_ENABLE_RPATH version: 2 updated: 2010/03/27 18:39:42
dnl ---------------
dnl Check if the rpath option should be used, setting cache variable
dnl cf_cv_enable_rpath if so.
AC_DEFUN([CF_ENABLE_RPATH],
[
AC_MSG_CHECKING(if rpath option should be used)
AC_ARG_ENABLE(rpath,
[  --enable-rpath          use rpath option when generating shared libraries],
[cf_cv_enable_rpath=$enableval],
[cf_cv_enable_rpath=no])
AC_MSG_RESULT($cf_cv_enable_rpath)
])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: 20 updated: 2015/04/18 08:56:57
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_FORGET_TOOL version: 1 updated: 2013/04/06 18:03:09
dnl --------------
dnl Forget that we saw the given tool.
AC_DEFUN([CF_FORGET_TOOL],[
unset ac_cv_prog_ac_ct_$1
unset ac_ct_$1
unset $1
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FUNC_LSTAT version: 3 updated: 2012/11/08 20:57:52
dnl -------------
dnl A conventional existence-check for 'lstat' won't work with the Linux
dnl version of gcc 2.7.0, since the symbol is defined only within <sys/stat.h>
dnl as an inline function.
dnl
dnl So much for portability.
AC_DEFUN([CF_FUNC_LSTAT],
[
AC_MSG_CHECKING(for lstat)
AC_CACHE_VAL(ac_cv_func_lstat,[
AC_TRY_LINK([
#include <sys/types.h>
#include <sys/stat.h>],
	[lstat(".", (struct stat *)0)],
	[ac_cv_func_lstat=yes],
	[ac_cv_func_lstat=no])
	])
AC_MSG_RESULT($ac_cv_func_lstat )
if test $ac_cv_func_lstat = yes; then
	AC_DEFINE(HAVE_LSTAT,1,[Define to 1 if we have lstat])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_ATTRIBUTES version: 17 updated: 2015/04/12 15:39:00
dnl -----------------
dnl Test for availability of useful gcc __attribute__ directives to quiet
dnl compiler warnings.  Though useful, not all are supported -- and contrary
dnl to documentation, unrecognized directives cause older compilers to barf.
AC_DEFUN([CF_GCC_ATTRIBUTES],
[
if test "$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 $cf_attribute in
		(printf)
			cf_printf_attribute=yes
			cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
			;;
		(scanf)
			cf_scanf_attribute=yes
			cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
			;;
		(*)
			cat >conftest.h <<EOF
#define GCC_$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 $cf_attribute in
			(noreturn)
				AC_DEFINE_UNQUOTED(GCC_NORETURN,$cf_directive,[Define to noreturn-attribute for gcc])
				;;
			(printf)
				cf_value='/* nothing */'
				if test "$cf_printf_attribute" != no ; then
					cf_value='__attribute__((format(printf,fmt,var)))'
					AC_DEFINE(GCC_PRINTF,1,[Define to 1 if the compiler supports gcc-like printf attribute.])
				fi
				AC_DEFINE_UNQUOTED(GCC_PRINTFLIKE(fmt,var),$cf_value,[Define to printf-attribute for gcc])
				;;
			(scanf)
				cf_value='/* nothing */'
				if test "$cf_scanf_attribute" != no ; then
					cf_value='__attribute__((format(scanf,fmt,var)))'
					AC_DEFINE(GCC_SCANF,1,[Define to 1 if the compiler supports gcc-like scanf attribute.])
				fi
				AC_DEFINE_UNQUOTED(GCC_SCANFLIKE(fmt,var),$cf_value,[Define to sscanf-attribute for gcc])
				;;
			(unused)
				AC_DEFINE_UNQUOTED(GCC_UNUSED,$cf_directive,[Define to unused-attribute for gcc])
				;;
			esac
		fi
	done
else
	fgrep define conftest.i >>confdefs.h
fi
rm -rf conftest*
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_VERSION version: 7 updated: 2012/10/18 06:46:33
dnl --------------
dnl Find version of gcc
AC_DEFUN([CF_GCC_VERSION],[
AC_REQUIRE([AC_PROG_CC])
GCC_VERSION=none
if test "$GCC" = yes ; then
	AC_MSG_CHECKING(version of $CC)
	GCC_VERSION="`${CC} --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(GCC[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
	test -z "$GCC_VERSION" && GCC_VERSION=unknown
	AC_MSG_RESULT($GCC_VERSION)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_WARNINGS version: 32 updated: 2015/04/12 15:39:00
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)
CF_CLANG_COMPILER(GCC,CLANG_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 "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
	cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
	test "x$CLANG_COMPILER" = xyes && cf_gcc_warnings=
	for cf_opt in W Wall \
		Wbad-function-cast \
		Wcast-align \
		Wcast-qual \
		Wdeclaration-after-statement \
		Wextra \
		Winline \
		Wmissing-declarations \
		Wmissing-prototypes \
		Wnested-externs \
		Wpointer-arith \
		Wshadow \
		Wstrict-prototypes \
		Wundef $cf_gcc_warnings $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 $cf_opt in
			(Wcast-qual)
				CPPFLAGS="$CPPFLAGS -DXTSTRINGDEFINES"
				;;
			(Winline)
				case $GCC_VERSION in
				([[34]].*)
					CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
					continue;;
				esac
				;;
			(Wpointer-arith)
				case $GCC_VERSION in
				([[12]].*)
					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_GETOPT_HEADER version: 6 updated: 2014/07/22 14:45:54
dnl ----------------
dnl Check for getopt's variables which are commonly defined in stdlib.h,
dnl unistd.h or (nonstandard) in getopt.h
AC_DEFUN([CF_GETOPT_HEADER],
[
AC_HAVE_HEADERS(unistd.h getopt.h)
AC_CACHE_CHECK(for header declaring getopt variables,cf_cv_getopt_header,[
cf_cv_getopt_header=none
for cf_header in stdio.h stdlib.h unistd.h getopt.h
do
AC_TRY_COMPILE([
#include <$cf_header>],
[int x = optind; char *y = optarg],
[cf_cv_getopt_header=$cf_header
 break])
done
])
if test $cf_cv_getopt_header != none ; then
	AC_DEFINE(HAVE_GETOPT_HEADER,1,[Define to 1 if getopt variables are declared in header])
fi
if test $cf_cv_getopt_header = getopt.h ; then
	AC_DEFINE(NEED_GETOPT_H,1,[Define to 1 if we must include getopt.h])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNU_SOURCE version: 7 updated: 2016/08/05 05:15:37
dnl -------------
dnl Check if we must define _GNU_SOURCE to get a reasonable value for
dnl _XOPEN_SOURCE, upon which many POSIX definitions depend.  This is a defect
dnl (or misfeature) of glibc2, which breaks portability of many applications,
dnl since it is interwoven with GNU extensions.
dnl
dnl Well, yes we could work around it...
AC_DEFUN([CF_GNU_SOURCE],
[
AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_gnu_source=no],
	[cf_save="$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"
	])
])

if test "$cf_cv_gnu_source" = yes
then
AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
	AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _DEFAULT_SOURCE
make an error
#endif],
		[cf_cv_default_source=no],
		[cf_cv_default_source=yes])
	])
test "$cf_cv_default_source" = yes && CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE"
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_HEADER_PATH version: 13 updated: 2015/04/15 19:08:48
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 $cf_header_path in
		(-I*)
			cf_header_path=`echo ".$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_INTEL_COMPILER version: 7 updated: 2015/04/12 15:39:00
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],[
AC_REQUIRE([AC_CANONICAL_HOST])
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"
],[])
		ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
		AC_MSG_RESULT($ifelse([$2],,INTEL_COMPILER,[$2]))
		;;
	esac
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LD_RPATH_OPT version: 7 updated: 2016/02/20 18:01:19
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 $cf_cv_system_name in
(irix*)
	if test "$GCC" = yes; then
		LD_RPATH_OPT="-Wl,-rpath,"
	else
		LD_RPATH_OPT="-rpath "
	fi
	;;
(linux*|gnu*|k*bsd*-gnu|freebsd*)
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
(openbsd[[2-9]].*|mirbsd*)
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
(dragonfly*)
	LD_RPATH_OPT="-rpath "
	;;
(netbsd*)
	LD_RPATH_OPT="-Wl,-rpath,"
	;;
(osf*|mls+*)
	LD_RPATH_OPT="-rpath "
	;;
(solaris2*)
	LD_RPATH_OPT="-R"
	;;
(*)
	;;
esac
AC_MSG_RESULT($LD_RPATH_OPT)

case "x$LD_RPATH_OPT" in
(x-R*)
	AC_MSG_CHECKING(if we need a space after rpath option)
	cf_save_LIBS="$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: 10 updated: 2015/04/15 19:08:48
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 $cf_library_path in
		(-L*)
			cf_library_path=`echo ".$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 [$]$1"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIBTOOL_VERSION version: 1 updated: 2013/04/06 18:03:09
dnl ------------------
AC_DEFUN([CF_LIBTOOL_VERSION],[
if test -n "$LIBTOOL" && test "$LIBTOOL" != none
then
	cf_cv_libtool_version=`$LIBTOOL --version 2>&1 | sed -e '/^$/d' |sed -e '2,$d' -e 's/([[^)]]*)//g' -e 's/^[[^1-9]]*//' -e 's/[[^0-9.]].*//'`
else
	cf_cv_libtool_version=
fi
test -z "$cf_cv_libtool_version" && unset cf_cv_libtool_version
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIB_PREFIX version: 12 updated: 2015/10/17 19:03:33
dnl -------------
dnl Compute the library-prefix for the given host system
dnl $1 = variable to set
define([CF_LIB_PREFIX],
[
	case $cf_cv_system_name in
	(OS/2*|os2*)
		if test "$DFT_LWR_MODEL" = libtool; then
			LIB_PREFIX='lib'
		else
			LIB_PREFIX=''
		fi
		;;
	(*)	LIB_PREFIX='lib'
		;;
	esac
ifelse($1,,,[$1=$LIB_PREFIX])
	AC_SUBST(LIB_PREFIX)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIB_SUFFIX version: 25 updated: 2015/04/17 21:13:04
dnl -------------
dnl Compute the library file-suffix from the given model name
dnl $1 = model name
dnl $2 = variable to set (the nominal library suffix)
dnl $3 = dependency variable to set (actual filename)
dnl The variable $LIB_SUFFIX, if set, prepends the variable to set.
AC_DEFUN([CF_LIB_SUFFIX],
[
	case X$1 in
	(Xlibtool)
		$2='.la'
		$3=[$]$2
		;;
	(Xdebug)
		$2='_g.a'
		$3=[$]$2
		;;
	(Xprofile)
		$2='_p.a'
		$3=[$]$2
		;;
	(Xshared)
		case $cf_cv_system_name in
		(aix[[5-7]]*)
			$2='.so'
			$3=[$]$2
			;;
		(cygwin*|msys*|mingw*)
			$2='.dll'
			$3='.dll.a'
			;;
		(darwin*)
			$2='.dylib'
			$3=[$]$2
			;;
		(hpux*)
			case $target in
			(ia64*)
				$2='.so'
				$3=[$]$2
				;;
			(*)
				$2='.sl'
				$3=[$]$2
				;;
			esac
			;;
		(*)
			$2='.so'
			$3=[$]$2
			;;
		esac
		;;
	(*)
		$2='.a'
		$3=[$]$2
		;;
	esac
	if test -n "${LIB_SUFFIX}${EXTRA_SUFFIX}"
	then
		$2="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$2}"
		$3="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$3}"
	fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LOCALE version: 5 updated: 2012/10/06 11:17:15
dnl ---------
dnl Check if we have setlocale() and its header, <locale.h>
dnl The optional parameter $1 tells what to do if we do have locale support.
AC_DEFUN([CF_LOCALE],
[
AC_MSG_CHECKING(for setlocale())
AC_CACHE_VAL(cf_cv_locale,[
AC_TRY_LINK([#include <locale.h>],
	[setlocale(LC_ALL, "")],
	[cf_cv_locale=yes],
	[cf_cv_locale=no])
	])
AC_MSG_RESULT($cf_cv_locale)
test $cf_cv_locale = yes && { ifelse($1,,AC_DEFINE(LOCALE,1,[Define to 1 if we have locale support]),[$1]) }
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MAKEFLAGS version: 17 updated: 2015/08/05 20:44:28
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 = $SHELL
all :
	@ echo '.$cf_option'
CF_EOF
		cf_result=`${MAKE:-make} -k -f cf_makeflags.tmp 2>/dev/null | fgrep -v "ing directory" | sed -e 's,[[ 	]]*$,,'`
		case "$cf_result" in
		(.*k|.*kw)
			cf_result=`${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_MIXEDCASE_FILENAMES version: 7 updated: 2015/04/12 15:39:00
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 $target_alias in
	(*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*)
		cf_cv_mixedcase=no
		;;
	(*)
		cf_cv_mixedcase=yes
		;;
	esac
else
	rm -f conftest CONFTEST
	echo test >conftest
	if test -f CONFTEST ; then
		cf_cv_mixedcase=no
	else
		cf_cv_mixedcase=yes
	fi
	rm -f conftest CONFTEST
fi
])
test "$cf_cv_mixedcase" = yes && AC_DEFINE(MIXEDCASE_FILENAMES,1,[Define to 1 if filesystem supports mixed-case 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: 17 updated: 2015/07/07 04:22:07
dnl -----------------
dnl Tie together the configure-script macros for ncurses, preferring these in
dnl order:
dnl a) ".pc" files for pkg-config, using $NCURSES_CONFIG_PKG
dnl b) the "-config" script from ncurses, using $NCURSES_CONFIG
dnl c) just plain libraries
dnl
dnl $1 is the root library name (default: "ncurses")
AC_DEFUN([CF_NCURSES_CONFIG],[
AC_REQUIRE([CF_PKG_CONFIG])
cf_ncuconfig_root=ifelse($1,,ncurses,$1)
cf_have_ncuconfig=no

if test "x${PKG_CONFIG:=none}" != xnone; then
	AC_MSG_CHECKING(pkg-config for $cf_ncuconfig_root)
	if "$PKG_CONFIG" --exists $cf_ncuconfig_root ; then
		AC_MSG_RESULT(yes)

		AC_MSG_CHECKING(if the $cf_ncuconfig_root package files work)
		cf_have_ncuconfig=unknown

		cf_save_CPPFLAGS="$CPPFLAGS"
		cf_save_LIBS="$LIBS"

		CPPFLAGS="$CPPFLAGS `$PKG_CONFIG --cflags $cf_ncuconfig_root`"
		CF_ADD_LIBS(`$PKG_CONFIG --libs $cf_ncuconfig_root`)

		AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
			[initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
			[AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
				int main(void)
				{ char *xx = curses_version(); return (xx == 0); }],
				[cf_have_ncuconfig=yes],
				[cf_have_ncuconfig=no],
				[cf_have_ncuconfig=maybe])],
			[cf_have_ncuconfig=no])
		AC_MSG_RESULT($cf_have_ncuconfig)
		test "$cf_have_ncuconfig" = maybe && cf_have_ncuconfig=yes
		if test "$cf_have_ncuconfig" != "yes"
		then
			CPPFLAGS="$cf_save_CPPFLAGS"
			LIBS="$cf_save_LIBS"
			NCURSES_CONFIG_PKG=none
		else
			AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
			NCURSES_CONFIG_PKG=$cf_ncuconfig_root
		fi

	else
		AC_MSG_RESULT(no)
		NCURSES_CONFIG_PKG=none
	fi
else
	NCURSES_CONFIG_PKG=none
fi

if test "x$cf_have_ncuconfig" = "xno"; then
	echo "Looking for ${cf_ncuconfig_root}-config"

	CF_ACVERSION_CHECK(2.52,
		[AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncuconfig_root}-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
		[AC_PATH_PROGS(NCURSES_CONFIG,  ${cf_ncuconfig_root}-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,1,[Define to 1 if we are using ncurses headers/libraries])

		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
else
	NCURSES_CONFIG=none
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CPPFLAGS version: 21 updated: 2012/10/06 08:57:51
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,1,[Define to 1 if we are using ncurses headers/libraries])

CF_NCURSES_VERSION
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_HEADER version: 4 updated: 2015/04/15 19:08:48
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
(*ncurses.h)
	AC_DEFINE(HAVE_NCURSES_H,1,[Define to 1 if we have ncurses.h])
	;;
esac

case $cf_cv_ncurses_header in
(ncurses/curses.h|ncurses/ncurses.h)
	AC_DEFINE(HAVE_NCURSES_NCURSES_H,1,[Define to 1 if we have ncurses/ncurses.h])
	;;
(ncursesw/curses.h|ncursesw/ncurses.h)
	AC_DEFINE(HAVE_NCURSESW_NCURSES_H,1,[Define to 1 if we have ncursesw/ncurses.h])
	;;
esac

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_LIBS version: 17 updated: 2015/04/15 19:08:48
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 $host_os in
(freebsd*)
	# This is only necessary if you are linking against an obsolete
	# version of ncurses (but it should do no harm, since it's static).
	if test "$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_PTHREADS version: 2 updated: 2016/04/22 05:07:41
dnl -------------------
dnl Use this followup check to ensure that we link with pthreads if ncurses
dnl uses it.
AC_DEFUN([CF_NCURSES_PTHREADS],[
: ${cf_nculib_root:=ifelse($1,,ncurses,$1)}
AC_CHECK_LIB($cf_nculib_root,_nc_init_pthreads,
	cf_cv_ncurses_pthreads=yes,
	cf_cv_ncurses_pthreads=no)
if test "$cf_cv_ncurses_pthreads" = yes
then
	CF_ADD_LIBS(-lpthread)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_VERSION version: 14 updated: 2012/10/06 08:57:51
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,1,[Define to 1 if we are using ncurses headers/libraries])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NO_LEAKS_OPTION version: 6 updated: 2015/04/12 15:39:00
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_UNQUOTED($3,1,"Define to 1 if you want to use $1 for testing.")ifelse([$4],,[
	 $4
])
	: ${with_cflags:=-g}
	: ${with_no_leaks:=yes}
	 with_$1=yes],
	[with_$1=])
AC_MSG_RESULT(${with_$1:-no})

case .$with_cflags in
(.*-g*)
	case .$CFLAGS in
	(.*-g*)
		;;
	(*)
		CF_ADD_CFLAGS([-g])
		;;
	esac
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NUMBER_SYNTAX version: 2 updated: 2015/04/17 21:13:04
dnl ----------------
dnl Check if the given variable is a number.  If not, report an error.
dnl $1 is the variable
dnl $2 is the message
AC_DEFUN([CF_NUMBER_SYNTAX],[
if test -n "$1" ; then
  case $1 in
  ([[0-9]]*)
 	;;
  (*)
	AC_MSG_ERROR($2 is not a number: $1)
 	;;
  esac
else
  AC_MSG_ERROR($2 value is empty)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PATH_SYNTAX version: 16 updated: 2015/04/18 08:56:57
dnl --------------
dnl Check the argument to see that it looks like a pathname.  Rewrite it if it
dnl begins with one of the prefix/exec_prefix variables, and then again if the
dnl result begins with 'NONE'.  This is necessary to work around autoconf's
dnl delayed evaluation of those symbols.
AC_DEFUN([CF_PATH_SYNTAX],[
if test "x$prefix" != xNONE; then
	cf_path_syntax="$prefix"
else
	cf_path_syntax="$ac_default_prefix"
fi

case ".[$]$1" in
(.\[$]\(*\)*|.\'*\'*)
	;;
(..|./*|.\\*)
	;;
(.[[a-zA-Z]]:[[\\/]]*) # OS/2 EMX
	;;
(.\[$]{*prefix}*|.\[$]{*dir}*)
	eval $1="[$]$1"
	case ".[$]$1" in
	(.NONE/*)
		$1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
		;;
	esac
	;;
(.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_PDCURSES_X11 version: 13 updated: 2012/10/06 16:39:58
dnl ---------------
dnl Configure for PDCurses' X11 library
AC_DEFUN([CF_PDCURSES_X11],[
AC_REQUIRE([CF_X_ATHENA])

CF_ACVERSION_CHECK(2.52,
	[AC_CHECK_TOOLS(XCURSES_CONFIG, xcurses-config, none)],
	[AC_PATH_PROGS(XCURSES_CONFIG, xcurses-config, none)])

if test "$XCURSES_CONFIG" != none ; then

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

cf_cv_lib_XCurses=yes

else

LDFLAGS="$LDFLAGS $X_LIBS"
CF_CHECK_CFLAGS($X_CFLAGS)
AC_CHECK_LIB(X11,XOpenDisplay,
	[CF_ADD_LIBS(-lX11)],,
	[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])
AC_CACHE_CHECK(for XCurses library,cf_cv_lib_XCurses,[
CF_ADD_LIBS(-lXCurses)
AC_TRY_LINK([
#include <xcurses.h>
char *XCursesProgramName = "test";
],[XCursesExit();],
[cf_cv_lib_XCurses=yes],
[cf_cv_lib_XCurses=no])
])

fi

if test $cf_cv_lib_XCurses = yes ; then
	AC_DEFINE(UNIX,1,[Define to 1 if using PDCurses on Unix])
	AC_DEFINE(XCURSES,1,[Define to 1 if using PDCurses on Unix])
	AC_CHECK_HEADER(xcurses.h, AC_DEFINE(HAVE_XCURSES,1,[Define to 1 if using PDCurses on Unix]))
else
	AC_MSG_ERROR(Cannot link with XCurses)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PKG_CONFIG version: 10 updated: 2015/04/26 18:06:58
dnl -------------
dnl Check for the package-config program, unless disabled by command-line.
AC_DEFUN([CF_PKG_CONFIG],
[
AC_MSG_CHECKING(if you want to use pkg-config)
AC_ARG_WITH(pkg-config,
	[  --with-pkg-config{=path} enable/disable use of pkg-config],
	[cf_pkg_config=$withval],
	[cf_pkg_config=yes])
AC_MSG_RESULT($cf_pkg_config)

case $cf_pkg_config in
(no)
	PKG_CONFIG=none
	;;
(yes)
	CF_ACVERSION_CHECK(2.52,
		[AC_PATH_TOOL(PKG_CONFIG, pkg-config, none)],
		[AC_PATH_PROG(PKG_CONFIG, pkg-config, none)])
	;;
(*)
	PKG_CONFIG=$withval
	;;
esac

test -z "$PKG_CONFIG" && PKG_CONFIG=none
if test "$PKG_CONFIG" != none ; then
	CF_PATH_SYNTAX(PKG_CONFIG)
elif test "x$cf_pkg_config" != xno ; then
	AC_MSG_WARN(pkg-config is not installed)
fi

AC_SUBST(PKG_CONFIG)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_POSIX_C_SOURCE version: 9 updated: 2015/04/12 15:39:00
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 .$cf_POSIX_C_SOURCE in
	 (.[[12]]??*)
		cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
		;;
	 (.2)
		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 version: 4 updated: 2014/07/12 18:57:58
dnl ----------
dnl standard check for CC, plus followup sanity checks
dnl $1 = optional parameter to pass to AC_PROG_CC to specify compiler name
AC_DEFUN([CF_PROG_CC],[
ifelse($1,,[AC_PROG_CC],[AC_PROG_CC($1)])
CF_GCC_VERSION
CF_ACVERSION_CHECK(2.52,
	[AC_PROG_CC_STDC],
	[CF_ANSI_CC_REQD])
CF_CC_ENV_FLAGS
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_EXT version: 13 updated: 2015/04/18 09:03:58
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",[Define to the program extension (normally blank)])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_LINT version: 3 updated: 2016/05/22 15:25:54
dnl ------------
AC_DEFUN([CF_PROG_LINT],
[
AC_CHECK_PROGS(LINT, lint cppcheck splint)
AC_SUBST(LINT_OPTS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_LN_S version: 2 updated: 2010/08/14 18:25:37
dnl ------------
dnl Combine checks for "ln -s" and "ln -sf", updating $LN_S to include "-f"
dnl option if it is supported.
AC_DEFUN([CF_PROG_LN_S],[
AC_PROG_LN_S
AC_MSG_CHECKING(if $LN_S -f options work)

rm -f conf$$.src conf$$dst
echo >conf$$.dst
echo first >conf$$.src
if $LN_S -f conf$$.src conf$$.dst 2>/dev/null; then
	cf_prog_ln_sf=yes
else
	cf_prog_ln_sf=no
fi
rm -f conf$$.dst conf$$src
AC_MSG_RESULT($cf_prog_ln_sf)

test "$cf_prog_ln_sf" = yes && LN_S="$LN_S -f"
])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"'\(=[[^ 	]]*\)\?[$]//g'`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_RPATH_HACK version: 11 updated: 2013/09/01 13:02:00
dnl -------------
AC_DEFUN([CF_RPATH_HACK],
[
AC_REQUIRE([CF_LD_RPATH_OPT])
AC_MSG_CHECKING(for updated LDFLAGS)
if test -n "$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% =>.*$%%' |sort | uniq`
		 cf_rpath_list=`$cf_ldd_prog conftest$ac_exeext | fgrep / | sed -e 's%^.*[[ 	]]/%/%' -e 's%/[[^/]][[^/]]*$%%' |sort | uniq`])

		# 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)
else
	AC_MSG_RESULT(no)
fi
AC_SUBST(EXTRA_LDFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_RPATH_HACK_2 version: 7 updated: 2015/04/12 15:39:00
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
	(-L*)

		# 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_SHARED_OPTS version: 89 updated: 2015/08/15 18:38:59
dnl --------------
dnl --------------
dnl Attempt to determine the appropriate CC/LD options for creating a shared
dnl library.
dnl
dnl Notes:
dnl a) ${LOCAL_LDFLAGS} is used to link executables that will run within
dnl the build-tree, i.e., by making use of the libraries that are compiled in
dnl $rel_builddir/lib We avoid compiling-in a $rel_builddir/lib path for the
dnl shared library since that can lead to unexpected results at runtime.
dnl b) ${LOCAL_LDFLAGS2} has the same intention but assumes that the shared
dnl libraries are compiled in ../../lib
dnl
dnl The variable 'cf_cv_do_symlinks' is used to control whether we configure
dnl to install symbolic links to the rel/abi versions of shared libraries.
dnl
dnl The variable 'cf_cv_shlib_version' controls whether we use the rel or abi
dnl version when making symbolic links.
dnl
dnl The variable 'cf_cv_shlib_version_infix' controls whether shared library
dnl version numbers are infix (ex: libncurses.<ver>.dylib) or postfix
dnl (ex: libncurses.so.<ver>).
dnl
dnl Some loaders leave 'so_locations' lying around.  It's nice to clean up.
AC_DEFUN([CF_SHARED_OPTS],
[
	AC_REQUIRE([CF_LD_RPATH_OPT])
	RM_SHARED_OPTS=
	LOCAL_LDFLAGS=
	LOCAL_LDFLAGS2=
	LD_SHARED_OPTS=
	INSTALL_LIB="-m 644"
	: ${rel_builddir:=.}

	shlibdir=$libdir
	AC_SUBST(shlibdir)

	MAKE_DLLS="#"
	AC_SUBST(MAKE_DLLS)

	cf_cv_do_symlinks=no
	cf_ld_rpath_opt=
	test "$cf_cv_enable_rpath" = yes && cf_ld_rpath_opt="$LD_RPATH_OPT"

	AC_MSG_CHECKING(if release/abi version should be used for shared libs)
	AC_ARG_WITH(shlib-version,
	[  --with-shlib-version=X  Specify rel or abi version for shared libs],
	[test -z "$withval" && withval=auto
	case $withval in
	(yes)
		cf_cv_shlib_version=auto
		;;
	(rel|abi|auto)
		cf_cv_shlib_version=$withval
		;;
	(*)
		AC_MSG_RESULT($withval)
		AC_MSG_ERROR([option value must be one of: rel, abi, or auto])
		;;
	esac
	],[cf_cv_shlib_version=auto])
	AC_MSG_RESULT($cf_cv_shlib_version)

	cf_cv_rm_so_locs=no
	cf_try_cflags=

	# Some less-capable ports of gcc support only -fpic
	CC_SHARED_OPTS=
	if test "$GCC" = yes
	then
		AC_MSG_CHECKING(which $CC option to use)
		cf_save_CFLAGS="$CFLAGS"
		for CC_SHARED_OPTS in -fPIC -fpic ''
		do
			CFLAGS="$cf_save_CFLAGS $CC_SHARED_OPTS"
			AC_TRY_COMPILE([#include <stdio.h>],[int x = 1],[break],[])
		done
		AC_MSG_RESULT($CC_SHARED_OPTS)
		CFLAGS="$cf_save_CFLAGS"
	fi

	cf_cv_shlib_version_infix=no

	case $cf_cv_system_name in
	(aix4.[3-9]*|aix[[5-7]]*)
		if test "$GCC" = yes; then
			CC_SHARED_OPTS='-Wl,-brtl'
			MK_SHARED_LIB='${CC} -shared -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
		else
			CC_SHARED_OPTS='-brtl'
			# as well as '-qpic=large -G' or perhaps "-bM:SRE -bnoentry -bexpall"
			MK_SHARED_LIB='${CC} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
		fi
		;;
	(beos*)
		MK_SHARED_LIB='${CC} ${CFLAGS} -o $[@] -Xlinker -soname=`basename $[@]` -nostart -e 0'
		;;
	(cygwin*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cf_cv_shlib_version=cygdll
		cf_cv_shlib_version_infix=cygdll
		shlibdir=$bindir
		MAKE_DLLS=
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/cyg/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(msys*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cf_cv_shlib_version=msysdll
		cf_cv_shlib_version_infix=msysdll
		shlibdir=$bindir
		MAKE_DLLS=
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/msys-/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(darwin*)
		cf_try_cflags="no-cpp-precomp"
		CC_SHARED_OPTS="-dynamic"
		MK_SHARED_LIB='${CC} ${CFLAGS} -dynamiclib -install_name ${libdir}/`basename $[@]` -compatibility_version ${ABI_VERSION} -current_version ${ABI_VERSION} -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=abi
		cf_cv_shlib_version_infix=yes
		AC_CACHE_CHECK([if ld -search_paths_first works], cf_cv_ldflags_search_paths_first, [
			cf_save_LDFLAGS=$LDFLAGS
			LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
			AC_TRY_LINK(, [int i;], cf_cv_ldflags_search_paths_first=yes, cf_cv_ldflags_search_paths_first=no)
				LDFLAGS=$cf_save_LDFLAGS])
		if test $cf_cv_ldflags_search_paths_first = yes; then
			LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
		fi
		;;
	(hpux[[7-8]]*)
		# HP-UX 8.07 ld lacks "+b" option used for libdir search-list
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='+Z'
		fi
		MK_SHARED_LIB='${LD} -b -o $[@]'
		INSTALL_LIB="-m 555"
		;;
	(hpux*)
		# (tested with gcc 2.7.2 -- I don't have c89)
		if test "$GCC" = yes; then
			LD_SHARED_OPTS='-Xlinker +b -Xlinker ${libdir}'
		else
			CC_SHARED_OPTS='+Z'
			LD_SHARED_OPTS='-Wl,+b,${libdir}'
		fi
		MK_SHARED_LIB='${LD} +b ${libdir} -b -o $[@]'
		# HP-UX shared libraries must be executable, and should be
		# readonly to exploit a quirk in the memory manager.
		INSTALL_LIB="-m 555"
		;;
	(interix*)
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		if test "$cf_cv_shlib_version" = rel; then
			cf_shared_soname='`basename $@ .${REL_VERSION}`.${ABI_VERSION}'
		else
			cf_shared_soname='`basename $@`'
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${CC} -shared -Wl,-rpath,${RPATH_LIST} -Wl,-h,'$cf_shared_soname' -o $@'
		;;
	(irix*)
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		# tested with IRIX 5.2 and 'cc'.
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
			MK_SHARED_LIB='${CC} -shared -rdata_shared -soname `basename $[@]` -o $[@]'
		else
			MK_SHARED_LIB='${CC} -shared -Wl,-soname,`basename $[@]` -o $[@]'
		fi
		cf_cv_rm_so_locs=yes
		;;
	(linux*|gnu*|k*bsd*-gnu)
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(mingw*)
		cf_cv_shlib_version=mingw
		cf_cv_shlib_version_infix=mingw
		shlibdir=$bindir
		MAKE_DLLS=
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-Wl,--enable-auto-import"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="-Wl,--enable-auto-import $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* -shared -Wl,--enable-auto-import,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(openbsd[[2-9]].*|mirbsd*)
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-Bshareable,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(nto-qnx*|openbsd*|freebsd[[12]].*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		MK_SHARED_LIB='${LD} -Bshareable -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		;;
	(dragonfly*|freebsd*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="${cf_ld_rpath_opt}\${RPATH_LIST} $LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(netbsd*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
			if test "$cf_cv_shlib_version" = auto; then
			if test -f /usr/libexec/ld.elf_so; then
				cf_cv_shlib_version=abi
			else
				cf_cv_shlib_version=rel
			fi
			fi
			CF_SHARED_SONAME
			MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} -Wl,-shared -Wl,-Bshareable -o $[@]'
		fi
		;;
	(osf*|mls+*)
		# tested with OSF/1 V3.2 and 'cc'
		# tested with OSF/1 V3.2 and gcc 2.6.3 (but the c++ demo didn't
		# link with shared libs).
		MK_SHARED_LIB='${LD} -set_version ${REL_VERSION}:${ABI_VERSION} -expect_unresolved "*" -shared -soname `basename $[@]`'
		case $host_os in
		(osf4*)
			MK_SHARED_LIB="${MK_SHARED_LIB} -msym"
			;;
		esac
		MK_SHARED_LIB="${MK_SHARED_LIB}"' -o $[@]'
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		cf_cv_rm_so_locs=yes
		;;
	(sco3.2v5*)  # also uw2* and UW7: hops 13-Apr-98
		# tested with osr5.0.5
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-belf -KPIC'
		fi
		MK_SHARED_LIB='${LD} -dy -G -h `basename $[@] .${REL_VERSION}`.${ABI_VERSION} -o [$]@'
		if test "$cf_cv_enable_rpath" = yes ; then
			# only way is to set LD_RUN_PATH but no switch for it
			RUN_PATH=$libdir
		fi
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		LINK_PROGS='LD_RUN_PATH=${libdir}'
		LINK_TESTS='Pwd=`pwd`;LD_RUN_PATH=`dirname $${Pwd}`/lib'
		;;
	(sunos4*)
		# tested with SunOS 4.1.1 and gcc 2.7.0
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
		fi
		MK_SHARED_LIB='${LD} -assert pure-text -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		;;
	(solaris2*)
		# tested with SunOS 5.5.1 (solaris 2.5.1) and gcc 2.7.2
		# tested with SunOS 5.10 (solaris 10) and gcc 3.4.3
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-R \$(LOCAL_LIBDIR):\${libdir}"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="-R \${libdir} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		if test "$GCC" != yes; then
			cf_save_CFLAGS="$CFLAGS"
			for cf_shared_opts in -xcode=pic32 -xcode=pic13 -KPIC -Kpic -O
			do
				CFLAGS="$cf_shared_opts $cf_save_CFLAGS"
				AC_TRY_COMPILE([#include <stdio.h>],[printf("Hello\n");],[break])
			done
			CFLAGS="$cf_save_CFLAGS"
			CC_SHARED_OPTS=$cf_shared_opts
			MK_SHARED_LIB='${CC} -dy -G -h '$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} -shared -dy -G -h '$cf_cv_shared_soname' -o $[@]'
		fi
		;;
	(sysv5uw7*|unix_sv*)
		# tested with UnixWare 7.1.0 (gcc 2.95.2 and cc)
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
		fi
		MK_SHARED_LIB='${LD} -d y -G -o [$]@'
		;;
	(*)
		CC_SHARED_OPTS='unknown'
		MK_SHARED_LIB='echo unknown'
		;;
	esac

	# This works if the last tokens in $MK_SHARED_LIB are the -o target.
	case "$cf_cv_shlib_version" in
	(rel|abi)
		case "$MK_SHARED_LIB" in
		(*'-o $[@]')
			test "$cf_cv_do_symlinks" = no && cf_cv_do_symlinks=yes
			;;
		(*)
			AC_MSG_WARN(ignored --with-shlib-version)
			;;
		esac
		;;
	esac

	if test -n "$cf_try_cflags"
	then
cat > conftest.$ac_ext <<EOF
#line __oline__ "${as_me:-configure}"
#include <stdio.h>
int main(int argc, char *argv[[]])
{
	printf("hello\n");
	return (argv[[argc-1]] == 0) ;
}
EOF
		cf_save_CFLAGS="$CFLAGS"
		for cf_opt in $cf_try_cflags
		do
			CFLAGS="$cf_save_CFLAGS -$cf_opt"
			AC_MSG_CHECKING(if CFLAGS option -$cf_opt works)
			if AC_TRY_EVAL(ac_compile); then
				AC_MSG_RESULT(yes)
				cf_save_CFLAGS="$CFLAGS"
			else
				AC_MSG_RESULT(no)
			fi
		done
		CFLAGS="$cf_save_CFLAGS"
	fi


	# RPATH_LIST is a colon-separated list of directories
	test -n "$cf_ld_rpath_opt" && MK_SHARED_LIB="$MK_SHARED_LIB $cf_ld_rpath_opt\${RPATH_LIST}"
	test -z "$RPATH_LIST" && RPATH_LIST="\${libdir}"

	test $cf_cv_rm_so_locs = yes && RM_SHARED_OPTS="$RM_SHARED_OPTS so_locations"

	CF_VERBOSE(CC_SHARED_OPTS: $CC_SHARED_OPTS)
	CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)

	AC_SUBST(CC_SHARED_OPTS)
	AC_SUBST(LD_RPATH_OPT)
	AC_SUBST(LD_SHARED_OPTS)
	AC_SUBST(MK_SHARED_LIB)
	AC_SUBST(RM_SHARED_OPTS)

	AC_SUBST(LINK_PROGS)
	AC_SUBST(LINK_TESTS)

	AC_SUBST(EXTRA_LDFLAGS)
	AC_SUBST(LOCAL_LDFLAGS)
	AC_SUBST(LOCAL_LDFLAGS2)

	AC_SUBST(INSTALL_LIB)
	AC_SUBST(RPATH_LIST)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SHARED_SONAME version: 3 updated: 2008/09/08 18:34:43
dnl ----------------
dnl utility macro for CF_SHARED_OPTS, constructs "$cf_cv_shared_soname" for
dnl substitution into MK_SHARED_LIB string for the "-soname" (or similar)
dnl option.
dnl
dnl $1 is the default that should be used for "$cf_cv_shlib_version".
dnl If missing, use "rel".
define([CF_SHARED_SONAME],
[
	test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=ifelse($1,,rel,$1)
	if test "$cf_cv_shlib_version" = rel; then
		cf_cv_shared_soname='`basename $[@] .${REL_VERSION}`.${ABI_VERSION}'
	else
		cf_cv_shared_soname='`basename $[@]`'
	fi
])
dnl ---------------------------------------------------------------------------
dnl CF_SUBDIR_PATH version: 7 updated: 2014/12/04 04:33:06
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,$3,$prefix,NONE)

for cf_subdir_prefix in \
	/usr \
	/usr/local \
	/usr/pkg \
	/opt \
	/opt/local \
	[$]HOME
do
	CF_ADD_SUBDIR_PATH($1,$2,$3,$cf_subdir_prefix,$prefix)
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_TERM_HEADER version: 4 updated: 2015/04/15 19:08:48
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 ${cf_cv_ncurses_header} in
(*/ncurses.h|*/ncursesw.h)
	cf_term_header=`echo "$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
(*term.h)
	AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
	;;
esac

case $cf_cv_term_header in
(ncurses/term.h)
	AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
	;;
(ncursesw/term.h)
	AC_DEFINE(HAVE_NCURSESW_TERM_H,1,[Define to 1 if we have ncursesw/term.h])
	;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_TOP_BUILDDIR version: 2 updated: 2013/07/27 17:38:32
dnl ---------------
dnl Define a top_builddir symbol, for applications that need an absolute path.
AC_DEFUN([CF_TOP_BUILDDIR],
[
top_builddir=ifelse($1,,`pwd`,$1)
AC_SUBST(top_builddir)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_TRIM_X_LIBS version: 3 updated: 2015/04/12 15:39:00
dnl --------------
dnl Trim extra base X libraries added as a workaround for inconsistent library
dnl dependencies returned by "new" pkg-config files.
AC_DEFUN([CF_TRIM_X_LIBS],[
	for cf_trim_lib in Xmu Xt X11
	do
		case "$LIBS" in
		(*-l$cf_trim_lib\ *-l$cf_trim_lib*)
			LIBS=`echo "$LIBS " | sed -e 's/  / /g' -e 's%-l'"$cf_trim_lib"' %%' -e 's/ $//'`
			CF_VERBOSE(..trimmed $LIBS)
			;;
		esac
	done
])
dnl ---------------------------------------------------------------------------
dnl CF_TRY_PKG_CONFIG version: 5 updated: 2013/07/06 21:27:06
dnl -----------------
dnl This is a simple wrapper to use for pkg-config, for libraries which may be
dnl available in that form.
dnl
dnl $1 = package name
dnl $2 = extra logic to use, if any, after updating CFLAGS and LIBS
dnl $3 = logic to use if pkg-config does not have the package
AC_DEFUN([CF_TRY_PKG_CONFIG],[
AC_REQUIRE([CF_PKG_CONFIG])

if test "$PKG_CONFIG" != none && "$PKG_CONFIG" --exists $1; then
	CF_VERBOSE(found package $1)
	cf_pkgconfig_incs="`$PKG_CONFIG --cflags $1 2>/dev/null`"
	cf_pkgconfig_libs="`$PKG_CONFIG --libs   $1 2>/dev/null`"
	CF_VERBOSE(package $1 CFLAGS: $cf_pkgconfig_incs)
	CF_VERBOSE(package $1 LIBS: $cf_pkgconfig_libs)
	CF_ADD_CFLAGS($cf_pkgconfig_incs)
	CF_ADD_LIBS($cf_pkgconfig_libs)
	ifelse([$2],,:,[$2])
else
	cf_pkgconfig_incs=
	cf_pkgconfig_libs=
	ifelse([$3],,:,[$3])
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_TRY_XOPEN_SOURCE version: 1 updated: 2011/10/30 17:09:50
dnl -------------------
dnl If _XOPEN_SOURCE is not defined in the compile environment, check if we
dnl can define it successfully.
AC_DEFUN([CF_TRY_XOPEN_SOURCE],[
AC_CACHE_CHECK(if we should define _XOPEN_SOURCE,cf_cv_xopen_source,[
	AC_TRY_COMPILE([
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
],[
#ifndef _XOPEN_SOURCE
make an error
#endif],
	[cf_cv_xopen_source=no],
	[cf_save="$CPPFLAGS"
	 CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	 AC_TRY_COMPILE([
#include <stdlib.h>
#include <string.h>
#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
])
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 "$2" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_UTF8_LIB version: 8 updated: 2012/10/06 08:57:51
dnl -----------
dnl Check for multibyte support, and if not found, utf8 compatibility library
AC_DEFUN([CF_UTF8_LIB],
[
AC_CACHE_CHECK(for multibyte character support,cf_cv_utf8_lib,[
	cf_save_LIBS="$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 "$cf_cv_utf8_lib" = "add-on" ; then
	AC_DEFINE(HAVE_LIBUTF8_H,1,[Define to 1 if we should include libutf8.h])
	CF_ADD_INCDIR($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: 7 updated: 2015/04/17 21:13:04
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(ABI 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",[Define to the package-name])
	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_WITH_ABI_VERSION version: 3 updated: 2015/06/06 16:10:11
dnl -------------------
dnl Allow library's ABI to be overridden.  Generally this happens when a
dnl packager has incremented the ABI past that used in the original package,
dnl and wishes to keep doing this.
dnl
dnl $1 is the package name, if any, to derive a corresponding {package}_ABI
dnl symbol.
AC_DEFUN([CF_WITH_ABI_VERSION],[
test -z "$cf_cv_abi_version" && cf_cv_abi_version=0
AC_ARG_WITH(abi-version,
[  --with-abi-version=XXX  override derived ABI version],[
	if test "x$cf_cv_abi_version" != "x$withval"
	then
		AC_MSG_WARN(overriding ABI version $cf_cv_abi_version to $withval)
		case $cf_cv_rel_version in
		(5.*)
			cf_cv_rel_version=$withval.0
			;;
		(6.*)
			cf_cv_rel_version=$withval.9	# FIXME: should be 10 as of 6.0 release
			;;
		esac
	fi
	cf_cv_abi_version=$withval])
	CF_NUMBER_SYNTAX($cf_cv_abi_version,ABI version)
ifelse($1,,,[
$1_ABI=$cf_cv_abi_version
])
])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_EXPORT_SYMS version: 3 updated: 2014/12/20 19:16:08
dnl -------------------
dnl Use this with libtool to specify the list of symbols that may be exported.
dnl The input file contains one symbol per line; comments work with "#".
dnl
dnl $1 = basename of the ".sym" file (default $PACKAGE)
AC_DEFUN([CF_WITH_EXPORT_SYMS],
[
AC_MSG_CHECKING(if exported-symbols file should be used)
AC_ARG_WITH(export-syms,
	[  --with-export-syms=XXX  limit exported symbols using libtool],
	[with_export_syms=$withval],
	[with_export_syms=no])
if test "x$with_export_syms" = xyes
then
	with_export_syms='${top_srcdir}/package/ifelse($1,,${PACKAGE},[$1]).sym'
	AC_SUBST(PACKAGE)
fi
AC_MSG_RESULT($with_export_syms)
if test "x$with_export_syms" != xno
then
	EXPORT_SYMS="-export-symbols $with_export_syms"
	AC_SUBST(EXPORT_SYMS)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_LIBTOOL version: 33 updated: 2015/10/17 19:03:33
dnl ---------------
dnl Provide a configure option to incorporate libtool.  Define several useful
dnl symbols for the makefile rules.
dnl
dnl The reference to AC_PROG_LIBTOOL does not normally work, since it uses
dnl macros from libtool.m4 which is in the aclocal directory of automake.
dnl Following is a simple script which turns on the AC_PROG_LIBTOOL macro.
dnl But that still does not work properly since the macro is expanded outside
dnl the CF_WITH_LIBTOOL macro:
dnl
dnl	#!/bin/sh
dnl	ACLOCAL=`aclocal --print-ac-dir`
dnl	if test -z "$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=$with_libtool
	else
		AC_CHECK_TOOLS(LIBTOOL,[libtool glibtool],none)
		CF_LIBTOOL_VERSION
		if test -z "$cf_cv_libtool_version" && test "$LIBTOOL" = libtool
		then
			CF_FORGET_TOOL(LIBTOOL)
			AC_CHECK_TOOLS(LIBTOOL,[glibtool],none)
			CF_LIBTOOL_VERSION
		fi
	fi
	if test -z "$LIBTOOL" ; then
		AC_MSG_ERROR(Cannot find libtool)
	fi
])dnl
	LIB_CREATE='${LIBTOOL} --mode=link ${CC} -rpath ${DESTDIR}${libdir} ${LIBTOOL_VERSION} `cut -f1 ${top_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=:

	CF_CHECK_LIBTOOL_VERSION

	# special hack to add -no-undefined (which libtool should do for itself)
	LT_UNDEF=
	case "$cf_cv_system_name" in
	(cygwin*|msys*|mingw32*|os2*|uwin*|aix[[4-7]])
		LT_UNDEF=-no-undefined
		;;
	esac
	AC_SUBST([LT_UNDEF])

	# special hack to add --tag option for C++ compiler
	case $cf_cv_libtool_version in
	(1.[[5-9]]*|[[2-9]].[[0-9.a-z]]*)
		LIBTOOL_CXX="$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: 4 updated: 2015/04/17 21:13:04
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 .$with_libtool_opts in
(.yes|.no|.)
	;;
(*)
	LIBTOOL_OPTS="$LIBTOOL_OPTS $with_libtool_opts"
	;;
esac

AC_SUBST(LIBTOOL_OPTS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_NCURSES_ETC version: 5 updated: 2016/02/20 19:23:20
dnl -------------------
dnl Use this macro for programs which use any variant of "curses", e.g.,
dnl "ncurses", and "PDCurses".  Programs that can use curses and some unrelated
dnl library (such as slang) should use a "--with-screen=XXX" option.
dnl
dnl This does not use AC_DEFUN, because that would tell autoconf to run each
dnl of the macros inside this one - before this macro.
define([CF_WITH_NCURSES_ETC],[
CF_WITH_CURSES_DIR

cf_cv_screen=curses

AC_MSG_CHECKING(for specified curses library type)
AC_ARG_WITH(screen,
	[  --with-screen=XXX       use specified curses-libraries],
	[cf_cv_screen=$withval],[

AC_ARG_WITH(ncursesw,
	[  --with-ncursesw         use wide ncurses-libraries],
	[cf_cv_screen=ncursesw],[

AC_ARG_WITH(ncurses,
	[  --with-ncurses          use ncurses-libraries],
	[cf_cv_screen=ncurses],[

AC_ARG_WITH(pdcurses,
	[  --with-pdcurses         compile/link with pdcurses X11 library],
	[cf_cv_screen=pdcurses],[

AC_ARG_WITH(curses-colr,
	[  --with-curses-colr      compile/link with HPUX 10.x color-curses],
	[cf_cv_screen=curses_colr],[

AC_ARG_WITH(curses-5lib,
	[  --with-curses-5lib      compile/link with SunOS 5lib curses],
	[cf_cv_screen=curses_5lib])])])])])])

AC_MSG_RESULT($cf_cv_screen)

case $cf_cv_screen in
(curses|curses_*)
	CF_CURSES_CONFIG
	;;
(ncursesw*)
	CF_UTF8_LIB
	CF_NCURSES_CONFIG($cf_cv_screen)
	;;
(ncurses*)
	CF_NCURSES_CONFIG($cf_cv_screen)
	;;
(pdcurses)
	CF_PDCURSES_X11
	;;
(*)
	AC_MSG_ERROR(unexpected screen-value: $cf_cv_screen)
	;;
esac

CF_NCURSES_PTHREADS($cf_cv_screen)

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_NC_ALLOC_H version: 4 updated: 2008/11/01 12:44:02
dnl ------------------
dnl Applications that use ncurses can provide better leak-checking if they
dnl call ncurses' functions to free its memory on exit.  That is normally not
dnl configured (--disable-leaks), but is useful in a debugging library.
dnl
dnl Use this after checking for ncurses/ncursesw libraries.
AC_DEFUN([CF_WITH_NC_ALLOC_H],
[
AC_REQUIRE([CF_DISABLE_LEAKS])

case $LIBS in #(vi
*ncurses*)

if test "$with_no_leaks" = yes ; then
	AC_CHECK_HEADER(nc_alloc.h)
	AC_CHECK_FUNCS(_nc_free_and_exit)
fi
;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_REL_VERSION version: 1 updated: 2003/09/20 18:12:49
dnl -------------------
dnl Allow library's release-version to be overridden.  Generally this happens when a
dnl packager has incremented the release-version past that used in the original package,
dnl and wishes to keep doing this.
dnl
dnl $1 is the package name, if any, to derive corresponding {package}_MAJOR
dnl and {package}_MINOR symbols
dnl symbol.
AC_DEFUN([CF_WITH_REL_VERSION],[
test -z "$cf_cv_rel_version" && cf_cv_rel_version=0.0
AC_ARG_WITH(rel-version,
[  --with-rel-version=XXX  override derived release version],
[AC_MSG_WARN(overriding release version $cf_cv_rel_version to $withval)
 cf_cv_rel_version=$withval])
ifelse($1,,[
 CF_NUMBER_SYNTAX($cf_cv_rel_version,Release version)
],[
 $1_MAJOR=`echo "$cf_cv_rel_version" | sed -e 's/\..*//'`
 $1_MINOR=`echo "$cf_cv_rel_version" | sed -e 's/^[[^.]]*//' -e 's/^\.//' -e 's/\..*//'`
 CF_NUMBER_SYNTAX([$]$1_MAJOR,Release major-version)
 CF_NUMBER_SYNTAX([$]$1_MINOR,Release minor-version)
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_SHARED_OR_LIBTOOL version: 7 updated: 2014/11/02 16:11:49
dnl -------------------------
dnl Provide shared libraries using either autoconf macros (--with-shared) or
dnl using the external libtool script (--with-libtool).
dnl
dnl $1 = program name (all caps preferred)
dnl $1 = release version
dnl $2 = ABI version
define([CF_WITH_SHARED_OR_LIBTOOL],[

REL_VERSION=$2
ABI_VERSION=$3
cf_cv_rel_version=$REL_VERSION
AC_SUBST(ABI_VERSION)
AC_SUBST(REL_VERSION)

CF_WITH_REL_VERSION($1)
CF_WITH_ABI_VERSION

LIB_MODEL=static
DFT_LWR_MODEL=$LIB_MODEL
LIBTOOL_MAKE="#"

# use to comment-out makefile lines
MAKE_NORMAL=
MAKE_STATIC=
MAKE_SHARED="#"
MAKE_DLLS="#"

shlibdir=$libdir
AC_SUBST(shlibdir)

CF_WITH_LIBTOOL

LIB_CREATE="$LIB_CREATE \[$]@"

if test "$with_libtool" = "yes" ; then
	OBJEXT="lo"
	LIB_MODEL=libtool
	DFT_LWR_MODEL=$LIB_MODEL
	LIBTOOL_MAKE=
	CF_WITH_LIBTOOL_OPTS
	CF_WITH_EXPORT_SYMS
	MAKE_NORMAL="#"
	MAKE_STATIC="#"
	MAKE_SHARED=
else
	AC_MSG_CHECKING(if you want to build shared libraries)
	AC_ARG_WITH(shared,
		[  --with-shared           generate shared-libraries],
		[with_shared=$withval],
		[with_shared=no])
	AC_MSG_RESULT($with_shared)
	if test "$with_shared" = "yes" ; then
		LIB_MODEL=shared
		DFT_LWR_MODEL=$LIB_MODEL
		CF_SHARED_OPTS
		CF_WITH_VERSIONED_SYMS
		LIB_PREP=:
		LIB_CREATE="[$]MK_SHARED_LIB"
		CFLAGS="$CFLAGS $CC_SHARED_OPTS"
		MAKE_NORMAL="#"
		MAKE_STATIC="#"
		MAKE_SHARED=
	fi
fi

LIB_SUFFIX=
CF_LIB_SUFFIX($LIB_MODEL, DFT_LIB_SUFFIX, DFT_DEP_SUFFIX)
LIB_SUFFIX=$DFT_LIB_SUFFIX

AC_SUBST(DFT_LWR_MODEL)
AC_SUBST(DFT_LIB_SUFFIX)
AC_SUBST(DFT_DEP_SUFFIX)
AC_SUBST(LIB_MODEL)

AC_SUBST(LIBTOOL_MAKE)

AC_SUBST(MAKE_DLLS)
AC_SUBST(MAKE_NORMAL)
AC_SUBST(MAKE_SHARED)
AC_SUBST(MAKE_STATIC)
])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_VERSIONED_SYMS version: 7 updated: 2015/10/24 20:50:26
dnl ----------------------
dnl Use this when building shared library with ELF, to markup symbols with the
dnl version identifier from the given input file.  Generally that identifier is
dnl the same as the SONAME at which the symbol was first introduced.
dnl
dnl $1 = basename of the ".map" file (default $PACKAGE)
AC_DEFUN([CF_WITH_VERSIONED_SYMS],
[
AC_MSG_CHECKING(if versioned-symbols file should be used)
AC_ARG_WITH(versioned-syms,
	[  --with-versioned-syms=X markup versioned symbols using ld],
	[with_versioned_syms=$withval],
	[with_versioned_syms=no])
if test "x$with_versioned_syms" = xyes
then
	with_versioned_syms='${top_srcdir}/package/ifelse($1,,${PACKAGE},[$1]).map'
	AC_SUBST(PACKAGE)
fi
AC_MSG_RESULT($with_versioned_syms)

RESULTING_SYMS=
VERSIONED_SYMS=
WILDCARD_SYMS=

if test "x$with_versioned_syms" != xno
then
	RESULTING_SYMS=$with_versioned_syms
	case "x$MK_SHARED_LIB" in
	(*-Wl,*)
		VERSIONED_SYMS="-Wl,--version-script,\${RESULTING_SYMS}"
		MK_SHARED_LIB=`echo "$MK_SHARED_LIB" | sed -e "s%-Wl,%\\[$]{VERSIONED_SYMS} -Wl,%"`
		CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)
		;;
	(*-dy\ *)
		VERSIONED_SYMS="-Wl,-M,\${RESULTING_SYMS}"
		MK_SHARED_LIB=`echo "$MK_SHARED_LIB" | sed -e "s%-dy%\\[$]{VERSIONED_SYMS} -dy%"`
		CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)
		;;
	(*)
		AC_MSG_WARN(this system does not support versioned-symbols)
		;;
	esac

	# Linux ld can selectively override scope, e.g., of symbols beginning with
	# "_" by first declaring some as global, and then using a wildcard to
	# declare the others as local.  Some other loaders cannot do this.  Check
	# by constructing a (very) simple shared library and inspecting its
	# symbols.
	if test "x$VERSIONED_SYMS" != "x"
	then
		AC_MSG_CHECKING(if wildcards can be used to selectively omit symbols)
		WILDCARD_SYMS=no

		# make sources
		rm -f conftest.*

		cat >conftest.ver <<EOF
module_1.0 {
global:
	globalf1;
local:
	localf1;
};
module_2.0 {
global:
	globalf2;
local:
	localf2;
	_*;
} module_1.0;
submodule_1.0 {
global:
	subglobalf1;
	_ismissing;
local:
	sublocalf1;
};
submodule_2.0 {
global:
	subglobalf2;
local:
	sublocalf2;
	_*;
} submodule_1.0;
EOF
		cat >conftest.$ac_ext <<EOF
#line __oline__ "configure"
int	_ismissing(void) { return 1; }
int	_localf1(void) { return 1; }
int	_localf2(void) { return 2; }
int	globalf1(void) { return 1; }
int	globalf2(void) { return 2; }
int	_sublocalf1(void) { return 1; }
int	_sublocalf2(void) { return 2; }
int	subglobalf1(void) { return 1; }
int	subglobalf2(void) { return 2; }
EOF
		cat >conftest.mk <<EOF
CC=${CC}
CFLAGS=${CFLAGS}
CPPFLAGS=${CPPFLAGS}
LDFLAGS=${LDFLAGS}
LIBS=${LIBS}
VERSIONED_SYMS=${VERSIONED_SYMS}
RESULTING_SYMS=conftest.ver
MK_SHARED_LIB=${MK_SHARED_LIB}
conftest.so: conftest.$ac_cv_objext
		\$(MK_SHARED_LIB) conftest.$ac_cv_objext
EOF

		# compile source, make library
		if make -f conftest.mk 2>&AC_FD_CC >/dev/null
		then
			# test for missing symbol in either Data or Text section
			cf_missing=`nm -P conftest.so 2>&AC_FD_CC |fgrep _ismissing | egrep '[[ 	]][[DT]][[ 	]]'`
			test -n "$cf_missing" && WILDCARD_SYMS=yes
		fi
		AC_MSG_RESULT($WILDCARD_SYMS)
		rm -f conftest.*
	fi
fi
AC_SUBST(RESULTING_SYMS)
AC_SUBST(VERSIONED_SYMS)
AC_SUBST(WILDCARD_SYMS)
])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([$1])
fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_XOPEN_CURSES version: 13 updated: 2015/12/12 20:59:52
dnl ---------------
dnl Test if we should define X/Open source for curses, needed on Digital Unix
dnl 4.x, to see the extended functions, but breaks on IRIX 6.x.
dnl
dnl The getbegyx() check is needed for HPUX, which omits legacy macros such
dnl as getbegy().  The latter is better design, but the former is standard.
AC_DEFUN([CF_XOPEN_CURSES],
[
AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
AC_CACHE_CHECK(definition to turn on extended curses functions,cf_cv_need_xopen_extension,[
cf_cv_need_xopen_extension=unknown
AC_TRY_LINK([
#include <stdlib.h>
#include <${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
#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=none],
	[
	for cf_try_xopen_extension in _XOPEN_SOURCE_EXTENDED NCURSES_WIDECHAR
	do
		AC_TRY_LINK([
#define $cf_try_xopen_extension 1
#include <stdlib.h>
#include <${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=$cf_try_xopen_extension; break])
	done
	])
])

case $cf_cv_need_xopen_extension in
(*_*)
	CPPFLAGS="$CPPFLAGS -D$cf_cv_need_xopen_extension"
	;;
esac

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_XOPEN_SOURCE version: 52 updated: 2016/08/27 12:21:42
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],[
AC_REQUIRE([AC_CANONICAL_HOST])

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

case $host_os in
(aix[[4-7]]*)
	cf_xopen_source="-D_ALL_SOURCE"
	;;
(msys)
	cf_XOPEN_SOURCE=600
	;;
(darwin[[0-8]].*)
	cf_xopen_source="-D_APPLE_C_SOURCE"
	;;
(darwin*)
	cf_xopen_source="-D_DARWIN_C_SOURCE"
	cf_XOPEN_SOURCE=
	;;
(freebsd*|dragonfly*)
	# 5.x headers associate
	#	_XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
	#	_XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L
	cf_POSIX_C_SOURCE=200112L
	cf_XOPEN_SOURCE=600
	cf_xopen_source="-D_BSD_TYPES -D__BSD_VISIBLE -D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	;;
(hpux11*)
	cf_xopen_source="-D_HPUX_SOURCE -D_XOPEN_SOURCE=500"
	;;
(hpux*)
	cf_xopen_source="-D_HPUX_SOURCE"
	;;
(irix[[56]].*)
	cf_xopen_source="-D_SGI_SOURCE"
	cf_XOPEN_SOURCE=
	;;
(linux*|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin)
	CF_GNU_SOURCE
	;;
(minix*)
	cf_xopen_source="-D_NETBSD_SOURCE" # POSIX.1-2001 features are ifdef'd with this...
	;;
(mirbsd*)
	# setting _XOPEN_SOURCE or _POSIX_SOURCE breaks <sys/select.h> and other headers which use u_int / u_short types
	cf_XOPEN_SOURCE=
	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
	;;
(netbsd*)
	cf_xopen_source="-D_NETBSD_SOURCE" # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
	;;
(openbsd[[4-9]]*)
	# setting _XOPEN_SOURCE lower than 500 breaks g++ compile with wchar.h, needed for ncursesw
	cf_xopen_source="-D_BSD_SOURCE"
	cf_XOPEN_SOURCE=600
	;;
(openbsd*)
	# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
	;;
(osf[[45]]*)
	cf_xopen_source="-D_OSF_SOURCE"
	;;
(nto-qnx*)
	cf_xopen_source="-D_QNX_SOURCE"
	;;
(sco*)
	# setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
	;;
(solaris2.*)
	cf_xopen_source="-D__EXTENSIONS__"
	cf_cv_xopen_source=broken
	;;
(sysv4.2uw2.*) # Novell/SCO UnixWare 2.x (tested on 2.1.2)
	cf_XOPEN_SOURCE=
	cf_POSIX_C_SOURCE=
	;;
(*)
	CF_TRY_XOPEN_SOURCE
	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
	;;
esac

if test -n "$cf_xopen_source" ; then
	CF_ADD_CFLAGS($cf_xopen_source,true)
fi

dnl In anything but the default case, we may have system-specific setting
dnl which is still not guaranteed to provide all of the entrypoints that
dnl _XOPEN_SOURCE would yield.
if test -n "$cf_XOPEN_SOURCE" && test -z "$cf_cv_xopen_source" ; then
	AC_MSG_CHECKING(if _XOPEN_SOURCE really is set)
	AC_TRY_COMPILE([#include <stdlib.h>],[
#ifndef _XOPEN_SOURCE
make an error
#endif],
	[cf_XOPEN_SOURCE_set=yes],
	[cf_XOPEN_SOURCE_set=no])
	AC_MSG_RESULT($cf_XOPEN_SOURCE_set)
	if test $cf_XOPEN_SOURCE_set = yes
	then
		AC_TRY_COMPILE([#include <stdlib.h>],[
#if (_XOPEN_SOURCE - 0) < $cf_XOPEN_SOURCE
make an error
#endif],
		[cf_XOPEN_SOURCE_set_ok=yes],
		[cf_XOPEN_SOURCE_set_ok=no])
		if test $cf_XOPEN_SOURCE_set_ok = no
		then
			AC_MSG_WARN(_XOPEN_SOURCE is lower than requested)
		fi
	else
		CF_TRY_XOPEN_SOURCE
	fi
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_X_ATHENA version: 23 updated: 2015/04/12 15:39:00
dnl -----------
dnl Check for Xaw (Athena) libraries
dnl
dnl Sets $cf_x_athena according to the flavor of Xaw which is used.
AC_DEFUN([CF_X_ATHENA],
[
cf_x_athena=${cf_x_athena:-Xaw}

AC_MSG_CHECKING(if you want to link with Xaw 3d library)
withval=
AC_ARG_WITH(Xaw3d,
	[  --with-Xaw3d            link with Xaw 3d library])
if test "$withval" = yes ; then
	cf_x_athena=Xaw3d
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(if you want to link with Xaw 3d xft library)
withval=
AC_ARG_WITH(Xaw3dxft,
	[  --with-Xaw3dxft         link with Xaw 3d xft library])
if test "$withval" = yes ; then
	cf_x_athena=Xaw3dxft
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(if you want to link with neXT Athena library)
withval=
AC_ARG_WITH(neXtaw,
	[  --with-neXtaw           link with neXT Athena library])
if test "$withval" = yes ; then
	cf_x_athena=neXtaw
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(if you want to link with Athena-Plus library)
withval=
AC_ARG_WITH(XawPlus,
	[  --with-XawPlus          link with Athena-Plus library])
if test "$withval" = yes ; then
	cf_x_athena=XawPlus
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

cf_x_athena_lib=""

if test "$PKG_CONFIG" != none ; then
	cf_athena_list=
	test "$cf_x_athena" = Xaw && cf_athena_list="xaw8 xaw7 xaw6"
	for cf_athena_pkg in \
		$cf_athena_list \
		${cf_x_athena} \
		${cf_x_athena}-devel \
		lib${cf_x_athena} \
		lib${cf_x_athena}-devel
	do
		CF_TRY_PKG_CONFIG($cf_athena_pkg,[
			cf_x_athena_lib="$cf_pkgconfig_libs"
			CF_UPPER(cf_x_athena_LIBS,HAVE_LIB_$cf_x_athena)
			AC_DEFINE_UNQUOTED($cf_x_athena_LIBS)

			CF_TRIM_X_LIBS

AC_CACHE_CHECK(for usable $cf_x_athena/Xmu package,cf_cv_xaw_compat,[
AC_TRY_LINK([
#include <X11/Xmu/CharSet.h>
],[
int check = XmuCompareISOLatin1("big", "small")
],[cf_cv_xaw_compat=yes],[cf_cv_xaw_compat=no])])

			if test "$cf_cv_xaw_compat" = no
			then
				# workaround for broken ".pc" files...
				case "$cf_x_athena_lib" in
				(*-lXmu*)
					;;
				(*)
					CF_VERBOSE(work around broken package)
					cf_save_xmu="$LIBS"
					cf_first_lib=`echo "$cf_save_xmu" | sed -e 's/^[ ][ ]*//' -e 's/ .*//'`
					CF_TRY_PKG_CONFIG(xmu,[
							LIBS="$cf_save_xmu"
							CF_ADD_LIB_AFTER($cf_first_lib,$cf_pkgconfig_libs)
						],[
							CF_ADD_LIB_AFTER($cf_first_lib,-lXmu)
						])
					CF_TRIM_X_LIBS
					;;
				esac
			fi

			break])
	done
fi

if test -z "$cf_x_athena_lib" ; then
	CF_X_EXT
	CF_X_TOOLKIT
	CF_X_ATHENA_CPPFLAGS($cf_x_athena)
	CF_X_ATHENA_LIBS($cf_x_athena)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_X_ATHENA_CPPFLAGS version: 5 updated: 2010/05/26 17:35:30
dnl --------------------
dnl Normally invoked by CF_X_ATHENA, with $1 set to the appropriate flavor of
dnl the Athena widgets, e.g., Xaw, Xaw3d, neXtaw.
AC_DEFUN([CF_X_ATHENA_CPPFLAGS],
[
cf_x_athena_root=ifelse([$1],,Xaw,[$1])
cf_x_athena_inc=""

for cf_path in default \
	/usr/contrib/X11R6 \
	/usr/contrib/X11R5 \
	/usr/lib/X11R5 \
	/usr/local
do
	if test -z "$cf_x_athena_inc" ; then
		cf_save="$CPPFLAGS"
		cf_test=X11/$cf_x_athena_root/SimpleMenu.h
		if test $cf_path != default ; then
			CPPFLAGS="$cf_save -I$cf_path/include"
			AC_MSG_CHECKING(for $cf_test in $cf_path)
		else
			AC_MSG_CHECKING(for $cf_test)
		fi
		AC_TRY_COMPILE([
#include <X11/Intrinsic.h>
#include <$cf_test>],[],
			[cf_result=yes],
			[cf_result=no])
		AC_MSG_RESULT($cf_result)
		if test "$cf_result" = yes ; then
			cf_x_athena_inc=$cf_path
			break
		else
			CPPFLAGS="$cf_save"
		fi
	fi
done

if test -z "$cf_x_athena_inc" ; then
	AC_MSG_WARN(
[Unable to successfully find Athena header files with test program])
elif test "$cf_x_athena_inc" != default ; then
	CPPFLAGS="$CPPFLAGS -I$cf_x_athena_inc"
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_X_ATHENA_LIBS version: 12 updated: 2011/07/17 19:55:02
dnl ----------------
dnl Normally invoked by CF_X_ATHENA, with $1 set to the appropriate flavor of
dnl the Athena widgets, e.g., Xaw, Xaw3d, neXtaw.
AC_DEFUN([CF_X_ATHENA_LIBS],
[AC_REQUIRE([CF_X_TOOLKIT])
cf_x_athena_root=ifelse([$1],,Xaw,[$1])
cf_x_athena_lib=""

for cf_path in default \
	/usr/contrib/X11R6 \
	/usr/contrib/X11R5 \
	/usr/lib/X11R5 \
	/usr/local
do
	for cf_lib in \
		${cf_x_athena_root} \
		${cf_x_athena_root}7 \
		${cf_x_athena_root}6
	do
	for cf_libs in \
		"-l$cf_lib -lXmu" \
		"-l$cf_lib -lXpm -lXmu" \
		"-l${cf_lib}_s -lXmu_s"
	do
		if test -z "$cf_x_athena_lib" ; then
			cf_save="$LIBS"
			cf_test=XawSimpleMenuAddGlobalActions
			if test $cf_path != default ; then
				CF_ADD_LIBS(-L$cf_path/lib $cf_libs)
				AC_MSG_CHECKING(for $cf_libs in $cf_path)
			else
				CF_ADD_LIBS($cf_libs)
				AC_MSG_CHECKING(for $cf_test in $cf_libs)
			fi
			AC_TRY_LINK([
#include <X11/Intrinsic.h>
#include <X11/$cf_x_athena_root/SimpleMenu.h>
],[
$cf_test((XtAppContext) 0)],
				[cf_result=yes],
				[cf_result=no])
			AC_MSG_RESULT($cf_result)
			if test "$cf_result" = yes ; then
				cf_x_athena_lib="$cf_libs"
				break
			fi
			LIBS="$cf_save"
		fi
	done # cf_libs
		test -n "$cf_x_athena_lib" && break
	done # cf_lib
done

if test -z "$cf_x_athena_lib" ; then
	AC_MSG_ERROR(
[Unable to successfully link Athena library (-l$cf_x_athena_root) with test program])
fi

CF_UPPER(cf_x_athena_LIBS,HAVE_LIB_$cf_x_athena)
AC_DEFINE_UNQUOTED($cf_x_athena_LIBS)
])
dnl ---------------------------------------------------------------------------
dnl CF_X_EXT version: 3 updated: 2010/06/02 05:03:05
dnl --------
AC_DEFUN([CF_X_EXT],[
CF_TRY_PKG_CONFIG(Xext,,[
	AC_CHECK_LIB(Xext,XextCreateExtension,
		[CF_ADD_LIB(Xext)])])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_X_TOOLKIT version: 23 updated: 2015/04/12 15:39:00
dnl ------------
dnl Check for X Toolkit libraries
AC_DEFUN([CF_X_TOOLKIT],
[
AC_REQUIRE([AC_PATH_XTRA])
AC_REQUIRE([CF_CHECK_CACHE])

# OSX is schizoid about who owns /usr/X11 (old) versus /opt/X11 (new), and (and
# in some cases has installed dummy files in the former, other cases replaced
# it with a link to the new location).  This complicates the configure script.
# Check for that pitfall, and recover using pkg-config
#
# If none of these are set, the configuration is almost certainly broken.
if test -z "${X_CFLAGS}${X_PRE_LIBS}${X_LIBS}${X_EXTRA_LIBS}"
then
	CF_TRY_PKG_CONFIG(x11,,[AC_MSG_WARN(unable to find X11 library)])
	CF_TRY_PKG_CONFIG(ice,,[AC_MSG_WARN(unable to find ICE library)])
	CF_TRY_PKG_CONFIG(sm,,[AC_MSG_WARN(unable to find SM library)])
	CF_TRY_PKG_CONFIG(xt,,[AC_MSG_WARN(unable to find Xt library)])
fi

cf_have_X_LIBS=no

CF_TRY_PKG_CONFIG(xt,[

	case "x$LIBS" in
	(*-lX11*)
		;;
	(*)
# we have an "xt" package, but it may omit Xt's dependency on X11
AC_CACHE_CHECK(for usable X dependency,cf_cv_xt_x11_compat,[
AC_TRY_LINK([
#include <X11/Xlib.h>
],[
	int rc1 = XDrawLine((Display*) 0, (Drawable) 0, (GC) 0, 0, 0, 0, 0);
	int rc2 = XClearWindow((Display*) 0, (Window) 0);
	int rc3 = XMoveWindow((Display*) 0, (Window) 0, 0, 0);
	int rc4 = XMoveResizeWindow((Display*)0, (Window)0, 0, 0, 0, 0);
],[cf_cv_xt_x11_compat=yes],[cf_cv_xt_x11_compat=no])])
		if test "$cf_cv_xt_x11_compat" = no
		then
			CF_VERBOSE(work around broken X11 dependency)
			# 2010/11/19 - good enough until a working Xt on Xcb is delivered.
			CF_TRY_PKG_CONFIG(x11,,[CF_ADD_LIB_AFTER(-lXt,-lX11)])
		fi
		;;
	esac

AC_CACHE_CHECK(for usable X Toolkit package,cf_cv_xt_ice_compat,[
AC_TRY_LINK([
#include <X11/Shell.h>
],[int num = IceConnectionNumber(0)
],[cf_cv_xt_ice_compat=yes],[cf_cv_xt_ice_compat=no])])

	if test "$cf_cv_xt_ice_compat" = no
	then
		# workaround for broken ".pc" files used for X Toolkit.
		case "x$X_PRE_LIBS" in
		(*-lICE*)
			case "x$LIBS" in
			(*-lICE*)
				;;
			(*)
				CF_VERBOSE(work around broken ICE dependency)
				CF_TRY_PKG_CONFIG(ice,
					[CF_TRY_PKG_CONFIG(sm)],
					[CF_ADD_LIB_AFTER(-lXt,$X_PRE_LIBS)])
				;;
			esac
			;;
		esac
	fi

	cf_have_X_LIBS=yes
],[

	LDFLAGS="$X_LIBS $LDFLAGS"
	CF_CHECK_CFLAGS($X_CFLAGS)

	AC_CHECK_FUNC(XOpenDisplay,,[
	AC_CHECK_LIB(X11,XOpenDisplay,
		[CF_ADD_LIB(X11)],,
		[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])

	AC_CHECK_FUNC(XtAppInitialize,,[
	AC_CHECK_LIB(Xt, XtAppInitialize,
		[AC_DEFINE(HAVE_LIBXT,1,[Define to 1 if we can compile with the Xt library])
		 cf_have_X_LIBS=Xt
		 LIBS="-lXt $X_PRE_LIBS $LIBS $X_EXTRA_LIBS"],,
		[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
])

if test $cf_have_X_LIBS = no ; then
	AC_MSG_WARN(
[Unable to successfully link X Toolkit library (-lXt) with
test program.  You will have to check and add the proper libraries by hand
to makefile.])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF__ADD_SHLIB_RULES version: 6 updated: 2016/04/21 21:07:50
dnl -------------------
dnl Append rules for creating, installing, uninstalling and cleaning library.
dnl In particular, this is needed for shared libraries since there are symbolic
dnl links which depend on configuration choices.
dnl
dnl The logic is controlled by these cache variables:
dnl $cf_cv_do_symlinks
dnl $cf_cv_shlib_version
dnl
dnl The macro uses variables set by CF__DEFINE_SHLIB_VARS
dnl
dnl $1 = makefile to append to
dnl $2 = model (static, shared, libtool)
dnl $3 = objects (dependencies)
dnl $4 = additional libraries needed to link the shared library
define([CF__ADD_SHLIB_RULES],[

CF__DEFINE_LIB_TARGET

case x$2 in
(xlibtool|xshared)
	cf_libdeps="ifelse($4,,,[$4])"
	;;
(x*)
	cf_libdeps=
	;;
esac

cat >>$1 <<CF_EOF

# generated by CF__ADD_SHLIB_RULES
# libmodel: $2
# symlinks: $cf_cv_do_symlinks
# shlibver: $cf_cv_shlib_version

CF_EOF

cat >>$1 <<CF_EOF
$cf_libname :: \\
CF_EOF

cat >>$1 <<CF_EOF
		$3
	@echo linking \[$]@
	\$(LIBTOOL_CREATE) $3 $cf_libdeps
CF_EOF

if test "x$cf_cv_do_symlinks" = xyes
then
cat >>$1 <<CF_EOF
	\$(LN_S) $cf_libname $cf_liblink
	\$(LN_S) $cf_liblink $cf_libroot
CF_EOF
fi

cat >>$1 <<CF_EOF

install \\
install.libs :: \$(DESTDIR)\$(libdir)/$cf_libname

\$(DESTDIR)\$(libdir)/$cf_libname :: \\
		\$(DESTDIR)\$(libdir) \\
		$3
	@echo linking \[$]@
	\$(LIBTOOL_CREATE) $3 $cf_libdeps
CF_EOF

if test "x$cf_cv_do_symlinks" = xyes
then
cat >>$1 <<CF_EOF
	cd \$(DESTDIR)\$(libdir) && (\$(LN_S) $cf_libname $cf_liblink; \$(LN_S) $cf_liblink $cf_libroot; )
CF_EOF
fi

if test x$2 = xshared
then
cat >>$1 <<CF_EOF
	- \$(SHELL) -c "if test -z "\$(DESTDIR)" ; then /sbin/ldconfig; fi"
CF_EOF
fi

cat >>$1 <<CF_EOF

uninstall \\
uninstall.libs ::
	@echo uninstalling \$(DESTDIR)\$(libdir)/$cf_libname
CF_EOF

if test "x$cf_cv_do_symlinks" = xyes
then
cat >>$1 <<CF_EOF
	-rm -f \$(DESTDIR)\$(libdir)/$cf_libroot
	-rm -f \$(DESTDIR)\$(libdir)/$cf_liblink
CF_EOF
fi

cat >>$1 <<CF_EOF
	-rm -f \$(DESTDIR)\$(libdir)/$cf_libname

clean \\
clean.libs ::
CF_EOF

if test "x$cf_cv_do_symlinks" = xyes
then
cat >>$1 <<CF_EOF
	-rm -f $cf_libroot
	-rm -f $cf_liblink
CF_EOF
fi

cat >>$1 <<CF_EOF
	-rm -f $cf_libname

mostlyclean::
	-rm -f $3
# end generated by CF__ADD_SHLIB_RULES
CF_EOF
])dnl
dnl ---------------------------------------------------------------------------
dnl CF__CURSES_HEAD version: 2 updated: 2010/10/23 15:54:49
dnl ---------------
dnl Define a reusable chunk which includes <curses.h> and <term.h> when they
dnl are both available.
define([CF__CURSES_HEAD],[
#ifdef HAVE_XCURSES
#include <xcurses.h>
char * XCursesProgramName = "test";
#else
#include <${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__DEFINE_LIB_TARGET version: 2 updated: 2015/05/10 19:52:14
dnl ---------------------
define([CF__DEFINE_LIB_TARGET],[
cf_libname=\${LIB_BASENAME}
cf_liblink=$cf_libname
cf_libroot=$cf_libname

if test "x$cf_cv_do_symlinks" = xyes
then
	case "x$cf_cv_shlib_version" in
	(xrel)
		cf_liblink="\${LIB_ABI_NAME}"
		cf_libname="\${LIB_REL_NAME}"
		;;
	(xabi)
		cf_liblink="\${LIB_REL_NAME}"
		cf_libname="\${LIB_ABI_NAME}"
		;;
	esac
fi
LIB_TARGET=$cf_libname
])dnl
dnl ---------------------------------------------------------------------------
dnl CF__DEFINE_SHLIB_VARS version: 4 updated: 2015/09/28 17:49:10
dnl ---------------------
dnl Substitute makefile variables useful for CF__ADD_SHLIB_RULES.
dnl
dnl The substitution requires these variables:
dnl		LIB_PREFIX - "lib"
dnl		LIB_ROOTNAME - "foo"
dnl		LIB_SUFFIX - ".so"
dnl		REL_VERSION - "5.0"
dnl		ABI_VERSION - "4.2.4"
define([CF__DEFINE_SHLIB_VARS],[
CF__DEFINE_LIB_TARGET
SET_SHLIB_VARS="# begin CF__DEFINE_SHLIB_VARS\\
LIB_BASENAME	= \${LIB_PREFIX}\${LIB_ROOTNAME}\${LIB_SUFFIX}\\
LIB_REL_NAME	= \${LIB_BASENAME}.\${REL_VERSION}\\
LIB_ABI_NAME	= \${LIB_BASENAME}.\${ABI_VERSION}\\
LIB_TARGET	= $LIB_TARGET\\
RM_SHARED_OPTS	= $RM_SHARED_OPTS\\
# end CF__DEFINE_SHLIB_VARS"
AC_SUBST(SET_SHLIB_VARS)
AC_SUBST(LIB_TARGET)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF__INIT_SHLIB_RULES version: 2 updated: 2013/07/27 17:38:32
dnl --------------------
dnl The third parameter to AC_OUTPUT, used to pass variables needed for
dnl CF__ADD_SHLIB_RULES.
define([CF__INIT_SHLIB_RULES],[
ABI_VERSION="$ABI_VERSION"
REL_VERSION="$REL_VERSION"
LIB_MODEL="$LIB_MODEL"
LIB_PREFIX="$LIB_PREFIX"
LIB_ROOTNAME="$LIB_ROOTNAME"
DFT_DEP_SUFFIX="$DFT_DEP_SUFFIX"
RM_SHARED_OPTS="$RM_SHARED_OPTS"
cf_cv_do_symlinks="$cf_cv_do_symlinks"
cf_cv_shlib_version="$cf_cv_shlib_version"
])