xref: /third_party/ncurses/Ada95/aclocal.m4

dnl***************************************************************************
dnl Copyright 2018-2023,2024 Thomas E. Dickey                                *
dnl Copyright 2010-2017,2018 Free Software Foundation, Inc.                  *
dnl                                                                          *
dnl Permission is hereby granted, free of charge, to any person obtaining a  *
dnl copy of this software and associated documentation files (the            *
dnl "Software"), to deal in the Software without restriction, including      *
dnl without limitation the rights to use, copy, modify, merge, publish,      *
dnl distribute, distribute with modifications, sublicense, and/or sell       *
dnl copies of the Software, and to permit persons to whom the Software is    *
dnl furnished to do so, subject to the following conditions:                 *
dnl                                                                          *
dnl The above copyright notice and this permission notice shall be included  *
dnl in all copies or substantial portions of the Software.                   *
dnl                                                                          *
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
dnl IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
dnl THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
dnl                                                                          *
dnl Except as contained in this notice, the name(s) of the above copyright   *
dnl holders shall not be used in advertising or otherwise to promote the     *
dnl sale, use or other dealings in this Software without prior written       *
dnl authorization.                                                           *
dnl***************************************************************************
dnl
dnl Author: Thomas E. Dickey
dnl
dnl $Id: aclocal.m4,v 1.210 2024/03/30 22:17:13 tom Exp $
dnl Macros used in NCURSES Ada95 auto-configuration script.
dnl
dnl These macros are maintained separately from NCURSES.  The copyright on
dnl this file applies to the aggregation of macros and does not affect use of
dnl these macros in other applications.
dnl
dnl See these pages for additional information:
dnl		https://invisible-island.net/autoconf/
dnl		https://invisible-island.net/autoconf/my-autoconf.html
dnl
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_ADA_INCLUDE_DIRS version: 8 updated: 2013/10/14 04:24:07
dnl -------------------
dnl Construct the list of include-options for the C programs in the Ada95
dnl binding.
AC_DEFUN([CF_ADA_INCLUDE_DIRS],
[
ACPPFLAGS="-I. -I../include -I../../include $ACPPFLAGS"
if test "$srcdir" != "."; then
	ACPPFLAGS="-I\${srcdir}/../../include $ACPPFLAGS"
fi
if test "$GCC" != yes; then
	ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
elif test "$includedir" != "/usr/include"; then
	if test "$includedir" = '${prefix}/include' ; then
		if test x$prefix != x/usr ; then
			ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
		fi
	else
		ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
	fi
fi
AC_SUBST(ACPPFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_ADAFLAGS version: 1 updated: 2010/06/19 15:22:18
dnl ---------------
dnl Add to $ADAFLAGS, which is substituted into makefile and scripts.
AC_DEFUN([CF_ADD_ADAFLAGS],[
 	ADAFLAGS="$ADAFLAGS $1"
	AC_SUBST(ADAFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_CFLAGS version: 15 updated: 2020/12/31 10:54:15
dnl -------------
dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
dnl $1 = flags to add
dnl $2 = 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 "$cf_fix_cppflags" = yes ; then
				CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
				continue
			elif test "${cf_tst_cflags}" = "\"'" ; then
				CF_APPEND_TEXT(cf_new_extra_cppflags,$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_APPEND_TEXT(cf_new_cppflags,$cf_add_cflags)
			;;
		esac
		;;
	(*)
		CF_APPEND_TEXT(cf_new_cflags,$cf_add_cflags)
		;;
	esac
	;;
(yes)
	CF_APPEND_TEXT(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 $cf_new_cflags)])
	CF_APPEND_TEXT(CFLAGS,$cf_new_cflags)
fi

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

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

AC_SUBST(EXTRA_CPPFLAGS)

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_INCDIR version: 17 updated: 2021/09/04 06:35:04
dnl -------------
dnl Add an include-directory to $CPPFLAGS.  Don't add /usr/include, since it is
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
			  CF_APPEND_TEXT(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: 11 updated: 2020/12/31 20:19:42
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: 3 updated: 2019/11/02 16:47:33
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 $LIBS)
AC_DEFUN([CF_ADD_LIBS],[
cf_add_libs="[$]ifelse($2,,LIBS,[$2])"
# reverse order
cf_add_0lib=
for cf_add_1lib in $1; do cf_add_0lib="$cf_add_1lib $cf_add_0lib"; done
# filter duplicates
for cf_add_1lib in $cf_add_0lib; 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_1lib $cf_add_libs"
done
ifelse($2,,LIBS,[$2])="$cf_add_libs"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_SUBDIR_PATH version: 5 updated: 2020/12/31 20:19:42
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_APPEND_CFLAGS version: 3 updated: 2021/09/05 17:25:40
dnl ----------------
dnl Use CF_ADD_CFLAGS after first checking for potential redefinitions.
dnl $1 = flags to add
dnl $2 = if given makes this macro verbose.
define([CF_APPEND_CFLAGS],
[
for cf_add_cflags in $1
do
	case "x$cf_add_cflags" in
	(x-[[DU]]*)
		CF_REMOVE_CFLAGS($cf_add_cflags,CFLAGS,[$2])
		CF_REMOVE_CFLAGS($cf_add_cflags,CPPFLAGS,[$2])
		;;
	esac
	CF_ADD_CFLAGS([$cf_add_cflags],[$2])
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_APPEND_TEXT version: 1 updated: 2017/02/25 18:58:55
dnl --------------
dnl use this macro for appending text without introducing an extra blank at
dnl the beginning
define([CF_APPEND_TEXT],
[
	test -n "[$]$1" && $1="[$]$1 "
	$1="[$]{$1}$2"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
dnl --------------
dnl Allow user to disable a normally-on option.
AC_DEFUN([CF_ARG_DISABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],yes)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_ENABLE version: 3 updated: 1999/03/30 17:24:31
dnl -------------
dnl Allow user to enable a normally-off option.
AC_DEFUN([CF_ARG_ENABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],no)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_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_AR_FLAGS version: 9 updated: 2021/01/01 13:31:04
dnl -----------
dnl Check for suitable "ar" (archiver) options for updating an archive.
dnl
dnl In particular, handle some obsolete cases where the "-" might be omitted,
dnl as well as a workaround for breakage of make's archive rules by the GNU
dnl binutils "ar" program.
AC_DEFUN([CF_AR_FLAGS],[
AC_REQUIRE([CF_PROG_AR])

AC_CACHE_CHECK(for options to update archives, cf_cv_ar_flags,[
	case "$cf_cv_system_name" in
	(*-msvc*)
		cf_cv_ar_flags=''
		cat >mk_static_lib.sh <<-EOF
		#!$SHELL
		MSVC_BIN="[$]AR"
		out="\[$]1"
		shift
		exec \[$]MSVC_BIN -out:"\[$]out" \[$]@
		EOF
		chmod +x mk_static_lib.sh
		AR=`pwd`/mk_static_lib.sh
		;;
	(*)
		cf_cv_ar_flags=unknown
		for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
		do

			# check if $ARFLAGS already contains this choice
			if test "x$ARFLAGS" != "x" ; then
				cf_check_ar_flags=`echo "x$ARFLAGS" | sed -e "s/$cf_ar_flags\$//" -e "s/$cf_ar_flags / /"`
				if test "x$ARFLAGS" != "$cf_check_ar_flags" ; then
					cf_cv_ar_flags=
					break
				fi
			fi

			rm -f "conftest.$ac_cv_objext"
			rm -f conftest.a

			cat >"conftest.$ac_ext" <<EOF
#line __oline__ "configure"
int	testdata[[3]] = { 123, 456, 789 };
EOF
			if AC_TRY_EVAL(ac_compile) ; then
				echo "$AR $ARFLAGS $cf_ar_flags conftest.a conftest.$ac_cv_objext" >&AC_FD_CC
				$AR $ARFLAGS "$cf_ar_flags" conftest.a "conftest.$ac_cv_objext" 2>&AC_FD_CC 1>/dev/null
				if test -f conftest.a ; then
					cf_cv_ar_flags="$cf_ar_flags"
					break
				fi
			else
				CF_VERBOSE(cannot compile test-program)
				break
			fi
		done
		rm -f conftest.a "conftest.$ac_ext" "conftest.$ac_cv_objext"
		;;
	esac
])

if test -n "$ARFLAGS" ; then
	if test -n "$cf_cv_ar_flags" ; then
		ARFLAGS="$ARFLAGS $cf_cv_ar_flags"
	fi
else
	ARFLAGS=$cf_cv_ar_flags
fi

AC_SUBST(ARFLAGS)
])
dnl ---------------------------------------------------------------------------
dnl CF_BUILD_CC version: 11 updated: 2022/12/04 15:40:08
dnl -----------
dnl If we're cross-compiling, allow the user to override the tools and their
dnl options.  The configure script is oriented toward identifying the host
dnl compiler, etc., but we need a build compiler to generate parts of the
dnl source.
dnl
dnl $1 = default for $CPPFLAGS
dnl $2 = default for $LIBS
AC_DEFUN([CF_BUILD_CC],[
CF_ACVERSION_CHECK(2.52,,
	[AC_REQUIRE([CF_PROG_EXT])])
if test "$cross_compiling" = yes ; then

	# defaults that we might want to override
	: ${BUILD_CFLAGS:=''}
	: ${BUILD_CPPFLAGS:='ifelse([$1],,,[$1])'}
	: ${BUILD_LDFLAGS:=''}
	: ${BUILD_LIBS:='ifelse([$2],,,[$2])'}
	: ${BUILD_EXEEXT:='$x'}
	: ${BUILD_OBJEXT:='o'}

	AC_ARG_WITH(build-cc,
		[  --with-build-cc=XXX     the build C compiler ($BUILD_CC)],
		[BUILD_CC="$withval"],
		[AC_CHECK_PROGS(BUILD_CC, [gcc clang c99 c89 cc cl],none)])
	AC_MSG_CHECKING(for native build C compiler)
	AC_MSG_RESULT($BUILD_CC)

	AC_MSG_CHECKING(for native build C preprocessor)
	AC_ARG_WITH(build-cpp,
		[  --with-build-cpp=XXX    the build C preprocessor ($BUILD_CPP)],
		[BUILD_CPP="$withval"],
		[BUILD_CPP='${BUILD_CC} -E'])
	AC_MSG_RESULT($BUILD_CPP)

	AC_MSG_CHECKING(for native build C flags)
	AC_ARG_WITH(build-cflags,
		[  --with-build-cflags=XXX the build C compiler-flags ($BUILD_CFLAGS)],
		[BUILD_CFLAGS="$withval"])
	AC_MSG_RESULT($BUILD_CFLAGS)

	AC_MSG_CHECKING(for native build C preprocessor-flags)
	AC_ARG_WITH(build-cppflags,
		[  --with-build-cppflags=XXX the build C preprocessor-flags ($BUILD_CPPFLAGS)],
		[BUILD_CPPFLAGS="$withval"])
	AC_MSG_RESULT($BUILD_CPPFLAGS)

	AC_MSG_CHECKING(for native build linker-flags)
	AC_ARG_WITH(build-ldflags,
		[  --with-build-ldflags=XXX the build linker-flags ($BUILD_LDFLAGS)],
		[BUILD_LDFLAGS="$withval"])
	AC_MSG_RESULT($BUILD_LDFLAGS)

	AC_MSG_CHECKING(for native build linker-libraries)
	AC_ARG_WITH(build-libs,
		[  --with-build-libs=XXX   the build libraries (${BUILD_LIBS})],
		[BUILD_LIBS="$withval"])
	AC_MSG_RESULT($BUILD_LIBS)

	# this assumes we're on Unix.
	BUILD_EXEEXT=
	BUILD_OBJEXT=o

	: ${BUILD_CC:='${CC}'}

	AC_MSG_CHECKING(if the build-compiler "$BUILD_CC" works)

	cf_save_crossed=$cross_compiling
	cf_save_ac_link=$ac_link
	cross_compiling=no
	cf_build_cppflags=$BUILD_CPPFLAGS
	test "$cf_build_cppflags" = "#" && cf_build_cppflags=
	ac_link='$BUILD_CC -o "conftest$ac_exeext" $BUILD_CFLAGS $cf_build_cppflags $BUILD_LDFLAGS "conftest.$ac_ext" $BUILD_LIBS >&AS_MESSAGE_LOG_FD'

	AC_TRY_RUN([#include <stdio.h>
		int main(int argc, char *argv[])
		{
			${cf_cv_main_return:-return}(argc < 0 || argv == 0 || argv[0] == 0);
		}
	],
		cf_ok_build_cc=yes,
		cf_ok_build_cc=no,
		cf_ok_build_cc=unknown)

	cross_compiling=$cf_save_crossed
	ac_link=$cf_save_ac_link

	AC_MSG_RESULT($cf_ok_build_cc)

	if test "$cf_ok_build_cc" != yes
	then
		AC_MSG_ERROR([Cross-build requires two compilers.
Use --with-build-cc to specify the native compiler.])
	fi

else
	: ${BUILD_CC:='${CC}'}
	: ${BUILD_CPP:='${CPP}'}
	: ${BUILD_CFLAGS:='${CFLAGS}'}
	: ${BUILD_CPPFLAGS:='${CPPFLAGS}'}
	: ${BUILD_LDFLAGS:='${LDFLAGS}'}
	: ${BUILD_LIBS:='${LIBS}'}
	: ${BUILD_EXEEXT:='$x'}
	: ${BUILD_OBJEXT:='o'}
fi

AC_SUBST(BUILD_CC)
AC_SUBST(BUILD_CPP)
AC_SUBST(BUILD_CFLAGS)
AC_SUBST(BUILD_CPPFLAGS)
AC_SUBST(BUILD_LDFLAGS)
AC_SUBST(BUILD_LIBS)
AC_SUBST(BUILD_EXEEXT)
AC_SUBST(BUILD_OBJEXT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_C11_NORETURN version: 4 updated: 2023/02/18 17:41:25
dnl ---------------
AC_DEFUN([CF_C11_NORETURN],
[
AC_MSG_CHECKING(if you want to use C11 _Noreturn feature)
CF_ARG_ENABLE(stdnoreturn,
	[  --enable-stdnoreturn    enable C11 _Noreturn feature for diagnostics],
	[enable_stdnoreturn=yes],
	[enable_stdnoreturn=no])
AC_MSG_RESULT($enable_stdnoreturn)

if test $enable_stdnoreturn = yes; then
AC_CACHE_CHECK([for C11 _Noreturn feature], cf_cv_c11_noreturn,
	[AC_TRY_COMPILE([
$ac_includes_default
#include <stdnoreturn.h>
static _Noreturn void giveup(void) { exit(0); }
	],
	[if (feof(stdin)) giveup()],
	cf_cv_c11_noreturn=yes,
	cf_cv_c11_noreturn=no)
	])
else
	cf_cv_c11_noreturn=no,
fi

if test "$cf_cv_c11_noreturn" = yes; then
	AC_DEFINE(HAVE_STDNORETURN_H, 1,[Define if <stdnoreturn.h> header is available and working])
	AC_DEFINE_UNQUOTED(STDC_NORETURN,_Noreturn,[Define if C11 _Noreturn keyword is supported])
	HAVE_STDNORETURN_H=1
else
	HAVE_STDNORETURN_H=0
fi

AC_SUBST(HAVE_STDNORETURN_H)
AC_SUBST(STDC_NORETURN)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CC_ENV_FLAGS version: 11 updated: 2023/02/20 11:15:46
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(\$CFLAGS variable)
case "x$CFLAGS" in
(*-[[IUD]]*)
	AC_MSG_RESULT(broken)
	AC_MSG_WARN(your environment uses the CFLAGS variable to hold CPPFLAGS options)
	cf_flags="$CFLAGS"
	CFLAGS=
	for cf_arg in $cf_flags
	do
		CF_ADD_CFLAGS($cf_arg)
	done
	;;
(*)
	AC_MSG_RESULT(ok)
	;;
esac

AC_MSG_CHECKING(\$CC variable)
case "$CC" in
(*[[\ \	]]-*)
	AC_MSG_RESULT(broken)
	AC_MSG_WARN(your environment uses the CC variable to hold CFLAGS/CPPFLAGS options)
	# humor him...
	cf_prog=`echo "$CC" | sed -e 's/	/ /g' -e 's/[[ ]]* / /g' -e 's/[[ ]]*[[ ]]-[[^ ]].*//'`
	cf_flags=`echo "$CC" | sed -e "s%^$cf_prog%%"`
	CC="$cf_prog"
	for cf_arg in $cf_flags
	do
		case "x$cf_arg" in
		(x-[[IUDfgOW]]*)
			CF_ADD_CFLAGS($cf_arg)
			;;
		(*)
			CC="$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_CFG_DEFAULTS version: 16 updated: 2021/01/04 19:33:05
dnl ---------------
dnl Determine the default configuration into which we'll install ncurses.  This
dnl can be overridden by the user's command-line options.  There's two items to
dnl look for:
dnl	1. the prefix (e.g., /usr)
dnl	2. the header files (e.g., /usr/include/ncurses)
dnl We'll look for a previous installation of ncurses and use the same defaults.
dnl
dnl We don't use AC_PREFIX_DEFAULT, because it gets evaluated too soon, and
dnl we don't use AC_PREFIX_PROGRAM, because we cannot distinguish ncurses's
dnl programs from a vendor's.
AC_DEFUN([CF_CFG_DEFAULTS],
[AC_REQUIRE([AC_PROG_FGREP])dnl

AC_MSG_CHECKING(for prefix)
if test "x$prefix" = "xNONE" ; then
	case "$cf_cv_system_name" in
		# non-vendor systems don't have a conflict
	(openbsd*|freebsd*|mirbsd*|linux*|cygwin*|msys*|k*bsd*-gnu|mingw*)
		prefix=/usr
		;;
	(*)	prefix=$ac_default_prefix
		;;
	esac
fi
AC_MSG_RESULT($prefix)

if test "x$prefix" = "xNONE" ; then
AC_MSG_CHECKING(for default include-directory)
test -n "$verbose" && echo 1>&AC_FD_MSG
for cf_symbol in \
	"$includedir" \
	"$includedir/ncurses" \
	"$prefix/include" \
	"$prefix/include/ncurses" \
	/usr/local/include \
	/usr/local/include/ncurses \
	/usr/include \
	/usr/include/ncurses
do
	cf_dir=`eval echo "$cf_symbol"`
	if test -f "$cf_dir/curses.h" ; then
	if ( ${FGREP-fgrep} NCURSES_VERSION "$cf_dir/curses.h" >/dev/null 2>&1 ) ; then
		includedir="$cf_symbol"
		test -n "$verbose"  && echo $ECHO_N "	found " 1>&AC_FD_MSG
		break
	fi
	fi
	test -n "$verbose"  && echo "	tested $cf_dir" 1>&AC_FD_MSG
done
AC_MSG_RESULT($includedir)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_CACHE version: 13 updated: 2020/12/31 10:54:15
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_GNAT_VERSION version: 4 updated: 2021/01/01 13:31:04
dnl ---------------------
AC_DEFUN([CF_CHECK_GNAT_VERSION],
[
AC_REQUIRE([CF_GNAT_VERSION])
case "$cf_cv_gnat_version" in
(3.1[[1-9]]*|3.[[2-9]]*|[[4-9]].*|[[1-9]][[0-9]].[[0-9]]*|20[[0-9]][[0-9]])
	cf_cv_prog_gnat_correct=yes
	;;
(*)
	AC_MSG_WARN(Unsupported GNAT version $cf_cv_gnat_version. We require 3.11 or better. Disabling Ada95 binding.)
	cf_cv_prog_gnat_correct=no
	;;
esac
])
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_LIBSSP version: 1 updated: 2021/10/30 10:40:19
dnl ---------------
dnl Check if libssp is needed, e.g., to work around misconfigured libraries
dnl used in cross-compiling to MinGW.
AC_DEFUN([CF_CHECK_LIBSSP],[
AC_CACHE_CHECK(if ssp library is needed,cf_cv_need_libssp,[
AC_TRY_LINK([
#include <sys/types.h>
#include <dirent.h>
],[
       DIR *dp = opendir(".");
],cf_cv_need_libssp=no,[
	cf_save_LIBS="$LIBS"
	LIBS="$LIBS -lssp"
	AC_TRY_LINK([
#include <sys/types.h>
#include <dirent.h>
	],[
		   DIR *dp = opendir(".");
	],cf_cv_need_libssp=yes,
	  cf_cv_need_libssp=maybe)
	LIBS="$cf_save_LIBS"
])dnl
])

if test "x$cf_cv_need_libssp" = xyes
then
	CF_ADD_LIB(ssp)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CLANG_COMPILER version: 9 updated: 2023/02/18 17:41:25
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])"
	AC_TRY_COMPILE([],[
#ifdef __clang__
#else
#error __clang__ is not defined
#endif
],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
],[])
	ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
	AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
fi

CLANG_VERSION=none

if test "x$ifelse([$2],,CLANG_COMPILER,[$2])" = "xyes" ; then
	case "$CC" in
	(c[[1-9]][[0-9]]|*/c[[1-9]][[0-9]])
		AC_MSG_WARN(replacing broken compiler alias $CC)
		CFLAGS="$CFLAGS -std=`echo "$CC" | sed -e 's%.*/%%'`"
		CC=clang
		;;
	esac

	AC_MSG_CHECKING(version of $CC)
	CLANG_VERSION="`$CC --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(CLANG[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
	test -z "$CLANG_VERSION" && CLANG_VERSION=unknown
	AC_MSG_RESULT($CLANG_VERSION)

	for cf_clang_opt in \
		-Qunused-arguments \
		-Wno-error=implicit-function-declaration
	do
		AC_MSG_CHECKING(if option $cf_clang_opt works)
		cf_save_CFLAGS="$CFLAGS"
		CFLAGS="$CFLAGS $cf_clang_opt"
		AC_TRY_LINK([
			#include <stdio.h>],[
			printf("hello!\\n");],[
			cf_clang_optok=yes],[
			cf_clang_optok=no])
		AC_MSG_RESULT($cf_clang_optok)
		CFLAGS="$cf_save_CFLAGS"
		if test "$cf_clang_optok" = yes; then
			CF_VERBOSE(adding option $cf_clang_opt)
			CF_APPEND_TEXT(CFLAGS,$cf_clang_opt)
		fi
	done
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_CONST_X_STRING version: 8 updated: 2023/12/01 17:22:50
dnl -----------------
dnl The X11R4-X11R6 Xt specification uses an ambiguous String type for most
dnl character-strings.
dnl
dnl It is ambiguous because the specification accommodated the pre-ANSI
dnl compilers bundled by more than one vendor in lieu of providing a standard C
dnl compiler other than by costly add-ons.  Because of this, the specification
dnl did not take into account the use of const for telling the compiler that
dnl string literals would be in readonly memory.
dnl
dnl As a workaround, one could (starting with X11R5) define XTSTRINGDEFINES, to
dnl let the compiler decide how to represent Xt's strings which were #define'd.
dnl That does not solve the problem of using the block of Xt's strings which
dnl are compiled into the library (and is less efficient than one might want).
dnl
dnl Xt specification 7 introduces the _CONST_X_STRING symbol which is used both
dnl when compiling the library and compiling using the library, to tell the
dnl compiler that String is const.
AC_DEFUN([CF_CONST_X_STRING],
[
AC_REQUIRE([AC_PATH_XTRA])

CF_SAVE_XTRA_FLAGS([CF_CONST_X_STRING])

AC_TRY_COMPILE(
[
#include <stdlib.h>
#include <X11/Intrinsic.h>
],
[String foo = malloc(1); free((void*)foo)],[

AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
	AC_TRY_COMPILE(
		[
#undef  _CONST_X_STRING
#define _CONST_X_STRING	/* X11R7.8 (perhaps) */
#undef  XTSTRINGDEFINES	/* X11R5 and later */
#include <stdlib.h>
#include <X11/Intrinsic.h>
		],[String foo = malloc(1); *foo = 0],[
			cf_cv_const_x_string=no
		],[
			cf_cv_const_x_string=yes
		])
])

CF_RESTORE_XTRA_FLAGS([CF_CONST_X_STRING])

case "$cf_cv_const_x_string" in
(no)
	CF_APPEND_TEXT(CPPFLAGS,-DXTSTRINGDEFINES)
	;;
(*)
	CF_APPEND_TEXT(CPPFLAGS,-D_CONST_X_STRING)
	;;
esac

])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CONST_X_STRING version: 8 updated: 2023/12/01 17:22:50
dnl -----------------
dnl The X11R4-X11R6 Xt specification uses an ambiguous String type for most
dnl character-strings.
dnl
dnl It is ambiguous because the specification accommodated the pre-ANSI
dnl compilers bundled by more than one vendor in lieu of providing a standard C
dnl compiler other than by costly add-ons.  Because of this, the specification
dnl did not take into account the use of const for telling the compiler that
dnl string literals would be in readonly memory.
dnl
dnl As a workaround, one could (starting with X11R5) define XTSTRINGDEFINES, to
dnl let the compiler decide how to represent Xt's strings which were #define'd.
dnl That does not solve the problem of using the block of Xt's strings which
dnl are compiled into the library (and is less efficient than one might want).
dnl
dnl Xt specification 7 introduces the _CONST_X_STRING symbol which is used both
dnl when compiling the library and compiling using the library, to tell the
dnl compiler that String is const.
AC_DEFUN([CF_CONST_X_STRING],
[
AC_REQUIRE([AC_PATH_XTRA])

CF_SAVE_XTRA_FLAGS([CF_CONST_X_STRING])

AC_TRY_COMPILE(
[
#include <stdlib.h>
#include <X11/Intrinsic.h>
],
[String foo = malloc(1); free((void*)foo)],[

AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
	AC_TRY_COMPILE(
		[
#undef  _CONST_X_STRING
#define _CONST_X_STRING	/* X11R7.8 (perhaps) */
#undef  XTSTRINGDEFINES	/* X11R5 and later */
#include <stdlib.h>
#include <X11/Intrinsic.h>
		],[String foo = malloc(1); *foo = 0],[
			cf_cv_const_x_string=no
		],[
			cf_cv_const_x_string=yes
		])
])

CF_RESTORE_XTRA_FLAGS([CF_CONST_X_STRING])

case "$cf_cv_const_x_string" in
(no)
	CF_APPEND_TEXT(CPPFLAGS,-DXTSTRINGDEFINES)
	;;
(*)
	CF_APPEND_TEXT(CPPFLAGS,-D_CONST_X_STRING)
	;;
esac

])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CURSES_HEADER version: 6 updated: 2022/12/02 20:06:52
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(); endwin()],
	[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_DIRNAME version: 5 updated: 2020/12/31 20:19:42
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: 14 updated: 2021/09/04 06:35:04
dnl ---------------
dnl You can always use "make -n" to see the actual options, but it is 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_GNAT_PROJECTS version: 1 updated: 2014/06/01 11:34:00
dnl ------------------------
AC_DEFUN([CF_DISABLE_GNAT_PROJECTS],[
AC_MSG_CHECKING(if we want to use GNAT projects)
CF_ARG_DISABLE(gnat-projects,
	[  --disable-gnat-projects test: disable GNAT projects even if usable],
	[enable_gnat_projects=no],
	[enable_gnat_projects=yes])
AC_MSG_RESULT($enable_gnat_projects)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ENABLE_BROKEN_LINKER version: 2 updated: 2021/01/02 17:09:14
dnl -----------------------
dnl Some linkers cannot reference a data-only object.  Cygwin used to be one.
dnl This usually follows CF_LINK_DATAONLY, but is not required in case we need
dnl an unconditional feature.
AC_DEFUN([CF_ENABLE_BROKEN_LINKER],[

AC_MSG_CHECKING(if you want broken-linker support code)
AC_ARG_ENABLE(broken_linker,
	[  --enable-broken_linker  compile with broken-linker support code],
	[with_broken_linker=$enableval],
	[with_broken_linker=no])
AC_MSG_RESULT($with_broken_linker)

: "${BROKEN_LINKER:=0}"
if test "x$with_broken_linker" = xyes ; then
	AC_DEFINE(BROKEN_LINKER,1,[Define to 1 to work around linkers which cannot link data-only modules])
	BROKEN_LINKER=1
fi
AC_SUBST(BROKEN_LINKER)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ENABLE_WARNINGS version: 9 updated: 2021/01/05 19:40:50
dnl ------------------
dnl Configure-option to enable gcc warnings
dnl
dnl $1 = extra options to add, if supported
dnl $2 = option for checking attributes.  By default, this is done when
dnl      warnings are enabled.  For other values:
dnl      yes: always do this, e.g., to use in generated library-headers
dnl      no: never do this
AC_DEFUN([CF_ENABLE_WARNINGS],[
if test "$GCC" = yes || test "$GXX" = yes
then
CF_FIX_WARNINGS(CFLAGS)
CF_FIX_WARNINGS(CPPFLAGS)
CF_FIX_WARNINGS(LDFLAGS)
AC_MSG_CHECKING(if you want to turn on gcc warnings)
CF_ARG_ENABLE(warnings,
	[  --enable-warnings       test: turn on gcc compiler warnings],
	[enable_warnings=yes],
	[enable_warnings=no])
AC_MSG_RESULT($enable_warnings)
if test "$enable_warnings" = "yes"
then
	ifelse($2,,[CF_GCC_ATTRIBUTES])
	CF_GCC_WARNINGS($1)
fi
ifelse($2,yes,[CF_GCC_ATTRIBUTES])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIND_LIBRARY version: 11 updated: 2021/01/02 09:31:20
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: 22 updated: 2020/12/31 20:19:42
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"
			CF_APPEND_TEXT(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),[$5])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIXUP_ADAFLAGS version: 2 updated: 2015/04/17 21:13:04
dnl -----------------
dnl make ADAFLAGS consistent with CFLAGS
AC_DEFUN([CF_FIXUP_ADAFLAGS],[
	AC_MSG_CHECKING(optimization options for ADAFLAGS)
	case "$CFLAGS" in
	(*-g*)
		CF_ADD_ADAFLAGS(-g)
		;;
	esac
	case "$CFLAGS" in
	(*-O*)
		cf_O_flag=`echo "$CFLAGS" |sed -e 's/^.*-O/-O/' -e 's/[[ 	]].*//'`
		CF_ADD_ADAFLAGS($cf_O_flag)
		;;
	esac
	AC_MSG_RESULT($ADAFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIX_WARNINGS version: 4 updated: 2021/12/16 18:22:31
dnl ---------------
dnl Warning flags do not belong in CFLAGS, CPPFLAGS, etc.  Any of gcc's
dnl "-Werror" flags can interfere with configure-checks.  Those go into
dnl EXTRA_CFLAGS.
dnl
dnl $1 = variable name to repair
define([CF_FIX_WARNINGS],[
if test "$GCC" = yes || test "$GXX" = yes
then
	case [$]$1 in
	(*-Werror=*)
		cf_temp_flags=
		for cf_temp_scan in [$]$1
		do
			case "x$cf_temp_scan" in
			(x-Werror=format*)
				CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
				;;
			(x-Werror=*)
				CF_APPEND_TEXT(EXTRA_CFLAGS,$cf_temp_scan)
				;;
			(*)
				CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
				;;
			esac
		done
		if test "x[$]$1" != "x$cf_temp_flags"
		then
			CF_VERBOSE(repairing $1: [$]$1)
			$1="$cf_temp_flags"
			CF_VERBOSE(... fixed [$]$1)
			CF_VERBOSE(... extra $EXTRA_CFLAGS)
		fi
		;;
	esac
fi
AC_SUBST(EXTRA_CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FUNC_GETTIME version: 2 updated: 2023/02/25 08:45:56
dnl ---------------
dnl Check for gettimeofday or clock_gettime.  In 2023, the former is still more
dnl widely supported, but "deprecated" (2008), so we will use the latter if it
dnl is available, to reduce compiler warnings.
AC_DEFUN([CF_FUNC_GETTIME],[
AC_CACHE_CHECK(for clock_gettime,cf_cv_func_clock_gettime,[
		AC_TRY_LINK([#include <time.h>],
		[struct timespec ts;
		int rc = clock_gettime(CLOCK_REALTIME, &ts); (void) rc; (void)ts],
		[cf_cv_func_clock_gettime=yes],
		[cf_cv_func_clock_gettime=no])
])

if test "$cf_cv_func_clock_gettime" = yes
then
	AC_DEFINE(HAVE_CLOCK_GETTIME,1,[Define to 1 if we have clock_gettime function])
else
AC_CHECK_FUNC(gettimeofday,
	AC_DEFINE(HAVE_GETTIMEOFDAY,1,[Define to 1 if we have gettimeofday function]),[

AC_CHECK_LIB(bsd, gettimeofday,
	AC_DEFINE(HAVE_GETTIMEOFDAY,1,[Define to 1 if we have gettimeofday function])
	CF_ADD_LIB(bsd))])dnl CLIX: bzero, select, gettimeofday
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_ATTRIBUTES version: 24 updated: 2021/03/20 12:00:25
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],
[AC_REQUIRE([AC_PROG_FGREP])dnl
AC_REQUIRE([CF_C11_NORETURN])dnl

if test "$GCC" = yes || test "$GXX" = 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__ "${as_me:-configure}"
#include <stdio.h>
#include "confdefs.h"
#include "conftest.h"
#include "conftest.i"
#if	GCC_PRINTF
#define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
#else
#define GCC_PRINTFLIKE(fmt,var) /*nothing*/
#endif
#if	GCC_SCANF
#define GCC_SCANFLIKE(fmt,var)  __attribute__((format(scanf,fmt,var)))
#else
#define GCC_SCANFLIKE(fmt,var)  /*nothing*/
#endif
extern void wow(char *,...) GCC_SCANFLIKE(1,2);
extern GCC_NORETURN void oops(char *,...) GCC_PRINTFLIKE(1,2);
extern GCC_NORETURN void foo(void);
int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
EOF
	cf_printf_attribute=no
	cf_scanf_attribute=no
	for cf_attribute in scanf printf unused noreturn
	do
		CF_UPPER(cf_ATTRIBUTE,$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
	${FGREP-fgrep} define conftest.i >>confdefs.h
fi
rm -rf ./conftest*
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_VERSION version: 9 updated: 2023/03/05 14:30:13
dnl --------------
dnl Find version of gcc, and (because icc/clang pretend to be gcc without being
dnl compatible), attempt to determine if icc/clang is actually used.
AC_DEFUN([CF_GCC_VERSION],[
AC_REQUIRE([AC_PROG_CC])
GCC_VERSION=none
if test "$GCC" = yes ; then
	AC_MSG_CHECKING(version of $CC)
	GCC_VERSION="`${CC} --version 2>/dev/null | sed -e '2,$d' -e 's/^[[^(]]*([[^)]][[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
	test -z "$GCC_VERSION" && GCC_VERSION=unknown
	AC_MSG_RESULT($GCC_VERSION)
fi
CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_WARNINGS version: 41 updated: 2021/01/01 16:53:59
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	-Winline (usually not worthwhile)
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 $with_ext_const is "yes", add a check for -Wwrite-strings
dnl
AC_DEFUN([CF_GCC_WARNINGS],
[
AC_REQUIRE([CF_GCC_VERSION])
if test "x$have_x" = xyes; then CF_CONST_X_STRING fi
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="$EXTRA_CFLAGS -Wall"
	for cf_opt in \
		wd1419 \
		wd1683 \
		wd1684 \
		wd193 \
		wd593 \
		wd279 \
		wd810 \
		wd869 \
		wd981
	do
		CFLAGS="$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 && test "$GCC_VERSION" != "unknown"
then
	AC_CHECKING([for $CC warning options])
	cf_save_CFLAGS="$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 Wno-inline $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 "$cf_opt" in
			(Winline)
				case "$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_GNATPREP_OPT_T version: 1 updated: 2014/08/02 18:37:25
dnl -----------------
AC_DEFUN([CF_GNATPREP_OPT_T],[
AC_CACHE_CHECK(if GNATPREP supports -T option,cf_cv_gnatprep_opt_t,[
cf_cv_gnatprep_opt_t=no
gnatprep -T 2>/dev/null >/dev/null && cf_cv_gnatprep_opt_t=yes
])
test "$cf_cv_gnatprep_opt_t" = yes && GNATPREP_OPTS="-T $GNATPREP_OPTS"
AC_SUBST(GNATPREP_OPTS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_GENERICS version: 7 updated: 2021/01/01 13:31:04
dnl ----------------
AC_DEFUN([CF_GNAT_GENERICS],
[
AC_REQUIRE([CF_GNAT_VERSION])

AC_MSG_CHECKING(if GNAT supports generics)
case "$cf_cv_gnat_version" in
(3.1[[1-9]]*|3.[[2-9]]*|[[4-9]].*|[[1-9]][[0-9]].[[0-9]]*|20[[0-9]][[0-9]])
	cf_gnat_generics=yes
	;;
(*)
	cf_gnat_generics=no
	;;
esac
AC_MSG_RESULT($cf_gnat_generics)

if test "$cf_gnat_generics" = yes
then
	cf_compile_generics=generics
	cf_generic_objects="\${GENOBJS}"
else
	cf_compile_generics=
	cf_generic_objects=
fi

AC_SUBST(cf_compile_generics)
AC_SUBST(cf_generic_objects)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_PROJECTS version: 13 updated: 2021/01/02 17:09:14
dnl ----------------
dnl GNAT projects are configured with ".gpr" project files.
dnl GNAT libraries are a further development, using the project feature.
AC_DEFUN([CF_GNAT_PROJECTS],
[
AC_REQUIRE([CF_GNAT_VERSION])
AC_REQUIRE([CF_DISABLE_GNAT_PROJECTS])

cf_gnat_libraries=no
cf_gnat_projects=no

if test "$enable_gnat_projects" != no ; then
AC_MSG_CHECKING(if GNAT supports project files)
case "$cf_cv_gnat_version" in
(3.[[0-9]]*)
	;;
(*)
	case "$cf_cv_system_name" in
	(cygwin*|msys*)
		;;
	(*)
		rm -rf ./conftest* ./*~conftest*
		if mkdir conftest.src conftest.bin conftest.lib
		then
			cd conftest.src
			rm -rf ./conftest* ./*~conftest*
			cat >>library.gpr <<CF_EOF
project Library is
  Kind := External ("LIB_KIND");
  for Library_Name use "ConfTest";
  for Object_Dir use ".";
  for Library_ALI_Dir use External("LIBRARY_DIR");
  for Library_Version use External ("SONAME");
  for Library_Kind use Kind;
  for Library_Dir use External("BUILD_DIR");
  Source_Dir := External ("SOURCE_DIR");
  for Source_Dirs use (Source_Dir);
end Library;
CF_EOF
			cat >>confpackage.ads <<CF_EOF
package ConfPackage is
   procedure conftest;
end ConfPackage;
CF_EOF
			cat >>confpackage.adb <<CF_EOF
with Text_IO;
package body ConfPackage is
   procedure conftest is
   begin
      Text_IO.Put ("Hello World");
      Text_IO.New_Line;
   end conftest;
end ConfPackage;
CF_EOF
			if ( "$cf_ada_make" $ADAFLAGS \
					-Plibrary.gpr \
					-XBUILD_DIR="`cd ../conftest.bin;pwd`" \
					-XLIBRARY_DIR="`cd ../conftest.lib;pwd`" \
					-XSOURCE_DIR="`pwd`" \
					-XSONAME=libConfTest.so.1 \
					-XLIB_KIND=static 1>&AC_FD_CC 2>&1 ) ; then
				cf_gnat_projects=yes
			fi
			cd ..
		fi
		if test -f conftest.lib/confpackage.ali
		then
			cf_gnat_libraries=yes
		fi
		rm -rf ./conftest* ./*~conftest*
		;;
	esac
	;;
esac
AC_MSG_RESULT($cf_gnat_projects)
fi # enable_gnat_projects

if test "$cf_gnat_projects" = yes
then
	AC_MSG_CHECKING(if GNAT supports libraries)
	AC_MSG_RESULT($cf_gnat_libraries)
fi

USE_OLD_MAKERULES=""
USE_GNAT_PROJECTS="#"
USE_GNAT_MAKE_GPR="#"
USE_GNAT_GPRBUILD="#"

if test "$cf_gnat_projects" = yes
then
	USE_OLD_MAKERULES="#"
	USE_GNAT_PROJECTS=""
	if test "$cf_cv_VERSION_GPRBUILD" != no
	then
		USE_GNAT_GPRBUILD=""
	elif test "$cf_cv_VERSION_GNATMAKE" != no
	then
		USE_GNAT_MAKE_GPR=""
	else
		AC_MSG_WARN(use old makefile rules since tools are missing)
	fi
fi

if test "$cf_gnat_libraries" = yes
then
	USE_GNAT_LIBRARIES=""
else
	USE_GNAT_LIBRARIES="#"
fi

AC_SUBST(USE_OLD_MAKERULES)
AC_SUBST(USE_GNAT_PROJECTS)
AC_SUBST(USE_GNAT_LIBRARIES)
AC_SUBST(USE_GNAT_MAKE_GPR)
AC_SUBST(USE_GNAT_GPRBUILD)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_SIGINT version: 2 updated: 2021/01/01 13:31:04
dnl --------------
dnl Check if gnat supports SIGINT, and presumably tasking.  For the latter, it
dnl is noted that gnat may compile a tasking unit even for configurations which
dnl fail at runtime.
AC_DEFUN([CF_GNAT_SIGINT],[
AC_CACHE_CHECK(if GNAT supports SIGINT,cf_cv_gnat_sigint,[
CF_GNAT_TRY_LINK([with Ada.Interrupts.Names;

package ConfTest is

   pragma Warnings (Off);  --  the next pragma exists since 3.11p
   pragma Unreserve_All_Interrupts;
   pragma Warnings (On);

   protected Process is
      procedure Stop;
      function Continue return Boolean;
      pragma Attach_Handler (Stop, Ada.Interrupts.Names.SIGINT);
   private
      Done : Boolean := False;
   end Process;

end ConfTest;],
[package body ConfTest is
   protected body Process is
      procedure Stop is
      begin
         Done := True;
      end Stop;
      function Continue return Boolean is
      begin
         return not Done;
      end Continue;
   end Process;
end ConfTest;],
	[cf_cv_gnat_sigint=yes],
	[cf_cv_gnat_sigint=no])])

if test "$cf_cv_gnat_sigint" = yes ; then
	USE_GNAT_SIGINT=""
else
	USE_GNAT_SIGINT="#"
fi
AC_SUBST(USE_GNAT_SIGINT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_TRY_LINK version: 4 updated: 2021/01/01 13:31:04
dnl ----------------
dnl Verify that a test program compiles/links with GNAT.
dnl $cf_ada_make is set to the program that compiles/links
dnl $ADAFLAGS may be set to the GNAT flags.
dnl
dnl $1 is the text of the spec
dnl $2 is the text of the body
dnl $3 is the shell command to execute if successful
dnl $4 is the shell command to execute if not successful
AC_DEFUN([CF_GNAT_TRY_LINK],
[
rm -rf ./conftest* ./*~conftest*
cat >>conftest.ads <<CF_EOF
$1
CF_EOF
cat >>conftest.adb <<CF_EOF
$2
CF_EOF
if ( "$cf_ada_make" $ADAFLAGS conftest 1>&AC_FD_CC 2>&1 ) ; then
ifelse($3,,      :,[      $3])
ifelse($4,,,[else
   $4])
fi
rm -rf ./conftest* ./*~conftest*
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_TRY_RUN version: 6 updated: 2021/01/01 13:31:04
dnl ---------------
dnl Verify that a test program compiles and runs with GNAT
dnl $cf_ada_make is set to the program that compiles/links
dnl $ADAFLAGS may be set to the GNAT flags.
dnl
dnl $1 is the text of the spec
dnl $2 is the text of the body
dnl $3 is the shell command to execute if successful
dnl $4 is the shell command to execute if not successful
AC_DEFUN([CF_GNAT_TRY_RUN],
[
rm -rf ./conftest* ./*~conftest*
cat >>conftest.ads <<CF_EOF
$1
CF_EOF
cat >>conftest.adb <<CF_EOF
$2
CF_EOF
if ( "$cf_ada_make" $ADAFLAGS conftest 1>&AC_FD_CC 2>&1 ) ; then
   if ( ./conftest 1>&AC_FD_CC 2>&1 ) ; then
ifelse($3,,      :,[      $3])
ifelse($4,,,[   else
      $4])
   fi
ifelse($4,,,[else
   $4])
fi
rm -rf ./conftest* ./*~conftest*
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNAT_VERSION version: 22 updated: 2019/12/31 08:53:54
dnl ---------------
dnl $1 = cache variable to update
dnl $2 = program name
dnl Verify version of GNAT or related tool
AC_DEFUN([CF_GNAT_VERSION],
[
AC_CACHE_CHECK(for ifelse($2,,gnat,$2) version, cf_cv_gnat_version,[
cf_cv_gnat_version=`ifelse($2,,${cf_ada_make:-gnatmake},$2) --version 2>&1 | \
	grep '[[0-9]].[[0-9]][[0-9]]*' |\
	sed -e '2,$d' -e 's/[[^0-9 \.]]//g' -e 's/^[[ ]]*//' -e 's/ .*//'`
])
test -z "$cf_cv_gnat_version" && cf_cv_gnat_version=no
ifelse($1,,,[eval $1=$cf_cv_gnat_version; unset cf_cv_gnat_version])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNU_SOURCE version: 10 updated: 2018/12/10 20:09:41
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...
dnl
dnl Parameters:
dnl	$1 is the nominal value for _XOPEN_SOURCE
AC_DEFUN([CF_GNU_SOURCE],
[
cf_gnu_xopen_source=ifelse($1,,500,$1)

AC_CACHE_CHECK(if this is the GNU C library,cf_cv_gnu_library,[
AC_TRY_COMPILE([#include <sys/types.h>],[
	#if __GLIBC__ > 0 && __GLIBC_MINOR__ >= 0
		return 0;
	#elif __NEWLIB__ > 0 && __NEWLIB_MINOR__ >= 0
		return 0;
	#else
	#	error not GNU C library
	#endif],
	[cf_cv_gnu_library=yes],
	[cf_cv_gnu_library=no])
])

if test x$cf_cv_gnu_library = xyes; then

	# With glibc 2.19 (13 years after this check was begun), _DEFAULT_SOURCE
	# was changed to help a little.  newlib incorporated the change about 4
	# years later.
	AC_CACHE_CHECK(if _DEFAULT_SOURCE can be used as a basis,cf_cv_gnu_library_219,[
		cf_save="$CPPFLAGS"
		CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
		AC_TRY_COMPILE([#include <sys/types.h>],[
			#if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) || (__GLIBC__ > 2)
				return 0;
			#elif (__NEWLIB__ == 2 && __NEWLIB_MINOR__ >= 4) || (__GLIBC__ > 3)
				return 0;
			#else
			#	error GNU C library __GLIBC__.__GLIBC_MINOR__ is too old
			#endif],
			[cf_cv_gnu_library_219=yes],
			[cf_cv_gnu_library_219=no])
		CPPFLAGS="$cf_save"
	])

	if test "x$cf_cv_gnu_library_219" = xyes; then
		cf_save="$CPPFLAGS"
		AC_CACHE_CHECK(if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE,cf_cv_gnu_dftsrc_219,[
			CF_ADD_CFLAGS(-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=$cf_gnu_xopen_source)
			AC_TRY_COMPILE([
				#include <limits.h>
				#include <sys/types.h>
				],[
				#if (_XOPEN_SOURCE >= $cf_gnu_xopen_source) && (MB_LEN_MAX > 1)
					return 0;
				#else
				#	error GNU C library is too old
				#endif],
				[cf_cv_gnu_dftsrc_219=yes],
				[cf_cv_gnu_dftsrc_219=no])
			])
		test "x$cf_cv_gnu_dftsrc_219" = "xyes" || CPPFLAGS="$cf_save"
	else
		cf_cv_gnu_dftsrc_219=maybe
	fi

	if test "x$cf_cv_gnu_dftsrc_219" != xyes; then

		AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
		AC_TRY_COMPILE([#include <sys/types.h>],[
			#ifndef _XOPEN_SOURCE
			#error	expected _XOPEN_SOURCE to be defined
			#endif],
			[cf_cv_gnu_source=no],
			[cf_save="$CPPFLAGS"
			 CF_ADD_CFLAGS(-D_GNU_SOURCE)
			 AC_TRY_COMPILE([#include <sys/types.h>],[
				#ifdef _XOPEN_SOURCE
				#error	expected _XOPEN_SOURCE to be undefined
				#endif],
				[cf_cv_gnu_source=no],
				[cf_cv_gnu_source=yes])
			CPPFLAGS="$cf_save"
			])
		])

		if test "$cf_cv_gnu_source" = yes
		then
		AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
			CF_APPEND_TEXT(CPPFLAGS,-D_GNU_SOURCE)
			AC_TRY_COMPILE([#include <sys/types.h>],[
				#ifdef _DEFAULT_SOURCE
				#error	expected _DEFAULT_SOURCE to be undefined
				#endif],
				[cf_cv_default_source=no],
				[cf_cv_default_source=yes])
			])
			if test "$cf_cv_default_source" = yes
			then
				CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
			fi
		fi
	fi

fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_HEADER_PATH version: 15 updated: 2021/01/01 13:31:04
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_HELP_MESSAGE version: 4 updated: 2019/12/31 08:53:54
dnl ---------------
dnl Insert text into the help-message, for readability, from AC_ARG_WITH.
AC_DEFUN([CF_HELP_MESSAGE],
[CF_ACVERSION_CHECK(2.53,[],[
AC_DIVERT_HELP($1)])dnl
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INCLUDE_DIRS version: 10 updated: 2014/09/19 20:58:42
dnl ---------------
dnl Construct the list of include-options according to whether we're building
dnl in the source directory or using '--srcdir=DIR' option.
AC_DEFUN([CF_INCLUDE_DIRS],
[
if test "$srcdir" != "."; then
	CPPFLAGS="-I\${srcdir}/../include $CPPFLAGS"
fi
CPPFLAGS="-I../include $CPPFLAGS"
if test "$srcdir" != "."; then
	CPPFLAGS="-I\${srcdir} $CPPFLAGS"
fi
CPPFLAGS="-I. $CPPFLAGS"
AC_SUBST(CPPFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INSTALL_OPTS version: 3 updated: 2023/06/03 15:17:30
dnl ---------------
dnl prompt for/fill-in useful install-program options
AC_DEFUN([CF_INSTALL_OPTS],
[
CF_INSTALL_OPT_S
CF_INSTALL_OPT_P
CF_INSTALL_OPT_O
CF_INSTALL_OPT_STRIP_PROG
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INSTALL_OPT_O version: 3 updated: 2020/12/31 20:19:42
dnl ----------------
dnl Almost all "install" programs default to the current user's ownership.
dnl Almost - MINIX is an exception.
AC_DEFUN([CF_INSTALL_OPT_O],
[
AC_MSG_CHECKING(if install needs to be told about ownership)
case `$ac_config_guess` in
(*minix)
	with_install_o=yes
	;;
(*)
	with_install_o=no
	;;
esac

AC_MSG_RESULT($with_install_o)
if test "x$with_install_o" = xyes
then
	INSTALL_OPT_O="`id root|sed -e 's/uid=[[0-9]]*(/ -o /' -e 's/gid=[[0-9]]*(/ -g /' -e 's/ [[^=[:space:]]][[^=[:space:]]]*=.*/ /' -e 's/)//g'`"
else
	INSTALL_OPT_O=
fi

AC_SUBST(INSTALL_OPT_O)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INSTALL_OPT_P version: 3 updated: 2021/01/01 13:31:04
dnl ----------------
dnl Some install-programs accept a "-p" option to preserve file modification
dnl timestamps.  That can be useful as an install option, as well as a way to
dnl avoid the need for ranlib after copying a static archive.
AC_DEFUN([CF_INSTALL_OPT_P],
[
: "${INSTALL:=install}"
AC_CACHE_CHECK(if install accepts -p option, cf_cv_install_p,[
	rm -rf ./conftest*
	date >conftest.in
	mkdir conftest.out
	sleep 3
	if $INSTALL -p conftest.in conftest.out 2>/dev/null
	then
		if test -f conftest.out/conftest.in
		then
			test conftest.in -nt conftest.out/conftest.in 2>conftest.err && \
			test conftest.out/conftest.in -nt conftest.in 2>conftest.err
			if test -s conftest.err
			then
				cf_cv_install_p=no
			else
				cf_cv_install_p=yes
			fi
		else
			cf_cv_install_p=no
		fi
	else
		cf_cv_install_p=no
	fi
	rm -rf ./conftest*
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INSTALL_OPT_S version: 3 updated: 2021/01/05 19:23:48
dnl ----------------
dnl By default, we should strip executables which are installed, but leave the
dnl ability to suppress that for unit-testing.
AC_DEFUN([CF_INSTALL_OPT_S],
[
AC_MSG_CHECKING(if you want to install stripped executables)
CF_ARG_DISABLE(stripping,
	[  --disable-stripping     do not strip (debug info) installed executables],
	[enable_stripping=no],
	[enable_stripping=yes])
AC_MSG_RESULT($enable_stripping)

if test "$enable_stripping" = yes
then
	INSTALL_OPT_S="-s"
else
	INSTALL_OPT_S=
fi
AC_SUBST(INSTALL_OPT_S)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INSTALL_OPT_STRIP_PROG version: 1 updated: 2023/06/03 15:17:30
dnl -------------------------
dnl Provide an option for overriding the strip program used in install "-s"
dnl
dnl coreutils install provides a --strip-program option
dnl FreeBSD uses STRIPBIN environment variable, while NetBSD and OpenBSD use
dnl STRIP environment variable.  Other versions of install do not support this.
AC_DEFUN([CF_INSTALL_OPT_STRIP_PROG],
[
AC_REQUIRE([CF_INSTALL_OPT_S])
if test -n "$INSTALL_OPT_S"
then
	AC_MSG_CHECKING(if you want to specify strip-program)
	AC_ARG_WITH(strip-program,
		[  --with-strip-program=XX specify program to use when stripping in install],
		[with_strip_program=$withval],
		[with_strip_program=no])
	AC_MSG_RESULT($with_strip_program)
	if test "$with_strip_program" != no
	then
		AC_MSG_CHECKING(if strip-program is supported with this installer)
		cf_install_program=`echo "$INSTALL" | sed -e 's%[[ ]]*[[ ]]-.%%'`
		check_install_strip=no
		if test -f "$cf_install_program"
		then
			check_install_version=`"$cf_install_program" --version 2>/dev/null | head -n 1 | grep coreutils`
			if test -n "$check_install_version"
			then
				check_install_strip="option"
			else
				for check_strip_variable in STRIPBIN STRIP
				do
					if strings "$cf_install_program" | grep "^$check_strip_variable[$]" >/dev/null
					then
						check_install_strip="environ"
						break
					fi
				done
			fi
		fi
		AC_MSG_RESULT($check_install_strip)
		case "$check_install_strip" in
		(no)
			AC_MSG_WARN($cf_install_program does not support strip program option)
			with_strip_program=no
			;;
		(environ)
			cat >install.tmp <<-CF_EOF
			#! $SHELL
			STRIPBIN="$with_strip_program" \\
			STRIP="$with_strip_program" \\
			$INSTALL "[$]@"
			CF_EOF
			INSTALL="`pwd`/install.tmp"
			chmod +x "$INSTALL"
			CF_VERBOSE(created $INSTALL)
			;;
		(option)
			INSTALL_OPT_S="$INSTALL_OPT_S --strip-program=\"$with_strip_program\""
			;;
		esac
	fi
fi
AC_SUBST(INSTALL_OPT_S)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INTEL_COMPILER version: 9 updated: 2023/02/18 17:41:25
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
#error __INTEL_COMPILER is not defined
#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,[$2]))
		;;
	esac
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LARGEFILE version: 13 updated: 2023/12/03 19:09:59
dnl ------------
dnl Add checks for large file support.
AC_DEFUN([CF_LARGEFILE],[
ifdef([AC_FUNC_FSEEKO],[
	AC_SYS_LARGEFILE
	if test "$enable_largefile" != no ; then
	AC_FUNC_FSEEKO

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

	AC_CACHE_CHECK(whether to use struct dirent64, cf_cv_struct_dirent64,[
		AC_TRY_COMPILE([
#pragma GCC diagnostic error "-Wincompatible-pointer-types"
#include <sys/types.h>
#include <dirent.h>

#ifndef __REDIRECT
/* if transitional largefile support is setup, this is true */
extern struct dirent64 * readdir(DIR *);
#endif
		],[
		DIR *dp = opendir(".");
		struct dirent64 *x = readdir(dp);
		struct dirent *y = readdir(dp);
		int z = x - y;
		(void)z;
		],
		[cf_cv_struct_dirent64=yes],
		[cf_cv_struct_dirent64=no])
	])
	test "$cf_cv_struct_dirent64" = yes && AC_DEFINE(HAVE_STRUCT_DIRENT64,1,[Define to 1 if we have struct dirent64])
	fi
])
])
dnl ---------------------------------------------------------------------------
dnl CF_LD_RPATH_OPT version: 9 updated: 2021/01/01 13:31:04
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=
if test "x$cf_cv_enable_rpath" != xno
then
	AC_MSG_CHECKING(for an rpath option)
	case "$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
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIBRARY_PATH version: 11 updated: 2021/01/01 13:31:04
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_LIB_PREFIX version: 14 updated: 2021/01/01 13:31:04
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
		;;
	(*-msvc*)
		LIB_PREFIX=''
		;;
	(*)	LIB_PREFIX='lib'
		;;
	esac
ifelse($1,,,[$1=$LIB_PREFIX])
	AC_SUBST(LIB_PREFIX)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIB_SUFFIX version: 28 updated: 2021/01/01 16:53:59
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'
		$3=[$]$2
		;;
	(Xdebug)
		case "$cf_cv_system_name" in
		(*-msvc*)
			$2='_g.lib'
			;;
		(*)
			$2='_g.a'
			;;
		esac
		$3=[$]$2
		;;
	(Xprofile)
		case "$cf_cv_system_name" in
		(*-msvc*)
			$2='_p.lib'
			;;
		(*)
			$2='_p.a'
			;;
		esac
		$3=[$]$2
		;;
	(Xshared)
		case "$cf_cv_system_name" in
		(aix[[5-7]]*)
			$2='.so'
			$3=[$]$2
			;;
		(*-msvc*)
			$2='.dll'
			$3='.dll.lib'
			;;
		(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'
			$3=[$]$2
			;;
		esac
		;;
	(*)
		case "$target" in
		(*-msvc*)
			$2='.lib'
			;;
		(*)
			$2='.a'
			;;
		esac
		$3=[$]$2
		;;
	esac
	if test -n "${LIB_SUFFIX}${EXTRA_SUFFIX}"
	then
		$2="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$2}"
		$3="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$3}"
	fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LIB_TYPE version: 5 updated: 2015/04/17 21:13:04
dnl -----------
dnl Compute the string to append to -library from the given model name
dnl $1 = model name
dnl $2 = variable to set
dnl The variable $LIB_SUFFIX, if set, prepends the variable to set.
AC_DEFUN([CF_LIB_TYPE],
[
	case $1 in
	(libtool) $2=''   ;;
	(normal)  $2=''   ;;
	(debug)   $2='_g' ;;
	(profile) $2='_p' ;;
	(shared)  $2=''   ;;
	esac
	test -n "$LIB_SUFFIX" && $2="${LIB_SUFFIX}[$]{$2}"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_LINK_DATAONLY version: 15 updated: 2023/12/03 10:03:10
dnl ----------------
dnl Some systems have a non-ANSI linker that doesn't pull in modules that have
dnl only data (i.e., no functions), for example NeXT.  On those systems we'll
dnl have to provide wrappers for global tables to ensure they're linked
dnl properly.
AC_DEFUN([CF_LINK_DATAONLY],
[
AC_MSG_CHECKING([if data-only library module links])
AC_CACHE_VAL(cf_cv_link_dataonly,[
	rm -f conftest.a
	cat >conftest.$ac_ext <<EOF
#line __oline__ "configure"
int	testdata[[3]] = { 123, 456, 789 };
EOF
	if AC_TRY_EVAL(ac_compile) ; then
		mv conftest.o data.o && \
		( $AR $ARFLAGS conftest.a data.o ) 2>&AC_FD_CC 1>/dev/null
	fi
	rm -f conftest.$ac_ext data.o
	cat >conftest.$ac_ext <<EOF
#line __oline__ "configure"
extern int testfunc(void);
#if defined(NeXT)
int	testfunc(void)
{
	${cf_cv_main_return:-return}(1);	/* I'm told this linker is broken */
}
#else
extern int testdata[[3]];
int	testfunc(void)
{
	return testdata[[0]] == 123
	   &&  testdata[[1]] == 456
	   &&  testdata[[2]] == 789;
}
#endif
EOF
	if AC_TRY_EVAL(ac_compile); then
		mv conftest.o func.o && \
		( $AR $ARFLAGS conftest.a func.o ) 2>&AC_FD_CC 1>/dev/null
	fi
	rm -f conftest.$ac_ext func.o
	( eval $RANLIB conftest.a ) 2>&AC_FD_CC >/dev/null
	cf_saveLIBS="$LIBS"
	LIBS="conftest.a $LIBS"
	AC_TRY_RUN([
	extern int testfunc(void);
	int main(void)
	{
		${cf_cv_main_return:-return} (!testfunc());
	}
	],
	[cf_cv_link_dataonly=yes],
	[cf_cv_link_dataonly=no],
	[cf_cv_link_dataonly=unknown])
	LIBS="$cf_saveLIBS"
	])
AC_MSG_RESULT($cf_cv_link_dataonly)

if test "$cf_cv_link_dataonly" = no ; then
	AC_DEFINE(BROKEN_LINKER,1,[if data-only library module does not link])
	BROKEN_LINKER=1
fi
AC_SUBST(BROKEN_LINKER)

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_MAKEFLAGS version: 21 updated: 2021/09/04 06:47:34
dnl ------------
dnl Some 'make' programs support ${MAKEFLAGS}, some ${MFLAGS}, to pass 'make'
dnl options to lower-levels.  It is 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_REQUIRE([AC_PROG_FGREP])dnl

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 | ${FGREP-fgrep} -v "ing directory" | sed -e 's,[[ 	]]*$,,'`
		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
			;;
		(.-)
			;;
		(*)
			CF_MSG_LOG(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_PHONY version: 3 updated: 2021/01/08 16:08:21
dnl -------------
dnl Check if the make-program handles a ".PHONY" target, e.g,. a target which
dnl acts as a placeholder.
dnl
dnl The ".PHONY" feature was proposed in 2011 here
dnl     https://www.austingroupbugs.net/view.php?id=523
dnl and is scheduled for release in P1003.1 Issue 8 (late 2022).
dnl
dnl This is not supported by SVr4 make (or SunOS 4, 4.3SD, etc), but works with
dnl a few others (i.e., GNU make and the non-POSIX "BSD" make):
dnl
dnl + This is a GNU make feature (since April 1988, but in turn from binutils,
dnl   date unspecified).
dnl
dnl + It was adopted in NetBSD make in June 1995.
dnl
dnl + The other BSD make programs are derived from the NetBSD make (and for
dnl   that reason are not actually different "implementations").
dnl
dnl + Some features of NetBSD make were actually adapted from pmake, which
dnl   began as a modified GNU make starting in 1993.
dnl
dnl + Version 3.8 of the dmake program in January 1992 also implemented this
dnl   GNU make extension, but is less well known than the BSD make.
AC_DEFUN([CF_MAKE_PHONY],[
AC_CACHE_CHECK(for \".PHONY\" make-support, cf_cv_make_PHONY,[
	rm -rf conftest*
	(
		mkdir conftest || exit 1
		cd conftest
		cat >makefile <<'CF_EOF'
.PHONY: always
DATA=0
always:	always.out
	@echo "** making [$]@ [$](DATA)"
once: once.out
	@echo "** making [$]@ [$](DATA)"
always.out:
	@echo "** making [$]@ [$](DATA)"
	echo [$](DATA) > [$]@
once.out:
	@echo "** making [$]@ [$](DATA)"
	echo [$](DATA) > [$]@
CF_EOF
		for cf_data in 1 2 3
		do
			${MAKE:-make} always DATA=$cf_data
			${MAKE:-make} once   DATA=$cf_data
			${MAKE:-make} -t always once
			if test -f always ; then
				echo "no (case 1)" > ../conftest.tmp
			elif test ! -f always.out ; then
				echo "no (case 2)" > ../conftest.tmp
			elif test ! -f once.out ; then
				echo "no (case 3)" > ../conftest.tmp
			elif ! cmp -s always.out once.out ; then
				echo "no (case 4)" > ../conftest.tmp
				diff always.out once.out
			else
				cf_check="`cat always.out`"
				if test "x$cf_check" != "x$cf_data" ; then
					echo "no (case 5)" > ../conftest.tmp
				else
					echo yes > ../conftest.tmp
					rm -f ./*.out
					continue
				fi
			fi
			break
		done
	) >&AC_FD_CC 2>&1
	cf_cv_make_PHONY="`cat conftest.tmp`"
	rm -rf conftest*
])
MAKE_NO_PHONY="#"
MAKE_PHONY="#"
test "x$cf_cv_make_PHONY" = xyes && MAKE_PHONY=
test "x$cf_cv_make_PHONY" != xyes && MAKE_NO_PHONY=
AC_SUBST(MAKE_NO_PHONY)
AC_SUBST(MAKE_PHONY)
])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: 9 updated: 2021/01/01 16:53:59
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*|darwin*)
		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_MKSTEMP version: 13 updated: 2023/12/01 17:22:50
dnl ----------
dnl Check for a working mkstemp.  This creates two files, checks that they are
dnl successfully created and distinct (AmigaOS apparently fails on the last).
AC_DEFUN([CF_MKSTEMP],[
AC_CHECK_HEADERS( \
unistd.h \
)
AC_CACHE_CHECK(for working mkstemp, cf_cv_func_mkstemp,[
rm -rf ./conftest*
AC_TRY_RUN([
$ac_includes_default

int main(void)
{
	static char tmpl[] = "conftestXXXXXX";
	char name[2][80];
	int n;
	int result = 0;
	int fd;
	struct stat sb;

	umask(077);
	for (n = 0; n < 2; ++n) {
		strcpy(name[n], tmpl);
		if ((fd = mkstemp(name[n])) >= 0) {
			if (!strcmp(name[n], tmpl)
			 || stat(name[n], &sb) != 0
			 || (sb.st_mode & S_IFMT) != S_IFREG
			 || (sb.st_mode & 077) != 0) {
				result = 1;
			}
			close(fd);
		}
	}
	if (result == 0
	 && !strcmp(name[0], name[1]))
		result = 1;
	${cf_cv_main_return:-return}(result);
}
],[cf_cv_func_mkstemp=yes
],[cf_cv_func_mkstemp=no
],[cf_cv_func_mkstemp=maybe])
])
if test "x$cf_cv_func_mkstemp" = xmaybe ; then
	AC_CHECK_FUNC(mkstemp)
fi
if test "x$cf_cv_func_mkstemp" = xyes || test "x$ac_cv_func_mkstemp" = xyes ; then
	AC_DEFINE(HAVE_MKSTEMP,1,[Define to 1 if mkstemp() is available and working.])
fi
])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_ADDON version: 6 updated: 2021/01/04 19:33:05
dnl ----------------
dnl Configure an ncurses add-on, built outside the ncurses tree.
AC_DEFUN([CF_NCURSES_ADDON],[
AC_REQUIRE([CF_NCURSES_CONFIG])

AC_PROVIDE([CF_SUBST_NCURSES_VERSION])

AC_MSG_CHECKING(if you want wide-character code)
AC_ARG_ENABLE(widec,
	[  --enable-widec          compile with wide-char/UTF-8 code],
	[with_widec=$enableval],
	[with_widec=no])
AC_MSG_RESULT($with_widec)
if test "$with_widec" = yes ; then
	CF_UTF8_LIB
	CF_NCURSES_CONFIG(ncursesw)
else
	CF_NCURSES_CONFIG(ncurses)
fi

if test "$NCURSES_CONFIG_PKG" != none ; then
	cf_version=`$PKG_CONFIG --modversion $NCURSES_CONFIG_PKG 2>/dev/null`

	NCURSES_MAJOR=`echo "$cf_version" | sed -e 's/\..*//'`
	NCURSES_MINOR=`echo "$cf_version" | sed -e 's/^[[0-9]][[0-9]]*\.//' -e 's/\..*//'`
	NCURSES_PATCH=`echo "$cf_version" | sed -e 's/^[[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\.//'`

	cf_cv_abi_version=`$PKG_CONFIG --variable=abi_version $NCURSES_CONFIG_PKG 2>/dev/null`
	if test -z "$cf_cv_abi_version"
	then
		cf_cv_abi_version=`$PKG_CONFIG --variable=major_version $NCURSES_CONFIG_PKG 2>/dev/null`
	fi

elif test "$NCURSES_CONFIG" != none ; then

	cf_version=`$NCURSES_CONFIG --version 2>/dev/null`

	NCURSES_MAJOR=`echo "$cf_version" | sed -e 's/\..*//'`
	NCURSES_MINOR=`echo "$cf_version" | sed -e 's/^[[0-9]][[0-9]]*\.//' -e 's/\..*//'`
	NCURSES_PATCH=`echo "$cf_version" | sed -e 's/^[[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\.//'`

	# ABI version is not available from headers
	cf_cv_abi_version=`$NCURSES_CONFIG --abi-version 2>/dev/null`

else

	for cf_name in MAJOR MINOR PATCH
	do
	cat >conftest.$ac_ext <<CF_EOF
	#include <${cf_cv_ncurses_header:-curses.h}>
	AUTOCONF_$cf_name NCURSES_VERSION_$cf_name
CF_EOF
		cf_try="$ac_cpp conftest.$ac_ext 2>&5 | fgrep AUTOCONF_$cf_name >conftest.out"
		AC_TRY_EVAL(cf_try)
		if test -f conftest.out ; then
			cf_result=`sed -e "s/^.*AUTOCONF_${cf_name}[[ 	]][[ 	]]*//" conftest.out`
			eval NCURSES_$cf_name=\"$cf_result\"
			# cat conftest.$ac_ext
			# cat conftest.out
		fi
	done

	cf_cv_abi_version=${NCURSES_MAJOR}

fi

cf_cv_rel_version=${NCURSES_MAJOR}.${NCURSES_MINOR}

dnl Show the computed version, for logging
cf_cv_timestamp=`date`

AC_MSG_RESULT(Configuring NCURSES $cf_cv_rel_version ABI $cf_cv_abi_version ($cf_cv_timestamp))

dnl We need these values in the generated headers
AC_SUBST(NCURSES_MAJOR)
AC_SUBST(NCURSES_MINOR)
AC_SUBST(NCURSES_PATCH)

dnl We need these values in the generated makefiles
AC_SUBST(cf_cv_rel_version)
AC_SUBST(cf_cv_abi_version)

dnl FIXME - not needed for Ada95
AC_SUBST(cf_cv_builtin_bool)
AC_SUBST(cf_cv_header_stdbool_h)
AC_SUBST(cf_cv_type_of_bool)dnl

])
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CC_CHECK version: 6 updated: 2023/02/18 17:47:58
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
	#error WACS_BSSB is not defined
#endif
])[
printf("%s\\n", NCURSES_VERSION);
#else
#ifdef __NCURSES_H
printf("old\\n");
#else
	#error __NCURSES_H is not defined
#endif
#endif
	]
	,[$1=$2]
	,[$1=no])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_CONFIG version: 28 updated: 2021/08/28 15:20:37
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_CFLAGS="$CFLAGS"
		cf_save_CPPFLAGS="$CPPFLAGS"
		cf_save_LIBS="$LIBS"

		cf_pkg_cflags="`$PKG_CONFIG --cflags $cf_ncuconfig_root`"
		cf_pkg_libs="`$PKG_CONFIG --libs $cf_ncuconfig_root`"

		# while -W for passing linker flags is prevalent, it is not "standard".
		# At least one wrapper for c89/c99 (in Apple's xcode) has its own
		# incompatible _and_ non-standard -W option which gives an error.  Work
		# around that pitfall.
		case "x${CC}@@${cf_pkg_libs}@${cf_pkg_cflags}" in
		(x*c[[89]]9@@*-W*)
			CF_ADD_CFLAGS($cf_pkg_cflags)
			CF_ADD_LIBS($cf_pkg_libs)

			AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
				[initscr(); mousemask(0,0); tigetstr((char *)0);],
				[AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
					int main(void)
					{ const char *xx = curses_version(); return (xx == 0); }],
					[cf_test_ncuconfig=yes],
					[cf_test_ncuconfig=no],
					[cf_test_ncuconfig=maybe])],
				[cf_test_ncuconfig=no])

			CFLAGS="$cf_save_CFLAGS"
			CPPFLAGS="$cf_save_CPPFLAGS"
			LIBS="$cf_save_LIBS"

			if test "x$cf_test_ncuconfig" != xyes; then
				cf_temp=`echo "x$cf_pkg_cflags" | sed -e s/^x// -e 's/-W[[^ 	]]*//g'`
				cf_pkg_cflags="$cf_temp"
				cf_temp=`echo "x$cf_pkg_libs" | sed -e s/^x// -e 's/-W[[^ 	]]*//g'`
				cf_pkg_libs="$cf_temp"
			fi
			;;
		esac

		CF_APPEND_CFLAGS($cf_pkg_cflags)
		CF_ADD_LIBS($cf_pkg_libs)

		AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
			[initscr(); mousemask(0,0); tigetstr((char *)0);],
			[AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
				int main(void)
				{ const 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
			CF_TERM_HEADER
		fi

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

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

	CF_ACVERSION_CHECK(2.52,
		[AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
		[AC_PATH_PROGS(NCURSES_CONFIG,  ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)])

	if test "$NCURSES_CONFIG" != none ; then

		CF_APPEND_CFLAGS(`$NCURSES_CONFIG --cflags`)
		CF_ADD_LIBS(`$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: 22 updated: 2021/01/02 09:31:20
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: 7 updated: 2021/01/04 19:33:05
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 $ECHO_N "	... found $ECHO_C" 1>&AC_FD_MSG
				break
			fi
			test -n "$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: 21 updated: 2021/09/04 06:37:12
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 "$host_os" in
(freebsd*)
	# This is only necessary if you are linking against an obsolete
	# version of ncurses (but it should do no harm, since it is static).
	if test "$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 <${cf_cv_ncurses_header:-curses.h}>],
		[initscr(); mousemask(0,0); tigetstr((char *)0);],
		[AC_MSG_RESULT(yes)],
		[AC_MSG_RESULT(no)
		 LIBS="$cf_ncurses_SAVE"])
fi

CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_nculib_root)
AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_NCURSES_VERSION version: 18 updated: 2024/01/07 06:34:16
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([
$ac_includes_default

#include <${cf_cv_ncurses_header:-curses.h}>

int main(void)
{
	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
	#error expected ncurses header to define __NCURSES_H
# 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=`sed -e 's%^Autoconf %%' -e 's%^[[^"]]*"%%' -e 's%".*%%' conftest.out`
		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_OBJ_SUBDIR version: 8 updated: 2021/01/01 13:31:04
dnl -------------
dnl Compute the object-directory name from the given model name
AC_DEFUN([CF_OBJ_SUBDIR],
[
	case $1 in
	(libtool) $2='obj_lo'  ;;
	(normal)  $2='objects' ;;
	(debug)   $2='obj_g' ;;
	(profile) $2='obj_p' ;;
	(shared)
		case "$cf_cv_system_name" in
		(cygwin|msys)
			$2='objects' ;;
		(*)
			$2='obj_s' ;;
		esac
	esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PATHSEP version: 8 updated: 2021/01/01 13:31:04
dnl ----------
dnl Provide a value for the $PATH and similar separator (or amend the value
dnl as provided in autoconf 2.5x).
AC_DEFUN([CF_PATHSEP],
[
	AC_MSG_CHECKING(for PATH separator)
	case "$cf_cv_system_name" in
	(os2*)	PATH_SEPARATOR=';'  ;;
	(*)	${PATH_SEPARATOR:=':'}  ;;
	esac
ifelse([$1],,,[$1=$PATH_SEPARATOR])
	AC_SUBST(PATH_SEPARATOR)
	AC_MSG_RESULT($PATH_SEPARATOR)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PATH_SYNTAX version: 18 updated: 2020/12/31 18:40:20
dnl --------------
dnl Check the argument to see that it looks like a pathname.  Rewrite it if it
dnl begins with one of the prefix/exec_prefix variables, and then again if the
dnl result begins with 'NONE'.  This is necessary to work around autoconf's
dnl delayed evaluation of those symbols.
AC_DEFUN([CF_PATH_SYNTAX],[
if test "x$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_PKG_CONFIG version: 13 updated: 2023/10/28 11:59:01
dnl -------------
dnl Check for the package-config program, unless disabled by command-line.
dnl
dnl Sets $PKG_CONFIG to the pathname of the pkg-config program.
AC_DEFUN([CF_PKG_CONFIG],
[
AC_MSG_CHECKING(if you want to use pkg-config)
AC_ARG_WITH(pkg-config,
	[[  --with-pkg-config[=CMD] enable/disable use of pkg-config and its name CMD]],
	[cf_pkg_config=$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: 12 updated: 2023/02/18 17:41:25
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],
[AC_REQUIRE([CF_POSIX_VISIBLE])dnl

if test "$cf_cv_posix_visible" = no; then

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
#error _POSIX_C_SOURCE is not defined
#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
#error _POSIX_SOURCE is defined
#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="$cf_trim_CPPFLAGS"
	 CF_APPEND_TEXT(CPPFLAGS,$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
#error _POSIX_C_SOURCE is not defined
#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

fi # cf_cv_posix_visible

])dnl
dnl ---------------------------------------------------------------------------
dnl CF_POSIX_VISIBLE version: 1 updated: 2018/12/31 20:46:17
dnl ----------------
dnl POSIX documents test-macros which an application may set before any system
dnl headers are included to make features available.
dnl
dnl Some BSD platforms (originally FreeBSD, but copied by a few others)
dnl diverged from POSIX in 2002 by setting symbols which make all of the most
dnl recent features visible in the system header files unless the application
dnl overrides the corresponding test-macros.  Doing that introduces portability
dnl problems.
dnl
dnl This macro makes a special check for the symbols used for this, to avoid a
dnl conflicting definition.
AC_DEFUN([CF_POSIX_VISIBLE],
[
AC_CACHE_CHECK(if the POSIX test-macros are already defined,cf_cv_posix_visible,[
AC_TRY_COMPILE([#include <stdio.h>],[
#if defined(__POSIX_VISIBLE) && ((__POSIX_VISIBLE - 0L) > 0) \
	&& defined(__XSI_VISIBLE) && ((__XSI_VISIBLE - 0L) > 0) \
	&& defined(__BSD_VISIBLE) && ((__BSD_VISIBLE - 0L) > 0) \
	&& defined(__ISO_C_VISIBLE) && ((__ISO_C_VISIBLE - 0L) > 0)
#error conflicting symbols found
#endif
],[cf_cv_posix_visible=no],[cf_cv_posix_visible=yes])
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_AR version: 1 updated: 2009/01/01 20:15:22
dnl ----------
dnl Check for archiver "ar".
AC_DEFUN([CF_PROG_AR],[
AC_CHECK_TOOL(AR, ar, ar)
])
dnl ---------------------------------------------------------------------------
dnl CF_PROG_AWK version: 1 updated: 2006/09/16 11:40:59
dnl -----------
dnl Check for awk, ensure that the check found something.
AC_DEFUN([CF_PROG_AWK],
[
AC_PROG_AWK
test -z "$AWK" && AC_MSG_ERROR(No awk program found)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_CC version: 5 updated: 2019/12/31 08:53:54
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],[
CF_ACVERSION_CHECK(2.53,
	[AC_MSG_WARN(this will incorrectly handle gnatgcc choice)
	 AC_REQUIRE([AC_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_CC_C_O version: 6 updated: 2021/01/01 13:31:04
dnl --------------
dnl Analogous to AC_PROG_CC_C_O, but more useful: tests only $CC, ensures that
dnl the output file can be renamed, and allows for a shell variable that can
dnl be used later.  The parameter is either CC or CXX.  The result is the
dnl cache variable:
dnl	$cf_cv_prog_CC_c_o
dnl	$cf_cv_prog_CXX_c_o
dnl
dnl $1 = compiler
dnl $2 = compiler options, if any
AC_DEFUN([CF_PROG_CC_C_O],
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING([whether [$]$1 understands -c and -o together])
AC_CACHE_VAL(cf_cv_prog_$1_c_o,
[
cat > conftest.$ac_ext <<CF_EOF
int main(void)
{
	${cf_cv_main_return:-return}(0);
}
CF_EOF
# We do the test twice because some compilers refuse to overwrite an
# existing .o file with -o, though they will create one.
ac_try='[$]$1 $2 -c conftest.$ac_ext -o conftest2.$ac_objext >&AC_FD_CC'
if AC_TRY_EVAL(ac_try) &&
  test -f conftest2.$ac_objext && AC_TRY_EVAL(ac_try);
then
  eval cf_cv_prog_$1_c_o=yes
else
  eval cf_cv_prog_$1_c_o=no
fi
rm -rf ./conftest*
])dnl
if test "$cf_cv_prog_$1_c_o" = yes; then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_EGREP version: 2 updated: 2015/04/18 08:56:57
dnl -------------
dnl AC_PROG_EGREP was introduced in autoconf 2.53.
dnl This macro adds a check to ensure the script found something.
AC_DEFUN([CF_PROG_EGREP],
[AC_CACHE_CHECK([for egrep], [ac_cv_prog_egrep],
	[if echo a | (grep -E '(a|b)') >/dev/null 2>&1
		then ac_cv_prog_egrep='grep -E'
		else ac_cv_prog_egrep='egrep'
	fi])
	EGREP=$ac_cv_prog_egrep
	AC_SUBST([EGREP])
	test -z "$EGREP" && AC_MSG_ERROR(No egrep program found)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_EXT version: 15 updated: 2021/01/02 09:31:20
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="$CFLAGS -Zmt"
	CF_APPEND_TEXT(CPPFLAGS,-D__ST_MT_ERRNO__)
	CXXFLAGS="$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,"$PROG_EXT",[Define to the program extension (normally blank)])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_GNAT version: 12 updated: 2021/01/02 17:09:14
dnl ------------
dnl Check for gnat/gnatmake/etc, ensure that the toolset is complete.
AC_DEFUN([CF_PROG_GNAT],[
for cf_prog_gnat in gnat gnatmake gprconfig gprbuild
do
	CF_UPPER(cf_upper_prog_gnat,${cf_prog_gnat})

	unset ac_cv_path_cf_TEMP_gnat
	unset cf_TEMP_gnat
	AC_PATH_PROG(cf_TEMP_gnat,$cf_prog_gnat,no)
	eval "cf_cv_PATH_$cf_upper_prog_gnat=[$]ac_cv_path_cf_TEMP_gnat"

	if test "x$cf_TEMP_gnat" != xno; then
		unset cf_cv_gnat_version
		unset cf_TEMP_gnat
		CF_GNAT_VERSION(cf_TEMP_gnat,$cf_prog_gnat)
	fi
	eval "cf_cv_VERSION_$cf_upper_prog_gnat=[$]cf_TEMP_gnat"

	unset cf_TEMP_gnat
	unset cf_cv_gnat_version
	unset ac_cv_path_cf_TEMP_gnat
done

if test "x$cf_cv_VERSION_GNATMAKE" = "xno"; then
	cf_ada_make=
	cf_cv_prog_gnat_correct=no
else
	cf_ada_make=gnatmake
	if test "x$cf_cv_VERSION_GPRCONFIG" = "xno"; then
		# gprconfig is newer than gnatmake; we can continue...
		cf_ada_config="##"
	else
		rm -rf ./conftest* ./*~conftest*
		if mkdir conftest.src
		then
			cf_ada_config=""
			cd conftest.src
			for cf_gprconfig in Ada C
			do
				AC_MSG_CHECKING(for gprconfig name for $cf_gprconfig)
				if test "$cf_gprconfig" = C
				then
					for cf_gprconfig_param in \
						"$cf_gprconfig,,,,GNATGCC" \
						"$cf_gprconfig,,,,GCC" \
						"$cf_gprconfig"
					do
						cf_gprconfig_value=`echo s| gprconfig --config=$cf_gprconfig_param 2>&AC_FD_CC | ${AWK:-awk} '/^\*/{print [$]3;}' | head -n 1`
						test -n "$cf_gprconfig_value" && break
					done
				else
					cf_gprconfig_param=$cf_gprconfig
					cf_gprconfig_value=`echo s| gprconfig --config=$cf_gprconfig_param 2>&AC_FD_CC | ${AWK:-awk} '/^\*/{print [$]3;}' | head -n 1`
				fi
				if test -n "$cf_gprconfig_value"
				then
					eval "cf_ada_config_[$]cf_gprconfig=[$]cf_gprconfig_value"
					AC_MSG_RESULT($cf_gprconfig_value)
				else
					AC_MSG_RESULT(missing)
					cf_ada_config="#"
					break
				fi
			done
			cd ..
			rm -rf ./conftest* ./*~conftest*
		fi
	fi
	if test "x$cf_ada_config" != "x#"
	then
		CF_GNAT_VERSION
		CF_CHECK_GNAT_VERSION
		AC_CHECK_PROG(M4_exists, m4, yes, no)
		if test "$ac_cv_prog_M4_exists" = no; then
			cf_cv_prog_gnat_correct=no
			AC_MSG_WARN(Ada95 binding required program m4 not found. Ada95 binding disabled)
		fi
		if test "$cf_cv_prog_gnat_correct" = yes; then
			AC_MSG_CHECKING(if GNAT works)
			CF_GNAT_TRY_RUN([procedure conftest;],
[with Text_IO;
with GNAT.OS_Lib;
procedure conftest is
begin
   Text_IO.Put ("Hello World");
   Text_IO.New_Line;
   GNAT.OS_Lib.OS_Exit (0);
end conftest;],
[cf_cv_prog_gnat_correct=yes],
[cf_cv_prog_gnat_correct=no])
			AC_MSG_RESULT($cf_cv_prog_gnat_correct)
		fi
	else
		cf_cv_prog_gnat_correct=no
	fi
fi

AC_SUBST(cf_ada_make)
AC_SUBST(cf_ada_config)
AC_SUBST(cf_ada_config_Ada)
AC_SUBST(cf_ada_config_C)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_PROG_INSTALL version: 10 updated: 2021/01/04 19:33:05
dnl ---------------
dnl Force $INSTALL to be an absolute-path.  Otherwise, edit_man.sh and the
dnl misc/tabset install won't work properly.  Usually this happens only when
dnl using the fallback mkinstalldirs script
AC_DEFUN([CF_PROG_INSTALL],
[AC_PROG_INSTALL
case $INSTALL in
(/*)
	;;
(*)
	CF_DIRNAME(cf_dir,$INSTALL)
	test -z "$cf_dir" && cf_dir=.
	INSTALL="`cd \"$cf_dir\" && pwd`"/"`echo "$INSTALL" | sed -e 's%^.*/%%'`"
	;;
esac
])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_CFLAGS version: 3 updated: 2021/09/05 17:25:40
dnl ----------------
dnl Remove a given option from CFLAGS/CPPFLAGS
dnl $1 = option to remove
dnl $2 = variable to update
dnl $3 = nonempty to allow verbose message
define([CF_REMOVE_CFLAGS],
[
cf_tmp_cflag=`echo "x$1" | sed -e 's/^.//' -e 's/=.*//'`
while true
do
	cf_old_cflag=`echo "x[$]$2" | sed -e 's/^.//' -e 's/[[ 	]][[ 	]]*-/ -/g' -e "s%$cf_tmp_cflag\\(=[[^ 	]][[^ 	]]*\\)\?%%" -e 's/^[[ 	]]*//' -e 's%[[ ]][[ ]]*-D% -D%g' -e 's%[[ ]][[ ]]*-I% -I%g'`
	test "[$]$2" != "$cf_old_cflag" || break
	ifelse([$3],,,[CF_VERBOSE(removing old option $1 from $2)])
	$2="$cf_old_cflag"
done
])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_REMOVE_LIB version: 1 updated: 2007/02/17 14:11:52
dnl -------------
dnl Remove the given library from the symbol
dnl
dnl $1 = target (which could be the same as the source variable)
dnl $2 = source (including '$')
dnl $3 = library to remove
define([CF_REMOVE_LIB],
[
# remove $3 library from $2
$1=`echo "$2" | sed -e 's/-l$3[[ 	]]//g' -e 's/-l$3[$]//'`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_RESTORE_XTRA_FLAGS version: 1 updated: 2020/01/11 16:47:45
dnl ---------------------
dnl Restore flags saved in CF_SAVE_XTRA_FLAGS
dnl $1 = name of current macro
define([CF_RESTORE_XTRA_FLAGS],
[
LIBS="$cf_save_LIBS_$1"
CFLAGS="$cf_save_CFLAGS_$1"
CPPFLAGS="$cf_save_CPPFLAGS_$1"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SAVE_XTRA_FLAGS version: 1 updated: 2020/01/11 16:46:44
dnl ------------------
dnl Use this macro to save CFLAGS/CPPFLAGS/LIBS before checks against X headers
dnl and libraries which do not update those variables.
dnl
dnl $1 = name of current macro
define([CF_SAVE_XTRA_FLAGS],
[
cf_save_LIBS_$1="$LIBS"
cf_save_CFLAGS_$1="$CFLAGS"
cf_save_CPPFLAGS_$1="$CPPFLAGS"
LIBS="$LIBS ${X_PRE_LIBS} ${X_LIBS} ${X_EXTRA_LIBS}"
for cf_X_CFLAGS in $X_CFLAGS
do
	case "x$cf_X_CFLAGS" in
	x-[[IUD]]*)
		CPPFLAGS="$CPPFLAGS $cf_X_CFLAGS"
		;;
	*)
		CFLAGS="$CFLAGS $cf_X_CFLAGS"
		;;
	esac
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_SHARED_OPTS version: 111 updated: 2024/03/29 20:08:49
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 is 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(whether to use release or ABI version in shared library file names)
	AC_ARG_WITH(shlib-version,
	[[  --with-shlib-version[={rel|abi}] use release or ABI version in shared library file names]],
	[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=

	cf_try_fPIC=no
	if test "$GCC" = yes
	then
		cf_try_fPIC=yes
	else
		case "$cf_cv_system_name" in
		(*linux*)	# e.g., PGI compiler
			cf_try_fPIC=yes
			;;
		esac
	fi

	if test "$cf_try_fPIC" = 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 $CC_SHARED_OPTS"
			AC_TRY_COMPILE([#include <stdio.h>],[int x = 1; (void)x],[break],[])
		done
		AC_MSG_RESULT($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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-brtl -Wl,-blibpath:${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} ${LDFLAGS} ${CFLAGS} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
		fi
		;;
	(beos*)
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${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 \[$]* ${LDFLAGS} -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 \[$]* ${LDFLAGS} -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} ${LDFLAGS} ${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="$LDFLAGS -Wl,-search_paths_first"
		fi
		;;
	(haiku*)
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(hpux[[7-8]]*)
		# HP-UX 8.07 ld lacks "+b" option used for libdir search-list
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='+Z'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} -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} ${LDFLAGS} +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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-rpath,${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} ${LDFLAGS} ${CFLAGS} -shared -rdata_shared -soname `basename $[@]` -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,`basename $[@]` -o $[@]'
		fi
		cf_cv_rm_so_locs=yes
		;;
	(linux*|gnu*|k*bsd*-gnu)
		if test "$DFT_LWR_MODEL" = "shared" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(mingw*msvc*)
		cf_cv_shlib_version=msvcdll
		cf_cv_shlib_version_infix=msvcdll
		shlibdir=$bindir
		MAKE_DLLS=
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-link -dll"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="-link -dll $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ ${LD} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.lib"
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.lib/'\`
		shift
		my_ld=\[$]1
		shift
		cat <<-EOF
		Linking shared library
		** SHARED LIB \$SHARED_LIB
		** IMPORT_LIB \$IMPORT_LIB
EOF
		args=\$(echo \[$]* | sed -E "s#-l(\w*)#\1.dll.lib#g" | sed -E "s#-L(\w*)#-LIBPATH:\1#g")
		exec \$my_ld -DLL -IMPLIB:"\${IMPORT_LIB}" -OUT:"\${SHARED_LIB}" ${LDFLAGS} \$args
		mv "\${IMPORT_LIB}" "\${IMPORT_LIB}"
CF_EOF
		chmod +x mk_shared_lib.sh
		cat >mk_prog.sh <<-CF_EOF
		#!$SHELL
		shift
		# Ignore first argument (compiler) and use LD (link.exe) unconditionally
		LD="[$]LD"
		clopts=()
		ldopts=("/subsystem:console")
		libs=()
		isdll=0
		while test \[$]# -gt 0; do
			case "\[$]1" in
				-link)
					# ignore -link argument
					;;
				-M[[TD]] | -M[[TD]]d)
					# ignore runtime-library option
					;;
				-dll)
					isdll=1
					;;
				-W* | -w*)
					# ignore warnings
					;;
				-D*)
					clopts+=("\[$]1")
					;;
				-I*)
					clopts+=("\[$]1")
					;;
				-l*)
					libs+=("\`echo \"\[$]1\" | sed \"s/^-l//\"\`")
					;;
				-L*)
					ldopts+=("\`echo \"\[$]1\" | sed \"s/^-L/-LIBPATH:/\"\`")
					;;
				*.obj | *.o)
					ldopts+=("\[$]1")
					;;
				-Wl,*)
					for linkarg in \`echo '\[$]1' | sed -e 's/-Wl,//' -e 's/,/ /'\`; do
						ldopts+=("\[$]{linkarg}")
					done
					;;
				*.lib)
					ldopts+=("\[$]1")
					;;
				-o)
					shift
					ldopts+=("-out:\[$]1")
					;;
				*)
					clopts+=("\[$]1")
					ldopts+=("\[$]1")
					;;
			esac
			shift
		done
		if [[ "\$isdll" -ne 0 ]]; then
			for lib in \[$]{libs[[*]]}; do
				ldopts+=("\[$]lib.dll.lib")
			done
		else
			for lib in \[$]{libs[[*]]}; do
				ldopts+=("\[$]lib.lib")
			done
		fi
		cat <<-EOF
		Creating program
		** ld options:   "\[$]{ldopts[[@]]}"
EOF
		exec \[$]LD \[$]{ldopts[[@]]}
CF_EOF
		chmod +x mk_prog.sh
		LINK_PROGS="$SHELL ${rel_builddir}/mk_prog.sh"
		LINK_TESTS="$SHELL ${rel_builddir}/mk_prog.sh"
		;;
	(mingw*)
		cf_cv_shlib_version=mingw
		cf_cv_shlib_version_infix=mingw
		shlibdir=$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 \[$]* ${LDFLAGS} -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" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-Bshareable,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(nskJ*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${LD} -Wshared -Weld=-export_all -o $[@]'
		;;
	(nskL*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${LD} -Wshared -Wxld=-export_all -o $[@]'
		;;
	(nto-qnx*|openbsd*|freebsd[[12]].*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		MK_SHARED_LIB='${LD} ${LDFLAGS} -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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$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} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -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} ${LDFLAGS} -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" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${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} ${LDFLAGS} -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} ${LDFLAGS} -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} ${LDFLAGS} ${CFLAGS} -dy -G -Wl,-h,'$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -dy -G -Wl,-h,'$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} ${LDFLAGS} -d y -G -o [$]@'
		;;
	(*)
		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_STRIP_G_OPT version: 4 updated: 2021/01/02 09:31:20
dnl --------------
dnl	Remove "-g" option from the compiler options
AC_DEFUN([CF_STRIP_G_OPT],
[$1=`echo "${$1}" | CF__SED_TRIMBLANKS(-e 's%-g %%' -e 's%-g$%%')`])dnl
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,$prefix)
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_TERM_HEADER version: 6 updated: 2021/01/02 09:31:20
dnl --------------
dnl Look for term.h, which is part of X/Open curses.  It defines the interface
dnl to terminfo database.  Usually it is in the same include-path as curses.h,
dnl but some packagers change this, breaking various applications.
AC_DEFUN([CF_TERM_HEADER],[
AC_CACHE_CHECK(for terminfo header, cf_cv_term_header,[
case "${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 <$cf_test>
],[int x = auto_left_margin; (void)x],[
	cf_cv_term_header="$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`,$1)
AC_SUBST(top_builddir)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_TRY_XOPEN_SOURCE version: 4 updated: 2022/09/10 15:16:16
dnl -------------------
dnl If _XOPEN_SOURCE is not defined in the compile environment, check if we
dnl can define it successfully.
AC_DEFUN([CF_TRY_XOPEN_SOURCE],[
AC_CACHE_CHECK(if we should define _XOPEN_SOURCE,cf_cv_xopen_source,[
	AC_TRY_COMPILE(CF__XOPEN_SOURCE_HEAD,CF__XOPEN_SOURCE_BODY,
	[cf_cv_xopen_source=no],
	[cf_save="$CPPFLAGS"
	 CF_APPEND_TEXT(CPPFLAGS,-D_XOPEN_SOURCE=$cf_XOPEN_SOURCE)
	 AC_TRY_COMPILE(CF__XOPEN_SOURCE_HEAD,CF__XOPEN_SOURCE_BODY,
		[cf_cv_xopen_source=no],
		[cf_cv_xopen_source=$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_APPEND_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 "$2" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_UTF8_LIB version: 10 updated: 2023/01/11 04:05:23
dnl -----------
dnl Check for multibyte support, and if not found, utf8 compatibility library
AC_DEFUN([CF_UTF8_LIB],
[
AC_HAVE_HEADERS(wchar.h)
AC_CACHE_CHECK(for multibyte character support,cf_cv_utf8_lib,[
	cf_save_LIBS="$LIBS"
	AC_TRY_LINK([
$ac_includes_default
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif
],[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_WEAK_SYMBOLS version: 1 updated: 2008/08/16 19:18:06
dnl ---------------
dnl Check for compiler-support for weak symbols.
dnl This works with "recent" gcc.
AC_DEFUN([CF_WEAK_SYMBOLS],[
AC_CACHE_CHECK(if $CC supports weak symbols,cf_cv_weak_symbols,[

AC_TRY_COMPILE([
#include <stdio.h>],
[
#if defined(__GNUC__)
#  if defined __USE_ISOC99
#    define _cat_pragma(exp)	_Pragma(#exp)
#    define _weak_pragma(exp)	_cat_pragma(weak name)
#  else
#    define _weak_pragma(exp)
#  endif
#  define _declare(name)	__extension__ extern __typeof__(name) name
#  define weak_symbol(name)	_weak_pragma(name) _declare(name) __attribute__((weak))
#endif

weak_symbol(fopen);
],[cf_cv_weak_symbols=yes],[cf_cv_weak_symbols=no])
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_ADA_COMPILER version: 3 updated: 2023/10/28 11:59:01
dnl --------------------
dnl Command-line option to specify the Ada95 compiler.
AC_DEFUN([CF_WITH_ADA_COMPILER],[
AC_MSG_CHECKING(for Ada95 compiler)
AC_ARG_WITH(ada-compiler,
	[[  --with-ada-compiler[=CMD] use CMD as Ada95 compiler (default: gnatmake)]],
	[cf_ada_compiler=$withval],
	[cf_ada_compiler=gnatmake])
AC_SUBST(cf_ada_compiler)
AC_MSG_RESULT($cf_ada_compiler)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_ADA_INCLUDE version: 3 updated: 2023/10/28 11:59:01
dnl -------------------
dnl Command-line option to specify where Ada includes will install.
AC_DEFUN([CF_WITH_ADA_INCLUDE],[
AC_MSG_CHECKING(for Ada95 include directory)
CF_WITH_PATH(ada-include,
   [  --with-ada-include=DIR  find Ada95 includes in DIR],
   ADA_INCLUDE,
   PREFIX/share/ada/adainclude,
   [$]prefix/share/ada/adainclude)
AC_SUBST(ADA_INCLUDE)
AC_MSG_RESULT($ADA_INCLUDE)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_ADA_LIBNAME version: 3 updated: 2023/11/22 20:48:30
dnl -------------------
dnl CF_WITH_ADA_LIBNAME
dnl -------------------
dnl Command-line option to specify how to name the resulting Ada library.
dnl $1 = default value
AC_DEFUN([CF_WITH_ADA_LIBNAME],[
AC_MSG_CHECKING(for Ada95 curses library name)
AC_ARG_WITH(ada-libname,
   [[  --with-ada-libname[=XXX]  use XXX as Ada95 library name]],
   ADA_LIBNAME=[$]withval,
   ADA_LIBNAME=$1)
case "x$ADA_LIBNAME" in
(x|xyes|xno)
	ADA_LIBNAME=$1
	;;
esac
AC_SUBST(ADA_LIBNAME)
AC_MSG_RESULT($ADA_LIBNAME)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_ADA_OBJECTS version: 3 updated: 2023/10/28 11:59:01
dnl -------------------
dnl Command-line option to specify where Ada objects will install.
AC_DEFUN([CF_WITH_ADA_OBJECTS],[
AC_MSG_CHECKING(for Ada95 object directory)
CF_WITH_PATH(ada-objects,
   [  --with-ada-objects=DIR  find Ada95 objects in DIR],
   ADA_OBJECTS,
   PREFIX/lib/ada/adalib,
   [$]prefix/lib/ada/adalib)
AC_SUBST(ADA_OBJECTS)
AC_MSG_RESULT($ADA_OBJECTS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_ADA_SHAREDLIB version: 6 updated: 2023/10/28 11:59:01
dnl ---------------------
dnl Command-line option to specify if an Ada95 shared library should be built,
dnl and optionally what its soname should be.
AC_DEFUN([CF_WITH_ADA_SHAREDLIB],[
AC_REQUIRE([CF_GNAT_PROJECTS])
AC_MSG_CHECKING(whether to build an Ada95 shared library)
AC_ARG_WITH(ada-sharedlib,
	[  --with-ada-sharedlib    build Ada95 shared library; requires GNAT project support],
	[with_ada_sharedlib=$withval],
	[with_ada_sharedlib=no])
cf_ada_sharedlib_warn=no

if test "x$with_ada_sharedlib" != xno
then
	if test "x$cf_gnat_projects" != xyes
	then
		with_ada_sharedlib=no
		cf_ada_sharedlib_warn=yes
	fi
fi

AC_MSG_RESULT($with_ada_sharedlib)
if test "x$cf_ada_sharedlib_warn" != xno
then
	AC_MSG_WARN(disabling Ada95 shared library since GNAT projects are not supported)
fi

ADA_SHAREDLIB='lib$(LIB_NAME).so.1'
MAKE_ADA_SHAREDLIB="#"

if test "x$with_ada_sharedlib" != xno
then
	MAKE_ADA_SHAREDLIB=
	if test "x$with_ada_sharedlib" != xyes
	then
		ADA_SHAREDLIB="$with_ada_sharedlib"
	fi
fi

AC_SUBST(ADA_SHAREDLIB)
AC_SUBST(MAKE_ADA_SHAREDLIB)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_CURSES_DIR version: 4 updated: 2021/01/02 19:22:58
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_LIB_PREFIX version: 2 updated: 2021/01/01 16:53:59
dnl ------------------
dnl Allow the library-prefix to be overridden.  OS/2 EMX originally had no
dnl "lib" prefix, e.g., because it used the dll naming convention.
dnl
dnl $1 = variable to set
AC_DEFUN([CF_WITH_LIB_PREFIX],
[
AC_MSG_CHECKING(if you want to have a library-prefix)
AC_ARG_WITH(lib-prefix,
	[  --with-lib-prefix       override library-prefix],
	[with_lib_prefix=$withval],
	[with_lib_prefix=auto])
AC_MSG_RESULT($with_lib_prefix)

if test "$with_lib_prefix" = auto
then
	CF_LIB_PREFIX($1)
elif test "$with_lib_prefix" = no
then
	LIB_PREFIX=
else
	LIB_PREFIX=$with_lib_prefix
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_PATH version: 12 updated: 2021/09/04 06:35:04
dnl ------------
dnl Wrapper for AC_ARG_WITH to ensure that user supplies a pathname, not just
dnl defaulting to yes/no.
dnl
dnl $1 = option name
dnl $2 = help-text
dnl $3 = environment variable to set
dnl $4 = default value, shown in the help-message, must be a constant
dnl $5 = default value, if it is an expression & cannot be in the help-message
dnl
AC_DEFUN([CF_WITH_PATH],
[AC_ARG_WITH($1,[$2 ](default: ifelse([$4],,empty,[$4])),,
ifelse([$4],,[withval="${$3}"],[withval="${$3:-ifelse([$5],,[$4],[$5])}"]))dnl
if ifelse([$5],,true,[test -n "$5"]) ; then
CF_PATH_SYNTAX(withval)
fi
eval $3="$withval"
AC_SUBST($3)dnl
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_PKG_CONFIG_LIBDIR version: 23 updated: 2023/11/22 20:48:30
dnl -------------------------
dnl Allow the choice of the pkg-config library directory to be overridden.
dnl
dnl pkg-config uses a search-list built from these colon-separated lists of
dnl directories:
dnl a) $PKG_CONFIG_PATH (tested first, added if set)
dnl b) $PKG_CONFIG_LIBDIR (tested second, added if set)
dnl c) builtin-list (added if $PKG_CONFIG_LIBDIR is not set)
dnl
dnl pkgconf (used with some systems such as FreeBSD in place of pkg-config)
dnl optionally ignores $PKG_CONFIG_LIBDIR.  Very old versions of pkg-config,
dnl e.g., Solaris 10 also do not recognize $PKG_CONFIG_LIBDIR.
AC_DEFUN([CF_WITH_PKG_CONFIG_LIBDIR],[

case "$PKG_CONFIG" in
(no|none|yes)
	AC_MSG_CHECKING(for pkg-config library directory)
	;;
(*)
	AC_MSG_CHECKING(for $PKG_CONFIG library directory)
	;;
esac

# if $PKG_CONFIG_LIBDIR is set, try to use that
if test -n "$PKG_CONFIG_PATH"; then
	cf_search_path=`echo "$PKG_CONFIG_PATH" | sed -e 's/:/ /g' -e 's,^[[ 	]]*,,' -e 's,[[ 	]]*$,,'`
elif test -n "$PKG_CONFIG_LIBDIR"; then
	cf_search_path=`echo "$PKG_CONFIG_LIBDIR" | sed -e 's/:/ /g' -e 's,^[[ 	]]*,,' -e 's,[[ 	]]*$,,'`
else
	cf_search_path=auto
fi

# if the option is used, let that override.  otherwise default to "libdir"
AC_ARG_WITH(pkg-config-libdir,
	[[  --with-pkg-config-libdir[=XXX] use given directory for installing pc-files]],
	[cf_search_path=$withval],
	[test "x$PKG_CONFIG" != xnone && test -z "$cf_search_path" && cf_search_path=libdir])

case "x$cf_search_path" in
(xlibdir)
	PKG_CONFIG_LIBDIR='${libdir}/pkgconfig'
	AC_MSG_RESULT($PKG_CONFIG_LIBDIR)
	cf_search_path=
	;;
(x)
	;;
(x/*\ *)
	PKG_CONFIG_LIBDIR=
	;;
(x/*)
	PKG_CONFIG_LIBDIR="$cf_search_path"
	AC_MSG_RESULT($PKG_CONFIG_LIBDIR)
	cf_search_path=
	;;
(xyes|xauto)
	AC_MSG_RESULT(auto)
	cf_search_path=
	# Look for the library directory using the same prefix as the executable
	AC_MSG_CHECKING(for search-list)
	if test "x$PKG_CONFIG" != xnone
	then
		# works for pkg-config since version 0.24 (2009)
		# works for pkgconf since version 0.8.3 (2012)
		for cf_pkg_program in \
			`echo "$PKG_CONFIG" | sed -e 's,^.*/,,'` \
			pkg-config \
			pkgconf
		do
			cf_search_path=`"$PKG_CONFIG" --variable=pc_path "$cf_pkg_program" 2>/dev/null | tr : ' '`
			test -n "$cf_search_path" && break
		done

		# works for pkg-config since import in 2005 of original 2001 HP code.
		test -z "$cf_search_path" && \
		cf_search_path=`
		"$PKG_CONFIG" --debug --exists no-such-package 2>&1 | $AWK "\
/^Scanning directory (#[1-9][0-9]* )?'.*'$/{ \
	sub(\"^[[^']]*'\",\"\"); \
	sub(\"'.*\",\"\"); \
	printf \" %s\", \\[$]0; } \
{ next; } \
"`
	fi

	AC_MSG_RESULT($cf_search_path)
	;;
(*)
	AC_MSG_ERROR(Unexpected option value: $cf_search_path)
	;;
esac

if test -n "$cf_search_path"
then
	AC_MSG_CHECKING(for first directory)
	cf_pkg_config_path=none
	for cf_config in $cf_search_path
	do
		if test -d "$cf_config"
		then
			cf_pkg_config_path=$cf_config
			break
		fi
	done
	AC_MSG_RESULT($cf_pkg_config_path)

	if test "x$cf_pkg_config_path" != xnone ; then
		# limit this to the first directory found
		PKG_CONFIG_LIBDIR="$cf_pkg_config_path"
	fi

	if test -z "$PKG_CONFIG_LIBDIR" && test -n "$cf_search_path"
	then
		AC_MSG_CHECKING(for workaround)
		if test "$prefix" = "NONE" ; then
			cf_prefix="$ac_default_prefix"
		else
			cf_prefix="$prefix"
		fi
		eval cf_libdir=$libdir
		cf_libdir=`echo "$cf_libdir" | sed -e "s,^NONE,$cf_prefix,"`
		cf_backup=
		for cf_config in $cf_search_path
		do
			case $cf_config in
			$cf_libdir/pkgconfig)
				PKG_CONFIG_LIBDIR=$cf_libdir/pkgconfig
				break
				;;
			*)
				test -z "$cf_backup" && cf_backup=$cf_config
				;;
			esac
		done
		test -z "$PKG_CONFIG_LIBDIR" && PKG_CONFIG_LIBDIR=$cf_backup
		AC_MSG_RESULT($PKG_CONFIG_LIBDIR)
	fi
fi

AC_SUBST(PKG_CONFIG_LIBDIR)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITH_PTHREAD version: 7 updated: 2015/04/18 08:56:57
dnl ---------------
dnl Check for POSIX thread library.
AC_DEFUN([CF_WITH_PTHREAD],
[
AC_MSG_CHECKING(if you want to link with the pthread library)
AC_ARG_WITH(pthread,
	[  --with-pthread          use POSIX thread library],
	[with_pthread=$withval],
	[with_pthread=no])
AC_MSG_RESULT($with_pthread)

if test "$with_pthread" != no ; then
	AC_CHECK_HEADER(pthread.h,[
	AC_DEFINE(HAVE_PTHREADS_H,1,[Define to 1 if we have pthreads.h header])

	for cf_lib_pthread in pthread c_r
	do
	    AC_MSG_CHECKING(if we can link with the $cf_lib_pthread library)
	    cf_save_LIBS="$LIBS"
	    CF_ADD_LIB($cf_lib_pthread)
	    AC_TRY_LINK([
#include <pthread.h>
],[
		int rc = pthread_create(0,0,0,0);
		int r2 = pthread_mutexattr_settype(0, 0);
],[with_pthread=yes],[with_pthread=no])
	    LIBS="$cf_save_LIBS"
	    AC_MSG_RESULT($with_pthread)
	    test "$with_pthread" = yes && break
	done

	if test "$with_pthread" = yes ; then
	    CF_ADD_LIB($cf_lib_pthread)
	    AC_DEFINE(HAVE_LIBPTHREADS,1,[Define to 1 if we have pthreads library])
	else
	    AC_MSG_ERROR(Cannot link with pthread library)
	fi
	])
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_WITH_SYSTYPE version: 1 updated: 2013/01/26 16:26:12
dnl ---------------
dnl For testing, override the derived host system-type which is used to decide
dnl things such as the linker commands used to build shared libraries.  This is
dnl normally chosen automatically based on the type of system which you are
dnl building on.  We use it for testing the configure script.
dnl
dnl This is different from the --host option: it is used only for testing parts
dnl of the configure script which would not be reachable with --host since that
dnl relies on the build environment being real, rather than mocked up.
AC_DEFUN([CF_WITH_SYSTYPE],[
CF_CHECK_CACHE([AC_CANONICAL_SYSTEM])
AC_ARG_WITH(system-type,
	[  --with-system-type=XXX  test: override derived host system-type],
[AC_MSG_WARN(overriding system type to $withval)
	cf_cv_system_name=$withval
	host_os=$withval
])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_XOPEN_SOURCE version: 67 updated: 2023/09/06 18:55:27
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
dnl
dnl The default case prefers _XOPEN_SOURCE over _POSIX_C_SOURCE if the
dnl implementation predefines it, because X/Open and most implementations agree
dnl that the latter is a legacy or "aligned" value.
dnl
dnl Because _XOPEN_SOURCE is preferred, if defining _POSIX_C_SOURCE turns
dnl that off, then refrain from setting _POSIX_C_SOURCE explicitly.
dnl
dnl References:
dnl https://pubs.opengroup.org/onlinepubs/007904975/functions/xsh_chap02_02.html
dnl https://docs.oracle.com/cd/E19253-01/816-5175/standards-5/index.html
dnl https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
AC_DEFUN([CF_XOPEN_SOURCE],[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([CF_POSIX_VISIBLE])

if test "$cf_cv_posix_visible" = no; then

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

case "$host_os" in
(aix[[4-7]]*)
	cf_xopen_source="-D_ALL_SOURCE"
	;;
(darwin[[0-8]].*)
	cf_xopen_source="-D_APPLE_C_SOURCE"
	;;
(darwin*)
	cf_xopen_source="-D_DARWIN_C_SOURCE"
	cf_XOPEN_SOURCE=
	;;
(freebsd*|dragonfly*|midnightbsd*)
	# 5.x headers associate
	#	_XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
	#	_XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L
	cf_POSIX_C_SOURCE=200112L
	cf_XOPEN_SOURCE=600
	cf_xopen_source="-D_BSD_TYPES -D__BSD_VISIBLE -D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
	;;
(hpux11*)
	cf_xopen_source="-D_HPUX_SOURCE -D_XOPEN_SOURCE=500"
	;;
(hpux*)
	cf_xopen_source="-D_HPUX_SOURCE"
	;;
(irix[[56]].*)
	cf_xopen_source="-D_SGI_SOURCE"
	cf_XOPEN_SOURCE=
	;;
(linux*gnu|linux*gnuabi64|linux*gnuabin32|linux*gnueabi|linux*gnueabihf|linux*gnux32|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin|msys|mingw*|linux*uclibc)
	CF_GNU_SOURCE($cf_XOPEN_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($cf_POSIX_C_SOURCE)
	;;
(netbsd*)
	cf_xopen_source="-D_NETBSD_SOURCE" # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
	;;
(openbsd[[6-9]]*)
	# OpenBSD 6.x has broken locale support, both compile-time and runtime.
	# see https://www.mail-archive.com/bugs@openbsd.org/msg13200.html
	# Abusing the conformance level is a workaround.
	AC_MSG_WARN(this system does not provide usable locale support)
	cf_xopen_source="-D_BSD_SOURCE"
	cf_XOPEN_SOURCE=700
	;;
(openbsd[[4-5]]*)
	# setting _XOPEN_SOURCE lower than 500 breaks g++ compile with wchar.h, needed for ncursesw
	cf_xopen_source="-D_BSD_SOURCE"
	cf_XOPEN_SOURCE=600
	;;
(openbsd*)
	# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
	;;
(osf[[45]]*)
	cf_xopen_source="-D_OSF_SOURCE"
	;;
(nto-qnx*)
	cf_xopen_source="-D_QNX_SOURCE"
	;;
(sco*)
	# setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
	;;
(solaris2.*)
	cf_xopen_source="-D__EXTENSIONS__"
	cf_cv_xopen_source=broken
	;;
(sysv4.2uw2.*) # Novell/SCO UnixWare 2.x (tested on 2.1.2)
	cf_XOPEN_SOURCE=
	cf_POSIX_C_SOURCE=
	;;
(*)
	CF_TRY_XOPEN_SOURCE
	cf_save_xopen_cppflags="$CPPFLAGS"
	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
	# Some of these niche implementations use copy/paste, double-check...
	if test "$cf_cv_xopen_source" = no ; then
		CF_VERBOSE(checking if _POSIX_C_SOURCE interferes with _XOPEN_SOURCE)
		AC_TRY_COMPILE(CF__XOPEN_SOURCE_HEAD,CF__XOPEN_SOURCE_BODY,,[
			AC_MSG_WARN(_POSIX_C_SOURCE definition is not usable)
			CPPFLAGS="$cf_save_xopen_cppflags"])
	fi
	;;
esac

if test -n "$cf_xopen_source" ; then
	CF_APPEND_CFLAGS($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
#error _XOPEN_SOURCE is not defined
#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
#error (_XOPEN_SOURCE - 0) < $cf_XOPEN_SOURCE
#endif],
		[cf_XOPEN_SOURCE_set_ok=yes],
		[cf_XOPEN_SOURCE_set_ok=no])
		if test "$cf_XOPEN_SOURCE_set_ok" = no
		then
			AC_MSG_WARN(_XOPEN_SOURCE is lower than requested)
		fi
	else
		CF_TRY_XOPEN_SOURCE
	fi
fi
fi # cf_cv_posix_visible
])
dnl ---------------------------------------------------------------------------
dnl CF__SED_TRIMBLANKS version: 1 updated: 2021/01/02 09:31:20
dnl ------------------
dnl Trim something using sed, then trim extra whitespace
dnl $1 = extra parameters, e.g., in CF_STRIP_G_OPT
define([CF__SED_TRIMBLANKS],[sed ifelse($1,,,[$1] )-e 's%[[	]]% %g' -e 's% [[ ]]*% %g' -e 's%^ %%' -e 's% [$]%%'])dnl
dnl ---------------------------------------------------------------------------
dnl CF__XOPEN_SOURCE_BODY version: 2 updated: 2023/02/18 17:41:25
dnl ---------------------
dnl body of test when test-compiling for _XOPEN_SOURCE check
define([CF__XOPEN_SOURCE_BODY],
[
#ifndef _XOPEN_SOURCE
#error _XOPEN_SOURCE is not defined
#endif
])
dnl ---------------------------------------------------------------------------
dnl CF__XOPEN_SOURCE_HEAD version: 2 updated: 2023/02/18 17:41:25
dnl ---------------------
dnl headers to include when test-compiling for _XOPEN_SOURCE check
define([CF__XOPEN_SOURCE_HEAD],
[
$ac_includes_default
])