dnl $Id: aclocal.m4,v 1.15 2024/02/04 23:29:21 tom Exp $
dnl ---------------------------------------------------------------------------
dnl
dnl Copyright 2022-2023,2024 by Thomas E. Dickey
dnl
dnl                         All Rights Reserved
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, sublicense, and/or sell copies of the Software, and to
dnl permit persons to whom the Software is furnished to do so, subject to
dnl 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 LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
dnl CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
dnl TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
dnl SOFTWARE OR 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 rcs-blame's local definitions for autoconf.
dnl
dnl See
dnl		https://invisible-island.net/autoconf/autoconf.html
dnl		https://invisible-island.net/autoconf/my-autoconf.html
dnl ---------------------------------------------------------------------------
dnl ---------------------------------------------------------------------------
dnl AC_GNU_SOURCE version: 1 updated: 2022/11/13 14:26:50
dnl -------------
AC_DEFUN([AC_GNU_SOURCE], [
	CF_XOPEN_SOURCE
	dnl AC_MSG_WARN([use CF_XOPEN_SOURCE])
	dnl CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE"
] )
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_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_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_ANSI_CC_REQD version: 4 updated: 2008/03/23 14:48:54
dnl ---------------
dnl For programs that must use an ANSI compiler, obtain compiler options that
dnl will make it recognize prototypes.  We'll do preprocessor checks in other
dnl macros, since tools such as unproto can fake prototypes, but only part of
dnl the preprocessor.
AC_DEFUN([CF_ANSI_CC_REQD],
[AC_REQUIRE([CF_ANSI_CC_CHECK])
if test "$cf_cv_ansi_cc" = "no"; then
	AC_MSG_ERROR(
[Your compiler does not appear to recognize prototypes.
You have the following choices:
	a. adjust your compiler options
	b. get an up-to-date compiler
	c. use a wrapper such as unproto])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_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_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_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],,,[
	$4
])dnl
])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_C11_NORETURN version: 4 updated: 2023/02/18 17:41:25
dnl ---------------
AC_DEFUN([CF_C11_NORETURN],
[
AC_MSG_CHECKING(if you want to use C11 _Noreturn feature)
CF_ARG_ENABLE(stdnoreturn,
	[  --enable-stdnoreturn    enable C11 _Noreturn feature for diagnostics],
	[enable_stdnoreturn=yes],
	[enable_stdnoreturn=no])
AC_MSG_RESULT($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 CF_CHECK_SIZEOF version: 4 updated: 2021/01/02 09:31:20
dnl ---------------
dnl Improve on AC_CHECK_SIZEOF for cases when the build-environment is
dnl deficient, e.g., if someone tries to build in busybox.  Use the second
dnl parameter as the fallback value.
dnl
dnl By the way, 2.13/2.52 differ in AC_CHECK_SIZEOF regarding the types they
dnl can detect; the former includes only stdio.h for types while the latter
dnl includes several header files.
AC_DEFUN([CF_CHECK_SIZEOF],[
AC_CHECK_SIZEOF([$1],[$2])
if test "${ac_cv_type_$1+set}" = set; then
	cf_cv_sizeof="$ac_cv_sizeof_$1"
	if test "${ac_cv_sizeof_$1+set}" != set; then
		AC_MSG_WARN(using $2 for sizeof $1)
		ac_cv_sizeof_$1=$2
	elif test "x${ac_cv_sizeof_$1}" = x0; then
		AC_MSG_WARN([sizeof $1 not found, using $2])
		ac_cv_sizeof_$1=$2
	fi
	if test "x$ac_cv_sizeof_$1" != "x$cf_cv_sizeof"
	then
		CF_UPPER(cf_cv_type,sizeof_$1)
		sed -e "s/\\([[ 	]]${cf_cv_type}[[ 	]]\\).*/\\1$ac_cv_sizeof_$1/" confdefs.h >conftest.val
		mv conftest.val confdefs.h
	fi
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_CYGPATH_W version: 1 updated: 2022/11/13 14:26:50
dnl ------------
dnl test whether we have cygpath
AC_DEFUN([CF_CYGPATH_W],[
if test -z "$CYGPATH_W"; then
  if (cygpath --version) >/dev/null 2>/dev/null; then
    CYGPATH_W='cygpath -w'
  else
    CYGPATH_W=echo
  fi
fi
AC_SUBST(CYGPATH_W)
])
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_ECHO version: 14 updated: 2021/09/04 06:35:04
dnl ---------------
dnl You can always use "make -n" to see the actual options, but it is hard to
dnl pick out/analyze warning messages when the compile-line is long.
dnl
dnl Sets:
dnl	ECHO_LT - symbol to control if libtool is verbose
dnl	ECHO_LD - symbol to prefix "cc -o" lines
dnl	RULE_CC - symbol to put before implicit "cc -c" lines (e.g., .c.o)
dnl	SHOW_CC - symbol to put before explicit "cc -c" lines
dnl	ECHO_CC - symbol to put before any "cc" line
dnl
AC_DEFUN([CF_DISABLE_ECHO],[
AC_MSG_CHECKING(if you want to see long compiling messages)
CF_ARG_DISABLE(echo,
	[  --disable-echo          do not display "compiling" commands],
	[
	ECHO_LT='--silent'
	ECHO_LD='@echo linking [$]@;'
	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_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_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_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_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_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 "$cf_cv_struct_dirent64" = yes && AC_DEFINE(HAVE_STRUCT_DIRENT64,1,[Define to 1 if we have struct dirent64])
	fi
])
])
dnl ---------------------------------------------------------------------------
dnl CF_MSG_LOG version: 5 updated: 2010/10/23 15:52:32
dnl ----------
dnl Write a debug message to config.log, along with the line number in the
dnl configure script.
AC_DEFUN([CF_MSG_LOG],[
echo "${as_me:-configure}:__oline__: testing $* ..." 1>&AC_FD_CC
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_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_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_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_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 $cf_X_CFLAGS"
		;;
	esac
done
])dnl
dnl ---------------------------------------------------------------------------
dnl For "recent" (as of 2024) GNU libc, defining _TIME_BITS is a way to select
dnl a 64-bit time_t.  Report the size of time_t to show systems which might be
dnl converted.
AC_DEFUN([CF_SIZEOF_TIME_T],[
dnl AC_REQUIRE([CF_LARGEFILE])
dnl CF_VERBOSE(defining _TIME_BITS to 64)
dnl CF_APPEND_TEXT(CPPFLAGS,-D_TIME_BITS=64)
cf_save_includes="$ac_includes_default"
ac_includes_default="$ac_includes_default
#include <time.h>
"
CF_CHECK_SIZEOF(time_t,4)
ac_includes_default="$cf_save_includes"
])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 "$2" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_VERBOSE version: 3 updated: 2007/07/29 09:55:12
dnl ----------
dnl Use AC_VERBOSE w/o the warnings
AC_DEFUN([CF_VERBOSE],
[test -n "$verbose" && echo "	$1" 1>&AC_FD_MSG
CF_MSG_LOG([$1])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_WITHOUT_X version: 3 updated: 2021/01/13 16:51:52
dnl ------------
dnl Use this to cancel the check for X headers/libraries which would be pulled
dnl in via CF_GCC_WARNINGS.
define([CF_WITHOUT_X],
AC_DEFUN([AC_PATH_XTRA],[])
AC_DEFUN([CF_SAVE_XTRA_FLAGS],[])
AC_DEFUN([CF_RESTORE_XTRA_FLAGS],[])
AC_DEFUN([CF_CONST_X_STRING],[echo "skipping X-const check";])dnl
AC_SUBST(X_CFLAGS)
AC_SUBST(X_LIBS)
[])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__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
])
dnl ---------------------------------------------------------------------------
m4_include([m4/alloca.m4])
m4_include([m4/allocsa.m4])
m4_include([m4/argp.m4])
m4_include([m4/calloc.m4])
m4_include([m4/canonicalize.m4])
m4_include([m4/cycle-check.m4])
m4_include([m4/d-ino.m4])
m4_include([m4/dirname.m4])
m4_include([m4/dos.m4])
m4_include([m4/double-slash-root.m4])
m4_include([m4/eealloc.m4])
m4_include([m4/eoverflow.m4])
m4_include([m4/error.m4])
m4_include([m4/exitfail.m4])
m4_include([m4/extensions.m4])
m4_include([m4/filenamecat.m4])
m4_include([m4/free.m4])
m4_include([m4/getcwd-abort-bug.m4])
m4_include([m4/getcwd-path-max.m4])
m4_include([m4/getcwd.m4])
m4_include([m4/getdelim.m4])
m4_include([m4/getline.m4])
m4_include([m4/getopt.m4])
m4_include([m4/gettimeofday.m4])
m4_include([m4/gnulib-comp.m4])
m4_include([m4/inline.m4])
m4_include([m4/intmax_t.m4])
m4_include([m4/inttypes_h.m4])
m4_include([m4/langinfo.m4])
m4_include([m4/longdouble.m4])
m4_include([m4/longlong.m4])
m4_include([m4/lstat.m4])
m4_include([m4/mbchar.m4])
m4_include([m4/mbiter.m4])
m4_include([m4/mbrtowc.m4])
m4_include([m4/mbstate_t.m4])
m4_include([m4/memchr.m4])
m4_include([m4/memcmp.m4])
m4_include([m4/memcpy.m4])
m4_include([m4/memmove.m4])
m4_include([m4/mempcpy.m4])
m4_include([m4/memset.m4])
m4_include([m4/minmax.m4])
m4_include([m4/mktime.m4])
m4_include([m4/pathmax.m4])
m4_include([m4/readlink.m4])
m4_include([m4/setenv.m4])
m4_include([m4/size_max.m4])
m4_include([m4/ssize_t.m4])
m4_include([m4/stdbool.m4])
m4_include([m4/strcase.m4])
m4_include([m4/strchrnul.m4])
m4_include([m4/strdup.m4])
m4_include([m4/strftime.m4])
m4_include([m4/strndup.m4])
m4_include([m4/strnlen.m4])
m4_include([m4/strpbrk.m4])
m4_include([m4/strstr.m4])
m4_include([m4/strtol.m4])
m4_include([m4/strtoul.m4])
m4_include([m4/sysexits.m4])
m4_include([m4/time_r.m4])
m4_include([m4/tm_gmtoff.m4])
m4_include([m4/tzset.m4])
m4_include([m4/ulonglong.m4])
m4_include([m4/unlocked-io.m4])
m4_include([m4/vsnprintf.m4])
m4_include([m4/wchar_t.m4])
m4_include([m4/wcwidth.m4])
m4_include([m4/wint_t.m4])
m4_include([m4/xalloc.m4])
m4_include([m4/xgetcwd.m4])
m4_include([m4/xreadlink.m4])
m4_include([m4/xsize.m4])
m4_include([m4/xstrndup.m4])