]> ncurses.scripts.mit.edu Git - ncurses.git/blobdiff - test/aclocal.m4
ncurses 6.2 - patch 20210619
[ncurses.git] / test / aclocal.m4
index d3a395f190860e00ef44a9f170e1071b89f4b822..b48e6ba2a2e4a097082fdeb44b95904bfa5ef87c 100644 (file)
@@ -1,5 +1,5 @@
 dnl***************************************************************************
-dnl Copyright 2018-2019,2020 Thomas E. Dickey                                *
+dnl Copyright 2018-2020,2021 Thomas E. Dickey                                *
 dnl Copyright 2003-2017,2018 Free Software Foundation, Inc.                  *
 dnl                                                                          *
 dnl Permission is hereby granted, free of charge, to any person obtaining a  *
@@ -27,7 +27,7 @@ dnl sale, use or other dealings in this Software without prior written       *
 dnl authorization.                                                           *
 dnl***************************************************************************
 dnl
-dnl $Id: aclocal.m4,v 1.177 2020/02/27 10:21:59 tom Exp $
+dnl $Id: aclocal.m4,v 1.195 2021/06/19 23:43:02 tom Exp $
 dnl
 dnl Author: Thomas E. Dickey
 dnl
@@ -43,7 +43,7 @@ dnl           https://invisible-island.net/autoconf/my-autoconf.html
 dnl
 dnl ---------------------------------------------------------------------------
 dnl ---------------------------------------------------------------------------
-dnl AM_LANGINFO_CODESET version: 4 updated: 2015/04/18 08:56:57
+dnl AM_LANGINFO_CODESET version: 6 updated: 2021/01/01 16:53:59
 dnl -------------------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -56,11 +56,11 @@ AC_DEFUN([AM_LANGINFO_CODESET],
 [
 AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
        [AC_TRY_LINK([#include <langinfo.h>],
-       [char* cs = nl_langinfo(CODESET);],
+       [char* cs = nl_langinfo(CODESET); (void)cs],
        am_cv_langinfo_codeset=yes,
        am_cv_langinfo_codeset=no)
        ])
-       if test $am_cv_langinfo_codeset = yes; then
+       if test "$am_cv_langinfo_codeset" = yes; then
                AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
                [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
        fi
@@ -92,10 +92,11 @@ define([CF_ACVERSION_COMPARE],
 [ifelse([$8], , ,[$8])],
 [ifelse([$9], , ,[$9])])])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_CFLAGS version: 13 updated: 2017/02/25 18:57:40
+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 The second parameter if given makes this macro verbose.
+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
@@ -109,19 +110,19 @@ cf_new_extra_cppflags=
 
 for cf_add_cflags in $1
 do
-case $cf_fix_cppflags in
+case "$cf_fix_cppflags" in
 (no)
-       case $cf_add_cflags in
+       case "$cf_add_cflags" in
        (-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
-               case $cf_add_cflags in
+               case "$cf_add_cflags" in
                (-D*)
-                       cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`
+                       cf_tst_cflags=`echo "${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 $cf_fix_cppflags = yes ; then
+                       if test "$cf_fix_cppflags" = yes ; then
                                CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
                                continue
                        elif test "${cf_tst_cflags}" = "\"'" ; then
@@ -134,7 +135,7 @@ case $cf_fix_cppflags in
                (*$cf_add_cflags)
                        ;;
                (*)
-                       case $cf_add_cflags in
+                       case "$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)
@@ -152,7 +153,7 @@ case $cf_fix_cppflags in
 (yes)
        CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
 
-       cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^[[^"]]*"'\''//'`
+       cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^[[^"]]*"'\''//'`
 
        test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
                && test -z "${cf_tst_cflags}" \
@@ -180,7 +181,7 @@ AC_SUBST(EXTRA_CPPFLAGS)
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_INCDIR version: 15 updated: 2018/06/20 20:23:13
+dnl CF_ADD_INCDIR version: 16 updated: 2020/12/31 20:19:42
 dnl -------------
 dnl Add an include-directory to $CPPFLAGS.  Don't add /usr/include, since it's
 dnl redundant.  We don't normally need to add -I/usr/local/include for gcc,
@@ -192,9 +193,9 @@ AC_DEFUN([CF_ADD_INCDIR],
 if test -n "$1" ; then
   for cf_add_incdir in $1
   do
-       while test $cf_add_incdir != /usr/include
+       while test "$cf_add_incdir" != /usr/include
        do
-         if test -d $cf_add_incdir
+         if test -d "$cf_add_incdir"
          then
                cf_have_incdir=no
                if test -n "$CFLAGS$CPPFLAGS" ; then
@@ -225,7 +226,7 @@ if test -n "$1" ; 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%'`
+                 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
@@ -247,7 +248,7 @@ dnl $1 = library to add, without the "-l"
 dnl $2 = variable to update (default $LIBS)
 AC_DEFUN([CF_ADD_LIB],[CF_ADD_LIBS(-l$1,ifelse($2,,LIBS,[$2]))])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_LIBDIR version: 10 updated: 2015/04/18 08:56:57
+dnl CF_ADD_LIBDIR version: 11 updated: 2020/12/31 20:19:42
 dnl -------------
 dnl    Adds to the library-path
 dnl
@@ -261,9 +262,9 @@ AC_DEFUN([CF_ADD_LIBDIR],
 if test -n "$1" ; then
        for cf_add_libdir in $1
        do
-               if test $cf_add_libdir = /usr/lib ; then
+               if test "$cf_add_libdir" = /usr/lib ; then
                        :
-               elif test -d $cf_add_libdir
+               elif test -d "$cf_add_libdir"
                then
                        cf_have_libdir=no
                        if test -n "$LDFLAGS$LIBS" ; then
@@ -322,7 +323,7 @@ LIBS=`echo "$LIBS" | sed -e "s/[[   ]][[    ]]*/ /g" -e "s%$1 %$1 $2 %" -e 's%  % %
 CF_VERBOSE(...after  $LIBS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_SUBDIR_PATH version: 4 updated: 2013/10/08 17:47:05
+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
@@ -334,13 +335,13 @@ 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") &&]) {
+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"
+       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 ---------------------------------------------------------------------------
@@ -389,7 +390,46 @@ ifelse([$3],,[    :]dnl
 ])dnl
 ])])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CC_ENV_FLAGS version: 9 updated: 2018/07/29 18:03:26
+dnl CF_C11_NORETURN version: 3 updated: 2021/03/28 11:36:23
+dnl ---------------
+AC_DEFUN([CF_C11_NORETURN],
+[
+AC_MSG_CHECKING(if you want to use C11 _Noreturn feature)
+CF_ARG_ENABLE(stdnoreturn,
+       [  --enable-stdnoreturn    enable C11 _Noreturn feature for diagnostics],
+       [enable_stdnoreturn=yes],
+       [enable_stdnoreturn=no])
+AC_MSG_RESULT($enable_stdnoreturn)
+
+if test $enable_stdnoreturn = yes; then
+AC_CACHE_CHECK([for C11 _Noreturn feature], cf_cv_c11_noreturn,
+       [AC_TRY_COMPILE([
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdnoreturn.h>
+static _Noreturn void giveup(void) { exit(0); }
+       ],
+       [if (feof(stdin)) giveup()],
+       cf_cv_c11_noreturn=yes,
+       cf_cv_c11_noreturn=no)
+       ])
+else
+       cf_cv_c11_noreturn=no,
+fi
+
+if test "$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: 10 updated: 2020/12/31 18:40:20
 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
@@ -404,7 +444,7 @@ dnl outweighs that limitation.
 AC_DEFUN([CF_CC_ENV_FLAGS],
 [
 # This should have been defined by AC_PROG_CC
-: ${CC:=cc}
+: "${CC:=cc}"
 
 AC_MSG_CHECKING(\$CFLAGS variable)
 case "x$CFLAGS" in
@@ -453,7 +493,7 @@ case "$CC" in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CHECK_CACHE version: 12 updated: 2012/10/02 20:55:03
+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.
@@ -467,7 +507,7 @@ 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 $ac_aux_dir/config.guess ; then
+if test -f "$srcdir/config.guess" || test -f "$ac_aux_dir/config.guess" ; then
        ifelse([$1],,[AC_CANONICAL_HOST],[$1])
        system_name="$host_os"
 else
@@ -488,7 +528,7 @@ if test ".$system_name" != ".$cf_cv_system_name" ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CHECK_CFLAGS version: 3 updated: 2014/07/22 05:32:57
+dnl CF_CHECK_CFLAGS version: 4 updated: 2021/01/02 19:22:58
 dnl ---------------
 dnl Conditionally add to $CFLAGS and $CPPFLAGS values which are derived from
 dnl a build-configuration such as imake.  These have the pitfall that they
@@ -506,11 +546,11 @@ AC_TRY_LINK([#include <stdio.h>],[printf("Hello world");],,
         if test "x$cf_check_cppflags" != "x$CPPFLAGS" ; then
                 CF_VERBOSE(but keeping change to \$CPPFLAGS)
         fi
-        CFLAGS="$cf_check_flags"])
+        CFLAGS="$cf_check_cflags"])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CHECK_CURSES_LIB version: 2 updated: 2018/01/03 04:47:33
+dnl CF_CHECK_CURSES_LIB version: 3 updated: 2021/01/04 19:45:09
 dnl -------------------
 dnl $1 = nominal library name, used also for header lookup
 dnl $2 = suffix to append to library name
@@ -527,7 +567,7 @@ if test "x${NCURSES_CONFIG_PKG}" = xnone; then
        :
 elif test "x${PKG_CONFIG:=none}" != xnone; then
        AC_MSG_CHECKING(pkg-config for $1$2)
-       if "$PKG_CONFIG" --exists $1$2 ; then
+       if "$PKG_CONFIG" --exists "$1$2" ; then
                AC_MSG_RESULT(yes)
 
                AC_MSG_CHECKING(if the $1$2 package files work)
@@ -535,8 +575,8 @@ elif test "x${PKG_CONFIG:=none}" != xnone; then
                cf_save_CPPFLAGS="$CPPFLAGS"
                cf_save_LIBS="$LIBS"
 
-               CF_ADD_CFLAGS(`$PKG_CONFIG --cflags $1$2`)
-               CF_ADD_LIBS(`$PKG_CONFIG --libs $1$2`)
+               CF_ADD_CFLAGS(`$PKG_CONFIG --cflags "$1$2"`)
+               CF_ADD_LIBS(`$PKG_CONFIG --libs "$1$2"`)
 
                AC_TRY_LINK([#include <$1.h>],
                        [(void) $3 ( ]ifelse([$4],,,[[$4]])[ );],
@@ -567,7 +607,7 @@ if test "$cf_have_curses_lib" = no; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CLANG_COMPILER version: 2 updated: 2013/11/19 19:23:35
+dnl CF_CLANG_COMPILER version: 8 updated: 2021/01/01 13:31:04
 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
@@ -586,21 +626,56 @@ ifelse([$2],,CLANG_COMPILER,[$2])=no
 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
        AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
        cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
-       ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -Qunused-arguments"
        AC_TRY_COMPILE([],[
 #ifdef __clang__
 #else
 make an error
 #endif
 ],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
-cf_save_CFLAGS="$cf_save_CFLAGS -Qunused-arguments"
 ],[])
        ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
        AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
 fi
+
+CLANG_VERSION=none
+
+if test "x$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: 3 updated: 2020/01/11 18:39:22
+dnl CF_CONST_X_STRING version: 7 updated: 2021/06/07 17:39:17
 dnl -----------------
 dnl The X11R4-X11R6 Xt specification uses an ambiguous String type for most
 dnl character-strings.
@@ -612,7 +687,7 @@ 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 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
@@ -630,7 +705,7 @@ AC_TRY_COMPILE(
 #include <stdlib.h>
 #include <X11/Intrinsic.h>
 ],
-[String foo = malloc(1)],[
+[String foo = malloc(1); free((void*)foo)],[
 
 AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
        AC_TRY_COMPILE(
@@ -648,7 +723,7 @@ AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
 
 CF_RESTORE_XTRA_FLAGS([CF_CONST_X_STRING])
 
-case $cf_cv_const_x_string in
+case "$cf_cv_const_x_string" in
 (no)
        CF_APPEND_TEXT(CPPFLAGS,-DXTSTRINGDEFINES)
        ;;
@@ -660,7 +735,7 @@ esac
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_ACS_MAP version: 7 updated: 2012/10/06 16:39:58
+dnl CF_CURSES_ACS_MAP version: 8 updated: 2021/01/04 19:45:09
 dnl -----------------
 dnl Check for likely values of acs_map[]:
 AC_DEFUN([CF_CURSES_ACS_MAP],
@@ -673,7 +748,7 @@ do
 AC_TRY_LINK([
 #include <${cf_cv_ncurses_header:-curses.h}>
 ],[
-$name['k'] = ACS_PLUS
+${name}['k'] = ACS_PLUS
 ],[cf_cv_curses_acs_map=$name; break])
 done
 ])
@@ -681,7 +756,7 @@ done
 test "$cf_cv_curses_acs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_ACS_ARRAY,$cf_cv_curses_acs_map,[Define as needed to override ncurses prefix _nc_])
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_CHECK_DATA version: 9 updated: 2020/02/08 21:00:26
+dnl CF_CURSES_CHECK_DATA version: 10 updated: 2021/01/04 19:45:09
 dnl --------------------
 dnl Check if curses.h defines the given data/variable.
 dnl Use this after CF_NCURSES_CONFIG or CF_CURSES_CONFIG.
@@ -700,7 +775,7 @@ CF__CURSES_DATA(foo,$cf_data)
 ],[cf_result=no])
 AC_MSG_RESULT($cf_result)
 
-if test $cf_result = yes ; then
+if test "$cf_result" = yes ; then
        CF_UPPER(cf_result,have_curses_data_$cf_data)
        AC_DEFINE_UNQUOTED($cf_result)
        ifelse($2,,,[$2])
@@ -726,7 +801,7 @@ int main(void)
 ],[cf_result=yes],[cf_result=no])
 ])
        AC_MSG_RESULT($cf_result)
-       if test $cf_result = yes ; then
+       if test "$cf_result" = yes ; then
                CF_UPPER(cf_result,decl_curses_data_$cf_data)
                AC_DEFINE_UNQUOTED($cf_result)
                # do not exit loop here, since we prefer system's declarations
@@ -735,7 +810,7 @@ fi
 done
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_CHECK_TYPE version: 4 updated: 2012/10/06 16:39:58
+dnl CF_CURSES_CHECK_TYPE version: 5 updated: 2021/01/04 19:45:09
 dnl --------------------
 dnl Check if curses.h defines the given type
 AC_DEFUN([CF_CURSES_CHECK_TYPE],
@@ -749,7 +824,7 @@ AC_TRY_COMPILE([
 $1 foo
 ],cf_result=yes,cf_result=no)
 AC_MSG_RESULT($cf_result)
-if test $cf_result = yes ; then
+if test "$cf_result" = yes ; then
        CF_UPPER(cf_result,have_type_$1)
        AC_DEFINE_UNQUOTED($cf_result,1,[Define to 1 if we have type $1])
 else
@@ -769,14 +844,14 @@ CF_NCURSES_VERSION
 CF_CURSES_LIBS
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_CPPFLAGS version: 13 updated: 2018/06/20 20:23:13
+dnl CF_CURSES_CPPFLAGS version: 14 updated: 2021/01/02 09:31:20
 dnl ------------------
 dnl Look for the curses headers.
 AC_DEFUN([CF_CURSES_CPPFLAGS],[
 
 AC_CACHE_CHECK(for extra include directories,cf_cv_curses_incdir,[
 cf_cv_curses_incdir=no
-case $host_os in
+case "$host_os" in
 (hpux10.*)
        if test "x$cf_cv_screen" = "xcurses_colr"
        then
@@ -803,7 +878,7 @@ CF_CURSES_HEADER
 CF_TERM_HEADER
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_FUNCS version: 19 updated: 2018/01/03 04:47:33
+dnl CF_CURSES_FUNCS version: 20 updated: 2020/12/31 20:19:42
 dnl ---------------
 dnl Curses-functions are a little complicated, since a lot of them are macros.
 AC_DEFUN([CF_CURSES_FUNCS],
@@ -824,7 +899,7 @@ do
                        [
 #ifndef ${cf_func}
 long foo = (long)(&${cf_func});
-fprintf(stderr, "testing linkage of $cf_func:%p\n", (void *)foo);
+fprintf(stderr, "testing linkage of $cf_func:%p\\n", (void *)foo);
 if (foo + 1234L > 5678L)
        ${cf_cv_main_return:-return}(foo != 0);
 #endif
@@ -832,12 +907,12 @@ if (foo + 1234L > 5678L)
                        [cf_result=yes],
                        [cf_result=no])
                fi
-               eval 'cf_cv_func_'$cf_func'=$cf_result'
+               eval 'cf_cv_func_'$cf_func'="$cf_result"'
        ])
        # use the computed/retrieved cache-value:
        eval 'cf_result=$cf_cv_func_'$cf_func
        AC_MSG_RESULT($cf_result)
-       if test $cf_result != no; then
+       if test "$cf_result" != no; then
                AC_DEFINE_UNQUOTED(HAVE_${cf_tr_func})
        fi
 done
@@ -870,7 +945,7 @@ fi
 AC_CHECK_HEADERS($cf_cv_ncurses_header)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_LIBS version: 42 updated: 2018/06/20 20:23:13
+dnl CF_CURSES_LIBS version: 44 updated: 2021/01/02 09:31:20
 dnl --------------
 dnl Look for the curses libraries.  Older curses implementations may require
 dnl termcap/termlib to be linked as well.  Call CF_CURSES_CPPFLAGS first.
@@ -885,7 +960,7 @@ AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
 AC_MSG_RESULT($cf_result)
 
 if test "$cf_result" = no ; then
-case $host_os in
+case "$host_os" in
 (freebsd*)
        AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
        ;;
@@ -953,7 +1028,7 @@ if test ".$ac_cv_func_initscr" != .yes ; then
                        for cf_term_lib in $cf_check_list otermcap termcap tinfo termlib unknown
                        do
                                AC_CHECK_LIB($cf_term_lib,tgoto,[
-                                       : ${cf_nculib_root:=$cf_term_lib}
+                                       : "${cf_nculib_root:=$cf_term_lib}"
                                        break
                                ])
                        done
@@ -974,7 +1049,7 @@ if test ".$ac_cv_func_initscr" != .yes ; then
                                        [cf_result=yes],
                                        [cf_result=no])
                                AC_MSG_RESULT($cf_result)
-                               test $cf_result = yes && break
+                               test "$cf_result" = yes && break
                        elif test "$cf_curs_lib" = "$cf_term_lib" ; then
                                cf_result=no
                        elif test "$cf_term_lib" != predefined ; then
@@ -990,17 +1065,17 @@ if test ".$ac_cv_func_initscr" != .yes ; then
                                                [cf_result=error])
                                        ])
                                AC_MSG_RESULT($cf_result)
-                               test $cf_result != error && break
+                               test "$cf_result" != error && break
                        fi
                done
        fi
-       test $cf_curs_lib = unknown && AC_MSG_ERROR(no curses library found)
+       test "$cf_curs_lib" = unknown && AC_MSG_ERROR(no curses library found)
 fi
 fi
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_TERM_H version: 11 updated: 2015/04/15 19:08:48
+dnl CF_CURSES_TERM_H version: 15 updated: 2021/01/02 09:31:20
 dnl ----------------
 dnl SVr4 curses should have term.h as well (where it puts the definitions of
 dnl the low-level interface).  This may not be true in old/broken implementations,
@@ -1017,9 +1092,9 @@ AC_CACHE_CHECK(for term.h, cf_cv_term_header,[
 
 cf_header_list="term.h ncurses/term.h ncursesw/term.h"
 
-case ${cf_cv_ncurses_header:-curses.h} in
+case "${cf_cv_ncurses_header:-curses.h}" in
 (*/*)
-       cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`term.h
+       cf_header_item=`echo "${cf_cv_ncurses_header:-curses.h}" | sed -e 's%\..*%%' -e 's%/.*%/%'`term.h
        cf_header_list="$cf_header_item $cf_header_list"
        ;;
 esac
@@ -1029,13 +1104,13 @@ do
        AC_TRY_COMPILE([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <${cf_header}>],
-       [WINDOW *x],
+       [WINDOW *x; (void)x],
        [cf_cv_term_header=$cf_header
         break],
        [cf_cv_term_header=no])
 done
 
-case $cf_cv_term_header in
+case "$cf_cv_term_header" in
 (no)
        # If curses is ncurses, some packagers still mess it up by trying to make
        # us use GNU termcap.  This handles the most common case.
@@ -1048,7 +1123,7 @@ case $cf_cv_term_header in
 #else
 make an error
 #endif],
-                       [WINDOW *x],
+                       [WINDOW *x; (void)x],
                        [cf_cv_term_header=$cf_header
                         break],
                        [cf_cv_term_header=no])
@@ -1057,7 +1132,7 @@ make an error
 esac
 ])
 
-case $cf_cv_term_header in
+case "$cf_cv_term_header" in
 (term.h)
        AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
        ;;
@@ -1070,7 +1145,7 @@ case $cf_cv_term_header in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_UNCTRL_H version: 4 updated: 2015/04/15 19:08:48
+dnl CF_CURSES_UNCTRL_H version: 8 updated: 2021/01/02 09:31:20
 dnl ------------------
 dnl Any X/Open curses implementation must have unctrl.h, but ncurses packages
 dnl may put it in a subdirectory (along with ncurses' other headers, of
@@ -1087,9 +1162,9 @@ AC_CACHE_CHECK(for unctrl.h, cf_cv_unctrl_header,[
 
 cf_header_list="unctrl.h ncurses/unctrl.h ncursesw/unctrl.h"
 
-case ${cf_cv_ncurses_header:-curses.h} in
+case "${cf_cv_ncurses_header:-curses.h}" in
 (*/*)
-       cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`unctrl.h
+       cf_header_item=`echo "${cf_cv_ncurses_header:-curses.h}" | sed -e 's%\..*%%' -e 's%/.*%/%'`unctrl.h
        cf_header_list="$cf_header_item $cf_header_list"
        ;;
 esac
@@ -1099,20 +1174,20 @@ do
        AC_TRY_COMPILE([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <${cf_header}>],
-       [WINDOW *x],
+       [WINDOW *x; (void)x],
        [cf_cv_unctrl_header=$cf_header
         break],
        [cf_cv_unctrl_header=no])
 done
 ])
 
-case $cf_cv_unctrl_header in
+case "$cf_cv_unctrl_header" in
 (no)
        AC_MSG_WARN(unctrl.h header not found)
        ;;
 esac
 
-case $cf_cv_unctrl_header in
+case "$cf_cv_unctrl_header" in
 (unctrl.h)
        AC_DEFINE(HAVE_UNCTRL_H,1,[Define to 1 if we have unctrl.h])
        ;;
@@ -1125,7 +1200,7 @@ case $cf_cv_unctrl_header in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_WACS_MAP version: 6 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_WACS_MAP version: 8 updated: 2021/01/04 19:45:09
 dnl ------------------
 dnl Check for likely values of wacs_map[].
 AC_DEFUN([CF_CURSES_WACS_MAP],
@@ -1139,7 +1214,7 @@ AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
 #define _XOPEN_SOURCE_EXTENDED
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
-       [void *foo = &($name['k'])],
+       [void *foo = &(${name}['k']); (void)foo],
        [cf_cv_curses_wacs_map=$name
         break])
        done])
@@ -1147,7 +1222,7 @@ AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
 test "$cf_cv_curses_wacs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_WACS_ARRAY,$cf_cv_curses_wacs_map,[Define to name of (n)curses wide-character array])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_WACS_SYMBOLS version: 2 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_WACS_SYMBOLS version: 4 updated: 2021/01/04 19:45:09
 dnl ----------------------
 dnl Do a check to see if the WACS_xxx constants are defined compatibly with
 dnl X/Open Curses.  In particular, NetBSD's implementation of the WACS_xxx
@@ -1166,7 +1241,7 @@ then
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
        [cchar_t *foo = WACS_PLUS;
-        $cf_cv_curses_wacs_map['k'] = *WACS_PLUS],
+        ${cf_cv_curses_wacs_map}['k'] = *WACS_PLUS; (void)foo],
        [cf_cv_curses_wacs_symbols=yes])
 else
        AC_TRY_LINK([
@@ -1174,7 +1249,7 @@ else
 #define _XOPEN_SOURCE_EXTENDED
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
-       [cchar_t *foo = WACS_PLUS],
+       [cchar_t *foo = WACS_PLUS; (void)foo],
        [cf_cv_curses_wacs_symbols=yes])
 fi
 ])
@@ -1182,10 +1257,10 @@ fi
 test "$cf_cv_curses_wacs_symbols" != no && AC_DEFINE(CURSES_WACS_SYMBOLS,1,[Define to 1 if (n)curses supports wide-character WACS_ symbols])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_DIRNAME version: 4 updated: 2002/12/21 19:25:52
+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
+AC_DEFUN([CF_DIRNAME],[$1=`echo "$2" | sed -e 's%/[[^/]]*$%%'`])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_DISABLE_ECHO version: 13 updated: 2015/04/18 08:56:57
 dnl ---------------
@@ -1224,7 +1299,7 @@ AC_SUBST(SHOW_CC)
 AC_SUBST(ECHO_CC)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_DISABLE_LEAKS version: 7 updated: 2012/10/02 20:55:03
+dnl CF_DISABLE_LEAKS version: 9 updated: 2021/04/03 16:41:50
 dnl ----------------
 dnl Combine no-leak checks with the libraries or tools that are used for the
 dnl checks.
@@ -1237,17 +1312,19 @@ AC_REQUIRE([CF_WITH_VALGRIND])
 AC_MSG_CHECKING(if you want to perform memory-leak testing)
 AC_ARG_ENABLE(leaks,
        [  --disable-leaks         test: free permanent memory, analyze leaks],
-       [if test "x$enableval" = xno; then with_no_leaks=yes; else with_no_leaks=no; fi],
-       : ${with_no_leaks:=no})
+       [enable_leaks=$enableval],
+       [enable_leaks=yes])
+dnl with_no_leaks is more readable...
+if test "x$enable_leaks" = xno; then with_no_leaks=yes; else with_no_leaks=no; fi
 AC_MSG_RESULT($with_no_leaks)
 
-if test "$with_no_leaks" = yes ; then
+if test "$enable_leaks" = no ; then
        AC_DEFINE(NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
        AC_DEFINE(YY_NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_DISABLE_RPATH_HACK version: 2 updated: 2011/02/13 13:31:33
+dnl CF_DISABLE_RPATH_HACK version: 3 updated: 2021/01/05 20:14:44
 dnl ---------------------
 dnl The rpath-hack makes it simpler to build programs, particularly with the
 dnl *BSD ports which may have essential libraries in unusual places.  But it
@@ -1258,15 +1335,18 @@ AC_DEFUN([CF_DISABLE_RPATH_HACK],
 AC_MSG_CHECKING(if rpath-hack should be disabled)
 CF_ARG_DISABLE(rpath-hack,
        [  --disable-rpath-hack    don't add rpath options for additional libraries],
-       [cf_disable_rpath_hack=yes],
-       [cf_disable_rpath_hack=no])
+       [enable_rpath_hack=no],
+       [enable_rpath_hack=yes])
+dnl TODO - drop cf_disable_rpath_hack
+if test "x$enable_rpath_hack" = xno; then cf_disable_rpath_hack=yes; else cf_disable_rpath_hack=no; fi
 AC_MSG_RESULT($cf_disable_rpath_hack)
-if test "$cf_disable_rpath_hack" = no ; then
+
+if test "$enable_rpath_hack" = yes ; then
        CF_RPATH_HACK
 fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_ENABLE_STRING_HACKS version: 5 updated: 2016/10/08 17:34:11
+dnl CF_ENABLE_STRING_HACKS version: 6 updated: 2021/01/05 19:23:48
 dnl ----------------------
 dnl On a few platforms, the compiler and/or loader nags with untruthful
 dnl comments stating that "most" uses of strcat/strcpy/sprintf are incorrect,
@@ -1286,11 +1366,11 @@ AC_DEFUN([CF_ENABLE_STRING_HACKS],
 AC_MSG_CHECKING(if you want to work around bogus compiler/loader warnings)
 AC_ARG_ENABLE(string-hacks,
        [  --enable-string-hacks   work around bogus compiler/loader warnings],
-       [with_string_hacks=$enableval],
-       [with_string_hacks=no])
-AC_MSG_RESULT($with_string_hacks)
+       [enable_string_hacks=$enableval],
+       [enable_string_hacks=no])
+AC_MSG_RESULT($enable_string_hacks)
 
-if test "x$with_string_hacks" = "xyes"; then
+if test "x$enable_string_hacks" = "xyes"; then
        AC_DEFINE(USE_STRING_HACKS,1,[Define to 1 to work around bogus compiler/loader warnings])
        AC_MSG_WARN(enabling string-hacks to work around bogus compiler/loader warnings)
        AC_CHECK_FUNC(strlcat,[
@@ -1306,27 +1386,37 @@ if test "x$with_string_hacks" = "xyes"; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ENABLE_WARNINGS version: 5 updated: 2017/09/29 20:01:16
+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 "$GXX" = yes )
+if test "$GCC" = yes || test "$GXX" = yes
 then
+CF_FIX_WARNINGS(CFLAGS)
+CF_FIX_WARNINGS(CPPFLAGS)
+CF_FIX_WARNINGS(LDFLAGS)
 AC_MSG_CHECKING(if you want to turn on gcc warnings)
 CF_ARG_ENABLE(warnings,
        [  --enable-warnings       test: turn on gcc compiler warnings],
-       [with_warnings=yes],
-       [with_warnings=no])
-AC_MSG_RESULT($with_warnings)
-if test "$with_warnings" = "yes"
+       [enable_warnings=yes],
+       [enable_warnings=no])
+AC_MSG_RESULT($enable_warnings)
+if test "$enable_warnings" = "yes"
 then
-       CF_GCC_ATTRIBUTES
+       ifelse($2,,[CF_GCC_ATTRIBUTES])
        CF_GCC_WARNINGS($1)
 fi
+ifelse($2,yes,[CF_GCC_ATTRIBUTES])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_FIND_LIBRARY version: 9 updated: 2008/03/23 14:48:54
+dnl CF_FIND_LIBRARY version: 11 updated: 2021/01/02 09:31:20
 dnl ---------------
 dnl Look for a non-standard library, given parameters for AC_TRY_LINK.  We
 dnl prefer a standard location, and use -L options only if we do not find the
@@ -1342,16 +1432,16 @@ dnl Sets the variable "$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'
+       eval 'cf_cv_have_lib_'"$1"'=no'
        cf_libdir=""
        AC_CHECK_FUNC($5,
-               eval 'cf_cv_have_lib_'$1'=yes',[
+               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'
+                        eval 'cf_cv_have_lib_'"$1"'=yes'
                        ],
                        [AC_MSG_RESULT(no)
                        CF_LIBRARY_PATH(cf_search,$2)
@@ -1361,22 +1451,22 @@ AC_DEFUN([CF_FIND_LIBRARY],
                                LIBS="-L$cf_libdir -l$1 $cf_save_LIBS"
                                AC_TRY_LINK([$3],[$4],
                                        [AC_MSG_RESULT(yes)
-                                        eval 'cf_cv_have_lib_'$1'=yes'
+                                        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_'$1
+eval 'cf_found_library="[$]cf_cv_have_lib_'"$1"\"
 ifelse($6,,[
-if test $cf_found_library = no ; then
+if test "$cf_found_library" = no ; then
        AC_MSG_ERROR(Cannot link $1 library)
 fi
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_FIND_LINKAGE version: 21 updated: 2018/06/20 20:23:13
+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.
@@ -1433,7 +1523,7 @@ AC_TRY_LINK([$1],[$2],[
        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_$3 ; then
+               if test -d "$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)
@@ -1468,7 +1558,7 @@ AC_TRY_LINK([$1],[$2],[
                        CF_LIBRARY_PATH(cf_search,$3)
                        for cf_cv_library_path_$3 in $cf_search
                        do
-                               if test -d $cf_cv_library_path_$3 ; then
+                               if test -d "$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"
@@ -1507,7 +1597,41 @@ ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_FUNC_CURSES_VERSION version: 7 updated: 2017/05/10 18:31:29
+dnl CF_FIX_WARNINGS version: 3 updated: 2020/12/31 18:40:20
+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_VERBOSE(repairing $1: [$]$1)
+               cf_temp_flags=
+               for cf_temp_scan in [$]$1
+               do
+                       case "x$cf_temp_scan" in
+                       (x-Werror=*)
+                               CF_APPEND_TEXT(EXTRA_CFLAGS,$cf_temp_scan)
+                               ;;
+                       (*)
+                               CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
+                               ;;
+                       esac
+               done
+               $1="$cf_temp_flags"
+               CF_VERBOSE(... fixed [$]$1)
+               CF_VERBOSE(... extra $EXTRA_CFLAGS)
+               ;;
+       esac
+fi
+AC_SUBST(EXTRA_CFLAGS)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FUNC_CURSES_VERSION version: 8 updated: 2021/01/02 09:31:20
 dnl ----------------------
 dnl Solaris has a data item 'curses_version', which confuses AC_CHECK_FUNCS.
 dnl It's a character string "SVR4", not documented.
@@ -1519,7 +1643,7 @@ AC_TRY_RUN([
 int main(void)
 {
        char temp[1024];
-       sprintf(temp, "%s\n", curses_version());
+       sprintf(temp, "%s\\n", curses_version());
        ${cf_cv_main_return:-return}(0);
 }]
 ,[cf_cv_func_curses_version=yes]
@@ -1529,7 +1653,7 @@ rm -f core])
 test "$cf_cv_func_curses_version" = yes && AC_DEFINE(HAVE_CURSES_VERSION,1,[Define to 1 if we have curses_version function])
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_FUNC_OPENPTY version: 5 updated: 2015/09/12 14:46:50
+dnl CF_FUNC_OPENPTY version: 6 updated: 2021/01/01 13:31:04
 dnl ---------------
 dnl Check for openpty() function, along with <pty.h> header.  It may need the
 dnl "util" library as well.
@@ -1538,7 +1662,7 @@ AC_DEFUN([CF_FUNC_OPENPTY],
 AC_CHECK_LIB(util,openpty,cf_cv_lib_util=yes,cf_cv_lib_util=no)
 AC_CACHE_CHECK(for openpty header,cf_cv_func_openpty,[
        cf_save_LIBS="$LIBS"
-       test $cf_cv_lib_util = yes && { CF_ADD_LIB(util) }
+       test "$cf_cv_lib_util" = yes && { CF_ADD_LIB(util) }
        for cf_header in pty.h libutil.h util.h
        do
        AC_TRY_LINK([
@@ -1557,14 +1681,16 @@ AC_CACHE_CHECK(for openpty header,cf_cv_func_openpty,[
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_ATTRIBUTES version: 17 updated: 2015/04/12 15:39:00
+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],
-[
-if test "$GCC" = yes
+[AC_REQUIRE([AC_PROG_FGREP])dnl
+AC_REQUIRE([CF_C11_NORETURN])dnl
+
+if test "$GCC" = yes || test "$GXX" = yes
 then
 cat > conftest.i <<EOF
 #ifndef GCC_PRINTF
@@ -1583,7 +1709,7 @@ EOF
 if test "$GCC" = yes
 then
        AC_CHECKING([for $CC __attribute__ directives])
-cat > conftest.$ac_ext <<EOF
+cat > "conftest.$ac_ext" <<EOF
 #line __oline__ "${as_me:-configure}"
 #include "confdefs.h"
 #include "conftest.h"
@@ -1599,9 +1725,9 @@ cat > conftest.$ac_ext <<EOF
 #define GCC_SCANFLIKE(fmt,var)  /*nothing*/
 #endif
 extern void wow(char *,...) GCC_SCANFLIKE(1,2);
-extern void oops(char *,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
-extern void foo(void) GCC_NORETURN;
-int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { return 0; }
+extern GCC_NORETURN void oops(char *,...) GCC_PRINTFLIKE(1,2);
+extern GCC_NORETURN void foo(void);
+int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
 EOF
        cf_printf_attribute=no
        cf_scanf_attribute=no
@@ -1611,7 +1737,7 @@ EOF
                cf_directive="__attribute__(($cf_attribute))"
                echo "checking for $CC $cf_directive" 1>&AC_FD_CC
 
-               case $cf_attribute in
+               case "$cf_attribute" in
                (printf)
                        cf_printf_attribute=yes
                        cat >conftest.h <<EOF
@@ -1634,7 +1760,7 @@ EOF
                if AC_TRY_EVAL(ac_compile); then
                        test -n "$verbose" && AC_MSG_RESULT(... $cf_attribute)
                        cat conftest.h >>confdefs.h
-                       case $cf_attribute in
+                       case "$cf_attribute" in
                        (noreturn)
                                AC_DEFINE_UNQUOTED(GCC_NORETURN,$cf_directive,[Define to noreturn-attribute for gcc])
                                ;;
@@ -1661,9 +1787,9 @@ EOF
                fi
        done
 else
-       fgrep define conftest.i >>confdefs.h
+       ${FGREP-fgrep} define conftest.i >>confdefs.h
 fi
-rm -rf conftest*
+rm -rf ./conftest*
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
@@ -1684,7 +1810,7 @@ CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
 CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_WARNINGS version: 37 updated: 2020/01/05 20:04:12
+dnl CF_GCC_WARNINGS version: 41 updated: 2021/01/01 16:53:59
 dnl ---------------
 dnl Check if the compiler supports useful warning options.  There's a few that
 dnl we don't use, simply because they're too noisy:
@@ -1708,7 +1834,7 @@ AC_DEFUN([CF_GCC_WARNINGS],
 [
 AC_REQUIRE([CF_GCC_VERSION])
 if test "x$have_x" = xyes; then CF_CONST_X_STRING fi
-cat > conftest.$ac_ext <<EOF
+cat > "conftest.$ac_ext" <<EOF
 #line __oline__ "${as_me:-configure}"
 int main(int argc, char *argv[[]]) { return (argv[[argc-1]] == 0) ; }
 EOF
@@ -1727,7 +1853,7 @@ then
 
        AC_CHECKING([for $CC warning options])
        cf_save_CFLAGS="$CFLAGS"
-       EXTRA_CFLAGS="-Wall"
+       EXTRA_CFLAGS="$EXTRA_CFLAGS -Wall"
        for cf_opt in \
                wd1419 \
                wd1683 \
@@ -1750,7 +1876,6 @@ elif test "$GCC" = yes && test "$GCC_VERSION" != "unknown"
 then
        AC_CHECKING([for $CC warning options])
        cf_save_CFLAGS="$CFLAGS"
-       EXTRA_CFLAGS=
        cf_warn_CONST=""
        test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
        cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
@@ -1773,16 +1898,16 @@ then
                CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
                if AC_TRY_EVAL(ac_compile); then
                        test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
-                       case $cf_opt in
+                       case "$cf_opt" in
                        (Winline)
-                               case $GCC_VERSION in
+                               case "$GCC_VERSION" in
                                ([[34]].*)
                                        CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
                                        continue;;
                                esac
                                ;;
                        (Wpointer-arith)
-                               case $GCC_VERSION in
+                               case "$GCC_VERSION" in
                                ([[12]].*)
                                        CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
                                        continue;;
@@ -1794,12 +1919,12 @@ then
        done
        CFLAGS="$cf_save_CFLAGS"
 fi
-rm -rf conftest*
+rm -rf ./conftest*
 
 AC_SUBST(EXTRA_CFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GETOPT_HEADER version: 6 updated: 2014/07/22 14:45:54
+dnl CF_GETOPT_HEADER version: 8 updated: 2021/06/19 19:16:16
 dnl ----------------
 dnl Check for getopt's variables which are commonly defined in stdlib.h,
 dnl unistd.h or (nonstandard) in getopt.h
@@ -1812,15 +1937,15 @@ for cf_header in stdio.h stdlib.h unistd.h getopt.h
 do
 AC_TRY_COMPILE([
 #include <$cf_header>],
-[int x = optind; char *y = optarg],
+[int x = optind; char *y = optarg; (void)x; (void)y],
 [cf_cv_getopt_header=$cf_header
  break])
 done
 ])
-if test $cf_cv_getopt_header != none ; then
+if test "$cf_cv_getopt_header" != none ; then
        AC_DEFINE(HAVE_GETOPT_HEADER,1,[Define to 1 if getopt variables are declared in header])
 fi
-if test $cf_cv_getopt_header = getopt.h ; then
+if test "$cf_cv_getopt_header" = getopt.h ; then
        AC_DEFINE(NEED_GETOPT_H,1,[Define to 1 if we must include getopt.h])
 fi
 ])dnl
@@ -1936,7 +2061,7 @@ if test x$cf_cv_gnu_library = xyes; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_HEADER_PATH version: 13 updated: 2015/04/15 19:08:48
+dnl CF_HEADER_PATH version: 15 updated: 2021/01/01 13:31:04
 dnl --------------
 dnl Construct a search-list of directories for a nonstandard header-file
 dnl
@@ -1952,7 +2077,7 @@ cf_header_path_list=""
 if test -n "${CFLAGS}${CPPFLAGS}" ; then
        for cf_header_path in $CPPFLAGS $CFLAGS
        do
-               case $cf_header_path in
+               case "$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)
@@ -1968,15 +2093,15 @@ 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/$2"
+       test -d "$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/$2"
+       test -d "$oldincludedir"    && $1="[$]$1 $oldincludedir"
+       test -d "$oldincludedir/$2" && $1="[$]$1 $oldincludedir/$2"
 }
 
 $1="[$]$1 $cf_header_path_list"
@@ -2008,7 +2133,7 @@ CF_INSTALL_OPT_P
 CF_INSTALL_OPT_O
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_INSTALL_OPT_O version: 2 updated: 2015/05/15 19:45:35
+dnl CF_INSTALL_OPT_O version: 3 updated: 2020/12/31 20:19:42
 dnl ----------------
 dnl Almost all "install" programs default to the current user's ownership.
 dnl Almost - MINIX is an exception.
@@ -2027,7 +2152,7 @@ esac
 AC_MSG_RESULT($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'`
+       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
@@ -2035,16 +2160,16 @@ fi
 AC_SUBST(INSTALL_OPT_O)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_INSTALL_OPT_P version: 1 updated: 2018/08/18 12:19:21
+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],
 [
-: ${INSTALL:=install}
+: "${INSTALL:=install}"
 AC_CACHE_CHECK(if install accepts -p option, cf_cv_install_p,[
-       rm -rf conftest*
+       rm -rf ./conftest*
        date >conftest.in
        mkdir conftest.out
        sleep 3
@@ -2066,11 +2191,11 @@ AC_CACHE_CHECK(if install accepts -p option, cf_cv_install_p,[
        else
                cf_cv_install_p=no
        fi
-       rm -rf conftest*
+       rm -rf ./conftest*
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_INSTALL_OPT_S version: 2 updated: 2018/08/18 12:19:21
+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.
@@ -2079,11 +2204,11 @@ 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],
-       [with_stripping=no],
-       [with_stripping=yes])
-AC_MSG_RESULT($with_stripping)
+       [enable_stripping=no],
+       [enable_stripping=yes])
+AC_MSG_RESULT($enable_stripping)
 
-if test "$with_stripping" = yes
+if test "$enable_stripping" = yes
 then
        INSTALL_OPT_S="-s"
 else
@@ -2092,7 +2217,7 @@ fi
 AC_SUBST(INSTALL_OPT_S)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_INTEL_COMPILER version: 7 updated: 2015/04/12 15:39:00
+dnl CF_INTEL_COMPILER version: 8 updated: 2021/01/01 16:53:59
 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
@@ -2110,7 +2235,7 @@ AC_REQUIRE([AC_CANONICAL_HOST])
 ifelse([$2],,INTEL_COMPILER,[$2])=no
 
 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
-       case $host_os in
+       case "$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,[$3])"
@@ -2130,7 +2255,7 @@ cf_save_CFLAGS="$cf_save_CFLAGS -we147"
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LD_RPATH_OPT version: 8 updated: 2018/08/18 16:36:35
+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.
@@ -2142,7 +2267,7 @@ LD_RPATH_OPT=
 if test "x$cf_cv_enable_rpath" != xno
 then
        AC_MSG_CHECKING(for an rpath option)
-       case $cf_cv_system_name in
+       case "$cf_cv_system_name" in
        (irix*)
                if test "$GCC" = yes; then
                        LD_RPATH_OPT="-Wl,-rpath,"
@@ -2187,7 +2312,7 @@ then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LIBRARY_PATH version: 10 updated: 2015/04/15 19:08:48
+dnl CF_LIBRARY_PATH version: 11 updated: 2021/01/01 13:31:04
 dnl ---------------
 dnl Construct a search-list of directories for a nonstandard library-file
 dnl
@@ -2201,7 +2326,7 @@ cf_library_path_list=""
 if test -n "${LDFLAGS}${LIBS}" ; then
        for cf_library_path in $LDFLAGS $LIBS
        do
-               case $cf_library_path in
+               case "$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)
@@ -2253,7 +2378,7 @@ AC_SUBST(MAKE_UPPER_TAGS)
 AC_SUBST(MAKE_LOWER_TAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MATH_LIB version: 9 updated: 2017/01/21 11:06:25
+dnl CF_MATH_LIB version: 10 updated: 2020/12/31 18:40:20
 dnl -----------
 dnl Checks for libraries.  At least one UNIX system, Apple Macintosh
 dnl Rhapsody 5.5, does not have -lm.  We cannot use the simpler
@@ -2267,7 +2392,7 @@ AC_CACHE_CHECK(if -lm needed for math functions,
        #include <stdlib.h>
        #include <math.h>
        ],
-       [double x = rand(); printf("result = %g\n", ]ifelse([$2],,sin(x),$2)[)],
+       [double x = rand(); printf("result = %g\\n", ]ifelse([$2],,sin(x),$2)[)],
        [cf_cv_need_libm=no],
        [cf_cv_need_libm=yes])])
 if test "$cf_cv_need_libm" = yes
@@ -2278,7 +2403,7 @@ ifelse($1,,[
 fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_MIXEDCASE_FILENAMES version: 7 updated: 2015/04/12 15:39:00
+dnl CF_MIXEDCASE_FILENAMES version: 9 updated: 2021/01/01 16:53:59
 dnl ----------------------
 dnl Check if the file-system supports mixed-case filenames.  If we're able to
 dnl create a lowercase name and see it as uppercase, it doesn't support that.
@@ -2286,8 +2411,8 @@ AC_DEFUN([CF_MIXEDCASE_FILENAMES],
 [
 AC_CACHE_CHECK(if filesystem supports mixed-case filenames,cf_cv_mixedcase,[
 if test "$cross_compiling" = yes ; then
-       case $target_alias in
-       (*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*)
+       case "$target_alias" in
+       (*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*|darwin*)
                cf_cv_mixedcase=no
                ;;
        (*)
@@ -2316,7 +2441,7 @@ AC_DEFUN([CF_MSG_LOG],[
 echo "${as_me:-configure}:__oline__: testing $* ..." 1>&AC_FD_CC
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CC_CHECK version: 4 updated: 2007/07/29 10:39:05
+dnl CF_NCURSES_CC_CHECK version: 5 updated: 2020/12/31 20:19:42
 dnl -------------------
 dnl Check if we can compile with ncurses' header file
 dnl $1 is the cache variable to set
@@ -2336,10 +2461,10 @@ AC_DEFUN([CF_NCURSES_CC_CHECK],[
        make an error
 #endif
 ])[
-printf("%s\n", NCURSES_VERSION);
+printf("%s\\n", NCURSES_VERSION);
 #else
 #ifdef __NCURSES_H
-printf("old\n");
+printf("old\\n");
 #else
        make an error
 #endif
@@ -2349,7 +2474,7 @@ printf("old\n");
        ,[$1=no])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CONFIG version: 23 updated: 2020/02/27 05:21:59
+dnl CF_NCURSES_CONFIG version: 27 updated: 2021/05/19 19:35:25
 dnl -----------------
 dnl Tie together the configure-script macros for ncurses, preferring these in
 dnl order:
@@ -2375,10 +2500,10 @@ if test "x${PKG_CONFIG:=none}" != xnone; then
                cf_save_CPPFLAGS="$CPPFLAGS"
                cf_save_LIBS="$LIBS"
 
-               cf_pkg_cflags=`$PKG_CONFIG --cflags $cf_ncuconfig_root`
-               cf_pkg_libs=`$PKG_CONFIG --libs $cf_ncuconfig_root`
+               cf_pkg_cflags="`$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". 
+               # 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.
@@ -2388,10 +2513,10 @@ if test "x${PKG_CONFIG:=none}" != xnone; then
                        CF_ADD_LIBS($cf_pkg_libs)
 
                        AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-                               [initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
+                               [initscr(); mousemask(0,0); tigetstr((char *)0);],
                                [AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
                                        int main(void)
-                                       { char *xx = curses_version(); return (xx == 0); }],
+                                       { const char *xx = curses_version(); return (xx == 0); }],
                                        [cf_test_ncuconfig=yes],
                                        [cf_test_ncuconfig=no],
                                        [cf_test_ncuconfig=maybe])],
@@ -2414,10 +2539,10 @@ if test "x${PKG_CONFIG:=none}" != xnone; then
                CF_ADD_LIBS($cf_pkg_libs)
 
                AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-                       [initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
+                       [initscr(); mousemask(0,0); tigetstr((char *)0);],
                        [AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
                                int main(void)
-                               { char *xx = curses_version(); return (xx == 0); }],
+                               { const char *xx = curses_version(); return (xx == 0); }],
                                [cf_have_ncuconfig=yes],
                                [cf_have_ncuconfig=no],
                                [cf_have_ncuconfig=maybe])],
@@ -2466,7 +2591,7 @@ if test "x$cf_have_ncuconfig" = "xno"; then
                AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
 
                dnl like CF_NCURSES_VERSION
-               cf_cv_ncurses_version=`$NCURSES_CONFIG --version`
+               cf_cv_ncurses_version="`$NCURSES_CONFIG --version`"
 
        else
 
@@ -2479,7 +2604,7 @@ else
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CPPFLAGS version: 21 updated: 2012/10/06 08:57:51
+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.
@@ -2513,7 +2638,7 @@ test "$cf_cv_curses_dir" != "no" && { \
 
 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"
+       { 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,$1)
@@ -2565,7 +2690,7 @@ AC_TRY_LINK([
 test "$cf_cv_ncurses_ext_funcs" = yes && AC_DEFINE(NCURSES_EXT_FUNCS,1,[Define to 1 if we have ncurses extensions])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_HEADER version: 4 updated: 2015/04/15 19:08:48
+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.
@@ -2580,7 +2705,7 @@ 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 $cf_search
+       test -n "$verbose" && echo "search path $cf_search"
        cf_save2_CPPFLAGS="$CPPFLAGS"
        for cf_incdir in $cf_search
        do
@@ -2592,7 +2717,7 @@ AC_CACHE_CHECK(for $cf_ncuhdr_root include-path, cf_cv_ncurses_h2,[
                        CF_NCURSES_CC_CHECK(cf_cv_ncurses_h2,$cf_header,$1)
                        if test "$cf_cv_ncurses_h2" != no ; then
                                cf_cv_ncurses_h2=$cf_incdir/$cf_header
-                               test -n "$verbose" && echo $ac_n "      ... found $ac_c" 1>&AC_FD_MSG
+                               test -n "$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
@@ -2604,9 +2729,9 @@ AC_CACHE_CHECK(for $cf_ncuhdr_root include-path, cf_cv_ncurses_h2,[
        ])
 
        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/$cf_cv_ncurses_header
+       cf_cv_ncurses_header="`basename "$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)
 
@@ -2614,13 +2739,13 @@ fi
 
 # Set definitions to allow ifdef'ing for ncurses.h
 
-case $cf_cv_ncurses_header in
+case "$cf_cv_ncurses_header" in
 (*ncurses.h)
        AC_DEFINE(HAVE_NCURSES_H,1,[Define to 1 if we have ncurses.h])
        ;;
 esac
 
-case $cf_cv_ncurses_header in
+case "$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])
        ;;
@@ -2631,7 +2756,7 @@ esac
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_LIBS version: 17 updated: 2015/04/15 19:08:48
+dnl CF_NCURSES_LIBS version: 20 updated: 2021/01/03 08:05:37
 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.
@@ -2657,7 +2782,7 @@ AC_CHECK_LIB(gpm,Gpm_Open,
                [LIBS="$cf_ncurses_SAVE"],
                [cf_ncurses_LIBS="-lgpm"])])
 
-case $host_os in
+case "$host_os" in
 (freebsd*)
        # This is only necessary if you are linking against an obsolete
        # version of ncurses (but it should do no harm, since it's static).
@@ -2669,7 +2794,7 @@ esac
 
 CF_ADD_LIBS($cf_ncurses_LIBS)
 
-if ( test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no" )
+if test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no"
 then
        CF_ADD_LIBS(-l$cf_nculib_root)
 else
@@ -2683,13 +2808,13 @@ if test -n "$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%$p$%%"`
+               q=`echo "$LIBS" | sed -e "s%$p %%" -e "s%$p$%%"`
                if test "$q" != "$LIBS" ; then
                        LIBS="$q"
                fi
        done
        AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-               [initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
+               [initscr(); mousemask(0,0); tigetstr((char *)0);],
                [AC_MSG_RESULT(yes)],
                [AC_MSG_RESULT(no)
                 LIBS="$cf_ncurses_SAVE"])
@@ -2714,7 +2839,7 @@ then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_VERSION version: 15 updated: 2017/05/09 19:26:10
+dnl CF_NCURSES_VERSION version: 16 updated: 2020/12/31 20:19:42
 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
@@ -2725,7 +2850,7 @@ 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 $cf_tempfile
+       rm -f "$cf_tempfile"
        AC_TRY_RUN([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <stdio.h>
@@ -2734,13 +2859,13 @@ int main(void)
        FILE *fp = fopen("$cf_tempfile", "w");
 #ifdef NCURSES_VERSION
 # ifdef NCURSES_VERSION_PATCH
-       fprintf(fp, "%s.%d\n", NCURSES_VERSION, NCURSES_VERSION_PATCH);
+       fprintf(fp, "%s.%d\\n", NCURSES_VERSION, NCURSES_VERSION_PATCH);
 # else
-       fprintf(fp, "%s\n", NCURSES_VERSION);
+       fprintf(fp, "%s\\n", NCURSES_VERSION);
 # endif
 #else
 # ifdef __NCURSES_H
-       fprintf(fp, "old\n");
+       fprintf(fp, "old\\n");
 # else
        make an error
 # endif
@@ -2751,7 +2876,7 @@ int main(void)
 
        # This will not work if the preprocessor splits the line after the
        # Autoconf token.  The 'unproto' program does that.
-       cat > conftest.$ac_ext <<EOF
+       cat > "conftest.$ac_ext" <<EOF
 #include <${cf_cv_ncurses_header:-curses.h}>
 #undef Autoconf
 #ifdef NCURSES_VERSION
@@ -2766,12 +2891,12 @@ EOF
        cf_try="$ac_cpp conftest.$ac_ext 2>&AC_FD_CC | grep '^Autoconf ' >conftest.out"
        AC_TRY_EVAL(cf_try)
        if test -f conftest.out ; then
-               cf_out=`cat conftest.out | sed -e 's%^Autoconf %%' -e 's%^[[^"]]*"%%' -e 's%".*%%'`
+               cf_out=`sed -e 's%^Autoconf %%' -e 's%^[[^"]]*"%%' -e 's%".*%%' conftest.out`
                test -n "$cf_out" && cf_cv_ncurses_version="$cf_out"
                rm -f conftest.out
        fi
 ])
-       rm -f $cf_tempfile
+       rm -f "$cf_tempfile"
 ])
 test "$cf_cv_ncurses_version" = no || AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
 ])dnl
@@ -2831,23 +2956,33 @@ AC_TRY_COMPILE([
 test "$cf_cv_netbsd_menu_h" = yes && AC_DEFINE(HAVE_NETBSD_MENU_H,1,[Define to 1 if we appear to be using NetBSD menu.h])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NO_LEAKS_OPTION version: 6 updated: 2015/04/12 15:39:00
+dnl CF_NO_LEAKS_OPTION version: 9 updated: 2021/06/13 19:45:41
 dnl ------------------
 dnl see CF_WITH_NO_LEAKS
+dnl
+dnl $1 = option/name
+dnl $2 = help-text
+dnl $3 = symbol to define if the option is set
+dnl $4 = additional actions to take if the option is set
 AC_DEFUN([CF_NO_LEAKS_OPTION],[
 AC_MSG_CHECKING(if you want to use $1 for testing)
 AC_ARG_WITH($1,
        [$2],
-       [AC_DEFINE_UNQUOTED($3,1,"Define to 1 if you want to use $1 for testing.")ifelse([$4],,[
+       [case "x$withval" in
+       (x|xno) ;;
+       (*)
+               : "${with_cflags:=-g}"
+               : "${enable_leaks:=no}"
+               with_$1=yes
+               AC_DEFINE_UNQUOTED($3,1,"Define to 1 if you want to use $1 for testing.")ifelse([$4],,[
         $4
 ])
-       : ${with_cflags:=-g}
-       : ${with_no_leaks:=yes}
-        with_$1=yes],
+               ;;
+       esac],
        [with_$1=])
 AC_MSG_RESULT(${with_$1:-no})
 
-case .$with_cflags in
+case ".$with_cflags" in
 (.*-g*)
        case .$CFLAGS in
        (.*-g*)
@@ -2860,7 +2995,7 @@ case .$with_cflags in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PATH_SYNTAX version: 16 updated: 2015/04/18 08:56:57
+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
@@ -2880,16 +3015,16 @@ case ".[$]$1" in
        ;;
 (.[[a-zA-Z]]:[[\\/]]*) # OS/2 EMX
        ;;
-(.\[$]{*prefix}*|.\[$]{*dir}*)
+(.\[$]\{*prefix\}*|.\[$]\{*dir\}*)
        eval $1="[$]$1"
        case ".[$]$1" in
        (.NONE/*)
-               $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
+               $1=`echo "[$]$1" | sed -e s%NONE%$cf_path_syntax%`
                ;;
        esac
        ;;
 (.no|.NONE/*)
-       $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
+       $1=`echo "[$]$1" | sed -e s%NONE%$cf_path_syntax%`
        ;;
 (*)
        ifelse([$2],,[AC_MSG_ERROR([expected a pathname, not \"[$]$1\"])],$2)
@@ -2897,7 +3032,7 @@ case ".[$]$1" in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PDCURSES_X11 version: 14 updated: 2018/06/20 20:23:13
+dnl CF_PDCURSES_X11 version: 15 updated: 2021/01/02 09:31:20
 dnl ---------------
 dnl Configure for PDCurses' X11 library
 AC_DEFUN([CF_PDCURSES_X11],[
@@ -2933,7 +3068,7 @@ char *XCursesProgramName = "test";
 
 fi
 
-if test $cf_cv_lib_XCurses = yes ; then
+if test "$cf_cv_lib_XCurses" = yes ; then
        AC_DEFINE(UNIX,1,[Define to 1 if using PDCurses on Unix])
        AC_DEFINE(XCURSES,1,[Define to 1 if using PDCurses on Unix])
        AC_CHECK_HEADER(xcurses.h, AC_DEFINE(HAVE_XCURSES,1,[Define to 1 if using PDCurses on Unix]))
@@ -2942,7 +3077,7 @@ else
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PKG_CONFIG version: 10 updated: 2015/04/26 18:06:58
+dnl CF_PKG_CONFIG version: 11 updated: 2021/01/01 13:31:04
 dnl -------------
 dnl Check for the package-config program, unless disabled by command-line.
 AC_DEFUN([CF_PKG_CONFIG],
@@ -2954,7 +3089,7 @@ AC_ARG_WITH(pkg-config,
        [cf_pkg_config=yes])
 AC_MSG_RESULT($cf_pkg_config)
 
-case $cf_pkg_config in
+case "$cf_pkg_config" in
 (no)
        PKG_CONFIG=none
        ;;
@@ -3084,7 +3219,7 @@ AC_TRY_COMPILE([#include <stdio.h>],[
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PRG_RULES version: 1 updated: 2006/06/03 11:45:08
+dnl CF_PRG_RULES version: 2 updated: 2021/01/01 13:31:04
 dnl ------------
 dnl Append definitions and rules for the given programs to the subdirectory
 dnl Makefiles, and the recursion rule for the top-level Makefile.
@@ -3099,10 +3234,10 @@ AC_DEFUN([CF_PRG_RULES],
 [
 for cf_dir in $2
 do
-       if test ! -d $srcdir/$cf_dir; then
+       if test ! -d "$srcdir/$cf_dir" ; then
                continue
-       elif test -f $srcdir/$cf_dir/programs; then
-               $AWK -f $1 $srcdir/$cf_dir/programs >>$cf_dir/Makefile
+       elif test -f "$srcdir/$cf_dir/programs" ; then
+               $AWK -f $1 "$srcdir/$cf_dir/programs" >>$cf_dir/Makefile
        fi
 done
 
@@ -3125,7 +3260,7 @@ CF_ACVERSION_CHECK(2.52,
 CF_CC_ENV_FLAGS
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PROG_INSTALL version: 7 updated: 2015/04/18 08:56:57
+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
@@ -3138,7 +3273,7 @@ case $INSTALL in
 (*)
        CF_DIRNAME(cf_dir,$INSTALL)
        test -z "$cf_dir" && cf_dir=.
-       INSTALL=`cd $cf_dir && pwd`/`echo $INSTALL | sed -e 's%^.*/%%'`
+       INSTALL="`cd \"$cf_dir\" && pwd`"/"`echo "$INSTALL" | sed -e 's%^.*/%%'`"
        ;;
 esac
 ])dnl
@@ -3184,11 +3319,12 @@ CFLAGS="$cf_save_CFLAGS_$1"
 CPPFLAGS="$cf_save_CPPFLAGS_$1"
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_RPATH_HACK version: 11 updated: 2013/09/01 13:02:00
+dnl CF_RPATH_HACK version: 13 updated: 2021/01/03 18:30:50
 dnl -------------
 AC_DEFUN([CF_RPATH_HACK],
-[
-AC_REQUIRE([CF_LD_RPATH_OPT])
+[AC_REQUIRE([AC_PROG_FGREP])dnl
+AC_REQUIRE([CF_LD_RPATH_OPT])dnl
+
 AC_MSG_CHECKING(for updated LDFLAGS)
 if test -n "$LD_RPATH_OPT" ; then
        AC_MSG_RESULT(maybe)
@@ -3201,8 +3337,8 @@ if test -n "$LD_RPATH_OPT" ; then
 
 AC_TRY_LINK([#include <stdio.h>],
                [printf("Hello");],
-               [cf_rpath_oops=`$cf_ldd_prog conftest$ac_exeext | fgrep ' not found' | sed -e 's% =>.*$%%' |sort | uniq`
-                cf_rpath_list=`$cf_ldd_prog conftest$ac_exeext | fgrep / | sed -e 's%^.*[[     ]]/%/%' -e 's%/[[^/]][[^/]]*$%%' |sort | uniq`])
+               [cf_rpath_oops=`"$cf_ldd_prog" "conftest$ac_exeext" | ${FGREP-fgrep} ' not found' | sed -e 's% =>.*$%%' |sort | uniq`
+                cf_rpath_list=`"$cf_ldd_prog" "conftest$ac_exeext" | ${FGREP-fgrep} / | sed -e 's%^.*[[        ]]/%/%' -e 's%/[[^/]][[^/]]*$%%' |sort | uniq`])
 
                # If we passed the link-test, but get a "not found" on a given library,
                # this could be due to inept reconfiguration of gcc to make it only
@@ -3218,7 +3354,7 @@ AC_TRY_LINK([#include <stdio.h>],
                                        /usr/pkg \
                                        /opt/sfw
                                do
-                                       if test -f $cf_rpath_dir/lib/$cf_rpath_src
+                                       if test -f "$cf_rpath_dir/lib/$cf_rpath_src"
                                        then
                                                CF_VERBOSE(...adding -L$cf_rpath_dir/lib to LDFLAGS for $cf_rpath_src)
                                                LDFLAGS="$LDFLAGS -L$cf_rpath_dir/lib"
@@ -3241,7 +3377,7 @@ fi
 AC_SUBST(EXTRA_LDFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_RPATH_HACK_2 version: 7 updated: 2015/04/12 15:39:00
+dnl CF_RPATH_HACK_2 version: 8 updated: 2021/01/01 13:31:04
 dnl ---------------
 dnl Do one set of substitutions for CF_RPATH_HACK, adding an rpath option to
 dnl EXTRA_LDFLAGS for each -L option found.
@@ -3257,7 +3393,7 @@ CF_VERBOSE(...checking $1 [$]$1)
 cf_rpath_dst=
 for cf_rpath_src in [$]$1
 do
-       case $cf_rpath_src in
+       case "$cf_rpath_src" in
        (-L*)
 
                # check if this refers to a directory which we will ignore
@@ -3326,7 +3462,7 @@ do
 done
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SIGWINCH version: 2 updated: 2019/03/23 19:54:44
+dnl CF_SIGWINCH version: 6 updated: 2021/01/01 13:31:04
 dnl -----------
 dnl Use this macro after CF_XOPEN_SOURCE, but do not require it (not all
 dnl programs need this test).
@@ -3341,7 +3477,7 @@ AC_CACHE_CHECK(if SIGWINCH is defined,cf_cv_define_sigwinch,[
        AC_TRY_COMPILE([
 #include <sys/types.h>
 #include <sys/signal.h>
-],[int x = SIGWINCH],
+],[int x = SIGWINCH; (void)x],
        [cf_cv_define_sigwinch=yes],
        [AC_TRY_COMPILE([
 #undef _XOPEN_SOURCE
@@ -3349,7 +3485,7 @@ AC_CACHE_CHECK(if SIGWINCH is defined,cf_cv_define_sigwinch,[
 #undef _POSIX_C_SOURCE
 #include <sys/types.h>
 #include <sys/signal.h>
-],[int x = SIGWINCH],
+],[int x = SIGWINCH; (void)x],
        [cf_cv_define_sigwinch=maybe],
        [cf_cv_define_sigwinch=no])
 ])
@@ -3359,7 +3495,7 @@ if test "$cf_cv_define_sigwinch" = maybe ; then
 AC_CACHE_CHECK(for actual SIGWINCH definition,cf_cv_fixup_sigwinch,[
 cf_cv_fixup_sigwinch=unknown
 cf_sigwinch=32
-while test $cf_sigwinch != 1
+while test "$cf_sigwinch" != 1
 do
        AC_TRY_COMPILE([
 #undef _XOPEN_SOURCE
@@ -3371,11 +3507,11 @@ do
 #if SIGWINCH != $cf_sigwinch
 make an error
 #endif
-int x = SIGWINCH],
+int x = SIGWINCH; (void)x],
        [cf_cv_fixup_sigwinch=$cf_sigwinch
         break])
 
-cf_sigwinch=`expr $cf_sigwinch - 1`
+cf_sigwinch="`expr "$cf_sigwinch" - 1`"
 done
 ])
 
@@ -3385,7 +3521,7 @@ done
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SIG_ATOMIC_T version: 4 updated: 2020/01/18 12:30:44
+dnl CF_SIG_ATOMIC_T version: 5 updated: 2020/03/10 18:53:47
 dnl ---------------
 dnl signal handler, but there are some gcc dependencies in that recommendation.
 dnl Try anyway.
@@ -3407,6 +3543,7 @@ extern $cf_type x;
 $cf_type x;
 static void handler(int sig)
 {
+       (void)sig;
        x = 5;
 }],
                [signal(SIGINT, handler);
@@ -3467,14 +3604,14 @@ AC_MSG_RESULT($cf_cv_sys_time_select)
 test "$cf_cv_sys_time_select" = yes && AC_DEFINE(HAVE_SYS_TIME_SELECT,1,[Define to 1 if we can include <sys/time.h> with <sys/select.h>])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_TERM_HEADER version: 4 updated: 2015/04/15 19:08:48
+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 ${cf_cv_ncurses_header} in
+case "${cf_cv_ncurses_header}" in
 (*/ncurses.h|*/ncursesw.h)
        cf_term_header=`echo "$cf_cv_ncurses_header" | sed -e 's%ncurses[[^.]]*\.h$%term.h%'`
        ;;
@@ -3488,7 +3625,7 @@ do
 AC_TRY_COMPILE([#include <stdio.h>
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <$cf_test>
-],[int x = auto_left_margin],[
+],[int x = auto_left_margin; (void)x],[
        cf_cv_term_header="$cf_test"],[
        cf_cv_term_header=unknown
        ])
@@ -3498,13 +3635,13 @@ done
 
 # Set definitions to allow ifdef'ing to accommodate subdirectories
 
-case $cf_cv_term_header in
+case "$cf_cv_term_header" in
 (*term.h)
        AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
        ;;
 esac
 
-case $cf_cv_term_header in
+case "$cf_cv_term_header" in
 (ncurses/term.h)
        AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
        ;;
@@ -3523,21 +3660,21 @@ top_builddir=ifelse($1,,`pwd`,$1)
 AC_SUBST(top_builddir)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_TPUTS_PROTO version: 3 updated: 2015/04/17 21:26:14
+dnl CF_TPUTS_PROTO version: 4 updated: 2021/01/04 19:45:09
 dnl --------------
 dnl Check for type of function-pointer passed to tputs.  Some old
 dnl implementations used functions that had different prototypes, making it
 dnl hard to compile portable programs using tputs.
 AC_DEFUN([CF_TPUTS_PROTO],[
 CF_CURSES_FUNCS(tputs)
-if test x$cf_cv_func_tputs = xyes
+if test "x$cf_cv_func_tputs" = xyes
 then
        cf_done=no
        for cf_arg in int char
        do
                for cf_ret in int void
                do
-                       if test $cf_ret = void
+                       if test "$cf_ret" = void
                        then
                                cf_return="/* nothing */"
                        else
@@ -3562,7 +3699,7 @@ EOF
                break
 ])
                done
-               test $cf_done = yes && break
+               test "$cf_done" = yes && break
        done
 fi
 ])dnl
@@ -3583,21 +3720,21 @@ AC_DEFUN([CF_TRIM_X_LIBS],[
        done
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_TRY_PKG_CONFIG version: 5 updated: 2013/07/06 21:27:06
+dnl CF_TRY_PKG_CONFIG version: 6 updated: 2020/12/31 10:54:15
 dnl -----------------
 dnl This is a simple wrapper to use for pkg-config, for libraries which may be
 dnl available in that form.
 dnl
-dnl $1 = package name
+dnl $1 = package name, which may be a shell variable
 dnl $2 = extra logic to use, if any, after updating CFLAGS and LIBS
 dnl $3 = logic to use if pkg-config does not have the package
 AC_DEFUN([CF_TRY_PKG_CONFIG],[
 AC_REQUIRE([CF_PKG_CONFIG])
 
-if test "$PKG_CONFIG" != none && "$PKG_CONFIG" --exists $1; then
+if test "$PKG_CONFIG" != none && "$PKG_CONFIG" --exists "$1"; then
        CF_VERBOSE(found package $1)
-       cf_pkgconfig_incs="`$PKG_CONFIG --cflags $1 2>/dev/null`"
-       cf_pkgconfig_libs="`$PKG_CONFIG --libs   $1 2>/dev/null`"
+       cf_pkgconfig_incs="`$PKG_CONFIG --cflags "$1" 2>/dev/null`"
+       cf_pkgconfig_libs="`$PKG_CONFIG --libs   "$1" 2>/dev/null`"
        CF_VERBOSE(package $1 CFLAGS: $cf_pkgconfig_incs)
        CF_VERBOSE(package $1 LIBS: $cf_pkgconfig_libs)
        CF_ADD_CFLAGS($cf_pkgconfig_incs)
@@ -3658,15 +3795,21 @@ AC_DEFUN([CF_UPPER],
 $1=`echo "$2" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_UTF8_LIB version: 8 updated: 2012/10/06 08:57:51
+dnl CF_UTF8_LIB version: 9 updated: 2021/05/19 19:35:25
 dnl -----------
 dnl Check for multibyte support, and if not found, utf8 compatibility library
 AC_DEFUN([CF_UTF8_LIB],
 [
+AC_HAVE_HEADERS(wchar.h)
 AC_CACHE_CHECK(for multibyte character support,cf_cv_utf8_lib,[
        cf_save_LIBS="$LIBS"
        AC_TRY_LINK([
-#include <stdlib.h>],[putwc(0,0);],
+#include <stdlib.h>
+#include <stdio.h>
+#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,
@@ -3742,7 +3885,7 @@ fi
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_CURSES_DIR version: 3 updated: 2010/11/20 17:02:38
+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.
@@ -3755,7 +3898,7 @@ AC_ARG_WITH(curses-dir,
        [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" )
+if test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no"
 then
        CF_PATH_SYNTAX(withval)
        if test -d "$cf_cv_curses_dir"
@@ -3796,6 +3939,35 @@ if test "$with_dmalloc" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_WITH_LIB_BASENAME version: 1 updated: 2020/03/07 20:05:14
+dnl --------------------
+dnl Allow for overriding the basename of a library, i.e., the part to which
+dnl prefixes/suffixes are attached.
+dnl
+dnl $1 = variable to set
+dnl $2 = option name
+dnl $3 = default basename for library, if omitted use $2
+AC_DEFUN([CF_WITH_LIB_BASENAME],
+[
+AC_MSG_CHECKING(for desired basename for $2 library)
+AC_ARG_WITH($2-libname,
+       [  --with-$2-libname=XXX override ifelse($3,,$2,$3) basename of library],
+       [with_lib_basename=$withval],
+       [with_lib_basename=ifelse($3,,$2,$3)])
+$1="$with_lib_basename"
+
+case "x[$]$1" in
+(x|xno|xnone|xyes)
+       $1=ifelse($3,,$2,$3)
+       ;;
+(*)
+       ;;
+esac
+
+AC_MSG_RESULT([$]$1)
+AC_SUBST($1)
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_WITH_NCURSES_ETC version: 5 updated: 2016/02/20 19:23:20
 dnl -------------------
 dnl Use this macro for programs which use any variant of "curses", e.g.,
@@ -3857,6 +4029,23 @@ esac
 
 CF_NCURSES_PTHREADS($cf_cv_screen)
 
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_SCREEN_PDCURSES version: 1 updated: 2020/08/28 16:56:27
+dnl -----------------------
+dnl Call this macro before CF_ENABLE_WARNINGS for configure scripts which use
+dnl the "--with-screen=pdcurses" selection.  Doing that allows the configure
+dnl script to search for the X11/Xt header files to declare (or not) the
+dnl symbol needed to enable "const" in those header files.  If that configure
+dnl option is not used, then those checks are unnecessary.
+AC_DEFUN([CF_WITH_SCREEN_PDCURSES],[
+AC_PROVIDE([AC_PATH_XTRA])
+AC_PROVIDE([AC_PATH_X])
+if test -n "$with_screen" && test "x$with_screen" = "xpdcurses"
+then
+       AC_PATH_X
+       AC_PATH_XTRA
+fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_WITH_VALGRIND version: 1 updated: 2006/12/14 18:00:21
@@ -3953,7 +4142,7 @@ fi
 AC_SUBST(no_x11_rgb)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_CURSES version: 14 updated: 2018/06/20 20:23:13
+dnl CF_XOPEN_CURSES version: 16 updated: 2021/01/02 09:31:20
 dnl ---------------
 dnl Test if we should define X/Open source for curses, needed on Digital Unix
 dnl 4.x, to see the extended functions, but breaks on IRIX 6.x.
@@ -3979,7 +4168,14 @@ AC_TRY_LINK([
 #endif
        long x = winnstr(stdscr, "", 0);
        int x1, y1;
-       getbegyx(stdscr, y1, x1)],
+#ifdef NCURSES_VERSION
+       (void)check2;
+#endif
+       getbegyx(stdscr, y1, x1);
+       (void)x;
+       (void)y1;
+       (void)x1;
+       ],
        [cf_cv_need_xopen_extension=none],
        [
        for cf_try_xopen_extension in _XOPEN_SOURCE_EXTENDED NCURSES_WIDECHAR
@@ -3994,13 +4190,20 @@ AC_TRY_LINK([
 #endif
                long x = winnstr(stdscr, "", 0);
                int x1, y1;
-               getbegyx(stdscr, y1, x1)],
+               getbegyx(stdscr, y1, x1);
+#ifdef NCURSES_VERSION
+               (void)check2;
+#endif
+               (void)x;
+               (void)y1;
+               (void)x1;
+               ],
                [cf_cv_need_xopen_extension=$cf_try_xopen_extension; break])
        done
        ])
 ])
 
-case $cf_cv_need_xopen_extension in
+case "$cf_cv_need_xopen_extension" in
 (*_*)
        CF_APPEND_TEXT(CPPFLAGS,-D$cf_cv_need_xopen_extension)
        ;;
@@ -4008,7 +4211,7 @@ esac
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_SOURCE version: 55 updated: 2018/12/31 20:46:17
+dnl CF_XOPEN_SOURCE version: 58 updated: 2021/05/01 17:49:36
 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,
@@ -4027,7 +4230,7 @@ cf_XOPEN_SOURCE=ifelse([$1],,500,[$1])
 cf_POSIX_C_SOURCE=ifelse([$2],,199506L,[$2])
 cf_xopen_source=
 
-case $host_os in
+case "$host_os" in
 (aix[[4-7]]*)
        cf_xopen_source="-D_ALL_SOURCE"
        ;;
@@ -4073,7 +4276,15 @@ case $host_os in
 (netbsd*)
        cf_xopen_source="-D_NETBSD_SOURCE" # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
        ;;
-(openbsd[[4-9]]*)
+(openbsd[[6-9]]*)
+       # OpenBSD 6.x has broken locale support, both compile-time and runtime.
+       # see https://www.mail-archive.com/bugs@openbsd.org/msg13200.html
+       # Abusing the conformance level is a workaround.
+       AC_MSG_WARN(this system does not provide usable locale support)
+       cf_xopen_source="-D_BSD_SOURCE"
+       cf_XOPEN_SOURCE=700
+       ;;
+(openbsd[[4-5]]*)
        # setting _XOPEN_SOURCE lower than 500 breaks g++ compile with wchar.h, needed for ncursesw
        cf_xopen_source="-D_BSD_SOURCE"
        cf_XOPEN_SOURCE=600
@@ -4120,7 +4331,7 @@ make an error
        [cf_XOPEN_SOURCE_set=yes],
        [cf_XOPEN_SOURCE_set=no])
        AC_MSG_RESULT($cf_XOPEN_SOURCE_set)
-       if test $cf_XOPEN_SOURCE_set = yes
+       if test "$cf_XOPEN_SOURCE_set" = yes
        then
                AC_TRY_COMPILE([#include <stdlib.h>],[
 #if (_XOPEN_SOURCE - 0) < $cf_XOPEN_SOURCE
@@ -4128,7 +4339,7 @@ make an error
 #endif],
                [cf_XOPEN_SOURCE_set_ok=yes],
                [cf_XOPEN_SOURCE_set_ok=no])
-               if test $cf_XOPEN_SOURCE_set_ok = no
+               if test "$cf_XOPEN_SOURCE_set_ok" = no
                then
                        AC_MSG_WARN(_XOPEN_SOURCE is lower than requested)
                fi
@@ -4139,7 +4350,7 @@ fi
 fi # cf_cv_posix_visible
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_X_ATHENA version: 23 updated: 2015/04/12 15:39:00
+dnl CF_X_ATHENA version: 24 updated: 2020/03/10 18:53:47
 dnl -----------
 dnl Check for Xaw (Athena) libraries
 dnl
@@ -4215,7 +4426,8 @@ AC_CACHE_CHECK(for usable $cf_x_athena/Xmu package,cf_cv_xaw_compat,[
 AC_TRY_LINK([
 #include <X11/Xmu/CharSet.h>
 ],[
-int check = XmuCompareISOLatin1("big", "small")
+int check = XmuCompareISOLatin1("big", "small");
+(void)check;
 ],[cf_cv_xaw_compat=yes],[cf_cv_xaw_compat=no])])
 
                        if test "$cf_cv_xaw_compat" = no
@@ -4251,7 +4463,7 @@ if test -z "$cf_x_athena_lib" ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_X_ATHENA_CPPFLAGS version: 8 updated: 2020/01/16 05:21:56
+dnl CF_X_ATHENA_CPPFLAGS version: 9 updated: 2020/12/31 10:54:15
 dnl --------------------
 dnl Normally invoked by CF_X_ATHENA, with $1 set to the appropriate flavor of
 dnl the Athena widgets, e.g., Xaw, Xaw3d, neXtaw.
@@ -4270,7 +4482,7 @@ do
        if test -z "$cf_x_athena_inc" ; then
                CF_SAVE_XTRA_FLAGS([CF_X_ATHENA_CPPFLAGS])
                cf_test=X11/$cf_x_athena_root/SimpleMenu.h
-               if test $cf_path != default ; then
+               if test "$cf_path" != default ; then
                        CF_APPEND_TEXT(CPPFLAGS,-I$cf_path/include)
                        AC_MSG_CHECKING(for $cf_test in $cf_path)
                else
@@ -4285,7 +4497,7 @@ do
                CF_RESTORE_XTRA_FLAGS([CF_X_ATHENA_CPPFLAGS])
                if test "$cf_result" = yes ; then
                        test "$cf_path"  = default && cf_x_athena_inc=default
-                       test "$cf_path" != default && cf_x_athena_inc=$cf_path/include
+                       test "$cf_path" != default && cf_x_athena_inc="$cf_path/include"
                        break
                fi
        fi
@@ -4367,7 +4579,7 @@ CF_TRY_PKG_CONFIG(Xext,,[
                [CF_ADD_LIB(Xext)])])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_X_TOOLKIT version: 24 updated: 2019/03/23 19:54:44
+dnl CF_X_TOOLKIT version: 26 updated: 2021/01/02 09:31:20
 dnl ------------
 dnl Check for X Toolkit libraries
 AC_DEFUN([CF_X_TOOLKIT],
@@ -4387,6 +4599,8 @@ then
        CF_TRY_PKG_CONFIG(ice,,[AC_MSG_WARN(unable to find ICE library)])
        CF_TRY_PKG_CONFIG(sm,,[AC_MSG_WARN(unable to find SM library)])
        CF_TRY_PKG_CONFIG(xt,,[AC_MSG_WARN(unable to find Xt library)])
+else
+       LIBS="$X_PRE_LIBS $LIBS $X_EXTRA_LIBS"
 fi
 
 cf_have_X_LIBS=no
@@ -4419,7 +4633,7 @@ AC_TRY_LINK([
 AC_CACHE_CHECK(for usable X Toolkit package,cf_cv_xt_ice_compat,[
 AC_TRY_LINK([
 #include <X11/Shell.h>
-],[int num = IceConnectionNumber(0)
+],[int num = IceConnectionNumber(0); (void) num
 ],[cf_cv_xt_ice_compat=yes],[cf_cv_xt_ice_compat=no])])
 
        if test "$cf_cv_xt_ice_compat" = no
@@ -4449,18 +4663,16 @@ AC_TRY_LINK([
 
        AC_CHECK_FUNC(XOpenDisplay,,[
        AC_CHECK_LIB(X11,XOpenDisplay,
-               [CF_ADD_LIB(X11)],,
-               [$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+               [CF_ADD_LIB(X11)])])
 
        AC_CHECK_FUNC(XtAppInitialize,,[
        AC_CHECK_LIB(Xt, XtAppInitialize,
                [AC_DEFINE(HAVE_LIBXT,1,[Define to 1 if we can compile with the Xt library])
                 cf_have_X_LIBS=Xt
-                LIBS="-lXt $X_PRE_LIBS $LIBS $X_EXTRA_LIBS"],,
-               [$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+                LIBS="-lXt $LIBS"])])
 ])
 
-if test $cf_have_X_LIBS = no ; then
+if test "$cf_have_X_LIBS" = no ; then
        AC_MSG_WARN(
 [Unable to successfully link X Toolkit library (-lXt) with
 test program.  You will have to check and add the proper libraries by hand
@@ -4468,7 +4680,7 @@ to makefile.])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF__CURSES_DATA version: 2 updated: 2020/02/08 21:00:26
+dnl CF__CURSES_DATA version: 3 updated: 2021/01/04 19:45:09
 dnl ---------------
 dnl Attempt to make a copy of a curses data item.  This is needed in the
 dnl check-data configure tests when using ncurses, because the symbol may be
@@ -4483,7 +4695,7 @@ define([CF__CURSES_DATA],[
 #else
        const void *$1 = &($2);
 #endif
-       fprintf(stderr, "testing linkage of $2:%p\n", (const void *)$1);
+       fprintf(stderr, "testing linkage of $2:%p\\n", (const void *)$1);
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF__CURSES_HEAD version: 2 updated: 2010/10/23 15:54:49