1 files changed, 2221 insertions, 786 deletions

diff --git a/contrib/dialog/aclocal.m4 b/contrib/dialog/aclocal.m4
index 35f94c5f4da3..c33827fce67b 100644
--- a/contrib/dialog/aclocal.m4
+++ b/contrib/dialog/aclocal.m4
@@ -1,7 +1,7 @@
 dnl macros used for DIALOG configure script
-dnl $Id: aclocal.m4,v 1.94 2013/09/22 14:26:24 tom Exp $
+dnl $Id: aclocal.m4,v 1.120 2018/06/21 00:30:26 tom Exp $
 dnl ---------------------------------------------------------------------------
-dnl Copyright 1999-2012,2013 -- Thomas E. Dickey
+dnl Copyright 1999-2017,2018 -- Thomas E. Dickey
 dnl
 dnl Permission is hereby granted, free of charge, to any person obtaining a
 dnl copy of this software and associated documentation files (the
@@ -31,7 +31,7 @@ dnl see
 dnl http://invisible-island.net/autoconf/ 
 dnl ---------------------------------------------------------------------------
 dnl ---------------------------------------------------------------------------
-dnl AM_GNU_GETTEXT version: 13 updated: 2012/11/09 05:47:26
+dnl AM_GNU_GETTEXT version: 14 updated: 2015/04/15 19:08:48
 dnl --------------
 dnl Usage: Just like AM_WITH_NLS, which see.
 AC_DEFUN([AM_GNU_GETTEXT],
@@ -73,7 +73,7 @@ strdup strtoul tsearch __argz_count __argz_stringify __argz_next])
            #      presentlang can be used as a fallback for messages
            #      which are not translated in the desiredlang catalog).
            case "$desiredlang" in
-             "$presentlang"*) useit=yes;;
+             ("$presentlang"*) useit=yes;;
            esac
          done
          if test $useit = yes; then
@@ -167,7 +167,7 @@ size_t iconv();
   AC_SUBST(LIBICONV)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl AM_LANGINFO_CODESET version: 3 updated: 2002/10/27 23:21:42
+dnl AM_LANGINFO_CODESET version: 4 updated: 2015/04/18 08:56:57
 dnl -------------------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -178,19 +178,19 @@ dnl
 dnl From Bruno Haible.
 AC_DEFUN([AM_LANGINFO_CODESET],
 [
-  AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
-    [AC_TRY_LINK([#include <langinfo.h>],
-      [char* cs = nl_langinfo(CODESET);],
-      am_cv_langinfo_codeset=yes,
-      am_cv_langinfo_codeset=no)
-    ])
-  if test $am_cv_langinfo_codeset = yes; then
-    AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
-      [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
-  fi
+AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
+	[AC_TRY_LINK([#include <langinfo.h>],
+	[char* cs = nl_langinfo(CODESET);],
+	am_cv_langinfo_codeset=yes,
+	am_cv_langinfo_codeset=no)
+	])
+	if test $am_cv_langinfo_codeset = yes; then
+		AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
+		[Define if you have <langinfo.h> and nl_langinfo(CODESET).])
+	fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl AM_LC_MESSAGES version: 4 updated: 2002/10/27 23:21:42
+dnl AM_LC_MESSAGES version: 5 updated: 2015/05/10 19:52:14
 dnl --------------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -211,17 +211,17 @@ dnl
 dnl serial 2
 dnl
 AC_DEFUN([AM_LC_MESSAGES],
-  [if test $ac_cv_header_locale_h = yes; then
-    AC_CACHE_CHECK([for LC_MESSAGES], am_cv_val_LC_MESSAGES,
-      [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
-       am_cv_val_LC_MESSAGES=yes, am_cv_val_LC_MESSAGES=no)])
-    if test $am_cv_val_LC_MESSAGES = yes; then
-      AC_DEFINE(HAVE_LC_MESSAGES, 1,
-        [Define if your <locale.h> file defines LC_MESSAGES.])
-    fi
-  fi])dnl
+[if test $ac_cv_header_locale_h = yes; then
+	AC_CACHE_CHECK([for LC_MESSAGES], am_cv_val_LC_MESSAGES,
+		[AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
+		am_cv_val_LC_MESSAGES=yes, am_cv_val_LC_MESSAGES=no)])
+	if test $am_cv_val_LC_MESSAGES = yes; then
+		AC_DEFINE(HAVE_LC_MESSAGES, 1,
+		[Define if your <locale.h> file defines LC_MESSAGES.])
+	fi
+fi])dnl
 dnl ---------------------------------------------------------------------------
-dnl AM_PATH_PROG_WITH_TEST version: 8 updated: 2009/01/11 20:31:12
+dnl AM_PATH_PROG_WITH_TEST version: 9 updated: 2015/04/15 19:08:48
 dnl ----------------------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -250,10 +250,10 @@ set dummy $2; ac_word=[$]2
 AC_MSG_CHECKING([for $ac_word])
 AC_CACHE_VAL(ac_cv_path_$1,
 [case "[$]$1" in
-  [[\\/]*|?:[\\/]]*)
+  ([[\\/]*|?:[\\/]]*)
   ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
   ;;
-  *)
+  (*)
   IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR}"
   for ac_dir in ifelse([$5], , $PATH, [$5]); do
     test -z "$ac_dir" && ac_dir=.
@@ -280,7 +280,7 @@ fi
 AC_SUBST($1)dnl
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl AM_WITH_NLS version: 25 updated: 2012/10/06 08:57:51
+dnl AM_WITH_NLS version: 29 updated: 2018/02/21 21:26:03
 dnl -----------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -354,6 +354,8 @@ AC_DEFUN([AM_WITH_NLS],
 
   dnl If we use NLS figure out what method
   if test "$USE_NLS" = "yes"; then
+    dnl We need to process the po/ directory.
+    POSUB=po
     AC_DEFINE(ENABLE_NLS, 1,
       [Define to 1 if translation of program messages to the user's native language
  is requested.])
@@ -367,20 +369,49 @@ AC_DEFUN([AM_WITH_NLS],
     nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
     if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
       dnl User does not insist on using GNU NLS library.  Figure out what
-      dnl to use.  If GNU gettext is available we use this.  Else we have
+      dnl to use.  If GNU gettext is available we use this.  Else we may have
       dnl to fall back to GNU NLS library.
       CATOBJEXT=NONE
 
+      dnl Save these (possibly-set) variables for reference.  If the user
+      dnl overrode these to provide full pathnames, then warn if not actually
+      dnl GNU gettext, but do not override their values.  Also, if they were
+      dnl overridden, suppress the part of the library test which prevents it
+      dnl from finding anything other than GNU gettext.  Doing this also
+      dnl suppresses a bogus search for the intl library.
+      cf_save_msgfmt_path="$MSGFMT"
+      cf_save_xgettext_path="$XGETTEXT"
+
+      dnl Search for GNU msgfmt in the PATH.
+      AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
+          [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
+      AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
+      AC_SUBST(MSGFMT)
+
+      dnl Search for GNU xgettext in the PATH.
+      AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
+          [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
+
+      cf_save_OPTS_1="$CPPFLAGS"
+      if test "x$cf_save_msgfmt_path" = "x$MSGFMT" && \
+         test "x$cf_save_xgettext_path" = "x$XGETTEXT" ; then
+          CF_ADD_CFLAGS(-DIGNORE_MSGFMT_HACK)
+      fi
+
       cf_save_LIBS_1="$LIBS"
       CF_ADD_LIBS($LIBICONV)
-      AC_CACHE_CHECK([for libintl.h and gettext()], cf_cv_func_gettext,[
-        CF_FIND_LINKAGE(CF__INTL_HEAD,
-        CF__INTL_BODY,
+
+      CF_FIND_LINKAGE(CF__INTL_HEAD,
+        CF__INTL_BODY($2),
         intl,
         cf_cv_func_gettext=yes,
         cf_cv_func_gettext=no)
-      ])
+
+      AC_MSG_CHECKING([for libintl.h and gettext()])
+      AC_MSG_RESULT($cf_cv_func_gettext)
+
       LIBS="$cf_save_LIBS_1"
+      CPPFLAGS="$cf_save_OPTS_1"
 
       if test "$cf_cv_func_gettext" = yes ; then
         AC_DEFINE(HAVE_LIBINTL_H,1,[Define to 1 if we have libintl.h])
@@ -408,159 +439,150 @@ AC_DEFUN([AM_WITH_NLS],
           AC_CHECK_FUNCS(dcgettext)
           LIBS="$gt_save_LIBS"
 
-          dnl Search for GNU msgfmt in the PATH.
-          AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
-              [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
-          AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
-
-          dnl Search for GNU xgettext in the PATH.
-          AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
-              [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
-
           CATOBJEXT=.gmo
         fi
+      elif test -z "$MSGFMT" || test -z "$XGETTEXT" ; then
+        AC_MSG_WARN(disabling NLS feature)
+        sed -e /ENABLE_NLS/d confdefs.h >confdefs.tmp
+        mv confdefs.tmp confdefs.h
+        ALL_LINGUAS=
+        CATOBJEXT=.ignored
+        MSGFMT=":"
+        GMSGFMT=":"
+        XGETTEXT=":"
+        POSUB=
+        BUILD_INCLUDED_LIBINTL=no
+        USE_INCLUDED_LIBINTL=no
+        USE_NLS=no
+        nls_cv_use_gnu_gettext=no
       fi
 
       if test "$CATOBJEXT" = "NONE"; then
         dnl GNU gettext is not found in the C library.
         dnl Fall back on GNU gettext library.
-        nls_cv_use_gnu_gettext=yes
+        nls_cv_use_gnu_gettext=maybe
       fi
     fi
 
-    if test "$nls_cv_use_gnu_gettext" = "yes"; then
-      if test ! -d $srcdir/intl ; then
-        AC_MSG_ERROR(no NLS library is packaged with this application)
-      fi
-      dnl Mark actions used to generate GNU NLS library.
-      INTLOBJS="\$(GETTOBJS)"
-      AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
-          [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
-      AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
-      AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
-          [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
-      AC_SUBST(MSGFMT)
-      BUILD_INCLUDED_LIBINTL=yes
-      USE_INCLUDED_LIBINTL=yes
+    if test "$nls_cv_use_gnu_gettext" != "no"; then
       CATOBJEXT=.gmo
-      INTLLIBS="ifelse([$3],[],\$(top_builddir)/intl,[$3])/libintl.ifelse([$1], use-libtool, [l], [])a $LIBICONV"
-      LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
+      if test -f $srcdir/intl/libintl.h ; then
+        dnl Mark actions used to generate GNU NLS library.
+        INTLOBJS="\$(GETTOBJS)"
+        BUILD_INCLUDED_LIBINTL=yes
+        USE_INCLUDED_LIBINTL=yes
+        INTLLIBS="ifelse([$3],[],\$(top_builddir)/intl,[$3])/libintl.ifelse([$1], use-libtool, [l], [])a $LIBICONV"
+        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
+      elif test "$nls_cv_use_gnu_gettext" = "yes"; then
+        nls_cv_use_gnu_gettext=no
+        AC_MSG_WARN(no NLS library is packaged with this application)
+      fi
     fi
 
-    dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
     dnl Test whether we really found GNU msgfmt.
     if test "$GMSGFMT" != ":"; then
-      dnl If it is no GNU msgfmt we define it as : so that the
-      dnl Makefiles still can work.
       if $GMSGFMT --statistics /dev/null >/dev/null 2>&1; then
         : ;
       else
-        AC_MSG_RESULT(
-          [found msgfmt program is not GNU msgfmt; ignore it])
-        GMSGFMT=":"
+        AC_MSG_WARN([found msgfmt program is not GNU msgfmt])
       fi
     fi
 
-    dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
     dnl Test whether we really found GNU xgettext.
     if test "$XGETTEXT" != ":"; then
-        dnl If it is no GNU xgettext we define it as : so that the
-        dnl Makefiles still can work.
       if $XGETTEXT --omit-header /dev/null >/dev/null 2>&1; then
         : ;
       else
-        AC_MSG_RESULT(
-          [found xgettext program is not GNU xgettext; ignore it])
-        XGETTEXT=":"
+        AC_MSG_WARN([found xgettext program is not GNU xgettext])
       fi
     fi
-
-    dnl We need to process the po/ directory.
-    POSUB=po
   fi
 
-  AC_OUTPUT_COMMANDS(
-   [for ac_file in $CONFIG_FILES; do
-
-      # Support "outfile[:infile[:infile...]]"
-      case "$ac_file" in
-        *:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
-      esac
-
-      # PO directories have a Makefile.in generated from Makefile.inn.
-      case "$ac_file" in */[Mm]akefile.in)
-        # Adjust a relative srcdir.
-        ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
-        ac_dir_suffix="/`echo "$ac_dir"|sed 's%^\./%%'`"
-        ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
-        ac_base=`basename $ac_file .in`
-        # In autoconf-2.13 it is called $ac_given_srcdir.
-        # In autoconf-2.50 it is called $srcdir.
-        test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
-
-        case "$ac_given_srcdir" in
-          .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
-          /*) top_srcdir="$ac_given_srcdir" ;;
-          *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  if test "$XGETTEXT" != ":"; then
+    AC_OUTPUT_COMMANDS(
+     [for ac_file in $CONFIG_FILES; do
+
+        # Support "outfile[:infile[:infile...]]"
+        case "$ac_file" in
+          (*:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
         esac
 
-        if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
-          rm -f "$ac_dir/POTFILES"
-          test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
-          sed -e "/^#/d" -e "/^[ 	]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," -e "\$s/\(.*\) \\\\/\1/" < "$ac_given_srcdir/$ac_dir/POTFILES.in" > "$ac_dir/POTFILES"
-          test -n "$as_me" && echo "$as_me: creating $ac_dir/$ac_base" || echo "creating $ac_dir/$ac_base"
-          sed -e "/POTFILES =/r $ac_dir/POTFILES" "$ac_dir/$ac_base.in" > "$ac_dir/$ac_base"
-        fi
-        ;;
-      esac
-    done])
-
-  dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
-  dnl to 'yes' because some of the testsuite requires it.
-  if test "$PACKAGE" = gettext; then
-    BUILD_INCLUDED_LIBINTL=yes
-  fi
+        # PO directories have a Makefile.in generated from Makefile.inn.
+        case "$ac_file" in
+        (*/[Mm]akefile.in)
+          # Adjust a relative srcdir.
+          ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
+          ac_dir_suffix="/`echo "$ac_dir"|sed 's%^\./%%'`"
+          ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
+          ac_base=`basename $ac_file .in`
+          # In autoconf-2.13 it is called $ac_given_srcdir.
+          # In autoconf-2.50 it is called $srcdir.
+          test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
+
+          case "$ac_given_srcdir" in
+            (.)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
+            (/*) top_srcdir="$ac_given_srcdir" ;;
+            (*)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
+          esac
+
+          if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
+            rm -f "$ac_dir/POTFILES"
+            test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
+            sed -e "/^#/d" -e "/^[ 	]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," -e "\$s/\(.*\) \\\\/\1/" < "$ac_given_srcdir/$ac_dir/POTFILES.in" > "$ac_dir/POTFILES"
+            test -n "$as_me" && echo "$as_me: creating $ac_dir/$ac_base" || echo "creating $ac_dir/$ac_base"
+            sed -e "/POTFILES =/r $ac_dir/POTFILES" "$ac_dir/$ac_base.in" > "$ac_dir/$ac_base"
+          fi
+          ;;
+        esac
+      done])
 
-  dnl intl/plural.c is generated from intl/plural.y. It requires bison,
-  dnl because plural.y uses bison specific features. It requires at least
-  dnl bison-1.26 because earlier versions generate a plural.c that doesn't
-  dnl compile.
-  dnl bison is only needed for the maintainer (who touches plural.y). But in
-  dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
-  dnl the rule in general Makefile. Now, some people carelessly touch the
-  dnl files or have a broken "make" program, hence the plural.c rule will
-  dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
-  dnl present or too old.
-  if test "$nls_cv_use_gnu_gettext" = "yes"; then
-    AC_CHECK_PROGS([INTLBISON], [bison])
-    if test -z "$INTLBISON"; then
-      ac_verc_fail=yes
-    else
-      dnl Found it, now check the version.
-      AC_MSG_CHECKING([version of bison])
+    dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
+    dnl to 'yes' because some of the testsuite requires it.
+    if test "$PACKAGE" = gettext; then
+      BUILD_INCLUDED_LIBINTL=yes
+    fi
+
+    dnl intl/plural.c is generated from intl/plural.y. It requires bison,
+    dnl because plural.y uses bison specific features. It requires at least
+    dnl bison-1.26 because earlier versions generate a plural.c that doesn't
+    dnl compile.
+    dnl bison is only needed for the maintainer (who touches plural.y). But in
+    dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
+    dnl the rule in general Makefile. Now, some people carelessly touch the
+    dnl files or have a broken "make" program, hence the plural.c rule will
+    dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
+    dnl present or too old.
+    if test "$nls_cv_use_gnu_gettext" = "yes"; then
+      AC_CHECK_PROGS([INTLBISON], [bison])
+      if test -z "$INTLBISON"; then
+        ac_verc_fail=yes
+      else
+        dnl Found it, now check the version.
+        AC_MSG_CHECKING([version of bison])
 changequote(<<,>>)dnl
-      ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
-      case $ac_prog_version in
-        '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-        1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
+        ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
+        case $ac_prog_version in
+          ('') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+          (1.2[6-9]*|1.[3-9][0-9]*|[2-9].*)
 changequote([,])dnl
-           ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-        *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-      esac
-    AC_MSG_RESULT([$ac_prog_version])
-    fi
-    if test $ac_verc_fail = yes; then
-      INTLBISON=:
+             ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+          (*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+        esac
+      AC_MSG_RESULT([$ac_prog_version])
+      fi
+      if test $ac_verc_fail = yes; then
+        INTLBISON=:
+      fi
     fi
-  fi
 
-  dnl These rules are solely for the distribution goal.  While doing this
-  dnl we only have to keep exactly one list of the available catalogs
-  dnl in configure.in.
-  for lang in $ALL_LINGUAS; do
-    GMOFILES="$GMOFILES $lang.gmo"
-    POFILES="$POFILES $lang.po"
-  done
+    dnl These rules are solely for the distribution goal.  While doing this
+    dnl we only have to keep exactly one list of the available catalogs
+    dnl in configure.in.
+    for lang in $ALL_LINGUAS; do
+      GMOFILES="$GMOFILES $lang.gmo"
+      POFILES="$POFILES $lang.po"
+    done
+  fi
 
   dnl Make all variables we use known to autoconf.
   AC_SUBST(BUILD_INCLUDED_LIBINTL)
@@ -590,7 +612,7 @@ changequote([,])dnl
   AC_SUBST(GENCAT)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ACVERSION_CHECK version: 4 updated: 2013/03/04 19:52:56
+dnl CF_ACVERSION_CHECK version: 5 updated: 2014/06/04 19:11:49
 dnl ------------------
 dnl Conditionally generate script according to whether we're using a given autoconf.
 dnl
@@ -599,7 +621,7 @@ dnl $2 = code to use if AC_ACVERSION is at least as high as $1.
 dnl $3 = code to use if AC_ACVERSION is older than $1.
 define([CF_ACVERSION_CHECK],
 [
-ifdef([AC_ACVERSION], ,[m4_copy([m4_PACKAGE_VERSION],[AC_ACVERSION])])dnl
+ifdef([AC_ACVERSION], ,[ifdef([AC_AUTOCONF_VERSION],[m4_copy([AC_AUTOCONF_VERSION],[AC_ACVERSION])],[m4_copy([m4_PACKAGE_VERSION],[AC_ACVERSION])])])dnl
 ifdef([m4_version_compare],
 [m4_if(m4_version_compare(m4_defn([AC_ACVERSION]), [$1]), -1, [$3], [$2])],
 [CF_ACVERSION_COMPARE(
@@ -616,7 +638,7 @@ define([CF_ACVERSION_COMPARE],
 [ifelse([$8], , ,[$8])],
 [ifelse([$9], , ,[$9])])])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_CFLAGS version: 10 updated: 2010/05/26 05:38:42
+dnl CF_ADD_CFLAGS version: 13 updated: 2017/02/25 18:57:40
 dnl -------------
 dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
 dnl The second parameter if given makes this macro verbose.
@@ -634,51 +656,51 @@ cf_new_extra_cppflags=
 for cf_add_cflags in $1
 do
 case $cf_fix_cppflags in
-no)
-	case $cf_add_cflags in #(vi
-	-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C) #(vi
+(no)
+	case $cf_add_cflags in
+	(-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
 		case $cf_add_cflags in
-		-D*)
+		(-D*)
 			cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`
 
-			test "${cf_add_cflags}" != "${cf_tst_cflags}" \
+			test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
 				&& test -z "${cf_tst_cflags}" \
 				&& cf_fix_cppflags=yes
 
 			if test $cf_fix_cppflags = yes ; then
-				cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"
+				CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
 				continue
 			elif test "${cf_tst_cflags}" = "\"'" ; then
-				cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"
+				CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
 				continue
 			fi
 			;;
 		esac
 		case "$CPPFLAGS" in
-		*$cf_add_cflags) #(vi
+		(*$cf_add_cflags)
 			;;
-		*) #(vi
-			case $cf_add_cflags in #(vi
-			-D*)
+		(*)
+			case $cf_add_cflags in
+			(-D*)
 				cf_tst_cppflags=`echo "x$cf_add_cflags" | sed -e 's/^...//' -e 's/=.*//'`
 				CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,$cf_tst_cppflags)
 				;;
 			esac
-			cf_new_cppflags="$cf_new_cppflags $cf_add_cflags"
+			CF_APPEND_TEXT(cf_new_cppflags,$cf_add_cflags)
 			;;
 		esac
 		;;
-	*)
-		cf_new_cflags="$cf_new_cflags $cf_add_cflags"
+	(*)
+		CF_APPEND_TEXT(cf_new_cflags,$cf_add_cflags)
 		;;
 	esac
 	;;
-yes)
-	cf_new_extra_cppflags="$cf_new_extra_cppflags $cf_add_cflags"
+(yes)
+	CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
 
 	cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^[[^"]]*"'\''//'`
 
-	test "${cf_add_cflags}" != "${cf_tst_cflags}" \
+	test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
 		&& test -z "${cf_tst_cflags}" \
 		&& cf_fix_cppflags=no
 	;;
@@ -687,24 +709,24 @@ done
 
 if test -n "$cf_new_cflags" ; then
 	ifelse([$2],,,[CF_VERBOSE(add to \$CFLAGS $cf_new_cflags)])
-	CFLAGS="$CFLAGS $cf_new_cflags"
+	CF_APPEND_TEXT(CFLAGS,$cf_new_cflags)
 fi
 
 if test -n "$cf_new_cppflags" ; then
 	ifelse([$2],,,[CF_VERBOSE(add to \$CPPFLAGS $cf_new_cppflags)])
-	CPPFLAGS="$CPPFLAGS $cf_new_cppflags"
+	CF_APPEND_TEXT(CPPFLAGS,$cf_new_cppflags)
 fi
 
 if test -n "$cf_new_extra_cppflags" ; then
 	ifelse([$2],,,[CF_VERBOSE(add to \$EXTRA_CPPFLAGS $cf_new_extra_cppflags)])
-	EXTRA_CPPFLAGS="$cf_new_extra_cppflags $EXTRA_CPPFLAGS"
+	CF_APPEND_TEXT(EXTRA_CPPFLAGS,$cf_new_extra_cppflags)
 fi
 
 AC_SUBST(EXTRA_CPPFLAGS)
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_INCDIR version: 13 updated: 2010/05/26 16:44:57
+dnl CF_ADD_INCDIR version: 15 updated: 2018/06/20 20:23:13
 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,
@@ -735,7 +757,7 @@ if test -n "$1" ; then
 			if test "$GCC" = yes
 			then
 			  cf_save_CPPFLAGS=$CPPFLAGS
-			  CPPFLAGS="$CPPFLAGS -I$cf_add_incdir"
+			  CF_APPEND_TEXT(CPPFLAGS,-I$cf_add_incdir)
 			  AC_TRY_COMPILE([#include <stdio.h>],
 				  [printf("Hello")],
 				  [],
@@ -755,6 +777,8 @@ if test -n "$1" ; then
 		else
 		  break
 		fi
+	  else
+		break
 	  fi
 	done
   done
@@ -769,7 +793,7 @@ 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: 9 updated: 2010/05/26 16:44:57
+dnl CF_ADD_LIBDIR version: 10 updated: 2015/04/18 08:56:57
 dnl -------------
 dnl	Adds to the library-path
 dnl
@@ -781,39 +805,70 @@ dnl
 AC_DEFUN([CF_ADD_LIBDIR],
 [
 if test -n "$1" ; then
-  for cf_add_libdir in $1
-  do
-    if test $cf_add_libdir = /usr/lib ; then
-      :
-    elif test -d $cf_add_libdir
-    then
-      cf_have_libdir=no
-      if test -n "$LDFLAGS$LIBS" ; then
-        # a loop is needed to ensure we can add subdirs of existing dirs
-        for cf_test_libdir in $LDFLAGS $LIBS ; do
-          if test ".$cf_test_libdir" = ".-L$cf_add_libdir" ; then
-            cf_have_libdir=yes; break
-          fi
-        done
-      fi
-      if test "$cf_have_libdir" = no ; then
-        CF_VERBOSE(adding $cf_add_libdir to library-path)
-        ifelse([$2],,LDFLAGS,[$2])="-L$cf_add_libdir $ifelse([$2],,LDFLAGS,[$2])"
-      fi
-    fi
-  done
+	for cf_add_libdir in $1
+	do
+		if test $cf_add_libdir = /usr/lib ; then
+			:
+		elif test -d $cf_add_libdir
+		then
+			cf_have_libdir=no
+			if test -n "$LDFLAGS$LIBS" ; then
+				# a loop is needed to ensure we can add subdirs of existing dirs
+				for cf_test_libdir in $LDFLAGS $LIBS ; do
+					if test ".$cf_test_libdir" = ".-L$cf_add_libdir" ; then
+						cf_have_libdir=yes; break
+					fi
+				done
+			fi
+			if test "$cf_have_libdir" = no ; then
+				CF_VERBOSE(adding $cf_add_libdir to library-path)
+				ifelse([$2],,LDFLAGS,[$2])="-L$cf_add_libdir $ifelse([$2],,LDFLAGS,[$2])"
+			fi
+		fi
+	done
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_LIBS version: 1 updated: 2010/06/02 05:03:05
+dnl CF_ADD_LIBS version: 2 updated: 2014/07/13 14:33:27
 dnl -----------
-dnl Add one or more libraries, used to enforce consistency.
+dnl Add one or more libraries, used to enforce consistency.  Libraries are
+dnl prepended to an existing list, since their dependencies are assumed to
+dnl already exist in the list.
 dnl
 dnl $1 = libraries to add, with the "-l", etc.
 dnl $2 = variable to update (default $LIBS)
-AC_DEFUN([CF_ADD_LIBS],[ifelse($2,,LIBS,[$2])="$1 [$]ifelse($2,,LIBS,[$2])"])dnl
+AC_DEFUN([CF_ADD_LIBS],[
+cf_add_libs="$1"
+# Filter out duplicates - this happens with badly-designed ".pc" files...
+for cf_add_1lib in [$]ifelse($2,,LIBS,[$2])
+do
+	for cf_add_2lib in $cf_add_libs
+	do
+		if test "x$cf_add_1lib" = "x$cf_add_2lib"
+		then
+			cf_add_1lib=
+			break
+		fi
+	done
+	test -n "$cf_add_1lib" && cf_add_libs="$cf_add_libs $cf_add_1lib"
+done
+ifelse($2,,LIBS,[$2])="$cf_add_libs"
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_ADD_LIB_AFTER version: 3 updated: 2013/07/09 21:27:22
+dnl ----------------
+dnl Add a given library after another, e.g., following the one it satisfies a
+dnl dependency for.
+dnl
+dnl $1 = the first library
+dnl $2 = its dependency
+AC_DEFUN([CF_ADD_LIB_AFTER],[
+CF_VERBOSE(...before $LIBS)
+LIBS=`echo "$LIBS" | sed -e "s/[[ 	]][[ 	]]*/ /g" -e "s%$1 %$1 $2 %" -e 's%  % %g'`
+CF_VERBOSE(...after  $LIBS)
+])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_OPTIONAL_PATH version: 1 updated: 2007/07/29 12:33:33
+dnl CF_ADD_OPTIONAL_PATH version: 3 updated: 2015/05/10 19:52:14
 dnl --------------------
 dnl Add an optional search-path to the compile/link variables.
 dnl See CF_WITH_PATH
@@ -821,15 +876,15 @@ dnl
 dnl $1 = shell variable containing the result of --with-XXX=[DIR]
 dnl $2 = module to look for.
 AC_DEFUN([CF_ADD_OPTIONAL_PATH],[
-  case "$1" in #(vi
-  no) #(vi
-      ;;
-  yes) #(vi
-      ;;
-  *)
-      CF_ADD_SEARCHPATH([$1], [AC_MSG_ERROR(cannot find $2 under $1)])
-      ;;
-  esac
+case "$1" in
+(no)
+	;;
+(yes)
+	;;
+(*)
+	CF_ADD_SEARCHPATH([$1], [AC_MSG_ERROR(cannot find $2 under $1)])
+	;;
+esac
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_ADD_SEARCHPATH version: 5 updated: 2009/01/11 20:40:21
@@ -862,7 +917,7 @@ $2])
 done
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_SUBDIR_PATH version: 3 updated: 2010/07/03 20:58:12
+dnl CF_ADD_SUBDIR_PATH version: 4 updated: 2013/10/08 17:47:05
 dnl ------------------
 dnl Append to a search-list for a nonstandard header/lib-file
 dnl	$1 = the variable to return as result
@@ -872,9 +927,9 @@ dnl $4 = the directory under which we will test for subdirectories
 dnl $5 = a directory that we do not want $4 to match
 AC_DEFUN([CF_ADD_SUBDIR_PATH],
 [
-test "$4" != "$5" && \
+test "x$4" != "x$5" && \
 test -d "$4" && \
-ifelse([$5],NONE,,[(test $5 = NONE || test "$4" != "$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"
@@ -884,6 +939,16 @@ ifelse([$5],NONE,,[(test $5 = NONE || test "$4" != "$5") &&]) {
 }
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_APPEND_TEXT version: 1 updated: 2017/02/25 18:58:55
+dnl --------------
+dnl use this macro for appending text without introducing an extra blank at
+dnl the beginning
+define([CF_APPEND_TEXT],
+[
+	test -n "[$]$1" && $1="[$]$1 "
+	$1="[$]{$1}$2"
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
 dnl --------------
 dnl Allow user to disable a normally-on option.
@@ -912,7 +977,7 @@ ifelse($5,,[	:],$5)
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ARG_OPTION version: 4 updated: 2010/05/26 05:38:42
+dnl CF_ARG_OPTION version: 5 updated: 2015/05/10 19:52:14
 dnl -------------
 dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
 dnl values.
@@ -925,17 +990,74 @@ dnl $4 = action if perform if option is default
 dnl $5 = default option value (either 'yes' or 'no')
 AC_DEFUN([CF_ARG_OPTION],
 [AC_ARG_ENABLE([$1],[$2],[test "$enableval" != ifelse([$5],no,yes,no) && enableval=ifelse([$5],no,no,yes)
-  if test "$enableval" != "$5" ; then
+	if test "$enableval" != "$5" ; then
 ifelse([$3],,[    :]dnl
 ,[    $3]) ifelse([$4],,,[
-  else
-    $4])
-  fi],[enableval=$5 ifelse([$4],,,[
-  $4
+	else
+		$4])
+	fi],[enableval=$5 ifelse([$4],,,[
+	$4
 ])dnl
-  ])])dnl
+])])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_BUNDLED_INTL version: 17 updated: 2012/10/06 08:57:51
+dnl CF_AR_FLAGS version: 6 updated: 2015/10/10 15:25:05
+dnl -----------
+dnl Check for suitable "ar" (archiver) options for updating an archive.
+dnl
+dnl In particular, handle some obsolete cases where the "-" might be omitted,
+dnl as well as a workaround for breakage of make's archive rules by the GNU
+dnl binutils "ar" program.
+AC_DEFUN([CF_AR_FLAGS],[
+AC_REQUIRE([CF_PROG_AR])
+
+AC_CACHE_CHECK(for options to update archives, cf_cv_ar_flags,[
+	cf_cv_ar_flags=unknown
+	for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
+	do
+
+		# check if $ARFLAGS already contains this choice
+		if test "x$ARFLAGS" != "x" ; then
+			cf_check_ar_flags=`echo "x$ARFLAGS" | sed -e "s/$cf_ar_flags\$//" -e "s/$cf_ar_flags / /"`
+			if test "x$ARFLAGS" != "$cf_check_ar_flags" ; then
+				cf_cv_ar_flags=
+				break
+			fi
+		fi
+
+		rm -f conftest.$ac_cv_objext
+		rm -f conftest.a
+
+		cat >conftest.$ac_ext <<EOF
+#line __oline__ "configure"
+int	testdata[[3]] = { 123, 456, 789 };
+EOF
+		if AC_TRY_EVAL(ac_compile) ; then
+			echo "$AR $ARFLAGS $cf_ar_flags conftest.a conftest.$ac_cv_objext" >&AC_FD_CC
+			$AR $ARFLAGS $cf_ar_flags conftest.a conftest.$ac_cv_objext 2>&AC_FD_CC 1>/dev/null
+			if test -f conftest.a ; then
+				cf_cv_ar_flags=$cf_ar_flags
+				break
+			fi
+		else
+			CF_VERBOSE(cannot compile test-program)
+			break
+		fi
+	done
+	rm -f conftest.a conftest.$ac_ext conftest.$ac_cv_objext
+])
+
+if test -n "$ARFLAGS" ; then
+	if test -n "$cf_cv_ar_flags" ; then
+		ARFLAGS="$ARFLAGS $cf_cv_ar_flags"
+	fi
+else
+	ARFLAGS=$cf_cv_ar_flags
+fi
+
+AC_SUBST(ARFLAGS)
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_BUNDLED_INTL version: 19 updated: 2018/06/20 20:23:13
 dnl ---------------
 dnl Top-level macro for configuring an application with a bundled copy of
 dnl the intl and po directories for gettext.
@@ -1004,7 +1126,7 @@ dnl this updates SUB_MAKEFILE and MSG_DIR_MAKE:
 CF_OUR_MESSAGES($1)
 
 if test "$USE_INCLUDED_LIBINTL" = yes ; then
-        if test "$nls_cv_force_use_gnu_gettext" = yes ; then
+	if test "$nls_cv_force_use_gnu_gettext" = yes ; then
 		:
 	elif test "$nls_cv_use_gnu_gettext" = yes ; then
 		:
@@ -1031,7 +1153,7 @@ else
 fi
 
 if test -z "$INTLDIR_MAKE" ; then
-	CPPFLAGS="$CPPFLAGS -I../intl"
+	CF_APPEND_TEXT(CPPFLAGS,-I../intl)
 fi
 
 dnl FIXME:  we use this in lynx (the alternative is a spurious dependency upon
@@ -1065,27 +1187,48 @@ if test "$USE_INCLUDED_LIBINTL" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CC_ENV_FLAGS version: 1 updated: 2012/10/03 05:25:49
+dnl CF_CC_ENV_FLAGS version: 8 updated: 2017/09/23 08:50:24
 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 with
-dnl options, but eliminates a more common category of user confusion.
+dnl into CC.  This will not help with broken scripts that wrap the compiler
+dnl with options, but eliminates a more common category of user confusion.
+dnl
+dnl In particular, it addresses the problem of being able to run the C
+dnl preprocessor in a consistent manner.
+dnl
+dnl Caveat: this also disallows blanks in the pathname for the compiler, but
+dnl the nuisance of having inconsistent settings for compiler and preprocessor
+dnl outweighs that limitation.
 AC_DEFUN([CF_CC_ENV_FLAGS],
 [
 # This should have been defined by AC_PROG_CC
 : ${CC:=cc}
 
 AC_MSG_CHECKING(\$CC variable)
-case "$CC" in #(vi
-*[[\ \	]]-[[IUD]]*)
+case "$CC" in
+(*[[\ \	]]-*)
 	AC_MSG_RESULT(broken)
 	AC_MSG_WARN(your environment misuses the CC variable to hold CFLAGS/CPPFLAGS options)
 	# humor him...
-	cf_flags=`echo "$CC" | sed -e 's/^[[^ 	]]*[[ 	]]//'`
-	CC=`echo "$CC" | sed -e 's/[[ 	]].*//'`
-	CF_ADD_CFLAGS($cf_flags)
+	cf_prog=`echo "$CC" | sed -e 's/	/ /g' -e 's/[[ ]]* / /g' -e 's/[[ ]]*[[ ]]-[[^ ]].*//'`
+	cf_flags=`echo "$CC" | ${AWK:-awk} -v prog="$cf_prog" '{ printf("%s", [substr]([$]0,1+length(prog))); }'`
+	CC="$cf_prog"
+	for cf_arg in $cf_flags
+	do
+		case "x$cf_arg" in
+		(x-[[IUDfgOW]]*)
+			CF_ADD_CFLAGS($cf_arg)
+			;;
+		(*)
+			CC="$CC $cf_arg"
+			;;
+		esac
+	done
+	CF_VERBOSE(resulting CC: '$CC')
+	CF_VERBOSE(resulting CFLAGS: '$CFLAGS')
+	CF_VERBOSE(resulting CPPFLAGS: '$CPPFLAGS')
 	;;
-*)
+(*)
 	AC_MSG_RESULT(ok)
 	;;
 esac
@@ -1126,6 +1269,28 @@ 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 ---------------
+dnl Conditionally add to $CFLAGS and $CPPFLAGS values which are derived from
+dnl a build-configuration such as imake.  These have the pitfall that they
+dnl often contain compiler-specific options which we cannot use, mixed with
+dnl preprocessor options that we usually can.
+AC_DEFUN([CF_CHECK_CFLAGS],
+[
+CF_VERBOSE(checking additions to CFLAGS)
+cf_check_cflags="$CFLAGS"
+cf_check_cppflags="$CPPFLAGS"
+CF_ADD_CFLAGS($1,yes)
+if test "x$cf_check_cflags" != "x$CFLAGS" ; then
+AC_TRY_LINK([#include <stdio.h>],[printf("Hello world");],,
+	[CF_VERBOSE(test-compile failed.  Undoing change to \$CFLAGS)
+	 if test "x$cf_check_cppflags" != "x$CPPFLAGS" ; then
+		 CF_VERBOSE(but keeping change to \$CPPFLAGS)
+	 fi
+	 CFLAGS="$cf_check_flags"])
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_CHECK_LIBTOOL_VERSION version: 1 updated: 2013/04/06 18:03:09
 dnl ------------------------
 dnl Show the version of libtool
@@ -1147,7 +1312,7 @@ else
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CLANG_COMPILER version: 1 updated: 2012/06/16 14:55:39
+dnl CF_CLANG_COMPILER version: 2 updated: 2013/11/19 19:23:35
 dnl -----------------
 dnl Check if the given compiler is really clang.  clang's C driver defines
 dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
@@ -1158,7 +1323,7 @@ dnl ensure that it is not mistaken for gcc/g++.  It is normally invoked from
 dnl the wrappers for gcc and g++ warnings.
 dnl
 dnl $1 = GCC (default) or GXX
-dnl $2 = INTEL_COMPILER (default) or INTEL_CPLUSPLUS
+dnl $2 = CLANG_COMPILER (default)
 dnl $3 = CFLAGS (default) or CXXFLAGS
 AC_DEFUN([CF_CLANG_COMPILER],[
 ifelse([$2],,CLANG_COMPILER,[$2])=no
@@ -1216,22 +1381,22 @@ CF_NCURSES_VERSION
 CF_CURSES_LIBS
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_CPPFLAGS version: 11 updated: 2011/04/09 14:51:08
+dnl CF_CURSES_CPPFLAGS version: 13 updated: 2018/06/20 20:23:13
 dnl ------------------
 dnl Look for the curses headers.
 AC_DEFUN([CF_CURSES_CPPFLAGS],[
 
 AC_CACHE_CHECK(for extra include directories,cf_cv_curses_incdir,[
 cf_cv_curses_incdir=no
-case $host_os in #(vi
-hpux10.*) #(vi
+case $host_os in
+(hpux10.*)
 	if test "x$cf_cv_screen" = "xcurses_colr"
 	then
 		test -d /usr/include/curses_colr && \
 		cf_cv_curses_incdir="-I/usr/include/curses_colr"
 	fi
 	;;
-sunos3*|sunos4*)
+(sunos3*|sunos4*)
 	if test "x$cf_cv_screen" = "xcurses_5lib"
 	then
 		test -d /usr/5lib && \
@@ -1241,13 +1406,16 @@ sunos3*|sunos4*)
 	;;
 esac
 ])
-test "$cf_cv_curses_incdir" != no && CPPFLAGS="$CPPFLAGS $cf_cv_curses_incdir"
+if test "$cf_cv_curses_incdir" != no
+then
+	CF_APPEND_TEXT(CPPFLAGS,$cf_cv_curses_incdir)
+fi
 
 CF_CURSES_HEADER
 CF_TERM_HEADER
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_FUNCS version: 17 updated: 2011/05/14 16:07:29
+dnl CF_CURSES_FUNCS version: 19 updated: 2018/01/03 04:47:33
 dnl ---------------
 dnl Curses-functions are a little complicated, since a lot of them are macros.
 AC_DEFUN([CF_CURSES_FUNCS],
@@ -1268,8 +1436,9 @@ do
 			[
 #ifndef ${cf_func}
 long foo = (long)(&${cf_func});
-if (foo + 1234 > 5678)
-	${cf_cv_main_return:-return}(foo);
+fprintf(stderr, "testing linkage of $cf_func:%p\n", (void *)foo);
+if (foo + 1234L > 5678L)
+	${cf_cv_main_return:-return}(foo != 0);
 #endif
 			],
 			[cf_result=yes],
@@ -1286,7 +1455,7 @@ if (foo + 1234 > 5678)
 done
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_HEADER version: 3 updated: 2011/05/01 19:47:45
+dnl CF_CURSES_HEADER version: 5 updated: 2015/04/23 20:35:30
 dnl ----------------
 dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
 dnl variations of ncurses' installs.
@@ -1295,11 +1464,9 @@ dnl $1 = ncurses when looking for ncurses, or is empty
 AC_DEFUN([CF_CURSES_HEADER],[
 AC_CACHE_CHECK(if we have identified curses headers,cf_cv_ncurses_header,[
 cf_cv_ncurses_header=none
-for cf_header in ifelse($1,,,[ \
-    $1/ncurses.h \
-	$1/curses.h]) \
-	ncurses.h \
-	curses.h ifelse($1,,[ncurses/ncurses.h ncurses/curses.h])
+for cf_header in \
+	ncurses.h ifelse($1,,,[$1/ncurses.h]) \
+	curses.h ifelse($1,,,[$1/curses.h]) ifelse($1,,[ncurses/ncurses.h ncurses/curses.h])
 do
 AC_TRY_COMPILE([#include <${cf_header}>],
 	[initscr(); tgoto("?", 0,0)],
@@ -1315,7 +1482,7 @@ fi
 AC_CHECK_HEADERS($cf_cv_ncurses_header)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_LIBS version: 37 updated: 2013/02/09 17:33:50
+dnl CF_CURSES_LIBS version: 42 updated: 2018/06/20 20:23:13
 dnl --------------
 dnl Look for the curses libraries.  Older curses implementations may require
 dnl termcap/termlib to be linked as well.  Call CF_CURSES_CPPFLAGS first.
@@ -1324,17 +1491,17 @@ AC_DEFUN([CF_CURSES_LIBS],[
 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
 AC_MSG_CHECKING(if we have identified curses libraries)
 AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-    [initscr(); tgoto("?", 0,0)],
-    cf_result=yes,
-    cf_result=no)
+	[initscr(); tgoto("?", 0,0)],
+	cf_result=yes,
+	cf_result=no)
 AC_MSG_RESULT($cf_result)
 
 if test "$cf_result" = no ; then
-case $host_os in #(vi
-freebsd*) #(vi
-    AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
-    ;;
-hpux10.*) #(vi
+case $host_os in
+(freebsd*)
+	AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
+	;;
+(hpux10.*)
 	# Looking at HPUX 10.20, the Hcurses library is the oldest (1997), cur_colr
 	# next (1998), and xcurses "newer" (2000).  There is no header file for
 	# Hcurses; the subdirectory curses_colr has the headers (curses.h and
@@ -1348,14 +1515,14 @@ hpux10.*) #(vi
 		AC_CHECK_LIB(Hcurses,initscr,[
 			# HP's header uses __HP_CURSES, but user claims _HP_CURSES.
 			CF_ADD_LIBS(-lHcurses)
-			CPPFLAGS="$CPPFLAGS -D__HP_CURSES -D_HP_CURSES"
+			CF_APPEND_TEXT(CPPFLAGS,-D__HP_CURSES -D_HP_CURSES)
 			ac_cv_func_initscr=yes
 			])])
 	fi
 	;;
-linux*)
+(linux*)
 	case `arch 2>/dev/null` in
-	x86_64)
+	(x86_64)
 		if test -d /lib64
 		then
 			CF_ADD_LIBDIR(/lib64)
@@ -1363,21 +1530,21 @@ linux*)
 			CF_ADD_LIBDIR(/lib)
 		fi
 		;;
-	*)
+	(*)
 		CF_ADD_LIBDIR(/lib)
 		;;
 	esac
 	;;
-sunos3*|sunos4*)
+(sunos3*|sunos4*)
 	if test "x$cf_cv_screen" = "xcurses_5lib"
 	then
 		if test -d /usr/5lib ; then
 			CF_ADD_LIBDIR(/usr/5lib)
 			CF_ADD_LIBS(-lcurses -ltermcap)
 		fi
-    fi
-    ac_cv_func_initscr=yes
-    ;;
+	fi
+	ac_cv_func_initscr=yes
+	;;
 esac
 
 if test ".$ac_cv_func_initscr" != .yes ; then
@@ -1397,7 +1564,10 @@ if test ".$ac_cv_func_initscr" != .yes ; then
 		AC_CHECK_FUNC(tgoto,[cf_term_lib=predefined],[
 			for cf_term_lib in $cf_check_list otermcap termcap tinfo termlib unknown
 			do
-				AC_CHECK_LIB($cf_term_lib,tgoto,[break])
+				AC_CHECK_LIB($cf_term_lib,tgoto,[
+					: ${cf_nculib_root:=$cf_term_lib}
+					break
+				])
 			done
 		])
 	fi
@@ -1408,42 +1578,41 @@ if test ".$ac_cv_func_initscr" != .yes ; then
 	then
 		for cf_curs_lib in $cf_check_list xcurses jcurses pdcurses unknown
 		do
-			AC_CHECK_LIB($cf_curs_lib,initscr,[break])
+			LIBS="-l$cf_curs_lib $cf_save_LIBS"
+			if test "$cf_term_lib" = unknown || test "$cf_term_lib" = "$cf_curs_lib" ; then
+				AC_MSG_CHECKING(if we can link with $cf_curs_lib library)
+				AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
+					[initscr()],
+					[cf_result=yes],
+					[cf_result=no])
+				AC_MSG_RESULT($cf_result)
+				test $cf_result = yes && break
+			elif test "$cf_curs_lib" = "$cf_term_lib" ; then
+				cf_result=no
+			elif test "$cf_term_lib" != predefined ; then
+				AC_MSG_CHECKING(if we need both $cf_curs_lib and $cf_term_lib libraries)
+				AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
+					[initscr(); tgoto((char *)0, 0, 0);],
+					[cf_result=no],
+					[
+					LIBS="-l$cf_curs_lib -l$cf_term_lib $cf_save_LIBS"
+					AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
+						[initscr()],
+						[cf_result=yes],
+						[cf_result=error])
+					])
+				AC_MSG_RESULT($cf_result)
+				test $cf_result != error && break
+			fi
 		done
 	fi
 	test $cf_curs_lib = unknown && AC_MSG_ERROR(no curses library found)
-
-	LIBS="-l$cf_curs_lib $cf_save_LIBS"
-	if test "$cf_term_lib" = unknown ; then
-		AC_MSG_CHECKING(if we can link with $cf_curs_lib library)
-		AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-			[initscr()],
-			[cf_result=yes],
-			[cf_result=no])
-		AC_MSG_RESULT($cf_result)
-		test $cf_result = no && AC_MSG_ERROR(Cannot link curses library)
-	elif test "$cf_curs_lib" = "$cf_term_lib" ; then
-		:
-	elif test "$cf_term_lib" != predefined ; then
-		AC_MSG_CHECKING(if we need both $cf_curs_lib and $cf_term_lib libraries)
-		AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-			[initscr(); tgoto((char *)0, 0, 0);],
-			[cf_result=no],
-			[
-			LIBS="-l$cf_curs_lib -l$cf_term_lib $cf_save_LIBS"
-			AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
-				[initscr()],
-				[cf_result=yes],
-				[cf_result=error])
-			])
-		AC_MSG_RESULT($cf_result)
-	fi
 fi
 fi
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_TERM_H version: 10 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_TERM_H version: 11 updated: 2015/04/15 19:08:48
 dnl ----------------
 dnl SVr4 curses should have term.h as well (where it puts the definitions of
 dnl the low-level interface).  This may not be true in old/broken implementations,
@@ -1460,8 +1629,8 @@ 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 #(vi
-*/*)
+case ${cf_cv_ncurses_header:-curses.h} in
+(*/*)
 	cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`term.h
 	cf_header_list="$cf_header_item $cf_header_list"
 	;;
@@ -1478,8 +1647,8 @@ do
 	[cf_cv_term_header=no])
 done
 
-case $cf_cv_term_header in #(vi
-no)
+case $cf_cv_term_header in
+(no)
 	# If curses is ncurses, some packagers still mess it up by trying to make
 	# us use GNU termcap.  This handles the most common case.
 	for cf_header in ncurses/term.h ncursesw/term.h
@@ -1500,20 +1669,20 @@ make an error
 esac
 ])
 
-case $cf_cv_term_header in #(vi
-term.h) #(vi
+case $cf_cv_term_header in
+(term.h)
 	AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
 	;;
-ncurses/term.h) #(vi
+(ncurses/term.h)
 	AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
 	;;
-ncursesw/term.h)
+(ncursesw/term.h)
 	AC_DEFINE(HAVE_NCURSESW_TERM_H,1,[Define to 1 if we have ncursesw/term.h])
 	;;
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_UNCTRL_H version: 2 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_UNCTRL_H version: 4 updated: 2015/04/15 19:08:48
 dnl ------------------
 dnl Any X/Open curses implementation must have unctrl.h, but ncurses packages
 dnl may put it in a subdirectory (along with ncurses' other headers, of
@@ -1530,8 +1699,8 @@ 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 #(vi
-*/*)
+case ${cf_cv_ncurses_header:-curses.h} in
+(*/*)
 	cf_header_item=`echo ${cf_cv_ncurses_header:-curses.h} | sed -e 's%\..*%%' -e 's%/.*%/%'`unctrl.h
 	cf_header_list="$cf_header_item $cf_header_list"
 	;;
@@ -1547,22 +1716,22 @@ do
 	 break],
 	[cf_cv_unctrl_header=no])
 done
+])
 
-case $cf_cv_unctrl_header in #(vi
-no)
+case $cf_cv_unctrl_header in
+(no)
 	AC_MSG_WARN(unctrl.h header not found)
 	;;
 esac
-])
 
-case $cf_cv_unctrl_header in #(vi
-unctrl.h) #(vi
+case $cf_cv_unctrl_header in
+(unctrl.h)
 	AC_DEFINE(HAVE_UNCTRL_H,1,[Define to 1 if we have unctrl.h])
 	;;
-ncurses/unctrl.h) #(vi
+(ncurses/unctrl.h)
 	AC_DEFINE(HAVE_NCURSES_UNCTRL_H,1,[Define to 1 if we have ncurses/unctrl.h])
 	;;
-ncursesw/unctrl.h)
+(ncursesw/unctrl.h)
 	AC_DEFINE(HAVE_NCURSESW_UNCTRL_H,1,[Define to 1 if we have ncursesw/unctrl.h])
 	;;
 esac
@@ -1654,7 +1823,7 @@ dnl ----------
 dnl "dirname" is not portable, so we fake it with a shell script.
 AC_DEFUN([CF_DIRNAME],[$1=`echo $2 | sed -e 's%/[[^/]]*$%%'`])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_DISABLE_ECHO version: 12 updated: 2012/10/06 16:30:28
+dnl CF_DISABLE_ECHO version: 13 updated: 2015/04/18 08:56:57
 dnl ---------------
 dnl You can always use "make -n" to see the actual options, but it's hard to
 dnl pick out/analyze warning messages when the compile-line is long.
@@ -1671,17 +1840,17 @@ AC_MSG_CHECKING(if you want to see long compiling messages)
 CF_ARG_DISABLE(echo,
 	[  --disable-echo          do not display "compiling" commands],
 	[
-    ECHO_LT='--silent'
-    ECHO_LD='@echo linking [$]@;'
-    RULE_CC='@echo compiling [$]<'
-    SHOW_CC='@echo compiling [$]@'
-    ECHO_CC='@'
+	ECHO_LT='--silent'
+	ECHO_LD='@echo linking [$]@;'
+	RULE_CC='@echo compiling [$]<'
+	SHOW_CC='@echo compiling [$]@'
+	ECHO_CC='@'
 ],[
-    ECHO_LT=''
-    ECHO_LD=''
-    RULE_CC=''
-    SHOW_CC=''
-    ECHO_CC=''
+	ECHO_LT=''
+	ECHO_LD=''
+	RULE_CC=''
+	SHOW_CC=''
+	ECHO_CC=''
 ])
 AC_MSG_RESULT($enableval)
 AC_SUBST(ECHO_LT)
@@ -1691,7 +1860,7 @@ AC_SUBST(SHOW_CC)
 AC_SUBST(ECHO_CC)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_DISABLE_LIBTOOL_VERSION version: 1 updated: 2010/05/15 15:45:59
+dnl CF_DISABLE_LIBTOOL_VERSION version: 3 updated: 2015/04/17 21:13:04
 dnl --------------------------
 dnl Check if we should use the libtool 1.5 feature "-version-number" instead of
 dnl the older "-version-info" feature.  The newer feature allows us to use
@@ -1710,8 +1879,25 @@ if test "$cf_libtool_version" = yes ; then
 	LIBTOOL_VERSION="-version-number"
 else
 	LIBTOOL_VERSION="-version-info"
+	case "x$VERSION" in
+	(x)
+		AC_MSG_WARN(VERSION was not set)
+		;;
+	(x*.*.*)
+		ABI_VERSION="$VERSION"
+		CF_VERBOSE(ABI_VERSION: $ABI_VERSION)
+		;;
+	(x*:*:*)
+		ABI_VERSION=`echo "$VERSION" | sed -e 's/:/./g'`
+		CF_VERBOSE(ABI_VERSION: $ABI_VERSION)
+		;;
+	(*)
+		AC_MSG_WARN(unexpected VERSION value: $VERSION)
+		;;
+	esac
 fi
 
+AC_SUBST(ABI_VERSION)
 AC_SUBST(LIBTOOL_VERSION)
 ])dnl
 dnl ---------------------------------------------------------------------------
@@ -1798,7 +1984,7 @@ fi
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_FIND_LINKAGE version: 19 updated: 2010/05/29 16:31:02
+dnl CF_FIND_LINKAGE version: 21 updated: 2018/06/20 20:23:13
 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.
@@ -1846,73 +2032,74 @@ AC_TRY_LINK([$1],[$2],[
 	cf_cv_find_linkage_$3=no
 	LIBS="$cf_save_LIBS"
 
-    CF_VERBOSE(find linkage for $3 library)
-    CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])
-
-    cf_save_CPPFLAGS="$CPPFLAGS"
-    cf_test_CPPFLAGS="$CPPFLAGS"
-
-    CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
-    for cf_cv_header_path_$3 in $cf_search
-    do
-      if test -d $cf_cv_header_path_$3 ; then
-        CF_VERBOSE(... testing $cf_cv_header_path_$3)
-        CPPFLAGS="$cf_save_CPPFLAGS -I$cf_cv_header_path_$3"
-        AC_TRY_COMPILE([$1],[$2],[
-            CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
-            cf_cv_find_linkage_$3=maybe
-            cf_test_CPPFLAGS="$CPPFLAGS"
-            break],[
-            CPPFLAGS="$cf_save_CPPFLAGS"
-            ])
-      fi
-    done
+	CF_VERBOSE(find linkage for $3 library)
+	CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])
 
-    if test "$cf_cv_find_linkage_$3" = maybe ; then
-
-      CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])
-
-      cf_save_LIBS="$LIBS"
-      cf_save_LDFLAGS="$LDFLAGS"
-
-      ifelse([$6],,,[
-        CPPFLAGS="$cf_test_CPPFLAGS"
-        LIBS="-l$3 $7 $cf_save_LIBS"
-        AC_TRY_LINK([$1],[$2],[
-            CF_VERBOSE(... found $3 library in system)
-            cf_cv_find_linkage_$3=yes])
-            CPPFLAGS="$cf_save_CPPFLAGS"
-            LIBS="$cf_save_LIBS"
-            ])
-
-      if test "$cf_cv_find_linkage_$3" != yes ; then
-        CF_LIBRARY_PATH(cf_search,$3)
-        for cf_cv_library_path_$3 in $cf_search
-        do
-          if test -d $cf_cv_library_path_$3 ; then
-            CF_VERBOSE(... testing $cf_cv_library_path_$3)
-            CPPFLAGS="$cf_test_CPPFLAGS"
-            LIBS="-l$3 $7 $cf_save_LIBS"
-            LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
-            AC_TRY_LINK([$1],[$2],[
-                CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
-                cf_cv_find_linkage_$3=yes
-                cf_cv_library_file_$3="-l$3"
-                break],[
-                CPPFLAGS="$cf_save_CPPFLAGS"
-                LIBS="$cf_save_LIBS"
-                LDFLAGS="$cf_save_LDFLAGS"
-                ])
-          fi
-        done
-        CPPFLAGS="$cf_save_CPPFLAGS"
-        LDFLAGS="$cf_save_LDFLAGS"
-      fi
+	cf_save_CPPFLAGS="$CPPFLAGS"
+	cf_test_CPPFLAGS="$CPPFLAGS"
 
-    else
-      cf_cv_find_linkage_$3=no
-    fi
-    ],$7)
+	CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
+	for cf_cv_header_path_$3 in $cf_search
+	do
+		if test -d $cf_cv_header_path_$3 ; then
+			CF_VERBOSE(... testing $cf_cv_header_path_$3)
+			CPPFLAGS="$cf_save_CPPFLAGS"
+			CF_APPEND_TEXT(CPPFLAGS,-I$cf_cv_header_path_$3)
+			AC_TRY_COMPILE([$1],[$2],[
+				CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
+				cf_cv_find_linkage_$3=maybe
+				cf_test_CPPFLAGS="$CPPFLAGS"
+				break],[
+				CPPFLAGS="$cf_save_CPPFLAGS"
+				])
+		fi
+	done
+
+	if test "$cf_cv_find_linkage_$3" = maybe ; then
+
+		CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])
+
+		cf_save_LIBS="$LIBS"
+		cf_save_LDFLAGS="$LDFLAGS"
+
+		ifelse([$6],,,[
+		CPPFLAGS="$cf_test_CPPFLAGS"
+		LIBS="-l$3 $7 $cf_save_LIBS"
+		AC_TRY_LINK([$1],[$2],[
+			CF_VERBOSE(... found $3 library in system)
+			cf_cv_find_linkage_$3=yes])
+			CPPFLAGS="$cf_save_CPPFLAGS"
+			LIBS="$cf_save_LIBS"
+			])
+
+		if test "$cf_cv_find_linkage_$3" != yes ; then
+			CF_LIBRARY_PATH(cf_search,$3)
+			for cf_cv_library_path_$3 in $cf_search
+			do
+				if test -d $cf_cv_library_path_$3 ; then
+					CF_VERBOSE(... testing $cf_cv_library_path_$3)
+					CPPFLAGS="$cf_test_CPPFLAGS"
+					LIBS="-l$3 $7 $cf_save_LIBS"
+					LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
+					AC_TRY_LINK([$1],[$2],[
+					CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
+					cf_cv_find_linkage_$3=yes
+					cf_cv_library_file_$3="-l$3"
+					break],[
+					CPPFLAGS="$cf_save_CPPFLAGS"
+					LIBS="$cf_save_LIBS"
+					LDFLAGS="$cf_save_LDFLAGS"
+					])
+				fi
+			done
+			CPPFLAGS="$cf_save_CPPFLAGS"
+			LDFLAGS="$cf_save_LDFLAGS"
+		fi
+
+	else
+		cf_cv_find_linkage_$3=no
+	fi
+	],$7)
 ])
 
 LIBS="$cf_save_LIBS"
@@ -1977,7 +2164,7 @@ if test $cf_cv_type_unionwait = yes; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_ATTRIBUTES version: 16 updated: 2012/10/02 20:55:03
+dnl CF_GCC_ATTRIBUTES version: 17 updated: 2015/04/12 15:39:00
 dnl -----------------
 dnl Test for availability of useful gcc __attribute__ directives to quiet
 dnl compiler warnings.  Though useful, not all are supported -- and contrary
@@ -2031,20 +2218,20 @@ EOF
 		cf_directive="__attribute__(($cf_attribute))"
 		echo "checking for $CC $cf_directive" 1>&AC_FD_CC
 
-		case $cf_attribute in #(vi
-		printf) #(vi
+		case $cf_attribute in
+		(printf)
 			cf_printf_attribute=yes
 			cat >conftest.h <<EOF
 #define GCC_$cf_ATTRIBUTE 1
 EOF
 			;;
-		scanf) #(vi
+		(scanf)
 			cf_scanf_attribute=yes
 			cat >conftest.h <<EOF
 #define GCC_$cf_ATTRIBUTE 1
 EOF
 			;;
-		*) #(vi
+		(*)
 			cat >conftest.h <<EOF
 #define GCC_$cf_ATTRIBUTE $cf_directive
 EOF
@@ -2054,11 +2241,11 @@ EOF
 		if AC_TRY_EVAL(ac_compile); then
 			test -n "$verbose" && AC_MSG_RESULT(... $cf_attribute)
 			cat conftest.h >>confdefs.h
-			case $cf_attribute in #(vi
-			noreturn) #(vi
+			case $cf_attribute in
+			(noreturn)
 				AC_DEFINE_UNQUOTED(GCC_NORETURN,$cf_directive,[Define to noreturn-attribute for gcc])
 				;;
-			printf) #(vi
+			(printf)
 				cf_value='/* nothing */'
 				if test "$cf_printf_attribute" != no ; then
 					cf_value='__attribute__((format(printf,fmt,var)))'
@@ -2066,7 +2253,7 @@ EOF
 				fi
 				AC_DEFINE_UNQUOTED(GCC_PRINTFLIKE(fmt,var),$cf_value,[Define to printf-attribute for gcc])
 				;;
-			scanf) #(vi
+			(scanf)
 				cf_value='/* nothing */'
 				if test "$cf_scanf_attribute" != no ; then
 					cf_value='__attribute__((format(scanf,fmt,var)))'
@@ -2074,7 +2261,7 @@ EOF
 				fi
 				AC_DEFINE_UNQUOTED(GCC_SCANFLIKE(fmt,var),$cf_value,[Define to sscanf-attribute for gcc])
 				;;
-			unused) #(vi
+			(unused)
 				AC_DEFINE_UNQUOTED(GCC_UNUSED,$cf_directive,[Define to unused-attribute for gcc])
 				;;
 			esac
@@ -2101,7 +2288,7 @@ if test "$GCC" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_WARNINGS version: 29 updated: 2012/06/16 14:55:39
+dnl CF_GCC_WARNINGS version: 33 updated: 2018/06/20 20:23:13
 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:
@@ -2173,10 +2360,14 @@ then
 	EXTRA_CFLAGS=
 	cf_warn_CONST=""
 	test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
+	cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
+	test "x$CLANG_COMPILER" = xyes && cf_gcc_warnings=
 	for cf_opt in W Wall \
 		Wbad-function-cast \
 		Wcast-align \
 		Wcast-qual \
+		Wdeclaration-after-statement \
+		Wextra \
 		Winline \
 		Wmissing-declarations \
 		Wmissing-prototypes \
@@ -2184,25 +2375,25 @@ then
 		Wpointer-arith \
 		Wshadow \
 		Wstrict-prototypes \
-		Wundef $cf_warn_CONST $1
+		Wundef $cf_gcc_warnings $cf_warn_CONST $1
 	do
 		CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
 		if AC_TRY_EVAL(ac_compile); then
 			test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
-			case $cf_opt in #(vi
-			Wcast-qual) #(vi
-				CPPFLAGS="$CPPFLAGS -DXTSTRINGDEFINES"
+			case $cf_opt in
+			(Wcast-qual)
+				CF_APPEND_TEXT(CPPFLAGS,-DXTSTRINGDEFINES)
 				;;
-			Winline) #(vi
+			(Winline)
 				case $GCC_VERSION in
-				[[34]].*)
+				([[34]].*)
 					CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
 					continue;;
 				esac
 				;;
-			Wpointer-arith) #(vi
+			(Wpointer-arith)
 				case $GCC_VERSION in
-				[[12]].*)
+				([[12]].*)
 					CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
 					continue;;
 				esac
@@ -2218,7 +2409,7 @@ rm -rf conftest*
 AC_SUBST(EXTRA_CFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GNU_SOURCE version: 6 updated: 2005/07/09 13:23:07
+dnl CF_GNU_SOURCE version: 9 updated: 2018/06/20 20:23:13
 dnl -------------
 dnl Check if we must define _GNU_SOURCE to get a reasonable value for
 dnl _XOPEN_SOURCE, upon which many POSIX definitions depend.  This is a defect
@@ -2226,26 +2417,102 @@ dnl (or misfeature) of glibc2, which breaks portability of many applications,
 dnl since it is interwoven with GNU extensions.
 dnl
 dnl Well, yes we could work around it...
+dnl
+dnl Parameters:
+dnl	$1 is the nominal value for _XOPEN_SOURCE
 AC_DEFUN([CF_GNU_SOURCE],
 [
-AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
+cf_gnu_xopen_source=ifelse($1,,500,$1)
+
+AC_CACHE_CHECK(if this is the GNU C library,cf_cv_gnu_library,[
 AC_TRY_COMPILE([#include <sys/types.h>],[
-#ifndef _XOPEN_SOURCE
-make an error
-#endif],
-	[cf_cv_gnu_source=no],
-	[cf_save="$CPPFLAGS"
-	 CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
-	 AC_TRY_COMPILE([#include <sys/types.h>],[
-#ifdef _XOPEN_SOURCE
-make an error
-#endif],
-	[cf_cv_gnu_source=no],
-	[cf_cv_gnu_source=yes])
-	CPPFLAGS="$cf_save"
-	])
+	#if __GLIBC__ > 0 && __GLIBC_MINOR__ >= 0
+		return 0;
+	#else
+	#	error not GNU C library
+	#endif],
+	[cf_cv_gnu_library=yes],
+	[cf_cv_gnu_library=no])
 ])
-test "$cf_cv_gnu_source" = yes && CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+
+if test x$cf_cv_gnu_library = xyes; then
+
+	# With glibc 2.19 (13 years after this check was begun), _DEFAULT_SOURCE
+	# was changed to help a little...
+	AC_CACHE_CHECK(if _DEFAULT_SOURCE can be used as a basis,cf_cv_gnu_library_219,[
+		cf_save="$CPPFLAGS"
+		CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
+		AC_TRY_COMPILE([#include <sys/types.h>],[
+			#if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) || (__GLIBC__ > 2)
+				return 0;
+			#else
+			#	error GNU C library __GLIBC__.__GLIBC_MINOR__ is too old
+			#endif],
+			[cf_cv_gnu_library_219=yes],
+			[cf_cv_gnu_library_219=no])
+		CPPFLAGS="$cf_save"
+	])
+
+	if test "x$cf_cv_gnu_library_219" = xyes; then
+		cf_save="$CPPFLAGS"
+		AC_CACHE_CHECK(if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE,cf_cv_gnu_dftsrc_219,[
+			CF_ADD_CFLAGS(-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=$cf_gnu_xopen_source)
+			AC_TRY_COMPILE([
+				#include <limits.h>
+				#include <sys/types.h>
+				],[
+				#if (_XOPEN_SOURCE >= $cf_gnu_xopen_source) && (MB_LEN_MAX > 1)
+					return 0;
+				#else
+				#	error GNU C library is too old
+				#endif],
+				[cf_cv_gnu_dftsrc_219=yes],
+				[cf_cv_gnu_dftsrc_219=no])
+			])
+		test "x$cf_cv_gnu_dftsrc_219" = "xyes" || CPPFLAGS="$cf_save"
+	else
+		cf_cv_gnu_dftsrc_219=maybe
+	fi
+
+	if test "x$cf_cv_gnu_dftsrc_219" != xyes; then
+
+		AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
+		AC_TRY_COMPILE([#include <sys/types.h>],[
+			#ifndef _XOPEN_SOURCE
+			#error	expected _XOPEN_SOURCE to be defined
+			#endif],
+			[cf_cv_gnu_source=no],
+			[cf_save="$CPPFLAGS"
+			 CF_ADD_CFLAGS(-D_GNU_SOURCE)
+			 AC_TRY_COMPILE([#include <sys/types.h>],[
+				#ifdef _XOPEN_SOURCE
+				#error	expected _XOPEN_SOURCE to be undefined
+				#endif],
+				[cf_cv_gnu_source=no],
+				[cf_cv_gnu_source=yes])
+			CPPFLAGS="$cf_save"
+			])
+		])
+
+		if test "$cf_cv_gnu_source" = yes
+		then
+		AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
+			CF_APPEND_TEXT(CPPFLAGS,-D_GNU_SOURCE)
+			AC_TRY_COMPILE([#include <sys/types.h>],[
+				#ifdef _DEFAULT_SOURCE
+				#error	expected _DEFAULT_SOURCE to be undefined
+				#endif],
+				[cf_cv_default_source=no],
+				[cf_cv_default_source=yes])
+			])
+			if test "$cf_cv_default_source" = yes
+			then
+				CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
+			fi
+		fi
+	fi
+
+fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_HEADERS_SH version: 1 updated: 2007/07/04 15:37:05
@@ -2259,7 +2526,7 @@ AC_SUBST(PACKAGE_CONFIG)
 EXTRA_OUTPUT="$EXTRA_OUTPUT headers-sh:$srcdir/headers-sh.in"
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_HEADER_PATH version: 12 updated: 2010/05/05 05:22:40
+dnl CF_HEADER_PATH version: 13 updated: 2015/04/15 19:08:48
 dnl --------------
 dnl Construct a search-list of directories for a nonstandard header-file
 dnl
@@ -2275,8 +2542,8 @@ cf_header_path_list=""
 if test -n "${CFLAGS}${CPPFLAGS}" ; then
 	for cf_header_path in $CPPFLAGS $CFLAGS
 	do
-		case $cf_header_path in #(vi
-		-I*)
+		case $cf_header_path in
+		(-I*)
 			cf_header_path=`echo ".$cf_header_path" |sed -e 's/^...//' -e 's,/include$,,'`
 			CF_ADD_SUBDIR_PATH($1,$2,include,$cf_header_path,NONE)
 			cf_header_path_list="$cf_header_path_list [$]$1"
@@ -2305,7 +2572,7 @@ test -d "$oldincludedir" && {
 $1="[$]$1 $cf_header_path_list"
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_INTEL_COMPILER version: 5 updated: 2013/02/10 10:41:05
+dnl CF_INTEL_COMPILER version: 7 updated: 2015/04/12 15:39:00
 dnl -----------------
 dnl Check if the given compiler is really the Intel compiler for Linux.  It
 dnl tries to imitate gcc, but does not return an error when it finds a mismatch
@@ -2324,7 +2591,7 @@ ifelse([$2],,INTEL_COMPILER,[$2])=no
 
 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
 	case $host_os in
-	linux*|gnu*)
+	(linux*|gnu*)
 		AC_MSG_CHECKING(if this is really Intel ifelse([$1],GXX,C++,C) compiler)
 		cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
 		ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -no-gcc"
@@ -2334,7 +2601,7 @@ if test "$ifelse([$1],,[$1],GCC)" = yes ; then
 make an error
 #endif
 ],[ifelse([$2],,INTEL_COMPILER,[$2])=yes
-cf_save_CFLAGS="$cf_save_CFLAGS -we147 -no-gcc"
+cf_save_CFLAGS="$cf_save_CFLAGS -we147"
 ],[])
 		ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
 		AC_MSG_RESULT($ifelse([$2],,INTEL_COMPILER,[$2]))
@@ -2343,13 +2610,13 @@ cf_save_CFLAGS="$cf_save_CFLAGS -we147 -no-gcc"
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LARGEFILE version: 8 updated: 2012/10/06 08:57:51
+dnl CF_LARGEFILE version: 11 updated: 2018/06/20 20:23:13
 dnl ------------
 dnl Add checks for large file support.
 AC_DEFUN([CF_LARGEFILE],[
 ifdef([AC_FUNC_FSEEKO],[
-    AC_SYS_LARGEFILE
-    if test "$enable_largefile" != no ; then
+	AC_SYS_LARGEFILE
+	if test "$enable_largefile" != no ; then
 	AC_FUNC_FSEEKO
 
 	# Normally we would collect these definitions in the config.h,
@@ -2359,12 +2626,22 @@ ifdef([AC_FUNC_FSEEKO],[
 	# header files by themselves before looking at the body files it is
 	# told to compile.  For ncurses, those header files do not include
 	# the config.h
-	test "$ac_cv_sys_large_files"      != no && CPPFLAGS="$CPPFLAGS -D_LARGE_FILES "
-	test "$ac_cv_sys_largefile_source" != no && CPPFLAGS="$CPPFLAGS -D_LARGEFILE_SOURCE "
-	test "$ac_cv_sys_file_offset_bits" != no && CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits "
+	if test "$ac_cv_sys_large_files" != no
+	then
+		CF_APPEND_TEXT(CPPFLAGS,-D_LARGE_FILES)
+	fi
+	if test "$ac_cv_sys_largefile_source" != no
+	then
+		CF_APPEND_TEXT(CPPFLAGS,-D_LARGEFILE_SOURCE)
+	fi
+	if test "$ac_cv_sys_file_offset_bits" != no
+	then
+		CF_APPEND_TEXT(CPPFLAGS,-D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits)
+	fi
 
 	AC_CACHE_CHECK(whether to use struct dirent64, cf_cv_struct_dirent64,[
 		AC_TRY_COMPILE([
+#pragma GCC diagnostic error "-Wincompatible-pointer-types"
 #include <sys/types.h>
 #include <dirent.h>
 		],[
@@ -2378,11 +2655,11 @@ ifdef([AC_FUNC_FSEEKO],[
 		[cf_cv_struct_dirent64=no])
 	])
 	test "$cf_cv_struct_dirent64" = yes && AC_DEFINE(HAVE_STRUCT_DIRENT64,1,[Define to 1 if we have struct dirent64])
-    fi
+	fi
 ])
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_LD_RPATH_OPT version: 5 updated: 2011/07/17 14:48:41
+dnl CF_LD_RPATH_OPT version: 7 updated: 2016/02/20 18:01:19
 dnl ---------------
 dnl For the given system and compiler, find the compiler flags to pass to the
 dnl loader to use the "rpath" feature.
@@ -2392,39 +2669,39 @@ AC_REQUIRE([CF_CHECK_CACHE])
 
 LD_RPATH_OPT=
 AC_MSG_CHECKING(for an rpath option)
-case $cf_cv_system_name in #(vi
-irix*) #(vi
+case $cf_cv_system_name in
+(irix*)
 	if test "$GCC" = yes; then
 		LD_RPATH_OPT="-Wl,-rpath,"
 	else
 		LD_RPATH_OPT="-rpath "
 	fi
 	;;
-linux*|gnu*|k*bsd*-gnu) #(vi
+(linux*|gnu*|k*bsd*-gnu|freebsd*)
 	LD_RPATH_OPT="-Wl,-rpath,"
 	;;
-openbsd[[2-9]].*|mirbsd*) #(vi
+(openbsd[[2-9]].*|mirbsd*)
 	LD_RPATH_OPT="-Wl,-rpath,"
 	;;
-dragonfly*|freebsd*) #(vi
+(dragonfly*)
 	LD_RPATH_OPT="-rpath "
 	;;
-netbsd*) #(vi
+(netbsd*)
 	LD_RPATH_OPT="-Wl,-rpath,"
 	;;
-osf*|mls+*) #(vi
+(osf*|mls+*)
 	LD_RPATH_OPT="-rpath "
 	;;
-solaris2*) #(vi
+(solaris2*)
 	LD_RPATH_OPT="-R"
 	;;
-*)
+(*)
 	;;
 esac
 AC_MSG_RESULT($LD_RPATH_OPT)
 
-case "x$LD_RPATH_OPT" in #(vi
-x-R*)
+case "x$LD_RPATH_OPT" in
+(x-R*)
 	AC_MSG_CHECKING(if we need a space after rpath option)
 	cf_save_LIBS="$LIBS"
 	CF_ADD_LIBS(${LD_RPATH_OPT}$libdir)
@@ -2436,7 +2713,7 @@ x-R*)
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LIBRARY_PATH version: 9 updated: 2010/03/28 12:52:50
+dnl CF_LIBRARY_PATH version: 10 updated: 2015/04/15 19:08:48
 dnl ---------------
 dnl Construct a search-list of directories for a nonstandard library-file
 dnl
@@ -2450,8 +2727,8 @@ cf_library_path_list=""
 if test -n "${LDFLAGS}${LIBS}" ; then
 	for cf_library_path in $LDFLAGS $LIBS
 	do
-		case $cf_library_path in #(vi
-		-L*)
+		case $cf_library_path in
+		(-L*)
 			cf_library_path=`echo ".$cf_library_path" |sed -e 's/^...//' -e 's,/lib$,,'`
 			CF_ADD_SUBDIR_PATH($1,$2,lib,$cf_library_path,NONE)
 			cf_library_path_list="$cf_library_path_list [$]$1"
@@ -2477,24 +2754,28 @@ fi
 test -z "$cf_cv_libtool_version" && unset cf_cv_libtool_version
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LIB_PREFIX version: 9 updated: 2012/01/21 19:28:10
+dnl CF_LIB_PREFIX version: 12 updated: 2015/10/17 19:03:33
 dnl -------------
 dnl Compute the library-prefix for the given host system
 dnl $1 = variable to set
 define([CF_LIB_PREFIX],
 [
-	case $cf_cv_system_name in #(vi
-	OS/2*|os2*) #(vi
-        LIB_PREFIX=''
-        ;;
-	*)	LIB_PREFIX='lib'
-        ;;
+	case $cf_cv_system_name in
+	(OS/2*|os2*)
+		if test "$DFT_LWR_MODEL" = libtool; then
+			LIB_PREFIX='lib'
+		else
+			LIB_PREFIX=''
+		fi
+		;;
+	(*)	LIB_PREFIX='lib'
+		;;
 	esac
 ifelse($1,,,[$1=$LIB_PREFIX])
 	AC_SUBST(LIB_PREFIX)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LIB_SUFFIX version: 22 updated: 2013/09/07 13:54:05
+dnl CF_LIB_SUFFIX version: 25 updated: 2015/04/17 21:13:04
 dnl -------------
 dnl Compute the library file-suffix from the given model name
 dnl $1 = model name
@@ -2503,61 +2784,64 @@ dnl $3 = dependency variable to set (actual filename)
 dnl The variable $LIB_SUFFIX, if set, prepends the variable to set.
 AC_DEFUN([CF_LIB_SUFFIX],
 [
-	case X$1 in #(vi
-	Xlibtool) #(vi
+	case X$1 in
+	(Xlibtool)
 		$2='.la'
 		$3=[$]$2
 		;;
-	Xdebug) #(vi
+	(Xdebug)
 		$2='_g.a'
 		$3=[$]$2
 		;;
-	Xprofile) #(vi
+	(Xprofile)
 		$2='_p.a'
 		$3=[$]$2
 		;;
-	Xshared) #(vi
+	(Xshared)
 		case $cf_cv_system_name in
-		aix[[5-7]]*) #(vi
-			$2='.a'
+		(aix[[5-7]]*)
+			$2='.so'
 			$3=[$]$2
 			;;
-		cygwin*|msys*|mingw*) #(vi
+		(cygwin*|msys*|mingw*)
 			$2='.dll'
 			$3='.dll.a'
 			;;
-		darwin*) #(vi
+		(darwin*)
 			$2='.dylib'
 			$3=[$]$2
 			;;
-		hpux*) #(vi
+		(hpux*)
 			case $target in
-			ia64*) #(vi
+			(ia64*)
 				$2='.so'
 				$3=[$]$2
 				;;
-			*) #(vi
+			(*)
 				$2='.sl'
 				$3=[$]$2
 				;;
 			esac
 			;;
-		*) #(vi
+		(*)
 			$2='.so'
 			$3=[$]$2
 			;;
 		esac
 		;;
-	*)
+	(*)
 		$2='.a'
 		$3=[$]$2
 		;;
 	esac
-	test -n "$LIB_SUFFIX" && $2="${LIB_SUFFIX}[$]{$2}"
-	test -n "$LIB_SUFFIX" && $3="${LIB_SUFFIX}[$]{$3}"
+	if test -n "${LIB_SUFFIX}${EXTRA_SUFFIX}"
+	then
+		$2="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$2}"
+		$3="${LIB_SUFFIX}${EXTRA_SUFFIX}[$]{$3}"
+	fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MAKEFLAGS version: 14 updated: 2011/03/31 19:29:46
+dnl CF_MAKEFLAGS version: 18 updated: 2018/02/21 21:26:03
 dnl ------------
 dnl Some 'make' programs support ${MAKEFLAGS}, some ${MFLAGS}, to pass 'make'
 dnl options to lower-levels.  It's very useful for "make -n" -- if we have it.
@@ -2570,24 +2854,26 @@ AC_CACHE_CHECK(for makeflags variable, cf_cv_makeflags,[
 	for cf_option in '-${MAKEFLAGS}' '${MFLAGS}'
 	do
 		cat >cf_makeflags.tmp <<CF_EOF
-SHELL = /bin/sh
+SHELL = $SHELL
 all :
 	@ echo '.$cf_option'
 CF_EOF
 		cf_result=`${MAKE:-make} -k -f cf_makeflags.tmp 2>/dev/null | fgrep -v "ing directory" | sed -e 's,[[ 	]]*$,,'`
 		case "$cf_result" in
-		.*k)
+		(.*k|.*kw)
 			cf_result=`${MAKE:-make} -k -f cf_makeflags.tmp CC=cc 2>/dev/null`
 			case "$cf_result" in
-			.*CC=*)	cf_cv_makeflags=
+			(.*CC=*)	cf_cv_makeflags=
 				;;
-			*)	cf_cv_makeflags=$cf_option
+			(*)	cf_cv_makeflags=$cf_option
 				;;
 			esac
 			break
 			;;
-		.-)	;;
-		*)	echo "given option \"$cf_option\", no match \"$cf_result\""
+		(.-)
+			;;
+		(*)
+			CF_MSG_LOG(given option \"$cf_option\", no match \"$cf_result\")
 			;;
 		esac
 	done
@@ -2634,7 +2920,7 @@ AC_SUBST(MAKE_UPPER_TAGS)
 AC_SUBST(MAKE_LOWER_TAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MATH_LIB version: 8 updated: 2010/05/29 16:31:02
+dnl CF_MATH_LIB version: 9 updated: 2017/01/21 11:06:25
 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
@@ -2645,6 +2931,7 @@ AC_CACHE_CHECK(if -lm needed for math functions,
 	cf_cv_need_libm,[
 	AC_TRY_LINK([
 	#include <stdio.h>
+	#include <stdlib.h>
 	#include <math.h>
 	],
 	[double x = rand(); printf("result = %g\n", ]ifelse([$2],,sin(x),$2)[)],
@@ -2694,7 +2981,7 @@ if test "$cf_cv_mbstate_t" != unknown ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MIXEDCASE_FILENAMES version: 5 updated: 2013/09/07 13:54:05
+dnl CF_MIXEDCASE_FILENAMES version: 7 updated: 2015/04/12 15:39:00
 dnl ----------------------
 dnl Check if the file-system supports mixed-case filenames.  If we're able to
 dnl create a lowercase name and see it as uppercase, it doesn't support that.
@@ -2702,11 +2989,11 @@ AC_DEFUN([CF_MIXEDCASE_FILENAMES],
 [
 AC_CACHE_CHECK(if filesystem supports mixed-case filenames,cf_cv_mixedcase,[
 if test "$cross_compiling" = yes ; then
-	case $target_alias in #(vi
-	*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw32*|*-uwin*) #(vi
+	case $target_alias in
+	(*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*)
 		cf_cv_mixedcase=no
 		;;
-	*)
+	(*)
 		cf_cv_mixedcase=yes
 		;;
 	esac
@@ -2765,46 +3052,97 @@ printf("old\n");
 	,[$1=no])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CONFIG version: 10 updated: 2012/10/06 08:57:51
+dnl CF_NCURSES_CONFIG version: 21 updated: 2018/06/20 20:23:13
 dnl -----------------
-dnl Tie together the configure-script macros for ncurses.
-dnl Prefer the "-config" script from ncurses 6.x, to simplify analysis.
-dnl Allow that to be overridden using the $NCURSES_CONFIG environment variable.
+dnl Tie together the configure-script macros for ncurses, preferring these in
+dnl order:
+dnl a) ".pc" files for pkg-config, using $NCURSES_CONFIG_PKG
+dnl b) the "-config" script from ncurses, using $NCURSES_CONFIG
+dnl c) just plain libraries
 dnl
 dnl $1 is the root library name (default: "ncurses")
-AC_DEFUN([CF_NCURSES_CONFIG],
-[
+AC_DEFUN([CF_NCURSES_CONFIG],[
+AC_REQUIRE([CF_PKG_CONFIG])
 cf_ncuconfig_root=ifelse($1,,ncurses,$1)
+cf_have_ncuconfig=no
 
-echo "Looking for ${cf_ncuconfig_root}-config"
+if test "x${PKG_CONFIG:=none}" != xnone; then
+	AC_MSG_CHECKING(pkg-config for $cf_ncuconfig_root)
+	if "$PKG_CONFIG" --exists $cf_ncuconfig_root ; then
+		AC_MSG_RESULT(yes)
 
-CF_ACVERSION_CHECK(2.52,
-	[AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
-	[AC_PATH_PROGS(NCURSES_CONFIG, ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)])
+		AC_MSG_CHECKING(if the $cf_ncuconfig_root package files work)
+		cf_have_ncuconfig=unknown
 
-if test "$NCURSES_CONFIG" != none ; then
+		cf_save_CPPFLAGS="$CPPFLAGS"
+		cf_save_LIBS="$LIBS"
 
-CPPFLAGS="$CPPFLAGS `$NCURSES_CONFIG --cflags`"
-CF_ADD_LIBS(`$NCURSES_CONFIG --libs`)
+		CF_ADD_CFLAGS(`$PKG_CONFIG --cflags $cf_ncuconfig_root`)
+		CF_ADD_LIBS(`$PKG_CONFIG --libs $cf_ncuconfig_root`)
 
-# even with config script, some packages use no-override for curses.h
-CF_CURSES_HEADER(ifelse($1,,ncurses,$1))
+		AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
+			[initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
+			[AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
+				int main(void)
+				{ char *xx = curses_version(); return (xx == 0); }],
+				[cf_have_ncuconfig=yes],
+				[cf_have_ncuconfig=no],
+				[cf_have_ncuconfig=maybe])],
+			[cf_have_ncuconfig=no])
+		AC_MSG_RESULT($cf_have_ncuconfig)
+		test "$cf_have_ncuconfig" = maybe && cf_have_ncuconfig=yes
+		if test "$cf_have_ncuconfig" != "yes"
+		then
+			CPPFLAGS="$cf_save_CPPFLAGS"
+			LIBS="$cf_save_LIBS"
+			NCURSES_CONFIG_PKG=none
+		else
+			AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
+			NCURSES_CONFIG_PKG=$cf_ncuconfig_root
+			CF_TERM_HEADER
+		fi
 
-dnl like CF_NCURSES_CPPFLAGS
-AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
+	else
+		AC_MSG_RESULT(no)
+		NCURSES_CONFIG_PKG=none
+	fi
+else
+	NCURSES_CONFIG_PKG=none
+fi
 
-dnl like CF_NCURSES_LIBS
-CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_ncuconfig_root)
-AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
+if test "x$cf_have_ncuconfig" = "xno"; then
+	cf_ncurses_config="${cf_ncuconfig_root}${NCURSES_CONFIG_SUFFIX}-config"; echo "Looking for ${cf_ncurses_config}"
 
-dnl like CF_NCURSES_VERSION
-cf_cv_ncurses_version=`$NCURSES_CONFIG --version`
+	CF_ACVERSION_CHECK(2.52,
+		[AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
+		[AC_PATH_PROGS(NCURSES_CONFIG,  ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)])
 
-else
+	if test "$NCURSES_CONFIG" != none ; then
+
+		CF_ADD_CFLAGS(`$NCURSES_CONFIG --cflags`)
+		CF_ADD_LIBS(`$NCURSES_CONFIG --libs`)
 
-CF_NCURSES_CPPFLAGS(ifelse($1,,ncurses,$1))
-CF_NCURSES_LIBS(ifelse($1,,ncurses,$1))
+		# even with config script, some packages use no-override for curses.h
+		CF_CURSES_HEADER(ifelse($1,,ncurses,$1))
 
+		dnl like CF_NCURSES_CPPFLAGS
+		AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
+
+		dnl like CF_NCURSES_LIBS
+		CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_ncuconfig_root)
+		AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
+
+		dnl like CF_NCURSES_VERSION
+		cf_cv_ncurses_version=`$NCURSES_CONFIG --version`
+
+	else
+
+		CF_NCURSES_CPPFLAGS(ifelse($1,,ncurses,$1))
+		CF_NCURSES_LIBS(ifelse($1,,ncurses,$1))
+
+	fi
+else
+	NCURSES_CONFIG=none
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
@@ -2859,7 +3197,7 @@ AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
 CF_NCURSES_VERSION
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_HEADER version: 3 updated: 2012/10/06 08:57:51
+dnl CF_NCURSES_HEADER version: 4 updated: 2015/04/15 19:08:48
 dnl -----------------
 dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
 dnl variations of ncurses' installs.
@@ -2908,24 +3246,24 @@ fi
 
 # Set definitions to allow ifdef'ing for ncurses.h
 
-case $cf_cv_ncurses_header in # (vi
-*ncurses.h)
+case $cf_cv_ncurses_header in
+(*ncurses.h)
 	AC_DEFINE(HAVE_NCURSES_H,1,[Define to 1 if we have ncurses.h])
 	;;
 esac
 
-case $cf_cv_ncurses_header in # (vi
-ncurses/curses.h|ncurses/ncurses.h)
+case $cf_cv_ncurses_header in
+(ncurses/curses.h|ncurses/ncurses.h)
 	AC_DEFINE(HAVE_NCURSES_NCURSES_H,1,[Define to 1 if we have ncurses/ncurses.h])
 	;;
-ncursesw/curses.h|ncursesw/ncurses.h)
+(ncursesw/curses.h|ncursesw/ncurses.h)
 	AC_DEFINE(HAVE_NCURSESW_NCURSES_H,1,[Define to 1 if we have ncursesw/ncurses.h])
 	;;
 esac
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_LIBS version: 16 updated: 2010/11/20 17:02:38
+dnl CF_NCURSES_LIBS version: 17 updated: 2015/04/15 19:08:48
 dnl ---------------
 dnl Look for the ncurses library.  This is a little complicated on Linux,
 dnl because it may be linked with the gpm (general purpose mouse) library.
@@ -2951,8 +3289,8 @@ AC_CHECK_LIB(gpm,Gpm_Open,
 		[LIBS="$cf_ncurses_SAVE"],
 		[cf_ncurses_LIBS="-lgpm"])])
 
-case $host_os in #(vi
-freebsd*)
+case $host_os in
+(freebsd*)
 	# This is only necessary if you are linking against an obsolete
 	# version of ncurses (but it should do no harm, since it's static).
 	if test "$cf_nculib_root" = ncurses ; then
@@ -2993,7 +3331,22 @@ CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_nculib_root)
 AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_VERSION version: 14 updated: 2012/10/06 08:57:51
+dnl CF_NCURSES_PTHREADS version: 2 updated: 2016/04/22 05:07:41
+dnl -------------------
+dnl Use this followup check to ensure that we link with pthreads if ncurses
+dnl uses it.
+AC_DEFUN([CF_NCURSES_PTHREADS],[
+: ${cf_nculib_root:=ifelse($1,,ncurses,$1)}
+AC_CHECK_LIB($cf_nculib_root,_nc_init_pthreads,
+	cf_cv_ncurses_pthreads=yes,
+	cf_cv_ncurses_pthreads=no)
+if test "$cf_cv_ncurses_pthreads" = yes
+then
+	CF_ADD_LIBS(-lpthread)
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_NCURSES_VERSION version: 15 updated: 2017/05/09 19:26:10
 dnl ------------------
 dnl Check for the version of ncurses, to aid in reporting bugs, etc.
 dnl Call CF_CURSES_CPPFLAGS first, or CF_NCURSES_CPPFLAGS.  We don't use
@@ -3008,7 +3361,7 @@ AC_CACHE_CHECK(for ncurses version, cf_cv_ncurses_version,[
 	AC_TRY_RUN([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <stdio.h>
-int main()
+int main(void)
 {
 	FILE *fp = fopen("$cf_tempfile", "w");
 #ifdef NCURSES_VERSION
@@ -3055,7 +3408,27 @@ EOF
 test "$cf_cv_ncurses_version" = no || AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NO_LEAKS_OPTION version: 5 updated: 2012/10/02 20:55:03
+dnl CF_NL_LANGINFO_1STDAY version: 1 updated: 2016/02/08 19:06:25
+dnl ---------------------
+dnl glibc locale support has runtime extensions which might be implemented in
+dnl other systems.
+AC_DEFUN([CF_NL_LANGINFO_1STDAY],[
+AC_CACHE_CHECK(if runtime has nl_langinfo support for first weekday,
+	cf_nl_langinfo_1stday,[
+	AC_TRY_COMPILE([
+#include <langinfo.h>
+#include <locale.h>
+],[
+	int first_weekday = nl_langinfo (_NL_TIME_FIRST_WEEKDAY)[0];
+	long week_1stday_l = (long) nl_langinfo (_NL_TIME_WEEK_1STDAY);
+],[cf_nl_langinfo_1stday=yes
+],[cf_nl_langinfo_1stday=no
+])
+])
+test "x$cf_nl_langinfo_1stday" = xyes && AC_DEFINE(HAVE_NL_LANGINFO_1STDAY)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_NO_LEAKS_OPTION version: 6 updated: 2015/04/12 15:39:00
 dnl ------------------
 dnl see CF_WITH_NO_LEAKS
 AC_DEFUN([CF_NO_LEAKS_OPTION],[
@@ -3071,12 +3444,12 @@ AC_ARG_WITH($1,
 	[with_$1=])
 AC_MSG_RESULT(${with_$1:-no})
 
-case .$with_cflags in #(vi
-.*-g*)
-	case .$CFLAGS in #(vi
-	.*-g*) #(vi
+case .$with_cflags in
+(.*-g*)
+	case .$CFLAGS in
+	(.*-g*)
 		;;
-	*)
+	(*)
 		CF_ADD_CFLAGS([-g])
 		;;
 	esac
@@ -3084,17 +3457,17 @@ case .$with_cflags in #(vi
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NUMBER_SYNTAX version: 1 updated: 2003/09/20 18:12:49
+dnl CF_NUMBER_SYNTAX version: 2 updated: 2015/04/17 21:13:04
 dnl ----------------
 dnl Check if the given variable is a number.  If not, report an error.
 dnl $1 is the variable
 dnl $2 is the message
 AC_DEFUN([CF_NUMBER_SYNTAX],[
 if test -n "$1" ; then
-  case $1 in #(vi
-  [[0-9]]*) #(vi
+  case $1 in
+  ([[0-9]]*)
  	;;
-  *)
+  (*)
 	AC_MSG_ERROR($2 is not a number: $1)
  	;;
   esac
@@ -3140,7 +3513,7 @@ AC_SUBST(MSG_DIR_MAKE)
 AC_SUBST(SUB_MAKEFILE)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PATHSEP version: 6 updated: 2012/09/29 18:38:12
+dnl CF_PATHSEP version: 7 updated: 2015/04/12 15:39:00
 dnl ----------
 dnl Provide a value for the $PATH and similar separator (or amend the value
 dnl as provided in autoconf 2.5x).
@@ -3148,15 +3521,15 @@ AC_DEFUN([CF_PATHSEP],
 [
 	AC_MSG_CHECKING(for PATH separator)
 	case $cf_cv_system_name in
-	os2*)	PATH_SEPARATOR=';'  ;;
-	*)	${PATH_SEPARATOR:=':'}  ;;
+	(os2*)	PATH_SEPARATOR=';'  ;;
+	(*)	${PATH_SEPARATOR:=':'}  ;;
 	esac
 ifelse([$1],,,[$1=$PATH_SEPARATOR])
 	AC_SUBST(PATH_SEPARATOR)
 	AC_MSG_RESULT($PATH_SEPARATOR)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PATH_SYNTAX version: 14 updated: 2012/06/19 20:58:54
+dnl CF_PATH_SYNTAX version: 16 updated: 2015/04/18 08:56:57
 dnl --------------
 dnl Check the argument to see that it looks like a pathname.  Rewrite it if it
 dnl begins with one of the prefix/exec_prefix variables, and then again if the
@@ -3164,36 +3537,81 @@ dnl result begins with 'NONE'.  This is necessary to work around autoconf's
 dnl delayed evaluation of those symbols.
 AC_DEFUN([CF_PATH_SYNTAX],[
 if test "x$prefix" != xNONE; then
-  cf_path_syntax="$prefix"
+	cf_path_syntax="$prefix"
 else
-  cf_path_syntax="$ac_default_prefix"
+	cf_path_syntax="$ac_default_prefix"
 fi
 
-case ".[$]$1" in #(vi
-.\[$]\(*\)*|.\'*\'*) #(vi
-  ;;
-..|./*|.\\*) #(vi
-  ;;
-.[[a-zA-Z]]:[[\\/]]*) #(vi OS/2 EMX
-  ;;
-.\[$]{*prefix}*|.\[$]{*dir}*) #(vi
-  eval $1="[$]$1"
-  case ".[$]$1" in #(vi
-  .NONE/*)
-    $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
-    ;;
-  esac
-  ;; #(vi
-.no|.NONE/*)
-  $1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
-  ;;
-*)
-  ifelse([$2],,[AC_MSG_ERROR([expected a pathname, not \"[$]$1\"])],$2)
-  ;;
+case ".[$]$1" in
+(.\[$]\(*\)*|.\'*\'*)
+	;;
+(..|./*|.\\*)
+	;;
+(.[[a-zA-Z]]:[[\\/]]*) # OS/2 EMX
+	;;
+(.\[$]{*prefix}*|.\[$]{*dir}*)
+	eval $1="[$]$1"
+	case ".[$]$1" in
+	(.NONE/*)
+		$1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
+		;;
+	esac
+	;;
+(.no|.NONE/*)
+	$1=`echo [$]$1 | sed -e s%NONE%$cf_path_syntax%`
+	;;
+(*)
+	ifelse([$2],,[AC_MSG_ERROR([expected a pathname, not \"[$]$1\"])],$2)
+	;;
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PKG_CONFIG version: 7 updated: 2011/04/29 04:53:22
+dnl CF_PDCURSES_X11 version: 14 updated: 2018/06/20 20:23:13
+dnl ---------------
+dnl Configure for PDCurses' X11 library
+AC_DEFUN([CF_PDCURSES_X11],[
+AC_REQUIRE([CF_X_ATHENA])
+
+CF_ACVERSION_CHECK(2.52,
+	[AC_CHECK_TOOLS(XCURSES_CONFIG, xcurses-config, none)],
+	[AC_PATH_PROGS(XCURSES_CONFIG, xcurses-config, none)])
+
+if test "$XCURSES_CONFIG" != none ; then
+
+CF_ADD_CFLAGS(`$XCURSES_CONFIG --cflags`)
+CF_ADD_LIBS(`$XCURSES_CONFIG --libs`)
+
+cf_cv_lib_XCurses=yes
+
+else
+
+LDFLAGS="$LDFLAGS $X_LIBS"
+CF_CHECK_CFLAGS($X_CFLAGS)
+AC_CHECK_LIB(X11,XOpenDisplay,
+	[CF_ADD_LIBS(-lX11)],,
+	[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])
+AC_CACHE_CHECK(for XCurses library,cf_cv_lib_XCurses,[
+CF_ADD_LIBS(-lXCurses)
+AC_TRY_LINK([
+#include <xcurses.h>
+char *XCursesProgramName = "test";
+],[XCursesExit();],
+[cf_cv_lib_XCurses=yes],
+[cf_cv_lib_XCurses=no])
+])
+
+fi
+
+if test $cf_cv_lib_XCurses = yes ; then
+	AC_DEFINE(UNIX,1,[Define to 1 if using PDCurses on Unix])
+	AC_DEFINE(XCURSES,1,[Define to 1 if using PDCurses on Unix])
+	AC_CHECK_HEADER(xcurses.h, AC_DEFINE(HAVE_XCURSES,1,[Define to 1 if using PDCurses on Unix]))
+else
+	AC_MSG_ERROR(Cannot link with XCurses)
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_PKG_CONFIG version: 10 updated: 2015/04/26 18:06:58
 dnl -------------
 dnl Check for the package-config program, unless disabled by command-line.
 AC_DEFUN([CF_PKG_CONFIG],
@@ -3205,16 +3623,16 @@ AC_ARG_WITH(pkg-config,
 	[cf_pkg_config=yes])
 AC_MSG_RESULT($cf_pkg_config)
 
-case $cf_pkg_config in #(vi
-no) #(vi
+case $cf_pkg_config in
+(no)
 	PKG_CONFIG=none
 	;;
-yes) #(vi
+(yes)
 	CF_ACVERSION_CHECK(2.52,
 		[AC_PATH_TOOL(PKG_CONFIG, pkg-config, none)],
 		[AC_PATH_PROG(PKG_CONFIG, pkg-config, none)])
 	;;
-*)
+(*)
 	PKG_CONFIG=$withval
 	;;
 esac
@@ -3222,12 +3640,14 @@ esac
 test -z "$PKG_CONFIG" && PKG_CONFIG=none
 if test "$PKG_CONFIG" != none ; then
 	CF_PATH_SYNTAX(PKG_CONFIG)
+elif test "x$cf_pkg_config" != xno ; then
+	AC_MSG_WARN(pkg-config is not installed)
 fi
 
 AC_SUBST(PKG_CONFIG)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_POSIX_C_SOURCE version: 8 updated: 2010/05/26 05:38:42
+dnl CF_POSIX_C_SOURCE version: 10 updated: 2018/06/20 20:23:13
 dnl -----------------
 dnl Define _POSIX_C_SOURCE to the given level, and _POSIX_SOURCE if needed.
 dnl
@@ -3259,15 +3679,15 @@ make an error
 #endif],
 	[cf_cv_posix_c_source=no],
 	[cf_want_posix_source=no
-	 case .$cf_POSIX_C_SOURCE in #(vi
-	 .[[12]]??*) #(vi
+	 case .$cf_POSIX_C_SOURCE in
+	 (.[[12]]??*)
 		cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
 		;;
-	 .2) #(vi
+	 (.2)
 		cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
 		cf_want_posix_source=yes
 		;;
-	 .*)
+	 (.*)
 		cf_want_posix_source=yes
 		;;
 	 esac
@@ -3280,7 +3700,8 @@ make an error
 	 fi
 	 CF_MSG_LOG(ifdef from value $cf_POSIX_C_SOURCE)
 	 CFLAGS="$cf_trim_CFLAGS"
-	 CPPFLAGS="$cf_trim_CPPFLAGS $cf_cv_posix_c_source"
+	 CPPFLAGS="$cf_trim_CPPFLAGS"
+	 CF_APPEND_TEXT(CPPFLAGS,$cf_cv_posix_c_source)
 	 CF_MSG_LOG(if the second compile does not leave our definition intact error)
 	 AC_TRY_COMPILE([#include <sys/types.h>],[
 #ifndef _POSIX_C_SOURCE
@@ -3300,7 +3721,14 @@ fi
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PROG_CC version: 3 updated: 2012/10/06 15:31:55
+dnl CF_PROG_AR version: 1 updated: 2009/01/01 20:15:22
+dnl ----------
+dnl Check for archiver "ar".
+AC_DEFUN([CF_PROG_AR],[
+AC_CHECK_TOOL(AR, ar, ar)
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_PROG_CC version: 4 updated: 2014/07/12 18:57:58
 dnl ----------
 dnl standard check for CC, plus followup sanity checks
 dnl $1 = optional parameter to pass to AC_PROG_CC to specify compiler name
@@ -3310,24 +3738,24 @@ CF_GCC_VERSION
 CF_ACVERSION_CHECK(2.52,
 	[AC_PROG_CC_STDC],
 	[CF_ANSI_CC_REQD])
-CF_CC_ENV_FLAGS 
+CF_CC_ENV_FLAGS
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PROG_EXT version: 11 updated: 2012/10/06 08:57:51
+dnl CF_PROG_EXT version: 14 updated: 2018/06/20 20:23:13
 dnl -----------
 dnl Compute $PROG_EXT, used for non-Unix ports, such as OS/2 EMX.
 AC_DEFUN([CF_PROG_EXT],
 [
 AC_REQUIRE([CF_CHECK_CACHE])
 case $cf_cv_system_name in
-os2*)
-    CFLAGS="$CFLAGS -Zmt"
-    CPPFLAGS="$CPPFLAGS -D__ST_MT_ERRNO__"
-    CXXFLAGS="$CXXFLAGS -Zmt"
-    # autoconf's macro sets -Zexe and suffix both, which conflict:w
-    LDFLAGS="$LDFLAGS -Zmt -Zcrtdll"
-    ac_cv_exeext=.exe
-    ;;
+(os2*)
+	CFLAGS="$CFLAGS -Zmt"
+	CF_APPEND_TEXT(CPPFLAGS,-D__ST_MT_ERRNO__)
+	CXXFLAGS="$CXXFLAGS -Zmt"
+	# autoconf's macro sets -Zexe and suffix both, which conflict:w
+	LDFLAGS="$LDFLAGS -Zmt -Zcrtdll"
+	ac_cv_exeext=.exe
+	;;
 esac
 
 AC_EXEEXT
@@ -3338,11 +3766,31 @@ AC_SUBST(PROG_EXT)
 test -n "$PROG_EXT" && AC_DEFINE_UNQUOTED(PROG_EXT,"$PROG_EXT",[Define to the program extension (normally blank)])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PROG_LINT version: 2 updated: 2009/08/12 04:43:14
+dnl CF_PROG_GROFF version: 3 updated: 2018/01/07 13:16:19
+dnl -------------
+dnl Check if groff is available, for cases (such as html output) where nroff
+dnl is not enough.
+AC_DEFUN([CF_PROG_GROFF],[
+AC_PATH_PROG(GROFF_PATH,groff,no)
+AC_PATH_PROGS(NROFF_PATH,nroff mandoc,no)
+AC_PATH_PROG(TBL_PATH,tbl,cat)
+if test "x$GROFF_PATH" = xno
+then
+	NROFF_NOTE=
+	GROFF_NOTE="#"
+else
+	NROFF_NOTE="#"
+	GROFF_NOTE=
+fi
+AC_SUBST(GROFF_NOTE)
+AC_SUBST(NROFF_NOTE)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_PROG_LINT version: 3 updated: 2016/05/22 15:25:54
 dnl ------------
 AC_DEFUN([CF_PROG_LINT],
 [
-AC_CHECK_PROGS(LINT, tdlint lint alint splint lclint)
+AC_CHECK_PROGS(LINT, lint cppcheck splint)
 AC_SUBST(LINT_OPTS)
 ])dnl
 dnl ---------------------------------------------------------------------------
@@ -3442,7 +3890,7 @@ fi
 AC_SUBST(EXTRA_LDFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_RPATH_HACK_2 version: 6 updated: 2010/04/17 16:31:24
+dnl CF_RPATH_HACK_2 version: 7 updated: 2015/04/12 15:39:00
 dnl ---------------
 dnl Do one set of substitutions for CF_RPATH_HACK, adding an rpath option to
 dnl EXTRA_LDFLAGS for each -L option found.
@@ -3458,8 +3906,8 @@ CF_VERBOSE(...checking $1 [$]$1)
 cf_rpath_dst=
 for cf_rpath_src in [$]$1
 do
-	case $cf_rpath_src in #(vi
-	-L*) #(vi
+	case $cf_rpath_src in
+	(-L*)
 
 		# check if this refers to a directory which we will ignore
 		cf_rpath_skip=no
@@ -3502,7 +3950,7 @@ CF_VERBOSE(...checked $1 [$]$1)
 AC_SUBST(EXTRA_LDFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SHARED_OPTS version: 83 updated: 2013/09/21 17:34:53
+dnl CF_SHARED_OPTS version: 92 updated: 2017/12/30 17:26:05
 dnl --------------
 dnl --------------
 dnl Attempt to determine the appropriate CC/LD options for creating a shared
@@ -3537,6 +3985,12 @@ AC_DEFUN([CF_SHARED_OPTS],
 	INSTALL_LIB="-m 644"
 	: ${rel_builddir:=.}
 
+	shlibdir=$libdir
+	AC_SUBST(shlibdir)
+
+	MAKE_DLLS="#"
+	AC_SUBST(MAKE_DLLS)
+
 	cf_cv_do_symlinks=no
 	cf_ld_rpath_opt=
 	test "$cf_cv_enable_rpath" = yes && cf_ld_rpath_opt="$LD_RPATH_OPT"
@@ -3545,15 +3999,16 @@ AC_DEFUN([CF_SHARED_OPTS],
 	AC_ARG_WITH(shlib-version,
 	[  --with-shlib-version=X  Specify rel or abi version for shared libs],
 	[test -z "$withval" && withval=auto
-	case $withval in #(vi
-	yes) #(vi
+	case $withval in
+	(yes)
 		cf_cv_shlib_version=auto
 		;;
-	rel|abi|auto|no) #(vi
+	(rel|abi|auto)
 		cf_cv_shlib_version=$withval
 		;;
-	*)
-		AC_MSG_ERROR([option value must be one of: rel, abi, auto or no])
+	(*)
+		AC_MSG_RESULT($withval)
+		AC_MSG_ERROR([option value must be one of: rel, abi, or auto])
 		;;
 	esac
 	],[cf_cv_shlib_version=auto])
@@ -3564,8 +4019,21 @@ AC_DEFUN([CF_SHARED_OPTS],
 
 	# Some less-capable ports of gcc support only -fpic
 	CC_SHARED_OPTS=
+
+	cf_try_fPIC=no
 	if test "$GCC" = yes
 	then
+		cf_try_fPIC=yes
+	else
+		case $cf_cv_system_name in
+		(*linux*)	# e.g., PGI compiler
+			cf_try_fPIC=yes
+			;;
+		esac
+	fi
+
+	if test "$cf_try_fPIC" = yes
+	then
 		AC_MSG_CHECKING(which $CC option to use)
 		cf_save_CFLAGS="$CFLAGS"
 		for CC_SHARED_OPTS in -fPIC -fpic ''
@@ -3579,28 +4047,30 @@ AC_DEFUN([CF_SHARED_OPTS],
 
 	cf_cv_shlib_version_infix=no
 
-	case $cf_cv_system_name in #(vi
-	aix4.[3-9]*|aix[[5-7]]*) #(vi
+	case $cf_cv_system_name in
+	(aix4.[3-9]*|aix[[5-7]]*)
 		if test "$GCC" = yes; then
-			CC_SHARED_OPTS=
-			MK_SHARED_LIB='${CC} -shared -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
+			CC_SHARED_OPTS='-Wl,-brtl'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
 		else
-			# CC_SHARED_OPTS='-qpic=large -G'
-			# perhaps "-bM:SRE -bnoentry -bexpall"
-			MK_SHARED_LIB='${CC} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
+			CC_SHARED_OPTS='-brtl'
+			# as well as '-qpic=large -G' or perhaps "-bM:SRE -bnoentry -bexpall"
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
 		fi
 		;;
-	beos*) #(vi
-		MK_SHARED_LIB='${CC} ${CFLAGS} -o $[@] -Xlinker -soname=`basename $[@]` -nostart -e 0'
+	(beos*)
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -o $[@] -Xlinker -soname=`basename $[@]` -nostart -e 0'
 		;;
-	cygwin*) #(vi
+	(cygwin*)
 		CC_SHARED_OPTS=
-		MK_SHARED_LIB='sh '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
+		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
 		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
 		cf_cv_shlib_version=cygdll
 		cf_cv_shlib_version_infix=cygdll
+		shlibdir=$bindir
+		MAKE_DLLS=
 		cat >mk_shared_lib.sh <<-CF_EOF
-		#!/bin/sh
+		#!$SHELL
 		SHARED_LIB=\[$]1
 		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/cyg/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
 		shift
@@ -3609,18 +4079,20 @@ AC_DEFUN([CF_SHARED_OPTS],
 		** SHARED_LIB \[$]SHARED_LIB
 		** IMPORT_LIB \[$]IMPORT_LIB
 EOF
-		exec \[$]* -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
+		exec \[$]* ${LDFLAGS} -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
 CF_EOF
 		chmod +x mk_shared_lib.sh
 		;;
-	msys*) #(vi
+	(msys*)
 		CC_SHARED_OPTS=
-		MK_SHARED_LIB='sh '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
+		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
 		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
 		cf_cv_shlib_version=msysdll
 		cf_cv_shlib_version_infix=msysdll
+		shlibdir=$bindir
+		MAKE_DLLS=
 		cat >mk_shared_lib.sh <<-CF_EOF
-		#!/bin/sh
+		#!$SHELL
 		SHARED_LIB=\[$]1
 		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/msys-/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
 		shift
@@ -3629,14 +4101,14 @@ CF_EOF
 		** SHARED_LIB \[$]SHARED_LIB
 		** IMPORT_LIB \[$]IMPORT_LIB
 EOF
-		exec \[$]* -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
+		exec \[$]* ${LDFLAGS} -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
 CF_EOF
 		chmod +x mk_shared_lib.sh
 		;;
-	darwin*) #(vi
+	(darwin*)
 		cf_try_cflags="no-cpp-precomp"
 		CC_SHARED_OPTS="-dynamic"
-		MK_SHARED_LIB='${CC} ${CFLAGS} -dynamiclib -install_name ${libdir}/`basename $[@]` -compatibility_version ${ABI_VERSION} -current_version ${ABI_VERSION} -o $[@]'
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -dynamiclib -install_name ${libdir}/`basename $[@]` -compatibility_version ${ABI_VERSION} -current_version ${ABI_VERSION} -o $[@]'
 		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=abi
 		cf_cv_shlib_version_infix=yes
 		AC_CACHE_CHECK([if ld -search_paths_first works], cf_cv_ldflags_search_paths_first, [
@@ -3648,15 +4120,15 @@ CF_EOF
 			LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
 		fi
 		;;
-	hpux[[7-8]]*) #(vi
-		# HP-UX 8.07 ld lacks "+b" option used for libdir search-list 
+	(hpux[[7-8]]*)
+		# HP-UX 8.07 ld lacks "+b" option used for libdir search-list
 		if test "$GCC" != yes; then
 			CC_SHARED_OPTS='+Z'
 		fi
-		MK_SHARED_LIB='${LD} -b -o $[@]'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -b -o $[@]'
 		INSTALL_LIB="-m 555"
 		;;
-	hpux*) #(vi
+	(hpux*)
 		# (tested with gcc 2.7.2 -- I don't have c89)
 		if test "$GCC" = yes; then
 			LD_SHARED_OPTS='-Xlinker +b -Xlinker ${libdir}'
@@ -3664,35 +4136,35 @@ CF_EOF
 			CC_SHARED_OPTS='+Z'
 			LD_SHARED_OPTS='-Wl,+b,${libdir}'
 		fi
-		MK_SHARED_LIB='${LD} +b ${libdir} -b -o $[@]'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} +b ${libdir} -b -o $[@]'
 		# HP-UX shared libraries must be executable, and should be
 		# readonly to exploit a quirk in the memory manager.
 		INSTALL_LIB="-m 555"
 		;;
-	interix*)
+	(interix*)
 		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
 		if test "$cf_cv_shlib_version" = rel; then
-			cf_shared_soname='`basename $@ .${REL_VERSION}`.${ABI_VERSION}'
+			cf_shared_soname='`basename $[@] .${REL_VERSION}`.${ABI_VERSION}'
 		else
-			cf_shared_soname='`basename $@`'
+			cf_shared_soname='`basename $[@]`'
 		fi
 		CC_SHARED_OPTS=
-		MK_SHARED_LIB='${CC} -shared -Wl,-rpath,${RPATH_LIST} -Wl,-h,'$cf_shared_soname' -o $@'
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-rpath,${RPATH_LIST} -Wl,-h,'$cf_shared_soname' -o $[@]'
 		;;
-	irix*) #(vi
+	(irix*)
 		if test "$cf_cv_enable_rpath" = yes ; then
 			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
 		fi
 		# tested with IRIX 5.2 and 'cc'.
 		if test "$GCC" != yes; then
 			CC_SHARED_OPTS='-KPIC'
-			MK_SHARED_LIB='${CC} -shared -rdata_shared -soname `basename $[@]` -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -rdata_shared -soname `basename $[@]` -o $[@]'
 		else
-			MK_SHARED_LIB='${CC} -shared -Wl,-soname,`basename $[@]` -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,`basename $[@]` -o $[@]'
 		fi
 		cf_cv_rm_so_locs=yes
 		;;
-	linux*|gnu*|k*bsd*-gnu) #(vi
+	(linux*|gnu*|k*bsd*-gnu)
 		if test "$DFT_LWR_MODEL" = "shared" ; then
 			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
@@ -3701,21 +4173,23 @@ CF_EOF
 			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
 		fi
 		CF_SHARED_SONAME
-		MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
 		;;
-	mingw*) #(vi
+	(mingw*)
 		cf_cv_shlib_version=mingw
 		cf_cv_shlib_version_infix=mingw
+		shlibdir=$bindir
+		MAKE_DLLS=
 		if test "$DFT_LWR_MODEL" = "shared" ; then
 			LOCAL_LDFLAGS="-Wl,--enable-auto-import"
 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
 			EXTRA_LDFLAGS="-Wl,--enable-auto-import $EXTRA_LDFLAGS"
 		fi
 		CC_SHARED_OPTS=
-		MK_SHARED_LIB='sh '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
+		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
 		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
 		cat >mk_shared_lib.sh <<-CF_EOF
-		#!/bin/sh
+		#!$SHELL
 		SHARED_LIB=\[$]1
 		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
 		shift
@@ -3724,11 +4198,11 @@ CF_EOF
 		** SHARED_LIB \[$]SHARED_LIB
 		** IMPORT_LIB \[$]IMPORT_LIB
 EOF
-		exec \[$]* -shared -Wl,--enable-auto-import,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
+		exec \[$]* ${LDFLAGS} -shared -Wl,--enable-auto-import,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
 CF_EOF
 		chmod +x mk_shared_lib.sh
 		;;
-	openbsd[[2-9]].*|mirbsd*) #(vi
+	(openbsd[[2-9]].*|mirbsd*)
 		if test "$DFT_LWR_MODEL" = "shared" ; then
 			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
@@ -3738,14 +4212,14 @@ CF_EOF
 		fi
 		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
 		CF_SHARED_SONAME
-		MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-Bshareable,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-Bshareable,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
 		;;
-	nto-qnx*|openbsd*|freebsd[[12]].*) #(vi
+	(nto-qnx*|openbsd*|freebsd[[12]].*)
 		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
-		MK_SHARED_LIB='${LD} -Bshareable -o $[@]'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -Bshareable -o $[@]'
 		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
 		;;
-	dragonfly*|freebsd*) #(vi
+	(dragonfly*|freebsd*)
 		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
 		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
 			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
@@ -3753,9 +4227,9 @@ CF_EOF
 			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
 		fi
 		CF_SHARED_SONAME
-		MK_SHARED_LIB='${LD} -shared -Bshareable -soname=`basename $[@]` -o $[@]'
+		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
 		;;
-	netbsd*) #(vi
+	(netbsd*)
 		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
 		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
 			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
@@ -3769,18 +4243,18 @@ CF_EOF
 			fi
 			fi
 			CF_SHARED_SONAME
-			MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname' -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname' -o $[@]'
 		else
-			MK_SHARED_LIB='${CC} -Wl,-shared -Wl,-Bshareable -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -Wl,-shared -Wl,-Bshareable -o $[@]'
 		fi
 		;;
-	osf*|mls+*) #(vi
+	(osf*|mls+*)
 		# tested with OSF/1 V3.2 and 'cc'
 		# tested with OSF/1 V3.2 and gcc 2.6.3 (but the c++ demo didn't
 		# link with shared libs).
-		MK_SHARED_LIB='${LD} -set_version ${REL_VERSION}:${ABI_VERSION} -expect_unresolved "*" -shared -soname `basename $[@]`'
-		case $host_os in #(vi
-		osf4*)
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -set_version ${REL_VERSION}:${ABI_VERSION} -expect_unresolved "*" -shared -soname `basename $[@]`'
+		case $host_os in
+		(osf4*)
 			MK_SHARED_LIB="${MK_SHARED_LIB} -msym"
 			;;
 		esac
@@ -3791,12 +4265,12 @@ CF_EOF
 		fi
 		cf_cv_rm_so_locs=yes
 		;;
-	sco3.2v5*)  # (also uw2* and UW7: hops 13-Apr-98
+	(sco3.2v5*)  # also uw2* and UW7: hops 13-Apr-98
 		# tested with osr5.0.5
 		if test "$GCC" != yes; then
 			CC_SHARED_OPTS='-belf -KPIC'
 		fi
-		MK_SHARED_LIB='${LD} -dy -G -h `basename $[@] .${REL_VERSION}`.${ABI_VERSION} -o [$]@'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -dy -G -h `basename $[@] .${REL_VERSION}`.${ABI_VERSION} -o [$]@'
 		if test "$cf_cv_enable_rpath" = yes ; then
 			# only way is to set LD_RUN_PATH but no switch for it
 			RUN_PATH=$libdir
@@ -3805,15 +4279,15 @@ CF_EOF
 		LINK_PROGS='LD_RUN_PATH=${libdir}'
 		LINK_TESTS='Pwd=`pwd`;LD_RUN_PATH=`dirname $${Pwd}`/lib'
 		;;
-	sunos4*) #(vi
+	(sunos4*)
 		# tested with SunOS 4.1.1 and gcc 2.7.0
 		if test "$GCC" != yes; then
 			CC_SHARED_OPTS='-KPIC'
 		fi
-		MK_SHARED_LIB='${LD} -assert pure-text -o $[@]'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -assert pure-text -o $[@]'
 		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
 		;;
-	solaris2*) #(vi
+	(solaris2*)
 		# tested with SunOS 5.5.1 (solaris 2.5.1) and gcc 2.7.2
 		# tested with SunOS 5.10 (solaris 10) and gcc 3.4.3
 		if test "$DFT_LWR_MODEL" = "shared" ; then
@@ -3833,32 +4307,32 @@ CF_EOF
 			done
 			CFLAGS="$cf_save_CFLAGS"
 			CC_SHARED_OPTS=$cf_shared_opts
-			MK_SHARED_LIB='${CC} -dy -G -h '$cf_cv_shared_soname' -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -dy -G -h '$cf_cv_shared_soname' -o $[@]'
 		else
-			MK_SHARED_LIB='${CC} -shared -dy -G -h '$cf_cv_shared_soname' -o $[@]'
+			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -dy -G -h '$cf_cv_shared_soname' -o $[@]'
 		fi
 		;;
-	sysv5uw7*|unix_sv*) #(vi
+	(sysv5uw7*|unix_sv*)
 		# tested with UnixWare 7.1.0 (gcc 2.95.2 and cc)
 		if test "$GCC" != yes; then
 			CC_SHARED_OPTS='-KPIC'
 		fi
-		MK_SHARED_LIB='${LD} -d y -G -o [$]@'
+		MK_SHARED_LIB='${LD} ${LDFLAGS} -d y -G -o [$]@'
 		;;
-	*)
+	(*)
 		CC_SHARED_OPTS='unknown'
 		MK_SHARED_LIB='echo unknown'
 		;;
 	esac
 
 	# This works if the last tokens in $MK_SHARED_LIB are the -o target.
-	case "$cf_cv_shlib_version" in #(vi
-	rel|abi)
-		case "$MK_SHARED_LIB" in #(vi
-		*'-o $[@]') #(vi
+	case "$cf_cv_shlib_version" in
+	(rel|abi)
+		case "$MK_SHARED_LIB" in
+		(*'-o $[@]')
 			test "$cf_cv_do_symlinks" = no && cf_cv_do_symlinks=yes
 			;;
-		*)
+		(*)
 			AC_MSG_WARN(ignored --with-shlib-version)
 			;;
 		esac
@@ -3936,7 +4410,120 @@ define([CF_SHARED_SONAME],
 	fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_SUBDIR_PATH version: 6 updated: 2010/04/21 06:20:50
+dnl CF_SIZECHANGE version: 14 updated: 2018/06/20 20:23:13
+dnl -------------
+dnl Check for definitions & structures needed for window size-changing
+dnl
+dnl https://stackoverflow.com/questions/18878141/difference-between-structures-ttysize-and-winsize/50769952#50769952
+AC_DEFUN([CF_SIZECHANGE],
+[
+AC_REQUIRE([CF_STRUCT_TERMIOS])
+AC_CACHE_CHECK(declaration of size-change, cf_cv_sizechange,[
+	cf_cv_sizechange=unknown
+	cf_save_CPPFLAGS="$CPPFLAGS"
+
+for cf_opts in "" "NEED_PTEM_H"
+do
+
+	CPPFLAGS="$cf_save_CPPFLAGS"
+	if test -n "$cf_opts"
+	then
+		CF_APPEND_TEXT(CPPFLAGS,-D$cf_opts)
+	fi
+	AC_TRY_COMPILE([#include <sys/types.h>
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#else
+#ifdef HAVE_TERMIO_H
+#include <termio.h>
+#endif
+#endif
+
+#ifdef NEED_PTEM_H
+/* This is a workaround for SCO:  they neglected to define struct winsize in
+ * termios.h -- it's only in termio.h and ptem.h
+ */
+#include <sys/stream.h>
+#include <sys/ptem.h>
+#endif
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+],[
+#ifdef TIOCGSIZE
+	struct ttysize win;	/* SunOS 3.0... */
+	int y = win.ts_lines;
+	int x = win.ts_cols;
+#else
+#ifdef TIOCGWINSZ
+	struct winsize win;	/* everything else */
+	int y = win.ws_row;
+	int x = win.ws_col;
+#else
+	no TIOCGSIZE or TIOCGWINSZ
+#endif /* TIOCGWINSZ */
+#endif /* TIOCGSIZE */
+	],
+	[cf_cv_sizechange=yes],
+	[cf_cv_sizechange=no])
+
+	CPPFLAGS="$cf_save_CPPFLAGS"
+	if test "$cf_cv_sizechange" = yes ; then
+		echo "size-change succeeded ($cf_opts)" >&AC_FD_CC
+		test -n "$cf_opts" && cf_cv_sizechange="$cf_opts"
+		break
+	fi
+done
+])
+if test "$cf_cv_sizechange" != no ; then
+	AC_DEFINE(HAVE_SIZECHANGE,1,[Define to 1 if sizechange declarations are provided])
+	case $cf_cv_sizechange in
+	(NEED*)
+		AC_DEFINE_UNQUOTED($cf_cv_sizechange )
+		;;
+	esac
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_STRUCT_TERMIOS version: 9 updated: 2018/06/08 21:57:23
+dnl -----------------
+dnl Some machines require _POSIX_SOURCE to completely define struct termios.
+AC_DEFUN([CF_STRUCT_TERMIOS],[
+AC_REQUIRE([CF_XOPEN_SOURCE])
+
+AC_CHECK_HEADERS( \
+termio.h \
+termios.h \
+unistd.h \
+sys/ioctl.h \
+sys/termio.h \
+)
+
+if test "$ac_cv_header_termios_h" = yes ; then
+	case "$CFLAGS $CPPFLAGS" in
+	(*-D_POSIX_SOURCE*)
+		termios_bad=dunno ;;
+	(*)	termios_bad=maybe ;;
+	esac
+	if test "$termios_bad" = maybe ; then
+	AC_MSG_CHECKING(whether termios.h needs _POSIX_SOURCE)
+	AC_TRY_COMPILE([#include <termios.h>],
+		[struct termios foo; int x = foo.c_iflag],
+		termios_bad=no, [
+		AC_TRY_COMPILE([
+#define _POSIX_SOURCE
+#include <termios.h>],
+			[struct termios foo; int x = foo.c_iflag],
+			termios_bad=unknown,
+			termios_bad=yes AC_DEFINE(_POSIX_SOURCE,1,[Define to 1 if we must define _POSIX_SOURCE]))
+			])
+	AC_MSG_RESULT($termios_bad)
+	fi
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_SUBDIR_PATH version: 7 updated: 2014/12/04 04:33:06
 dnl --------------
 dnl Construct a search-list for a nonstandard header/lib-file
 dnl	$1 = the variable to return as result
@@ -3946,25 +4533,32 @@ AC_DEFUN([CF_SUBDIR_PATH],
 [
 $1=
 
-CF_ADD_SUBDIR_PATH($1,$2,$3,/usr,$prefix)
 CF_ADD_SUBDIR_PATH($1,$2,$3,$prefix,NONE)
-CF_ADD_SUBDIR_PATH($1,$2,$3,/usr/local,$prefix)
-CF_ADD_SUBDIR_PATH($1,$2,$3,/opt,$prefix)
-CF_ADD_SUBDIR_PATH($1,$2,$3,[$]HOME,$prefix)
+
+for cf_subdir_prefix in \
+	/usr \
+	/usr/local \
+	/usr/pkg \
+	/opt \
+	/opt/local \
+	[$]HOME
+do
+	CF_ADD_SUBDIR_PATH($1,$2,$3,$cf_subdir_prefix,$prefix)
+done
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_TERM_HEADER version: 3 updated: 2012/10/06 08:57:51
+dnl CF_TERM_HEADER version: 4 updated: 2015/04/15 19:08:48
 dnl --------------
 dnl Look for term.h, which is part of X/Open curses.  It defines the interface
 dnl to terminfo database.  Usually it is in the same include-path as curses.h,
 dnl but some packagers change this, breaking various applications.
 AC_DEFUN([CF_TERM_HEADER],[
 AC_CACHE_CHECK(for terminfo header, cf_cv_term_header,[
-case ${cf_cv_ncurses_header} in #(vi
-*/ncurses.h|*/ncursesw.h) #(vi
+case ${cf_cv_ncurses_header} in
+(*/ncurses.h|*/ncursesw.h)
 	cf_term_header=`echo "$cf_cv_ncurses_header" | sed -e 's%ncurses[[^.]]*\.h$%term.h%'`
 	;;
-*)
+(*)
 	cf_term_header=term.h
 	;;
 esac
@@ -3984,23 +4578,66 @@ done
 
 # Set definitions to allow ifdef'ing to accommodate subdirectories
 
-case $cf_cv_term_header in # (vi
-*term.h)
+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 # (vi
-ncurses/term.h) #(vi
+case $cf_cv_term_header in
+(ncurses/term.h)
 	AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
 	;;
-ncursesw/term.h)
+(ncursesw/term.h)
 	AC_DEFINE(HAVE_NCURSESW_TERM_H,1,[Define to 1 if we have ncursesw/term.h])
 	;;
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_TRY_XOPEN_SOURCE version: 1 updated: 2011/10/30 17:09:50
+dnl CF_TRIM_X_LIBS version: 3 updated: 2015/04/12 15:39:00
+dnl --------------
+dnl Trim extra base X libraries added as a workaround for inconsistent library
+dnl dependencies returned by "new" pkg-config files.
+AC_DEFUN([CF_TRIM_X_LIBS],[
+	for cf_trim_lib in Xmu Xt X11
+	do
+		case "$LIBS" in
+		(*-l$cf_trim_lib\ *-l$cf_trim_lib*)
+			LIBS=`echo "$LIBS " | sed -e 's/  / /g' -e 's%-l'"$cf_trim_lib"' %%' -e 's/ $//'`
+			CF_VERBOSE(..trimmed $LIBS)
+			;;
+		esac
+	done
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_TRY_PKG_CONFIG version: 5 updated: 2013/07/06 21:27:06
+dnl -----------------
+dnl This is a simple wrapper to use for pkg-config, for libraries which may be
+dnl available in that form.
+dnl
+dnl $1 = package name
+dnl $2 = extra logic to use, if any, after updating CFLAGS and LIBS
+dnl $3 = logic to use if pkg-config does not have the package
+AC_DEFUN([CF_TRY_PKG_CONFIG],[
+AC_REQUIRE([CF_PKG_CONFIG])
+
+if test "$PKG_CONFIG" != none && "$PKG_CONFIG" --exists $1; then
+	CF_VERBOSE(found package $1)
+	cf_pkgconfig_incs="`$PKG_CONFIG --cflags $1 2>/dev/null`"
+	cf_pkgconfig_libs="`$PKG_CONFIG --libs   $1 2>/dev/null`"
+	CF_VERBOSE(package $1 CFLAGS: $cf_pkgconfig_incs)
+	CF_VERBOSE(package $1 LIBS: $cf_pkgconfig_libs)
+	CF_ADD_CFLAGS($cf_pkgconfig_incs)
+	CF_ADD_LIBS($cf_pkgconfig_libs)
+	ifelse([$2],,:,[$2])
+else
+	cf_pkgconfig_incs=
+	cf_pkgconfig_libs=
+	ifelse([$3],,:,[$3])
+fi
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_TRY_XOPEN_SOURCE version: 2 updated: 2018/06/20 20:23:13
 dnl -------------------
 dnl If _XOPEN_SOURCE is not defined in the compile environment, check if we
 dnl can define it successfully.
@@ -4016,7 +4653,7 @@ make an error
 #endif],
 	[cf_cv_xopen_source=no],
 	[cf_save="$CPPFLAGS"
-	 CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
+	 CF_APPEND_TEXT(CPPFLAGS,-D_XOPEN_SOURCE=$cf_XOPEN_SOURCE)
 	 AC_TRY_COMPILE([
 #include <stdlib.h>
 #include <string.h>
@@ -4128,7 +4765,7 @@ AC_DEFUN([CF_VERBOSE],
 CF_MSG_LOG([$1])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_VERSION_INFO version: 6 updated: 2013/06/16 10:25:53
+dnl CF_VERSION_INFO version: 7 updated: 2015/04/17 21:13:04
 dnl ---------------
 dnl Define several useful symbols derived from the VERSION file.  A separate
 dnl file is preferred to embedding the version numbers in various scripts.
@@ -4178,12 +4815,12 @@ if test -f $srcdir/VERSION ; then
 	AC_MSG_CHECKING(for package patch date)
 	VERSION_PATCH=`echo "$cf_field3" | sed -e 's/^[[^-]]*-//'`
 	case .$VERSION_PATCH in
-	.)
+	(.)
 		AC_MSG_ERROR(missing patch-date $VERSION_PATCH)
 		;;
-	.[[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]])
+	(.[[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]][[0-9]])
 		;;
-	*)
+	(*)
 		AC_MSG_ERROR(illegal patch-date $VERSION_PATCH)
 		;;
 	esac
@@ -4247,7 +4884,54 @@ fi
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_ABI_VERSION version: 1 updated: 2003/09/20 18:12:49
+dnl CF_WIDEC_CURSES version: 5 updated: 2012/11/08 20:57:52
+dnl ---------------
+dnl Check for curses implementations that can handle wide-characters
+AC_DEFUN([CF_WIDEC_CURSES],
+[
+AC_CACHE_CHECK(if curses supports wide characters,cf_cv_widec_curses,[
+AC_TRY_LINK([
+#include <stdlib.h>
+#include <${cf_cv_ncurses_header:-curses.h}>],[
+    wchar_t temp[2];
+    wchar_t wch = 'A';
+    temp[0] = wch;
+    waddnwstr(stdscr, temp, 1);
+],
+[cf_cv_widec_curses=yes],
+[cf_cv_widec_curses=no])
+])
+
+if test "$cf_cv_widec_curses" = yes ; then
+	AC_DEFINE(WIDEC_CURSES,1,[Define to 1 if curses supports wide characters])
+
+	# This is needed on Tru64 5.0 to declare mbstate_t
+	AC_CACHE_CHECK(if we must include wchar.h to declare mbstate_t,cf_cv_widec_mbstate,[
+	AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <${cf_cv_ncurses_header:-curses.h}>],
+[mbstate_t state],
+[cf_cv_widec_mbstate=no],
+[AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <wchar.h>
+#include <${cf_cv_ncurses_header:-curses.h}>],
+[mbstate_t state],
+[cf_cv_widec_mbstate=yes],
+[cf_cv_widec_mbstate=unknown])])])
+
+if test "$cf_cv_widec_mbstate" = yes ; then
+	AC_DEFINE(NEED_WCHAR_H,1,[Define to 1 if we must include wchar.h])
+fi
+
+if test "$cf_cv_widec_mbstate" != unknown ; then
+	AC_DEFINE(HAVE_MBSTATE_T,1,[Define to 1 if we have mbstate_t type])
+fi
+
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_ABI_VERSION version: 3 updated: 2015/06/06 16:10:11
 dnl -------------------
 dnl Allow library's ABI to be overridden.  Generally this happens when a
 dnl packager has incremented the ABI past that used in the original package,
@@ -4258,10 +4942,21 @@ dnl symbol.
 AC_DEFUN([CF_WITH_ABI_VERSION],[
 test -z "$cf_cv_abi_version" && cf_cv_abi_version=0
 AC_ARG_WITH(abi-version,
-[  --with-abi-version=XXX  override derived ABI version],
-[AC_MSG_WARN(overriding ABI version $cf_cv_abi_version to $withval)
- cf_cv_abi_version=$withval])
- CF_NUMBER_SYNTAX($cf_cv_abi_version,ABI version)
+[  --with-abi-version=XXX  override derived ABI version],[
+	if test "x$cf_cv_abi_version" != "x$withval"
+	then
+		AC_MSG_WARN(overriding ABI version $cf_cv_abi_version to $withval)
+		case $cf_cv_rel_version in
+		(5.*)
+			cf_cv_rel_version=$withval.0
+			;;
+		(6.*)
+			cf_cv_rel_version=$withval.9	# FIXME: should be 10 as of 6.0 release
+			;;
+		esac
+	fi
+	cf_cv_abi_version=$withval])
+	CF_NUMBER_SYNTAX($cf_cv_abi_version,ABI version)
 ifelse($1,,,[
 $1_ABI=$cf_cv_abi_version
 ])
@@ -4321,7 +5016,52 @@ if test "$with_dmalloc" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_LIBTOOL version: 30 updated: 2013/09/07 13:54:05
+dnl CF_WITH_EXPORT_SYMS version: 3 updated: 2014/12/20 19:16:08
+dnl -------------------
+dnl Use this with libtool to specify the list of symbols that may be exported.
+dnl The input file contains one symbol per line; comments work with "#".
+dnl
+dnl $1 = basename of the ".sym" file (default $PACKAGE)
+AC_DEFUN([CF_WITH_EXPORT_SYMS],
+[
+AC_MSG_CHECKING(if exported-symbols file should be used)
+AC_ARG_WITH(export-syms,
+	[  --with-export-syms=XXX  limit exported symbols using libtool],
+	[with_export_syms=$withval],
+	[with_export_syms=no])
+if test "x$with_export_syms" = xyes
+then
+	with_export_syms='${top_srcdir}/package/ifelse($1,,${PACKAGE},[$1]).sym'
+	AC_SUBST(PACKAGE)
+fi
+AC_MSG_RESULT($with_export_syms)
+if test "x$with_export_syms" != xno
+then
+	EXPORT_SYMS="-export-symbols $with_export_syms"
+	AC_SUBST(EXPORT_SYMS)
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_INSTALL_PREFIX version: 4 updated: 2010/10/23 15:52:32
+dnl ----------------------
+dnl Configure-script option to give a default value for the poorly-chosen name
+dnl $(DESTDIR).
+AC_DEFUN([CF_WITH_INSTALL_PREFIX],
+[
+AC_MSG_CHECKING(for install-prefix)
+AC_ARG_WITH(install-prefix,
+	[  --with-install-prefix=XXX sets DESTDIR, useful for packaging],
+	[cf_opt_with_install_prefix=$withval],
+	[cf_opt_with_install_prefix=${DESTDIR:-no}])
+AC_MSG_RESULT($cf_opt_with_install_prefix)
+if test "$cf_opt_with_install_prefix" != no ; then
+	CF_PATH_SYNTAX(cf_opt_with_install_prefix)
+	DESTDIR=$cf_opt_with_install_prefix
+fi
+AC_SUBST(DESTDIR)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_LIBTOOL version: 35 updated: 2017/08/12 07:58:51
 dnl ---------------
 dnl Provide a configure option to incorporate libtool.  Define several useful
 dnl symbols for the makefile rules.
@@ -4345,7 +5085,7 @@ dnl
 dnl	LOCAL=aclocal.m4
 dnl	ORIG=aclocal.m4.orig
 dnl
-dnl	trap "mv $ORIG $LOCAL" 0 1 2 5 15
+dnl	trap "mv $ORIG $LOCAL" 0 1 2 3 15
 dnl	rm -f $ORIG
 dnl	mv $LOCAL $ORIG
 dnl
@@ -4404,7 +5144,7 @@ ifdef([AC_PROG_LIBTOOL],[
 		AC_MSG_ERROR(Cannot find libtool)
 	fi
 ])dnl
-	LIB_CREATE='${LIBTOOL} --mode=link ${CC} -rpath ${DESTDIR}${libdir} ${LIBTOOL_VERSION} `cut -f1 ${srcdir}/VERSION` ${LIBTOOL_OPTS} ${LT_UNDEF} $(LIBS) -o'
+	LIB_CREATE='${LIBTOOL} --mode=link ${CC} -rpath ${libdir} ${LIBTOOL_VERSION} `cut -f1 ${top_srcdir}/VERSION` ${LIBTOOL_OPTS} ${LT_UNDEF} $(LIBS) -o'
 	LIB_OBJECT='${OBJECTS:.o=.lo}'
 	LIB_SUFFIX=.la
 	LIB_CLEAN='${LIBTOOL} --mode=clean'
@@ -4418,20 +5158,20 @@ ifdef([AC_PROG_LIBTOOL],[
 
 	# special hack to add -no-undefined (which libtool should do for itself)
 	LT_UNDEF=
-	case "$cf_cv_system_name" in #(vi
-	cygwin*|msys*|mingw32*|uwin*|aix[[4-7]]) #(vi
+	case "$cf_cv_system_name" in
+	(cygwin*|msys*|mingw32*|os2*|uwin*|aix[[4-7]])
 		LT_UNDEF=-no-undefined
 		;;
 	esac
 	AC_SUBST([LT_UNDEF])
 
 	# special hack to add --tag option for C++ compiler
-	case $cf_cv_libtool_version in #(vi
-	1.[[5-9]]*|[[2-9]].[[0-9.a-z]]*) #(vi
+	case $cf_cv_libtool_version in
+	(1.[[5-9]]*|[[2-9]].[[0-9.a-z]]*)
 		LIBTOOL_CXX="$LIBTOOL --tag=CXX"
 		LIBTOOL="$LIBTOOL --tag=CC"
 		;;
-	*)
+	(*)
 		LIBTOOL_CXX="$LIBTOOL"
 		;;
 	esac
@@ -4459,7 +5199,7 @@ AC_SUBST(LIB_UNINSTALL)
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_LIBTOOL_OPTS version: 2 updated: 2007/04/08 18:14:54
+dnl CF_WITH_LIBTOOL_OPTS version: 4 updated: 2015/04/17 21:13:04
 dnl --------------------
 dnl Allow user to pass additional libtool options into the library creation
 dnl and link steps.  The main use for this is to do something like
@@ -4475,17 +5215,243 @@ AC_ARG_WITH(libtool-opts,
 AC_MSG_RESULT($with_libtool_opts)
 
 case .$with_libtool_opts in
-.yes|.no|.)
+(.yes|.no|.)
 	;;
-*)
-	LIBTOOL_OPTS=$with_libtool_opts
+(*)
+	LIBTOOL_OPTS="$LIBTOOL_OPTS $with_libtool_opts"
 	;;
 esac
 
 AC_SUBST(LIBTOOL_OPTS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_NO_LEAKS version: 2 updated: 2012/10/06 08:57:51
+dnl CF_WITH_MAN2HTML version: 7 updated: 2018/01/07 13:16:19
+dnl ----------------
+dnl Check for man2html and groff.  Prefer man2html over groff, but use groff
+dnl as a fallback.  See
+dnl
+dnl		http://invisible-island.net/scripts/man2html.html
+dnl
+dnl Generate a shell script which hides the differences between the two.
+dnl
+dnl We name that "man2html.tmp".
+dnl
+dnl The shell script can be removed later, e.g., using "make distclean".
+AC_DEFUN([CF_WITH_MAN2HTML],[
+AC_REQUIRE([CF_PROG_GROFF])
+
+case "x${with_man2html}" in
+(xno)
+	cf_man2html=no
+	;;
+(x|xyes)
+	AC_PATH_PROG(cf_man2html,man2html,no)
+	case "x$cf_man2html" in
+	(x/*)
+		AC_MSG_CHECKING(for the modified Earl Hood script)
+		if ( $cf_man2html -help 2>&1 | grep 'Make an index of headers at the end' >/dev/null )
+		then
+			cf_man2html_ok=yes
+		else
+			cf_man2html=no
+			cf_man2html_ok=no
+		fi
+		AC_MSG_RESULT($cf_man2html_ok)
+		;;
+	(*)
+		cf_man2html=no
+		;;
+	esac
+esac
+
+AC_MSG_CHECKING(for program to convert manpage to html)
+AC_ARG_WITH(man2html,
+	[  --with-man2html=XXX     use XXX rather than groff],
+	[cf_man2html=$withval],
+	[cf_man2html=$cf_man2html])
+
+cf_with_groff=no
+
+case $cf_man2html in
+(yes)
+	AC_MSG_RESULT(man2html)
+	AC_PATH_PROG(cf_man2html,man2html,no)
+	;;
+(no|groff|*/groff*)
+	cf_with_groff=yes
+	cf_man2html=$GROFF_PATH
+	AC_MSG_RESULT($cf_man2html)
+	;;
+(*)
+	AC_MSG_RESULT($cf_man2html)
+	;;
+esac
+
+MAN2HTML_TEMP="man2html.tmp"
+	cat >$MAN2HTML_TEMP <<CF_EOF
+#!$SHELL
+# Temporary script generated by CF_WITH_MAN2HTML
+# Convert inputs to html, sending result to standard output.
+#
+# Parameters:
+# \${1} = rootname of file to convert
+# \${2} = suffix of file to convert, e.g., "1"
+# \${3} = macros to use, e.g., "man"
+#
+ROOT=\[$]1
+TYPE=\[$]2
+MACS=\[$]3
+
+unset LANG
+unset LC_ALL
+unset LC_CTYPE
+unset LANGUAGE
+GROFF_NO_SGR=stupid
+export GROFF_NO_SGR
+
+CF_EOF
+
+if test "x$cf_with_groff" = xyes
+then
+	MAN2HTML_NOTE="$GROFF_NOTE"
+	MAN2HTML_PATH="$GROFF_PATH"
+	cat >>$MAN2HTML_TEMP <<CF_EOF
+$SHELL -c "$TBL_PATH \${ROOT}.\${TYPE} | $GROFF_PATH -P -o0 -I\${ROOT}_ -Thtml -\${MACS}"
+CF_EOF
+else
+	MAN2HTML_NOTE=""
+	CF_PATH_SYNTAX(cf_man2html)
+	MAN2HTML_PATH="$cf_man2html"
+	AC_MSG_CHECKING(for $cf_man2html top/bottom margins)
+
+	# for this example, expect 3 lines of content, the remainder is head/foot
+	cat >conftest.in <<CF_EOF
+.TH HEAD1 HEAD2 HEAD3 HEAD4 HEAD5
+.SH SECTION
+MARKER
+CF_EOF
+
+	LC_ALL=C LC_CTYPE=C LANG=C LANGUAGE=C $NROFF_PATH -man conftest.in >conftest.out
+
+	cf_man2html_1st=`fgrep -n MARKER conftest.out |sed -e 's/^[[^0-9]]*://' -e 's/:.*//'`
+	cf_man2html_top=`expr $cf_man2html_1st - 2`
+	cf_man2html_bot=`wc -l conftest.out |sed -e 's/[[^0-9]]//g'`
+	cf_man2html_bot=`expr $cf_man2html_bot - 2 - $cf_man2html_top`
+	cf_man2html_top_bot="-topm=$cf_man2html_top -botm=$cf_man2html_bot"
+
+	AC_MSG_RESULT($cf_man2html_top_bot)
+
+	AC_MSG_CHECKING(for pagesize to use)
+	for cf_block in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+	do
+	cat >>conftest.in <<CF_EOF
+.nf
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+CF_EOF
+	done
+
+	LC_ALL=C LC_CTYPE=C LANG=C LANGUAGE=C $NROFF_PATH -man conftest.in >conftest.out
+	cf_man2html_page=`fgrep -n HEAD1 conftest.out |tail -n 1 |sed -e 's/^[[^0-9]]*://' -e 's/:.*//'`
+	test -z "$cf_man2html_page" && cf_man2html_page=99999
+	test "$cf_man2html_page" -gt 100 && cf_man2html_page=99999
+
+	rm -rf conftest*
+	AC_MSG_RESULT($cf_man2html_page)
+
+	cat >>$MAN2HTML_TEMP <<CF_EOF
+: \${MAN2HTML_PATH=$MAN2HTML_PATH}
+MAN2HTML_OPTS="\$MAN2HTML_OPTS -index -title="\$ROOT\(\$TYPE\)" -compress -pgsize $cf_man2html_page"
+case \${TYPE} in
+(ms)
+	$TBL_PATH \${ROOT}.\${TYPE} | $NROFF_PATH -\${MACS} | \$MAN2HTML_PATH -topm=0 -botm=0 \$MAN2HTML_OPTS
+	;;
+(*)
+	$TBL_PATH \${ROOT}.\${TYPE} | $NROFF_PATH -\${MACS} | \$MAN2HTML_PATH $cf_man2html_top_bot \$MAN2HTML_OPTS
+	;;
+esac
+CF_EOF
+fi
+
+chmod 700 $MAN2HTML_TEMP
+
+AC_SUBST(MAN2HTML_NOTE)
+AC_SUBST(MAN2HTML_PATH)
+AC_SUBST(MAN2HTML_TEMP)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_NCURSES_ETC version: 5 updated: 2016/02/20 19:23:20
+dnl -------------------
+dnl Use this macro for programs which use any variant of "curses", e.g.,
+dnl "ncurses", and "PDCurses".  Programs that can use curses and some unrelated
+dnl library (such as slang) should use a "--with-screen=XXX" option.
+dnl
+dnl This does not use AC_DEFUN, because that would tell autoconf to run each
+dnl of the macros inside this one - before this macro.
+define([CF_WITH_NCURSES_ETC],[
+CF_WITH_CURSES_DIR
+
+cf_cv_screen=curses
+
+AC_MSG_CHECKING(for specified curses library type)
+AC_ARG_WITH(screen,
+	[  --with-screen=XXX       use specified curses-libraries],
+	[cf_cv_screen=$withval],[
+
+AC_ARG_WITH(ncursesw,
+	[  --with-ncursesw         use wide ncurses-libraries],
+	[cf_cv_screen=ncursesw],[
+
+AC_ARG_WITH(ncurses,
+	[  --with-ncurses          use ncurses-libraries],
+	[cf_cv_screen=ncurses],[
+
+AC_ARG_WITH(pdcurses,
+	[  --with-pdcurses         compile/link with pdcurses X11 library],
+	[cf_cv_screen=pdcurses],[
+
+AC_ARG_WITH(curses-colr,
+	[  --with-curses-colr      compile/link with HPUX 10.x color-curses],
+	[cf_cv_screen=curses_colr],[
+
+AC_ARG_WITH(curses-5lib,
+	[  --with-curses-5lib      compile/link with SunOS 5lib curses],
+	[cf_cv_screen=curses_5lib])])])])])])
+
+AC_MSG_RESULT($cf_cv_screen)
+
+case $cf_cv_screen in
+(curses|curses_*)
+	CF_CURSES_CONFIG
+	;;
+(ncursesw*)
+	CF_UTF8_LIB
+	CF_NCURSES_CONFIG($cf_cv_screen)
+	;;
+(ncurses*)
+	CF_NCURSES_CONFIG($cf_cv_screen)
+	;;
+(pdcurses)
+	CF_PDCURSES_X11
+	;;
+(*)
+	AC_MSG_ERROR(unexpected screen-value: $cf_cv_screen)
+	;;
+esac
+
+CF_NCURSES_PTHREADS($cf_cv_screen)
+
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_NO_LEAKS version: 3 updated: 2015/05/10 19:52:14
 dnl ----------------
 AC_DEFUN([CF_WITH_NO_LEAKS],[
 
@@ -4499,9 +5465,9 @@ AC_ARG_WITH(no-leaks,
 	[  --with-no-leaks         test: free permanent memory, analyze leaks],
 	[AC_DEFINE(NO_LEAKS,1,[Define to 1 to enable leak-checking])
 	 cf_doalloc=".${with_dmalloc}${with_dbmalloc}${with_purify}${with_valgrind}"
-	 case ${cf_doalloc} in #(vi
-	 *yes*) ;;
-	 *) AC_DEFINE(DOALLOC,10000,[Define to size of malloc-array]) ;;
+	 case ${cf_doalloc} in
+	 (*yes*) ;;
+	 (*) AC_DEFINE(DOALLOC,10000,[Define to size of malloc-array]) ;;
 	 esac
 	 with_no_leaks=yes],
 	[with_no_leaks=])
@@ -4543,7 +5509,7 @@ ifelse($1,,[
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_SHARED_OR_LIBTOOL version: 5 updated: 2013/09/02 09:17:44
+dnl CF_WITH_SHARED_OR_LIBTOOL version: 7 updated: 2014/11/02 16:11:49
 dnl -------------------------
 dnl Provide shared libraries using either autoconf macros (--with-shared) or
 dnl using the external libtool script (--with-libtool).
@@ -4570,6 +5536,10 @@ LIBTOOL_MAKE="#"
 MAKE_NORMAL=
 MAKE_STATIC=
 MAKE_SHARED="#"
+MAKE_DLLS="#"
+
+shlibdir=$libdir
+AC_SUBST(shlibdir)
 
 CF_WITH_LIBTOOL
 
@@ -4581,6 +5551,7 @@ if test "$with_libtool" = "yes" ; then
 	DFT_LWR_MODEL=$LIB_MODEL
 	LIBTOOL_MAKE=
 	CF_WITH_LIBTOOL_OPTS
+	CF_WITH_EXPORT_SYMS
 	MAKE_NORMAL="#"
 	MAKE_STATIC="#"
 	MAKE_SHARED=
@@ -4595,6 +5566,7 @@ else
 		LIB_MODEL=shared
 		DFT_LWR_MODEL=$LIB_MODEL
 		CF_SHARED_OPTS
+		CF_WITH_VERSIONED_SYMS
 		LIB_PREP=:
 		LIB_CREATE="[$]MK_SHARED_LIB"
 		CFLAGS="$CFLAGS $CC_SHARED_OPTS"
@@ -4615,6 +5587,7 @@ AC_SUBST(LIB_MODEL)
 
 AC_SUBST(LIBTOOL_MAKE)
 
+AC_SUBST(MAKE_DLLS)
 AC_SUBST(MAKE_NORMAL)
 AC_SUBST(MAKE_SHARED)
 AC_SUBST(MAKE_STATIC)
@@ -4628,6 +5601,133 @@ CF_NO_LEAKS_OPTION(valgrind,
 	[USE_VALGRIND])
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_WITH_VERSIONED_SYMS version: 7 updated: 2015/10/24 20:50:26
+dnl ----------------------
+dnl Use this when building shared library with ELF, to markup symbols with the
+dnl version identifier from the given input file.  Generally that identifier is
+dnl the same as the SONAME at which the symbol was first introduced.
+dnl
+dnl $1 = basename of the ".map" file (default $PACKAGE)
+AC_DEFUN([CF_WITH_VERSIONED_SYMS],
+[
+AC_MSG_CHECKING(if versioned-symbols file should be used)
+AC_ARG_WITH(versioned-syms,
+	[  --with-versioned-syms=X markup versioned symbols using ld],
+	[with_versioned_syms=$withval],
+	[with_versioned_syms=no])
+if test "x$with_versioned_syms" = xyes
+then
+	with_versioned_syms='${top_srcdir}/package/ifelse($1,,${PACKAGE},[$1]).map'
+	AC_SUBST(PACKAGE)
+fi
+AC_MSG_RESULT($with_versioned_syms)
+
+RESULTING_SYMS=
+VERSIONED_SYMS=
+WILDCARD_SYMS=
+
+if test "x$with_versioned_syms" != xno
+then
+	RESULTING_SYMS=$with_versioned_syms
+	case "x$MK_SHARED_LIB" in
+	(*-Wl,*)
+		VERSIONED_SYMS="-Wl,--version-script,\${RESULTING_SYMS}"
+		MK_SHARED_LIB=`echo "$MK_SHARED_LIB" | sed -e "s%-Wl,%\\[$]{VERSIONED_SYMS} -Wl,%"`
+		CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)
+		;;
+	(*-dy\ *)
+		VERSIONED_SYMS="-Wl,-M,\${RESULTING_SYMS}"
+		MK_SHARED_LIB=`echo "$MK_SHARED_LIB" | sed -e "s%-dy%\\[$]{VERSIONED_SYMS} -dy%"`
+		CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)
+		;;
+	(*)
+		AC_MSG_WARN(this system does not support versioned-symbols)
+		;;
+	esac
+
+	# Linux ld can selectively override scope, e.g., of symbols beginning with
+	# "_" by first declaring some as global, and then using a wildcard to
+	# declare the others as local.  Some other loaders cannot do this.  Check
+	# by constructing a (very) simple shared library and inspecting its
+	# symbols.
+	if test "x$VERSIONED_SYMS" != "x"
+	then
+		AC_MSG_CHECKING(if wildcards can be used to selectively omit symbols)
+		WILDCARD_SYMS=no
+
+		# make sources
+		rm -f conftest.*
+
+		cat >conftest.ver <<EOF
+module_1.0 {
+global:
+	globalf1;
+local:
+	localf1;
+};
+module_2.0 {
+global:
+	globalf2;
+local:
+	localf2;
+	_*;
+} module_1.0;
+submodule_1.0 {
+global:
+	subglobalf1;
+	_ismissing;
+local:
+	sublocalf1;
+};
+submodule_2.0 {
+global:
+	subglobalf2;
+local:
+	sublocalf2;
+	_*;
+} submodule_1.0;
+EOF
+		cat >conftest.$ac_ext <<EOF
+#line __oline__ "configure"
+int	_ismissing(void) { return 1; }
+int	_localf1(void) { return 1; }
+int	_localf2(void) { return 2; }
+int	globalf1(void) { return 1; }
+int	globalf2(void) { return 2; }
+int	_sublocalf1(void) { return 1; }
+int	_sublocalf2(void) { return 2; }
+int	subglobalf1(void) { return 1; }
+int	subglobalf2(void) { return 2; }
+EOF
+		cat >conftest.mk <<EOF
+CC=${CC}
+CFLAGS=${CFLAGS}
+CPPFLAGS=${CPPFLAGS}
+LDFLAGS=${LDFLAGS}
+LIBS=${LIBS}
+VERSIONED_SYMS=${VERSIONED_SYMS}
+RESULTING_SYMS=conftest.ver
+MK_SHARED_LIB=${MK_SHARED_LIB}
+conftest.so: conftest.$ac_cv_objext
+		\$(MK_SHARED_LIB) conftest.$ac_cv_objext
+EOF
+
+		# compile source, make library
+		if make -f conftest.mk 2>&AC_FD_CC >/dev/null
+		then
+			# test for missing symbol in either Data or Text section
+			cf_missing=`nm -P conftest.so 2>&AC_FD_CC |fgrep _ismissing | egrep '[[ 	]][[DT]][[ 	]]'`
+			test -n "$cf_missing" && WILDCARD_SYMS=yes
+		fi
+		AC_MSG_RESULT($WILDCARD_SYMS)
+		rm -f conftest.*
+	fi
+fi
+AC_SUBST(RESULTING_SYMS)
+AC_SUBST(VERSIONED_SYMS)
+AC_SUBST(WILDCARD_SYMS)
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_WITH_WARNINGS version: 5 updated: 2004/07/23 14:40:34
 dnl ----------------
 dnl Combine the checks for gcc features into a configure-script option
@@ -4651,7 +5751,7 @@ fi
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_CURSES version: 11 updated: 2011/01/18 18:15:30
+dnl CF_XOPEN_CURSES version: 14 updated: 2018/06/20 20:23:13
 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.
@@ -4661,7 +5761,8 @@ dnl as getbegy().  The latter is better design, but the former is standard.
 AC_DEFUN([CF_XOPEN_CURSES],
 [
 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
-AC_CACHE_CHECK(if we must define _XOPEN_SOURCE_EXTENDED,cf_cv_need_xopen_extension,[
+AC_CACHE_CHECK(definition to turn on extended curses functions,cf_cv_need_xopen_extension,[
+cf_cv_need_xopen_extension=unknown
 AC_TRY_LINK([
 #include <stdlib.h>
 #include <${cf_cv_ncurses_header:-curses.h}>],[
@@ -4670,14 +5771,6 @@ AC_TRY_LINK([
 	make an error
 #endif
 #endif
-	long x = winnstr(stdscr, "", 0);
-	int x1, y1;
-	getbegyx(stdscr, y1, x1)],
-	[cf_cv_need_xopen_extension=no],
-	[AC_TRY_LINK([
-#define _XOPEN_SOURCE_EXTENDED
-#include <stdlib.h>
-#include <${cf_cv_ncurses_header:-curses.h}>],[
 #ifdef NCURSES_VERSION
 	cchar_t check;
 	int check2 = curs_set((int)sizeof(check));
@@ -4685,12 +5778,35 @@ AC_TRY_LINK([
 	long x = winnstr(stdscr, "", 0);
 	int x1, y1;
 	getbegyx(stdscr, y1, x1)],
-	[cf_cv_need_xopen_extension=yes],
-	[cf_cv_need_xopen_extension=unknown])])])
-test $cf_cv_need_xopen_extension = yes && CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
+	[cf_cv_need_xopen_extension=none],
+	[
+	for cf_try_xopen_extension in _XOPEN_SOURCE_EXTENDED NCURSES_WIDECHAR
+	do
+		AC_TRY_LINK([
+#define $cf_try_xopen_extension 1
+#include <stdlib.h>
+#include <${cf_cv_ncurses_header:-curses.h}>],[
+#ifdef NCURSES_VERSION
+		cchar_t check;
+		int check2 = curs_set((int)sizeof(check));
+#endif
+		long x = winnstr(stdscr, "", 0);
+		int x1, y1;
+		getbegyx(stdscr, y1, x1)],
+		[cf_cv_need_xopen_extension=$cf_try_xopen_extension; break])
+	done
+	])
+])
+
+case $cf_cv_need_xopen_extension in
+(*_*)
+	CF_APPEND_TEXT(CPPFLAGS,-D$cf_cv_need_xopen_extension)
+	;;
+esac
+
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_SOURCE version: 45 updated: 2013/09/07 14:06:25
+dnl CF_XOPEN_SOURCE version: 53 updated: 2018/06/16 18:58:58
 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,
@@ -4706,21 +5822,21 @@ cf_XOPEN_SOURCE=ifelse([$1],,500,[$1])
 cf_POSIX_C_SOURCE=ifelse([$2],,199506L,[$2])
 cf_xopen_source=
 
-case $host_os in #(vi
-aix[[4-7]]*) #(vi
+case $host_os in
+(aix[[4-7]]*)
 	cf_xopen_source="-D_ALL_SOURCE"
 	;;
-cygwin|msys) #(vi
+(msys)
 	cf_XOPEN_SOURCE=600
 	;;
-darwin[[0-8]].*) #(vi
+(darwin[[0-8]].*)
 	cf_xopen_source="-D_APPLE_C_SOURCE"
 	;;
-darwin*) #(vi
+(darwin*)
 	cf_xopen_source="-D_DARWIN_C_SOURCE"
 	cf_XOPEN_SOURCE=
 	;;
-freebsd*|dragonfly*) #(vi
+(freebsd*|dragonfly*)
 	# 5.x headers associate
 	#	_XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
 	#	_XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L
@@ -4728,55 +5844,63 @@ freebsd*|dragonfly*) #(vi
 	cf_XOPEN_SOURCE=600
 	cf_xopen_source="-D_BSD_TYPES -D__BSD_VISIBLE -D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
 	;;
-hpux11*) #(vi
+(hpux11*)
 	cf_xopen_source="-D_HPUX_SOURCE -D_XOPEN_SOURCE=500"
 	;;
-hpux*) #(vi
+(hpux*)
 	cf_xopen_source="-D_HPUX_SOURCE"
 	;;
-irix[[56]].*) #(vi
+(irix[[56]].*)
 	cf_xopen_source="-D_SGI_SOURCE"
 	cf_XOPEN_SOURCE=
 	;;
-linux*|gnu*|mint*|k*bsd*-gnu) #(vi
-	CF_GNU_SOURCE
+(linux*|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin)
+	CF_GNU_SOURCE($cf_XOPEN_SOURCE)
 	;;
-mirbsd*) #(vi
+(minix*)
+	cf_xopen_source="-D_NETBSD_SOURCE" # POSIX.1-2001 features are ifdef'd with this...
+	;;
+(mirbsd*)
 	# setting _XOPEN_SOURCE or _POSIX_SOURCE breaks <sys/select.h> and other headers which use u_int / u_short types
 	cf_XOPEN_SOURCE=
 	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
 	;;
-netbsd*) #(vi
+(netbsd*)
 	cf_xopen_source="-D_NETBSD_SOURCE" # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
 	;;
-openbsd[[4-9]]*) #(vi
+(openbsd[[4-9]]*)
 	# setting _XOPEN_SOURCE lower than 500 breaks g++ compile with wchar.h, needed for ncursesw
 	cf_xopen_source="-D_BSD_SOURCE"
 	cf_XOPEN_SOURCE=600
 	;;
-openbsd*) #(vi
+(openbsd*)
 	# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
 	;;
-osf[[45]]*) #(vi
+(osf[[45]]*)
 	cf_xopen_source="-D_OSF_SOURCE"
 	;;
-nto-qnx*) #(vi
+(nto-qnx*)
 	cf_xopen_source="-D_QNX_SOURCE"
 	;;
-sco*) #(vi
+(sco*)
 	# setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
 	;;
-solaris2.*) #(vi
+(solaris2.*)
 	cf_xopen_source="-D__EXTENSIONS__"
+	cf_cv_xopen_source=broken
 	;;
-*)
+(sysv4.2uw2.*) # Novell/SCO UnixWare 2.x (tested on 2.1.2)
+	cf_XOPEN_SOURCE=
+	cf_POSIX_C_SOURCE=
+	;;
+(*)
 	CF_TRY_XOPEN_SOURCE
 	CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
 	;;
 esac
 
 if test -n "$cf_xopen_source" ; then
-	CF_ADD_CFLAGS($cf_xopen_source)
+	CF_ADD_CFLAGS($cf_xopen_source,true)
 fi
 
 dnl In anything but the default case, we may have system-specific setting
@@ -4809,7 +5933,339 @@ make an error
 fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF__ADD_SHLIB_RULES version: 4 updated: 2013/07/22 18:49:24
+dnl CF_X_ATHENA version: 23 updated: 2015/04/12 15:39:00
+dnl -----------
+dnl Check for Xaw (Athena) libraries
+dnl
+dnl Sets $cf_x_athena according to the flavor of Xaw which is used.
+AC_DEFUN([CF_X_ATHENA],
+[
+cf_x_athena=${cf_x_athena:-Xaw}
+
+AC_MSG_CHECKING(if you want to link with Xaw 3d library)
+withval=
+AC_ARG_WITH(Xaw3d,
+	[  --with-Xaw3d            link with Xaw 3d library])
+if test "$withval" = yes ; then
+	cf_x_athena=Xaw3d
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(if you want to link with Xaw 3d xft library)
+withval=
+AC_ARG_WITH(Xaw3dxft,
+	[  --with-Xaw3dxft         link with Xaw 3d xft library])
+if test "$withval" = yes ; then
+	cf_x_athena=Xaw3dxft
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(if you want to link with neXT Athena library)
+withval=
+AC_ARG_WITH(neXtaw,
+	[  --with-neXtaw           link with neXT Athena library])
+if test "$withval" = yes ; then
+	cf_x_athena=neXtaw
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(if you want to link with Athena-Plus library)
+withval=
+AC_ARG_WITH(XawPlus,
+	[  --with-XawPlus          link with Athena-Plus library])
+if test "$withval" = yes ; then
+	cf_x_athena=XawPlus
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+fi
+
+cf_x_athena_lib=""
+
+if test "$PKG_CONFIG" != none ; then
+	cf_athena_list=
+	test "$cf_x_athena" = Xaw && cf_athena_list="xaw8 xaw7 xaw6"
+	for cf_athena_pkg in \
+		$cf_athena_list \
+		${cf_x_athena} \
+		${cf_x_athena}-devel \
+		lib${cf_x_athena} \
+		lib${cf_x_athena}-devel
+	do
+		CF_TRY_PKG_CONFIG($cf_athena_pkg,[
+			cf_x_athena_lib="$cf_pkgconfig_libs"
+			CF_UPPER(cf_x_athena_LIBS,HAVE_LIB_$cf_x_athena)
+			AC_DEFINE_UNQUOTED($cf_x_athena_LIBS)
+
+			CF_TRIM_X_LIBS
+
+AC_CACHE_CHECK(for usable $cf_x_athena/Xmu package,cf_cv_xaw_compat,[
+AC_TRY_LINK([
+#include <X11/Xmu/CharSet.h>
+],[
+int check = XmuCompareISOLatin1("big", "small")
+],[cf_cv_xaw_compat=yes],[cf_cv_xaw_compat=no])])
+
+			if test "$cf_cv_xaw_compat" = no
+			then
+				# workaround for broken ".pc" files...
+				case "$cf_x_athena_lib" in
+				(*-lXmu*)
+					;;
+				(*)
+					CF_VERBOSE(work around broken package)
+					cf_save_xmu="$LIBS"
+					cf_first_lib=`echo "$cf_save_xmu" | sed -e 's/^[ ][ ]*//' -e 's/ .*//'`
+					CF_TRY_PKG_CONFIG(xmu,[
+							LIBS="$cf_save_xmu"
+							CF_ADD_LIB_AFTER($cf_first_lib,$cf_pkgconfig_libs)
+						],[
+							CF_ADD_LIB_AFTER($cf_first_lib,-lXmu)
+						])
+					CF_TRIM_X_LIBS
+					;;
+				esac
+			fi
+
+			break])
+	done
+fi
+
+if test -z "$cf_x_athena_lib" ; then
+	CF_X_EXT
+	CF_X_TOOLKIT
+	CF_X_ATHENA_CPPFLAGS($cf_x_athena)
+	CF_X_ATHENA_LIBS($cf_x_athena)
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_X_ATHENA_CPPFLAGS version: 6 updated: 2018/06/20 20:23:13
+dnl --------------------
+dnl Normally invoked by CF_X_ATHENA, with $1 set to the appropriate flavor of
+dnl the Athena widgets, e.g., Xaw, Xaw3d, neXtaw.
+AC_DEFUN([CF_X_ATHENA_CPPFLAGS],
+[
+cf_x_athena_root=ifelse([$1],,Xaw,[$1])
+cf_x_athena_inc=""
+
+for cf_path in default \
+	/usr/contrib/X11R6 \
+	/usr/contrib/X11R5 \
+	/usr/lib/X11R5 \
+	/usr/local
+do
+	if test -z "$cf_x_athena_inc" ; then
+		cf_save="$CPPFLAGS"
+		cf_test=X11/$cf_x_athena_root/SimpleMenu.h
+		if test $cf_path != default ; then
+			CPPFLAGS="$cf_save"
+			CF_APPEND_TEXT(CPPFLAGS,-I$cf_path/include)
+			AC_MSG_CHECKING(for $cf_test in $cf_path)
+		else
+			AC_MSG_CHECKING(for $cf_test)
+		fi
+		AC_TRY_COMPILE([
+#include <X11/Intrinsic.h>
+#include <$cf_test>],[],
+			[cf_result=yes],
+			[cf_result=no])
+		AC_MSG_RESULT($cf_result)
+		if test "$cf_result" = yes ; then
+			cf_x_athena_inc=$cf_path
+			break
+		else
+			CPPFLAGS="$cf_save"
+		fi
+	fi
+done
+
+if test -z "$cf_x_athena_inc" ; then
+	AC_MSG_WARN(
+[Unable to successfully find Athena header files with test program])
+elif test "$cf_x_athena_inc" != default ; then
+	CF_APPEND_TEXT(CPPFLAGS,-I$cf_x_athena_inc)
+fi
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_X_ATHENA_LIBS version: 12 updated: 2011/07/17 19:55:02
+dnl ----------------
+dnl Normally invoked by CF_X_ATHENA, with $1 set to the appropriate flavor of
+dnl the Athena widgets, e.g., Xaw, Xaw3d, neXtaw.
+AC_DEFUN([CF_X_ATHENA_LIBS],
+[AC_REQUIRE([CF_X_TOOLKIT])
+cf_x_athena_root=ifelse([$1],,Xaw,[$1])
+cf_x_athena_lib=""
+
+for cf_path in default \
+	/usr/contrib/X11R6 \
+	/usr/contrib/X11R5 \
+	/usr/lib/X11R5 \
+	/usr/local
+do
+	for cf_lib in \
+		${cf_x_athena_root} \
+		${cf_x_athena_root}7 \
+		${cf_x_athena_root}6
+	do
+	for cf_libs in \
+		"-l$cf_lib -lXmu" \
+		"-l$cf_lib -lXpm -lXmu" \
+		"-l${cf_lib}_s -lXmu_s"
+	do
+		if test -z "$cf_x_athena_lib" ; then
+			cf_save="$LIBS"
+			cf_test=XawSimpleMenuAddGlobalActions
+			if test $cf_path != default ; then
+				CF_ADD_LIBS(-L$cf_path/lib $cf_libs)
+				AC_MSG_CHECKING(for $cf_libs in $cf_path)
+			else
+				CF_ADD_LIBS($cf_libs)
+				AC_MSG_CHECKING(for $cf_test in $cf_libs)
+			fi
+			AC_TRY_LINK([
+#include <X11/Intrinsic.h>
+#include <X11/$cf_x_athena_root/SimpleMenu.h>
+],[
+$cf_test((XtAppContext) 0)],
+				[cf_result=yes],
+				[cf_result=no])
+			AC_MSG_RESULT($cf_result)
+			if test "$cf_result" = yes ; then
+				cf_x_athena_lib="$cf_libs"
+				break
+			fi
+			LIBS="$cf_save"
+		fi
+	done # cf_libs
+		test -n "$cf_x_athena_lib" && break
+	done # cf_lib
+done
+
+if test -z "$cf_x_athena_lib" ; then
+	AC_MSG_ERROR(
+[Unable to successfully link Athena library (-l$cf_x_athena_root) with test program])
+fi
+
+CF_UPPER(cf_x_athena_LIBS,HAVE_LIB_$cf_x_athena)
+AC_DEFINE_UNQUOTED($cf_x_athena_LIBS)
+])
+dnl ---------------------------------------------------------------------------
+dnl CF_X_EXT version: 3 updated: 2010/06/02 05:03:05
+dnl --------
+AC_DEFUN([CF_X_EXT],[
+CF_TRY_PKG_CONFIG(Xext,,[
+	AC_CHECK_LIB(Xext,XextCreateExtension,
+		[CF_ADD_LIB(Xext)])])
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_X_TOOLKIT version: 23 updated: 2015/04/12 15:39:00
+dnl ------------
+dnl Check for X Toolkit libraries
+AC_DEFUN([CF_X_TOOLKIT],
+[
+AC_REQUIRE([AC_PATH_XTRA])
+AC_REQUIRE([CF_CHECK_CACHE])
+
+# OSX is schizoid about who owns /usr/X11 (old) versus /opt/X11 (new), and (and
+# in some cases has installed dummy files in the former, other cases replaced
+# it with a link to the new location).  This complicates the configure script.
+# Check for that pitfall, and recover using pkg-config
+#
+# If none of these are set, the configuration is almost certainly broken.
+if test -z "${X_CFLAGS}${X_PRE_LIBS}${X_LIBS}${X_EXTRA_LIBS}"
+then
+	CF_TRY_PKG_CONFIG(x11,,[AC_MSG_WARN(unable to find X11 library)])
+	CF_TRY_PKG_CONFIG(ice,,[AC_MSG_WARN(unable to find ICE library)])
+	CF_TRY_PKG_CONFIG(sm,,[AC_MSG_WARN(unable to find SM library)])
+	CF_TRY_PKG_CONFIG(xt,,[AC_MSG_WARN(unable to find Xt library)])
+fi
+
+cf_have_X_LIBS=no
+
+CF_TRY_PKG_CONFIG(xt,[
+
+	case "x$LIBS" in
+	(*-lX11*)
+		;;
+	(*)
+# we have an "xt" package, but it may omit Xt's dependency on X11
+AC_CACHE_CHECK(for usable X dependency,cf_cv_xt_x11_compat,[
+AC_TRY_LINK([
+#include <X11/Xlib.h>
+],[
+	int rc1 = XDrawLine((Display*) 0, (Drawable) 0, (GC) 0, 0, 0, 0, 0);
+	int rc2 = XClearWindow((Display*) 0, (Window) 0);
+	int rc3 = XMoveWindow((Display*) 0, (Window) 0, 0, 0);
+	int rc4 = XMoveResizeWindow((Display*)0, (Window)0, 0, 0, 0, 0);
+],[cf_cv_xt_x11_compat=yes],[cf_cv_xt_x11_compat=no])])
+		if test "$cf_cv_xt_x11_compat" = no
+		then
+			CF_VERBOSE(work around broken X11 dependency)
+			# 2010/11/19 - good enough until a working Xt on Xcb is delivered.
+			CF_TRY_PKG_CONFIG(x11,,[CF_ADD_LIB_AFTER(-lXt,-lX11)])
+		fi
+		;;
+	esac
+
+AC_CACHE_CHECK(for usable X Toolkit package,cf_cv_xt_ice_compat,[
+AC_TRY_LINK([
+#include <X11/Shell.h>
+],[int num = IceConnectionNumber(0)
+],[cf_cv_xt_ice_compat=yes],[cf_cv_xt_ice_compat=no])])
+
+	if test "$cf_cv_xt_ice_compat" = no
+	then
+		# workaround for broken ".pc" files used for X Toolkit.
+		case "x$X_PRE_LIBS" in
+		(*-lICE*)
+			case "x$LIBS" in
+			(*-lICE*)
+				;;
+			(*)
+				CF_VERBOSE(work around broken ICE dependency)
+				CF_TRY_PKG_CONFIG(ice,
+					[CF_TRY_PKG_CONFIG(sm)],
+					[CF_ADD_LIB_AFTER(-lXt,$X_PRE_LIBS)])
+				;;
+			esac
+			;;
+		esac
+	fi
+
+	cf_have_X_LIBS=yes
+],[
+
+	LDFLAGS="$X_LIBS $LDFLAGS"
+	CF_CHECK_CFLAGS($X_CFLAGS)
+
+	AC_CHECK_FUNC(XOpenDisplay,,[
+	AC_CHECK_LIB(X11,XOpenDisplay,
+		[CF_ADD_LIB(X11)],,
+		[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+
+	AC_CHECK_FUNC(XtAppInitialize,,[
+	AC_CHECK_LIB(Xt, XtAppInitialize,
+		[AC_DEFINE(HAVE_LIBXT,1,[Define to 1 if we can compile with the Xt library])
+		 cf_have_X_LIBS=Xt
+		 LIBS="-lXt $X_PRE_LIBS $LIBS $X_EXTRA_LIBS"],,
+		[$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+])
+
+if test $cf_have_X_LIBS = no ; then
+	AC_MSG_WARN(
+[Unable to successfully link X Toolkit library (-lXt) with
+test program.  You will have to check and add the proper libraries by hand
+to makefile.])
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF__ADD_SHLIB_RULES version: 6 updated: 2016/04/21 21:07:50
 dnl -------------------
 dnl Append rules for creating, installing, uninstalling and cleaning library.
 dnl In particular, this is needed for shared libraries since there are symbolic
@@ -4830,10 +6286,10 @@ define([CF__ADD_SHLIB_RULES],[
 CF__DEFINE_LIB_TARGET
 
 case x$2 in
-xlibtool|xshared) #(vi
+(xlibtool|xshared)
 	cf_libdeps="ifelse($4,,,[$4])"
 	;;
-x*)
+(x*)
 	cf_libdeps=
 	;;
 esac
@@ -4887,7 +6343,7 @@ fi
 if test x$2 = xshared
 then
 cat >>$1 <<CF_EOF
-	- test -z "\$(DESTDIR)" && /sbin/ldconfig
+	- \$(SHELL) -c "if test -z "\$(DESTDIR)" ; then /sbin/ldconfig; fi"
 CF_EOF
 fi
 
@@ -4950,27 +6406,7 @@ char * XCursesProgramName = "test";
 #endif
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF__CURSES_HEAD version: 2 updated: 2010/10/23 15:54:49
-dnl ---------------
-dnl Define a reusable chunk which includes <curses.h> and <term.h> when they
-dnl are both available.
-define([CF__CURSES_HEAD],[
-#ifdef HAVE_XCURSES
-#include <xcurses.h>
-char * XCursesProgramName = "test";
-#else
-#include <${cf_cv_ncurses_header:-curses.h}>
-#if defined(NCURSES_VERSION) && defined(HAVE_NCURSESW_TERM_H)
-#include <ncursesw/term.h>
-#elif defined(NCURSES_VERSION) && defined(HAVE_NCURSES_TERM_H)
-#include <ncurses/term.h>
-#elif defined(HAVE_TERM_H)
-#include <term.h>
-#endif
-#endif
-])
-dnl ---------------------------------------------------------------------------
-dnl CF__DEFINE_LIB_TARGET version: 1 updated: 2013/07/22 18:27:50
+dnl CF__DEFINE_LIB_TARGET version: 2 updated: 2015/05/10 19:52:14
 dnl ---------------------
 define([CF__DEFINE_LIB_TARGET],[
 cf_libname=\${LIB_BASENAME}
@@ -4979,12 +6415,12 @@ cf_libroot=$cf_libname
 
 if test "x$cf_cv_do_symlinks" = xyes
 then
-	case "x$cf_cv_shlib_version" in #(vi
-	xrel) #(vi
+	case "x$cf_cv_shlib_version" in
+	(xrel)
 		cf_liblink="\${LIB_ABI_NAME}"
 		cf_libname="\${LIB_REL_NAME}"
 		;;
-	xabi)
+	(xabi)
 		cf_liblink="\${LIB_REL_NAME}"
 		cf_libname="\${LIB_ABI_NAME}"
 		;;
@@ -4993,12 +6429,12 @@ fi
 LIB_TARGET=$cf_libname
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF__DEFINE_SHLIB_VARS version: 2 updated: 2013/07/27 17:38:32
+dnl CF__DEFINE_SHLIB_VARS version: 4 updated: 2015/09/28 17:49:10
 dnl ---------------------
 dnl Substitute makefile variables useful for CF__ADD_SHLIB_RULES.
 dnl
 dnl The substitution requires these variables:
-dnl		LIB_PREFI - "lib"
+dnl		LIB_PREFIX - "lib"
 dnl		LIB_ROOTNAME - "foo"
 dnl		LIB_SUFFIX - ".so"
 dnl		REL_VERSION - "5.0"
@@ -5006,7 +6442,7 @@ dnl		ABI_VERSION - "4.2.4"
 define([CF__DEFINE_SHLIB_VARS],[
 CF__DEFINE_LIB_TARGET
 SET_SHLIB_VARS="# begin CF__DEFINE_SHLIB_VARS\\
-LIB_BASENAME	= ${LIB_PREFIX}\${LIB_ROOTNAME}\${LIB_SUFFIX}\\
+LIB_BASENAME	= \${LIB_PREFIX}\${LIB_ROOTNAME}\${LIB_SUFFIX}\\
 LIB_REL_NAME	= \${LIB_BASENAME}.\${REL_VERSION}\\
 LIB_ABI_NAME	= \${LIB_BASENAME}.\${ABI_VERSION}\\
 LIB_TARGET	= $LIB_TARGET\\
@@ -5049,15 +6485,17 @@ cf_cv_do_symlinks="$cf_cv_do_symlinks"
 cf_cv_shlib_version="$cf_cv_shlib_version"
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF__INTL_BODY version: 1 updated: 2007/07/26 17:35:47
+dnl CF__INTL_BODY version: 3 updated: 2017/07/10 20:13:33
 dnl -------------
 dnl Test-code needed for libintl compile-checks
 dnl $1 = parameter 2 from AM_WITH_NLS
 define([CF__INTL_BODY],[
-    bindtextdomain ("", "");
-    return (int) gettext ("")
-            ifelse([$1], need-ngettext, [ + (int) ngettext ("", "", 0)], [])
-            [ + _nl_msg_cat_cntr]
+	bindtextdomain ("", "");
+	return (int) gettext ("")
+			ifelse([$1], need-ngettext, [ + (int) ngettext ("", "", 0)], [])
+#ifndef IGNORE_MSGFMT_HACK
+			[ + _nl_msg_cat_cntr]
+#endif
 ])
 dnl ---------------------------------------------------------------------------
 dnl CF__INTL_HEAD version: 1 updated: 2007/07/26 17:35:47
@@ -5068,7 +6506,7 @@ define([CF__INTL_HEAD],[
 extern int _nl_msg_cat_cntr;
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl jm_GLIBC21 version: 3 updated: 2002/10/27 23:21:42
+dnl jm_GLIBC21 version: 4 updated: 2015/05/10 19:52:14
 dnl ----------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -5079,10 +6517,10 @@ dnl
 dnl Test for the GNU C Library, version 2.1 or newer.
 dnl From Bruno Haible.
 AC_DEFUN([jm_GLIBC21],
-  [
-    AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
-      ac_cv_gnu_library_2_1,
-      [AC_EGREP_CPP([Lucky GNU user],
+[
+AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
+	ac_cv_gnu_library_2_1,
+	[AC_EGREP_CPP([Lucky GNU user],
 	[
 #include <features.h>
 #ifdef __GNU_LIBRARY__
@@ -5092,10 +6530,7 @@ AC_DEFUN([jm_GLIBC21],
 #endif
 	],
 	ac_cv_gnu_library_2_1=yes,
-	ac_cv_gnu_library_2_1=no)
-      ]
-    )
-    AC_SUBST(GLIBC21)
-    GLIBC21="$ac_cv_gnu_library_2_1"
-  ]
-)
+	ac_cv_gnu_library_2_1=no)])
+	AC_SUBST(GLIBC21)
+	GLIBC21="$ac_cv_gnu_library_2_1"
+])