Index: configure
===================================================================
diff -u -r6c86fa6bef2f9e07b87cc7913398e86dd9af8316 -r5f986f77097e53f96b60f28a7ccabeb2411f67a0
--- configure	(.../configure)	(revision 6c86fa6bef2f9e07b87cc7913398e86dd9af8316)
+++ configure	(.../configure)	(revision 5f986f77097e53f96b60f28a7ccabeb2411f67a0)
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for xotcl 1.6.8.
+# Generated by GNU Autoconf 2.69 for xotcl 1.6.9.
 #
 # Report bugs to <xotcl@alice.wu-wien.ac.at>.
 #
@@ -580,8 +580,8 @@
 # Identity of this package.
 PACKAGE_NAME='xotcl'
 PACKAGE_TARNAME='xotcl'
-PACKAGE_VERSION='1.6.8'
-PACKAGE_STRING='xotcl 1.6.8'
+PACKAGE_VERSION='1.6.9'
+PACKAGE_STRING='xotcl 1.6.9'
 PACKAGE_BUGREPORT='xotcl@alice.wu-wien.ac.at'
 PACKAGE_URL=''
 
@@ -783,6 +783,7 @@
 with_xowish
 with_all
 with_expat
+enable_forward_compat86
 with_tcl
 with_tk
 with_tkinclude
@@ -1345,7 +1346,7 @@
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures xotcl 1.6.8 to adapt to many kinds of systems.
+\`configure' configures xotcl 1.6.9 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1406,14 +1407,16 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of xotcl 1.6.8:";;
+     short | recursive ) echo "Configuration of xotcl 1.6.9:";;
    esac
   cat <<\_ACEOF
 
 Optional Features:
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --forward-compat86      build XOTcl und Tcl 8.5 with forward compatibilit
+                          for Tcl 8.6 (default: disabled)
   --enable-threads        build with threads
   --enable-shared         build and link with shared libraries (default: on)
   --enable-64bit          enable 64bit support (default: off)
@@ -1524,7 +1527,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-xotcl configure 1.6.8
+xotcl configure 1.6.9
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1893,7 +1896,7 @@
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by xotcl $as_me 1.6.8, which was
+It was created by xotcl $as_me 1.6.9, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2461,6 +2464,14 @@
 fi
 
 
+# Check whether --enable-forward-compat86 was given.
+if test "${enable_forward_compat86+set}" = set; then :
+  enableval=$enable_forward_compat86; enable_forwardcompat=$enableval
+else
+  enable_forwardcompat=no
+fi
+
+
 subdirs=""
 
 if test "$with_all" = yes; then
@@ -2490,8 +2501,14 @@
    fi
 fi
 
+if test "$enable_forwardcompat" = yes; then
 
+$as_echo "#define XOTCL_FORWARD_COMPAT86 1" >>confdefs.h
 
+fi
+
+
+
 if test "$with_tk" = no; then with_xowish="" ; fi
 if test "$with_xotclsh" = yes; then XOTCLSH="xotclsh" ; else XOTCLSH=""; fi
 if test "$with_xowish" = yes;  then XOWISH="xowish"   ; else XOWISH=""; fi
@@ -9877,7 +9894,7 @@
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by xotcl $as_me 1.6.8, which was
+This file was extended by xotcl $as_me 1.6.9, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -9930,7 +9947,7 @@
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-xotcl config.status 1.6.8
+xotcl config.status 1.6.9
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"