--- /dev/null
+#! /bin/bash -norc
+dnl This file is an input file used by the GNU "autoconf" program to
+dnl generate the file "configure", which is run during Tk installation
+dnl to configure the system for the local environment.
+
+dnl Ensure that the config (auto)headers support is used, then just
+dnl include the configure sources from ../unix:
+
+m4_include(../unix/aclocal.m4)
+m4_define(SC_USE_CONFIG_HEADERS)
+m4_include(../unix/configure.in)