A better approach.

configure

@@ -0,0 +1,18 @@
+#!/bin/bash -x
+
+# This presently just does two things:  compiles skas-or-tt, and then edits 
+# the Makefile to the MODE of the system.
+
+SKAS_OR_TT_DIR=skas-or-tt
+
+#skas-or-tt:
+
+if [ ! -f $SKAS_OR_TT_DIR/skas-or-tt ] ; then \
+	make -C $SKAS_OR_TT_DIR; \
+	strip -s $SKAS_OR_TT_DIR/skas-or-tt; \
+fi;
+
+	perl -e 'open(IT,"skas-or-tt/skas-or-tt|") or die "Trouble opening skas-or-tt/skas-or-tt\n"; while (<IT>) { if (!m,not found$$,) { $it = "skas"; } else { $it = "tt"; } } system "perl -pi -e \"s/MODE=tt\n/MODE=skas\n/g\" Makefile" if $it eq "skas"; system "perl -pi -e \"s/MODE=skas\n/MODE=tt\n/g\" Makefile" if $it eq "tt"; ' 
+
+
+