In src/distrib/sets, it looks like makeflist is still looking
for USE_NEW_TOOLCHAIN, which was breaking my cross-build/release
of current for the sparc. I assume at some point the tc.old files
will go away, but for now it seems to be enough to fix makeflist.
This worked for me:

Index: makeflist
===================================================================
RCS file: /cvsroot/basesrc/distrib/sets/makeflist,v
retrieving revision 1.50
diff -u -r1.50 makeflist
--- makeflist	2002/08/10 02:01:00	1.50
+++ makeflist	2002/09/21 16:55:58
@@ -12,7 +12,6 @@
 machine_arch=`${MAKE} print_machine_arch`
 machine_cpu=`${MAKE} print_machine_cpu`
 object_fmt=`${MAKE} print_object_fmt`
-tc=`${MAKE} print_use_new_toolchain`
 x11_version=`${MAKE} print_x11_version`
 setd=`pwd`
 nlists="base comp etc games man misc text"
@@ -135,18 +134,12 @@
 			cat $setd/lists/$setname/lint.mi
 		fi
 	fi
-	if [ "$tc" = "yes" ]; then
-		if [ -f $setd/lists/$setname/tc.mi ]; then
-			cat $setd/lists/$setname/tc.mi
-		fi
-		if [ "$shlib" != "no" ]; then
-			if [ -f $setd/lists/$setname/tc.shl ]; then
-				cat $setd/lists/$setname/tc.shl
-			fi
-		fi
-	else
-		if [ -f $setd/lists/$setname/tc.old ]; then
-			cat $setd/lists/$setname/tc.old
+	if [ -f $setd/lists/$setname/tc.mi ]; then
+		cat $setd/lists/$setname/tc.mi
+	fi
+	if [ "$shlib" != "no" ]; then
+		if [ -f $setd/lists/$setname/tc.shl ]; then
+			cat $setd/lists/$setname/tc.shl
 		fi
 	fi
 done | awk -- '/^[^#]/ {print $1}' | sort -u
===================================================================

					Gary D. Duzan