bctest changes for Ultrix (don't return 1 from bctest, otherwise make aborts)
diff --git a/test/bctest b/test/bctest
index fbe74ed..bdb3218 100755
--- a/test/bctest
+++ b/test/bctest
@@ -104,5 +104,8 @@
 done
 
 echo "No working bc found.  Consider installing GNU bc." >&2
-echo "cat >/dev/null"
+if [ "$1" = ignore ]; then
+  echo "cat >/dev/null"
+  exit 0
+fi
 exit 1