--- a/common/autoconf/spec.gmk.in	Wed Nov 26 14:59:10 2014 +0100
+++ b/common/autoconf/spec.gmk.in	Wed Nov 26 15:14:14 2014 +0100
@@ -36,6 +36,7 @@
 X:=
 SPACE:=$(X) $(X)
 COMMA:=,
+DOLLAR:=$$
 HASH:=\#
 LEFT_PAREN:=(
 RIGHT_PAREN:=)