--- old/common/autoconf/spec.gmk.in	2015-02-05 15:29:08.290799183 +0100
+++ new/common/autoconf/spec.gmk.in	2015-02-05 15:29:08.198795348 +0100
@@ -323,6 +323,8 @@
 
 CFLAGS_WARNINGS_ARE_ERRORS:=@CFLAGS_WARNINGS_ARE_ERRORS@
 
+CFLAGS_CCACHE:=@CFLAGS_CCACHE@
+
 # Tools that potentially need to be cross compilation aware.
 CC:=@FIXPATH@ @CCACHE@ @CC@