--- a/common/autoconf/spec.gmk.in	Wed Feb 12 17:03:39 2014 -0800
+++ b/common/autoconf/spec.gmk.in	Thu Feb 13 23:30:08 2014 +0100
@@ -48,6 +48,9 @@
 
 endef
 
+# The command line given to configure.
+CONFIGURE_COMMAND_LINE:=@CONFIGURE_COMMAND_LINE@
+
 # A self-referential reference to this file.
 SPEC:=@SPEC@