--- a/stage1_2/Makefile.in	Fri Aug 26 11:29:43 2011 +0100
+++ b/stage1_2/Makefile.in	Thu Aug 25 08:56:28 2011 +0200
@@ -199,6 +199,11 @@
 # Make sure this header file is generated first (by bison), as it is included
 # by other C++ code that will also be compiled.
 BUILT_SOURCES = iec_bison.h
+CLEANFILES = \
+	iec_flex.cc \
+	iec_bison.cc \
+	iec_bison.h
+
 lib_LIBRARIES = libstage1_2.a
 libstage1_2_a_SOURCES = \
 	iec_flex.ll \
@@ -463,6 +468,7 @@
 mostlyclean-generic:
 
 clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
 
 distclean-generic:
 	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)