build: remove intermediate yacc files in Make.ccmd

R=rsc
CC=golang-dev
https://golang.org/cl/3545042

diff --git a/src/Make.ccmd b/src/Make.ccmd
index fe53f5d054b4671c153f2b835e448f65024672bc..cb2b255123a13c401eadeb49b5b430c9b5a44100 100644 (file)
--- a/src/Make.ccmd
+++ b/src/Make.ccmd
@@ -13,6 +13,8 @@ $(TARG): $(OFILES) $(LIB)
 
 $(OFILES): $(HFILES)
 
+CLEANFILES+=y.tab.[ch]
+
 clean:
        rm -f *.$(HOST_O) $(TARG) $(CLEANFILES)