build: fix race condition building enam.o

R=golang-dev, rsc
CC=albert.strasheim, golang-dev
https://golang.org/cl/4240055

diff --git a/src/cmd/Makefile b/src/cmd/Makefile
index b78574bae235657bf90cf2d2aed4d5e7e8df3d04..104e9f5df3406df4763a33a197f1876fcd379e3b 100644 (file)
--- a/src/cmd/Makefile
+++ b/src/cmd/Makefile
@@ -55,11 +55,9 @@ clean: $(patsubst %,%.clean,$(CLEANDIRS))
        @echo
        $(MAKE) -C $* install
 
-gc.install: cc.install
-
-$(O)c.install: cc.install
-
+gc.install $(O)c.install: cc.install
 $(O)g.install: gc.install
+$(O)a.install $(O)c.install $(O)g.install: $(O)l.install
 
 %.clean:
        $(MAKE) -C $* clean