ASSEM_SRC = x86-assem.S
ARCH_SRC = x86-arch.c
-OS_SRC = bsd-os.c undefineds.c x86-bsd-os.c
+OS_SRC = bsd-os.c x86-bsd-os.c
OS_LIBS = # -ldl
GC_SRC = gencgc.c
+
+# Nothing to do for after-grovel-headers.
+.PHONY: after-grovel-headers
+after-grovel-headers: