Add filesys dir.

diff --git a/src/Makefile b/src/Makefile
index 72b234a1312739b7d8dafaf735409f6fde5e3012..9242a7a1ce6757bb9dffc202389c3551c2da00a3 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,9 +1,11 @@
+SUBDIRS = threads filesys
+
 all::
-       @echo "Run 'make' in the threads, userprog, filesys, or vm directory."
+       @echo "Run 'make' in subdirectories $(SUBDIRS)."
        @echo "This top-level make has only 'clean' targets."
 
 clean::
-       for d in threads; do $(MAKE) -C $$d $@; done
+       for d in $(SUBDIRS); do $(MAKE) -C $$d $@; done
 
 distclean::
        $(MAKE) clean