Unfortunatly, adding prerequisite to "$(obj)/ss/built_in.o" doesn't
work because we have "$(obj)/%/built_in.o: $(obj)/% ;" in Rules.mk.
So, make is allow to try to build objects in "xsm/flask/ss/" before
generating the headers.
Adding a prerequisite on "$(obj)/ss" instead will fix the issue has
that the target used to run make in this subdirectory.
Unfortunatly, that target is also used when running `make clean`, so
we need to ignore it in this case. $(MAKECMDGOALS) can't be used in
this case as it is empty, but we can guess which operation is done by
looking at the list of loaded makefiles.
Fixes: 7a3bcd2babcc ("build: build everything from the root dir, use
obj=$subdir")
Reported-by: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
xen/xsm/flask/Makefile | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/xen/xsm/flask/Makefile b/xen/xsm/flask/Makefile
index d25312f4fa..2d24346ee3 100644
--- a/xen/xsm/flask/Makefile
+++ b/xen/xsm/flask/Makefile
@@ -16,7 +16,11 @@ FLASK_H_FILES := flask.h class_to_string.h
initial_sid_to_string.h
AV_H_FILES := av_perm_to_string.h av_permissions.h
ALL_H_FILES := $(addprefix include/,$(FLASK_H_FILES) $(AV_H_FILES))
-$(addprefix $(obj)/,$(obj-y)) $(obj)/ss/built_in.o: $(addprefix $(obj)/,$(ALL_H_FILES))
+# Adding prerequisite to descending into ss/ folder only when not running `make
+# clean`.
+ifeq ($(filter %/Makefile.clean,$(MAKEFILE_LIST)),)
+$(addprefix $(obj)/,$(obj-y)) $(obj)/ss: $(addprefix $(obj)/,$(ALL_H_FILES))
+endif
extra-y += $(ALL_H_FILES)
mkflask := $(srcdir)/policy/mkflask.sh
