Makefile: fix install-tests

The top-level makefile make uses of internal implementation detail of
the xen build system. Avoid that by creating a new target
"install-tests" in xen/Makefile, and by fixing the top-level Makefile
to not call xen/Rules.mk anymore.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

Makefile

@@ -155,13 +155,11 @@ install-docs:
 # We only have build-tests install-tests, not uninstall-tests etc.
 .PHONY: build-tests
 build-tests: build-xen
-	export BASEDIR=$(XEN_ROOT)/xen; \
+	$(MAKE) -C xen tests
-	$(MAKE) -f $$BASEDIR/Rules.mk -C xen/test build
 
 .PHONY: install-tests
 install-tests: install-xen
-	export BASEDIR=$(XEN_ROOT)/xen; \
+	$(MAKE) -C xen $@
-	$(MAKE) -f $$BASEDIR/Rules.mk -C xen/test install
 
 # build xen and the tools and place them in the install
 # directory. 'make install' should then copy them to the normal system

xen/Makefile

@@ -90,6 +90,9 @@ _install: $(TARGET)$(CONFIG_XEN_INSTALL_SUFFIX)
 .PHONY: _tests
 _tests:
 	$(MAKE) -f $(BASEDIR)/Rules.mk -C test tests
+.PHONY: install-tests
+install-tests:
+	$(MAKE) -f $(BASEDIR)/Rules.mk -C test install
 
 .PHONY: _uninstall
 _uninstall: D=$(DESTDIR)