build: move xenlibs-dependencies make definition to uselibs.mk

In order to be able to use the xenlibs-dependencies macro from stubdom
build, move it to tools/libs/uselibs.mk, which is included from
current users and stubdom/Makefile.

No functional change intended.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Anthony PERARD <anthony.perard@vates.tech>

tools/Rules.mk

@@ -81,13 +81,6 @@ endif
 # include any CFLAGS or LDLIBS relating to libbar or libbaz unless
 # they use those libraries directly (not via libfoo) too.
 
-# Give the list of Xen library that the libraries in $(1) are linked against,
-# directly or indirectly.
-define xenlibs-dependencies
-    $(sort $(foreach lib,$(1), \
-        $(USELIBS_$(lib)) $(call xenlibs-dependencies,$(USELIBS_$(lib)))))
-endef
-
 # Flags for linking recursive dependencies of Xen libraries in $(1)
 define xenlibs-rpath
     $(addprefix -Wl$(comma)-rpath-link=$(XEN_ROOT)/tools/libs/,$(call xenlibs-dependencies,$(1)))

tools/libs/uselibs.mk

@@ -31,3 +31,10 @@ USELIBS_light := toollog evtchn toolcore ctrl store hypfs guest
 LIBS_LIBS += util
 USELIBS_util := light
 FILENAME_util := xlutil
+
+# Give the list of Xen library that the libraries in $(1) are linked against,
+# directly or indirectly.
+define xenlibs-dependencies
+    $(sort $(foreach lib,$(1), \
+        $(USELIBS_$(lib)) $(call xenlibs-dependencies,$(USELIBS_$(lib)))))
+endef