makefiles: Add rules for cross-compiling static libraries.
diff --git a/dlls/Makeimplib.rules.in b/dlls/Makeimplib.rules.in
index 380101f..da36eee 100644
--- a/dlls/Makeimplib.rules.in
+++ b/dlls/Makeimplib.rules.in
@@ -21,6 +21,11 @@
 	$(AR) $(ARFLAGS) $@ $(OBJS)
 	$(RANLIB) $@
 
+$(MODULE:%=lib%.cross.a): $(CROSSOBJS) Makefile.in
+	$(RM) $@
+	$(CROSSAR) $(ARFLAGS) $@ $(CROSSOBJS)
+	$(CROSSRANLIB) $@
+
 # Rules for installation
 
 install install-dev:: $(MODULE:%=lib%.a) $(DESTDIR)$(dlldir)