quite as unused as I thought ... how embarrassing.
# to catch null pointer dereferences, and specify -E to make all symbols
# visible to dynamically linked shared libraries.
LDFLAGS+= -Wl,+b -Wl,$(LIBDIR) -Wl,-z -Wl,-E
+
+# Rule for building shared libs (currently used only for regression test
+# shlib ... should go away, since this is not really enough knowledge)
+%.sl: %.o
+ $(LD) -b -o $@ $<