Made the OOM-shim package makefile work

packages/base/any/oom_shim/builds/Makefile

@@ -1,9 +1,27 @@
 include $(ONL)/make/any.mk
 
+ifndef TOOLCHAIN
+$(error Must define $$TOOLCHAIN to use this Makefile)
+endif
 
-liboom_shim.so:
-	@$(CC) -o liboom_shim.so -shared -PIC liboom_shim.c
+ifndef RELEASE
+$(warn Assuming RELEASE is wheezy -- FIXME)
+RELEASE=wheezy
+endif
+
+PACKAGE=oom_shim
+
+OUTDIR=$(ONL)/packages/base/$(ARCH)/$(PACKAGE)/builds/BUILD/$(RELEASE)/$(TOOLCHAIN)
+
+VPATH=$(ONL)/packages/base/any/$(PACKAGE)/src
+
+$(OUTDIR)/liboom_shim.so: oom_shim.c
+	@mkdir -p $(OUTDIR) || true
+	@$(CC) -o $(OUTDIR)/liboom_shim.so -shared -fPIC $+
 
 .PHONY: deb
 deb:
 	$(MAKE) -C deb
+
+clean:
+	rm -rf $(OUTDIR)