Require makefile to build dep. Fixes #218.

core/deps.mk

@@ -37,7 +37,8 @@ deps:: $(ALL_DEPS_DIRS)
 		if [ -f $$dep/GNUmakefile ] || [ -f $$dep/makefile ] || [ -f $$dep/Makefile ] ; then \
 			$(MAKE) -C $$dep ; \
 		else \
-			echo "include $(CURDIR)/erlang.mk" | ERLC_OPTS=+debug_info $(MAKE) -f - -C $$dep ; \
+			echo "ERROR: No makefile to build dependency $$dep. Consider adding it to AUTOPATCH." ; \
+			exit 1 ; \
 		fi ; \
 	done
 

erlang.mk

@@ -142,7 +142,8 @@ deps:: $(ALL_DEPS_DIRS)
 		if [ -f $$dep/GNUmakefile ] || [ -f $$dep/makefile ] || [ -f $$dep/Makefile ] ; then \
 			$(MAKE) -C $$dep ; \
 		else \
-			echo "include $(CURDIR)/erlang.mk" | ERLC_OPTS=+debug_info $(MAKE) -f - -C $$dep ; \
+			echo "ERROR: No makefile to build dependency $$dep. Consider adding it to AUTOPATCH." ; \
+			exit 1 ; \
 		fi ; \
 	done