diff --git a/Jump-exec/makefile b/Jump-exec/makefile
new file mode 100644
index 0000000..6073095
--- /dev/null
+++ b/Jump-exec/makefile
@@ -0,0 +1,13 @@
+SUBDIRS := $(wildcard */)
+
+.PHONY: all $(SUBDIRS)
+
+all: $(SUBDIRS)
+
+$(SUBDIRS):
+	@if [ -f $@/makefile ]; then \
+		echo "Building $@"; \
+		$(MAKE) -C $@; \
+	else \
+		echo "Skipping $@ (makefile not found)"; \
+	fi