diff --git a/open_mode/GNUmakefile b/open_mode/GNUmakefile
new file mode 100644
index 0000000..f1c4f47
--- /dev/null
+++ b/open_mode/GNUmakefile
@@ -0,0 +1,6 @@
+CC = gcc -std=c99
+
+open_mode:
+
+clean:
+	rm open_mode