forgot to add a file...
diff --git a/aos/common/controls/controls.gyp b/aos/common/controls/controls.gyp
new file mode 100644
index 0000000..0551fe3
--- /dev/null
+++ b/aos/common/controls/controls.gyp
@@ -0,0 +1,19 @@
+{
+  'targets': [
+    {
+      'target_name': 'polytope',
+      'type': 'static_library',
+      'sources': [
+        #'polytope.h',
+      ],
+      'dependencies': [
+        '<(EXTERNALS):eigen',
+        '<(EXTERNALS):libcdd',
+      ],
+      'export_dependent_settings': [
+        '<(EXTERNALS):eigen',
+        '<(EXTERNALS):libcdd',
+      ],
+    },
+  ],
+}