Add a FIXME

src/samplefunctional.hh

@@ -147,6 +147,8 @@ void minimise(const Functional J, const typename Functional::SmallVector x,
   MyNonlinearityType phi = J.phi;
   typedef DirectionalConvexFunction<MyNonlinearityType>
   MyDirectionalConvexFunctionType;
+  // FIXME: We cannot pass J.phi directly because the constructor
+  // does not allow for constant arguments
   MyDirectionalConvexFunctionType JRest(JRestA, JRestb, phi, x, descDir);
   // }}}