From 33d9e2354a1734f5fcf14576905eae73106cf8b8 Mon Sep 17 00:00:00 2001
From: Andrey Kamaev <no@email>
Date: Sat, 16 Jun 2012 14:52:46 +0000
Subject: [PATCH] Fixed Android build with Eigen.

---
 modules/contrib/src/rgbdodometry.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/modules/contrib/src/rgbdodometry.cpp b/modules/contrib/src/rgbdodometry.cpp
index 81525f54f7..fcdd93620e 100644
--- a/modules/contrib/src/rgbdodometry.cpp
+++ b/modules/contrib/src/rgbdodometry.cpp
@@ -48,10 +48,12 @@
 #include <iostream>
 
 #if defined(HAVE_EIGEN) && EIGEN_WORLD_VERSION == 3
-#include <Eigen/Core>
-#include <unsupported/Eigen/MatrixFunctions>
-
-#include <Eigen/Dense>
+#  include <Eigen/Core>
+#  ifdef ANDROID
+     template <typename Scalar> Scalar log2(Scalar v) { using std::log; return log(v)/log(Scalar(2)); }
+#  endif
+#  include <unsupported/Eigen/MatrixFunctions>
+#  include <Eigen/Dense>
 #endif
 
 #include <limits>