pass to eigen3 ;)

bench/btl/libs/eigen2/CMakeLists.txt

diff --git a/bench/btl/libs/eigen2/CMakeLists.txt b/bench/btl/libs/eigen2/CMakeLists.txt
index 2d2f74e..eb1659b 100644
--- a/bench/btl/libs/eigen2/CMakeLists.txt
+++ b/bench/btl/libs/eigen2/CMakeLists.txt
@@ -1,8 +1,8 @@
 
-find_package(Eigen2)
-if (EIGEN2_FOUND)
+find_package(Eigen)
+if (EIGEN_FOUND)
 
-  include_directories(${EIGEN2_INCLUDE_DIR})
+  include_directories(${EIGEN_INCLUDE_DIR})
   btl_add_bench(btl_eigen3_linear main_linear.cpp)
   btl_add_bench(btl_eigen3_vecmat main_vecmat.cpp)
   btl_add_bench(btl_eigen3_matmat main_matmat.cpp)
@@ -54,4 +54,4 @@
     endif(BUILD_btl_tiny_eigen3_novec)
   endif(NOT BTL_NOVEC)
 
-endif (EIGEN2_FOUND)
+endif (EIGEN_FOUND)