Over-zealous getting rid of Eigen...

CMakeLists.txt

@@ -31,9 +31,9 @@ include_directories("${CMAKE_CURRENT_SOURCE_DIR}/boost_teqp")
 #set(EIGEN_BUILD_DOC FALSE CACHE BOOL "Turn off Eigen snippets in their docs")
 #set(EIGEN_TEST_NOQT TRUE CACHE BOOL "Turn off Eigen tests of Qt")
 #set(BUILD_TESTING FALSE CACHE BOOL "Turn off Eigen tests")
-#set(Eigen3_DIR "${CMAKE_CURRENT_SOURCE_DIR}/externals/Eigen" CACHE INTERNAL "Path to Eigen, for autodiff")
 # add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/externals/Eigen")
 
+set(Eigen3_DIR "${CMAKE_CURRENT_SOURCE_DIR}/externals/Eigen" CACHE INTERNAL "Path to Eigen, for autodiff")
 set(AUTODIFF_BUILD_TESTS FALSE CACHE BOOL "No autodiff tests")
 set(AUTODIFF_BUILD_PYTHON FALSE CACHE BOOL "No autodiff python")
 set(AUTODIFF_BUILD_EXAMPLES FALSE CACHE BOOL "No autodiff examples")