Ich bin ein bisschen verzweifelt: Für mein Studium muss ich mit Eigen und CMake arbeiten. Ich kann Eigen verwenden, wenn ich die gesamte Bibliothek in die Verzeichnisse kopiere, in denen mein Compiler standardmäßig aussieht, aber sobald ich versuche, sie über @ zu finde
find_package(Eigen3 REQUIRED)
Ich erhalte den folgenden Fehler:

CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
  Could NOT find Eigen3 (missing: EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)
  (Required is at least version "2.91.0")
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
  FindEigen3.cmake:76 (find_package_handle_standard_args)
  CMakeLists.txt:8 (find_package)<p></p>

-- Configuring incomplete, errors occurred!



Now I searched for solutions but all I those I tried (also those available on stackoverflow: 

Find package Eigen3 for CMake 
or 
CMake Can't find Eigen3 )
did not work.
My Eigen Version (according to the Macros in Core/util/Macros.h) is 3.2.5.
I keep the Eigen directory in /usr/local/include, I use the FindEigen3.cmake which comes with the Eigen library and my CMakeLists.txt looks as follows: 



cmake_minimum_required(VERSION 2.8)
project(Test)

set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
find_package(Eigen3 REQUIRED)
include_directories(${EIGEN3_INCLUDE_DIR})
message("Found Eigen3 in: ${EIGEN3_INCLUDE_DIR}")

add_executable(main test.cpp)


Has anyone an idea what's going wrong?

Kind regards,
Julien