Dear Florian,
please note, that CMake expects the variable CMAKE_MODULE_PATH not as an environment variable, but as a CMake variable. So, you could do something like
set(CMAKE_MODULE_PATH $ENV{CMAKE_MODULE_PATH})
before calling find_package(Eigen3)
But there are other ways, according to
Hello,
my CMake 3.6.2 complains about not finding FindEigen3.cmake
CMake Error at CMakeLists.txt:62 (find_package):
By not providing "FindEigen3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Eigen3", but
CMake did not find one.