error in catkin build couldn't find package "numpy_eigen" - c++

Question

The first comments led me through until I reached the error below
NEW ERROR AFTER running sudo apt install libeigen3-dev
CMake Error at rpg_emvs/mapper_emvs/CMakeLists.txt:16 (find_package):
By not providing "FindEigen.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Eigen", but
CMake did not find one.
Could not find a package configuration file provided by "Eigen" with any of
the following names:
EigenConfig.cmake
eigen-config.cmake
Add the installation prefix of "Eigen" to CMAKE_PREFIX_PATH or set
"Eigen_DIR" to a directory containing one of the above files. If "Eigen"
provides a separate development package or SDK, be sure it has been
installed.
This is the Cmakelists.txt file
project(mapper_emvs)
cmake_minimum_required(VERSION 2.8.3)
find_package(catkin_simple REQUIRED)
catkin_simple(ALL_DEPS_REQUIRED)
find_package(Eigen REQUIRED)
find_package(Boost REQUIRED system filesystem date_time thread)
#Setting include, lib directories and definitions
include_directories(${${Boost_INCLUDE_DIR} ${EIGEN_INCLUDE_DIRS}})
should I try commenting the eigen add package part ?
NEW ERROR After updating CMAKE file
/home/ubuntu/emvs_ws/src/numpy_eigen/include/numpy_eigen/boost_python_headers.hpp:23:22: fatal error: Eigen/Core: No such file or directory
compilation terminated.
ERROR after building numpy_eigen alone
-- verifying file...
file='/home/ubuntu/emvs_ws/build/eigen_catkin/eigen_src-prefix/src/3.3.4.tar.bz2'
-- MD5 hash of
/home/ubuntu/emvs_ws/build/eigen_catkin/eigen_src-prefix/src/3.3.4.tar.bz2
does not match expected value
expected: 'a7aab9f758249b86c93221ad417fbe18'
actual: 'd41d8cd98f00b204e9800998ecf8427e'
-- File already exists but hash mismatch. Removing...
-- Downloading...
dst='/home/ubuntu/emvs_ws/build/eigen_catkin/eigen_src-prefix/src/3.3.4.tar.bz2'
timeout='none'
-- Using src='http://bitbucket.org/eigen/eigen/get/3.3.4.tar.bz2'
[ 13%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/test_float.cpp.o
[ 13%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/numpy_eigen_test_module.cpp.o
[ 18%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/test_double.cpp.o
[ 22%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/test_uchar.cpp.o
[ 27%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/test_int.cpp.o
[ 31%] Building CXX object numpy_eigen/CMakeFiles/numpy_eigen_test.dir/src/autogen_test_module/test_long.cpp.o
/home/ubuntu/emvs_ws/src/numpy_eigen/src/autogen_test_module/test_uchar.cpp:1:22: fatal error: Eigen/Core: No such file or directory
compilation terminated.
/home/ubuntu/emvs_ws/src/numpy_eigen/src/autogen_test_module/test_float.cpp:1:22: fatal error: Eigen/Core: No such file or directory
compilation terminated.

Answer 1

You can download and keep inside /home/ubuntu/emvs_ws/src(assume this is your ros workspace) folder and compile with other packages which need numpy_eigen.
cd /home/ubuntu/emvs_ws/src
git clone https://github.com/ethz-asl/numpy_eigen.git
cd ../
catkin_make
I guess it's better to use catkin_make instead of catkin build, something those packages getting strange errors with catkin build. Also, if this package depends on catkin_simple, if you don't have catkin_simple, clone that repo into src and try executing catkin_make.