ros2 install catkin

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Hi, I am using Ubuntu 18.04 and ros eloquent I am trying to install catkind. First I tried with sudo apt-get install ros-eloquent-catkin however it looks that ros eloquent does not have a catkin package to install as it uses ament instead so I then followed the next tutorial: https://index.ros.org/doc/ros2/Tutori... It has a chapter called "Variation: Using the catkin API in a ROS 2 package" where tells you how to install catkin for ros2 as follows:

# install catkin_pkg
git clone https://github.com/ros-infrastructure/catkin_pkg.git
cd catkin_pkg
git checkout ament
python3 setup.py install --prefix $HOME/catkin --single-version-externally-managed --record foo --install-layout deb
# install catkin
git clone https://github.com/ros/catkin.git
cd catkin
git checkout ament
mkdir build
cd build
PYTHONPATH=$HOME/catkin/lib/python3/dist-packages/ cmake .. -DCMAKE_INSTALL_PREFIX=$HOME/catkin -DPYTHON_EXECUTABLE=/usr/bin/python3
make install

However after following all the steps with succes when it comes to the last command "make install" it comes out with the following error:

CMake Error at gtest/cmake_install.cmake:47 (file): file INSTALL cannot find "/home/cpsr/catkin_pkg/catkin/build/gtest/libgtest.so". Call Stack (most recent call first): cmake_install.cmake:159 (include)

Makefile:94: recipe for target 'install' failed make: * [install] Error 1

Any clue or any help? Thanks for your time