Step-by-step – Eigen C++ Installation in Ubuntu 20.04 Guide

Installing

2. 2. Downloading Eigen for Ubuntu

   Download Eigen for Ubuntu GNU/Linux

   Here Get Eigen .zip for Ubuntu

   Link to Download Eigen for Ubuntu

   If possible Select directly “Open with Archive Manager”!

3. 3. Extracting Eigen Archive

   Then Extract Eigen Zip into /tmp Directory
   If it does Not Open automatically then Double-Click on File Manager:

   
   Or from Command Line:

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   unzip -d /tmp ~/Downloads/Eigen*.zip

   You may need to Setup Unzip with:

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   sudo apt install unzip

4. 4. Installing Eigen

   First, Compile Source:

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   cd /tmp/eigen*

   So Make a Build Directory:

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   mkdir build

   Access the Target:

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   cd build

   And Build:

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   sudo apt install cmake

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   cmake ..

   Now to Make the Stuff:

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   make

   Finally, to Setup Eigen:

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   sudo make install