How to update libeigen3 to version >= 3.3 on 16.04 xenial?

Question

Issue:

I have libeigen3 from the official repo installed:

$ sudo apt-get install libeigen3-dev 
[sudo] password for nicolas: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libeigen3-dev is already the newest version (3.3~beta1-2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

it says it's a 3.3 version, as this command does:

$ dpkg -s libeigen3-dev | grep 'Version'
Version: 3.3~beta1-2

However, version in file /usr/lib/cmake/eigen3/Eigen3Config.cmake is set to:

set ( EIGEN3_VERSION_STRING "3.2.92" )

Question:

I wonder why? And how could I fix that because I need at least Eigen3.3 for to build an other software.

Solution

1. Try "apt-pinning" of the package libeigen3-dev from another newer Ubuntu version or
2. do it manually by downloading the deb-file from https://packages.ubuntu.com/bionic/libeigen3-dev (by clicking on "all" that directs to https://packages.ubuntu.com/bionic/all/libeigen3-dev/download) and then install it by sudo dpkg -i libeigen3-dev_3.3.4-4_all.deb (or whatever version you have downloaded). It should work flawless since there are not difficult dependencies.

Comments

[damadam]

if there isn't problem to say it, can you precise which software you want to build?

[s.k]

it's FOSS so there is no problem: github.com/alicevision/AliceVision.git

[tardis]

Often the beta versions are named this way in a lot of software: Add a high minor version like "92" that shows that 3.2.92 is near to 3.3.0