id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13021	Odeint: Eigen upgrade to v 3.3.3 breaks compatibility	speku.gmt@…	karsten	"In order to combine odeint with the Eigen library I use, among other things, 
#include ""boost/numeric/odeint/external/eigen/eigen.hpp""

This used to work perfectly with Eigen version 3.2 , but fails after an upgrade of the Eigen libraries to  version 3.3.3. The code does not compile, generating a large amount of error messages, beginning with:
{{{
In file included from /usr/include/boost/numeric/odeint/external/eigen/eigen.hpp:22:0,
                 from minimal.cpp:3:
/usr/include/boost/numeric/odeint/external/eigen/eigen_algebra.hpp:35:37: error: ‘scalar_add_op’ in namespace ‘Eigen::internal’ does not name a template type
(...) 
}}}
A minimal reproducible example is:
{{{
#include <Eigen/Dense>
#include <boost/numeric/odeint.hpp>
#include ""boost/numeric/odeint/external/eigen/eigen.hpp""
int main() {}
}}}
This code does not compile with Eigen 3.3.3. The only functioning workaround I found was downgrading to Eigen 3.3.2.

I noticed the problem while using Boost version 1.58.0, ubuntu 16.04, g++ version 5.4.0.
Upgraded to Boost version 1.64.0; to no avail. The error messages differ after the Boost upgrade but the problem persists.
"	Bugs	new	To Be Determined	odeint	Boost 1.64.0	Problem		odeint eigen include