Limit the number of build jobs to 8 and link jobs to 4 for PowerPC. This should help reduce the OOM build problems.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.