CMFD Acceleration

To use the CMFD acceleration, users need to install LAPACK and armadillo.

1. Make sure you have LAPACK. If not, install it use your package manager. For instance, in Gentoo, run

emerge -av lapack

2. Install armadillo with support for LAPACK. In Gentoo, one way to do it would be adding the following line in your /etc/portage/package.use:

sci-libs/armadillo lapack

Then build your armadillo regularly,

emerge -av armadillo

Make sure that armadillo is built with lapack, so you should expect something like the following in Gentoo:

[ebuild R ] sci-libs/armadillo-3.0.2 USE="lapack* -atlas -blas -doc" 0 kB

If somehow LAPACK is not installed or armadillo is built without LAPACK, you would most likely see an error message like the following when you run OpenMOC:

error: solve(): use of ATLAS or LAPACK needs to be enabled

terminate called after throwing an instance of 'std::logic_error' what():
Aborted