axpy matrix_vector matrix_matrix aat sci-libs/blas-reference-20120423 -O3 sci-libs/atlas-3.10.0 threads dev-cpp/eigen-3.1.1-r1 -O3 sci-libs/openblas-0.2.3 -O3 -O3 -openmp threads sci-libs/mkl-10.3.7.256 mkl32*