o2scl

USE flags

• armadillo - Build matrix manipulation with sci-libs/armadillo
• debug - Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
• doc - Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
• eigen - Build matrix manipulation with dev-cpp/eigen
• examples - Install examples, usually source code
• fftw - Use FFTW library for computing Fourier transforms
• gsl - Use the GNU scientific library for calculations
• hdf5 - Add support for the Hierarchical Data Format v5
• openmp - Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
• readline - Enable support for libreadline, a GNU line-editing library that almost everyone wants
• static-libs - Build static versions of dynamic libraries as well