sci-libs/flann
Fast approximate nearest neighbor searches in high dimensional spaces
USE Flags
cuda
Global: Build CUDA binaries.
doc
Global: Adds extra documentation (API, Javadoc, etc)
examples
Global: Install examples, usually source code
mpi
Global: Adds MPI (Message Passing Interface) layer to the apps that support it
octave
Global: Enable octave support
openmp
Global: Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"