GRASS (Geographic Resources Analysis Support System) is a free Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is an official project of the Open Source Geospatial Foundation. The following options may be enabled: mariadb for mariadb (or mysql) database support postgresql for postgresql database support (requires postgresql) sqlite for sqlite database support unixODBC for ODBC support (requires unixODBC) gmath for the GRASS gmath library (requires both blas and lapack) netcdf for netcdf export (requires netcdf) opencl for OpenCL GPU acceleration (requires opencl-headers, either nvidia-driver or amd-app-sdk, and suitable GPU hardware) The options you require must be specified by setting the variable ENABLE before running grass.SlackBuild, for example ENABLE="sqlite,netcdf" ./grass.SlackBuild ffmpeg is an optional runtime dependency for the Animation tool (g.gui.module). If you need to make grass libraries available to other applications (e.g. qgis) do this: echo /opt/grass/lib >> /etc/ld.so.conf && ldconfig