System for Automated Geoscientific Analyses (SAGA) is a Geographic Information System software with immense capabilities for geodata processing and analysis. SAGA supports the implementation of new functions with an effective API. Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA's Graphical User Interface or various scripting environments (shell scripts, Python, R and so on). SAGA can use these optional autodetected dependencies enabled if they are found in the system: libharu, OpenMP, OpenCV, qhull, vigra, pdal, postgresql/postgis, libLAS, proj, hdf5. WARNINGS: 1) Unlike earlier versions of SAGA, the build of last versions requires wxGTK3 => 3.1 that is not available in Slackbuilds.org at the moment. If you want to build this version of SAGA you have to install the package wxWidgets (also available in Slackbuilds.org). If you have both wxGTK3 and wxWidgets installed in your system, make sure that wxWidgets is installed after wxGTK. 2) SAGA requires an ODBC driver in the system. It works both with iODBC (installed with the libiodbc package (included in Slackware 15.0) and unixODBC (installed from the SBo's slackbuild). The build first searches for unixODBC then for iODBC. 3) unixODBC is a required dependency in 32 bit systems since the libiodbc headers cause a build failure during the compilation. 4) Support to vigra is disabled because it conflicts with HDF5 if this is found in the system. The behavior without HDF5 is not tested. 5) Support to OpenCV is disabled in -current because the build fails if OpenCV version is greater than 4.5.5.