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+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 optional dependencies may be enabled:
+ blas, lapack for the GRASS gmath library
+ ffmpeg for the GRASS ogsf library and nviz animation
+ mysql for mysql (or mariadb) database support
+ postgresql for postgresql database support
+ sqlite for sqlite database support
+
+The options you require must be specified by setting the variable ENABLE
+before running grass.SlackBuild, for example
+
+ ENABLE="sqlite,ffmpeg" ./grass.SlackBuild
+
+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