+option(ENABLE_FGVIEWER "Set to ON to build the fgviewer application (default)" ON)
+option(ENABLE_GPSSMOOTH "Set to ON to build the GPSsmooth application (default)" ON)
+option(ENABLE_TERRASYNC "Set to ON to build the terrasync application (default)" ON)
+
+option(ENABLE_FGJS "Set to ON to build the fgjs application (default)" ON)
+option(ENABLE_JS_DEMO "Set to ON to build the js_demo application (default)" ON)
+
+option(ENABLE_METAR "Set to ON to build the metar application (default)" ON)
+