Index: /issm/trunk-jpl/externalpackages/tk/install.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/tk/install.sh	(revision 12894)
+++ /issm/trunk-jpl/externalpackages/tk/install.sh	(revision 12894)
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+sudochoice=0;
+
+#Some cleanup
+rm -rf src
+rm -rf install
+rm -rf tk8.5.12
+mkdir src install
+
+#Download from ISSM server
+$ISSM_DIR/scripts/DownloadExternalPackage.py 'http://issm.jpl.nasa.gov/files/externalpackages/tk8.5.12-src.tar.gz' 'tk8.5.12.tar.gz'
+
+#Untar 
+tar -zxvf  tk8.5.12.tar.gz
+
+#Move tk into src directory
+mv tk8.5.12/* src
+rm -rf tk8.5.12
+
+cd src/unix
+
+#User mode: 
+if [[ $sudochoice == "0" ]]; 
+then 
+	./configure --prefix=$ISSM_DIR/externalpackages/tk/install
+	if [ -z $1 ]; then
+		make
+	else
+		make -j $1
+	fi
+	make install 
+fi
+
+#sudo mode: 
+if [[ $sudochoice == "1" ]]; 
+then
+	sudo ./configure 
+	if [ -z $1 ]; then
+		sudo make
+	else
+		sudo make -j $1
+	fi
+	sudo make install 
+fi