Index: /issm/trunk-jpl/externalpackages/zlib/install-1.2.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/zlib/install-1.2.sh	(revision 24423)
+++ /issm/trunk-jpl/externalpackages/zlib/install-1.2.sh	(revision 24423)
@@ -0,0 +1,38 @@
+#!/bin/bash
+set -eu
+
+
+# Constants
+#
+VER="1.2.11"
+
+# Download source
+$ISSM_DIR/scripts/DownloadExternalPackage.sh "https://issm.ess.uci.edu/files/externalpackages/zlib-${VER}.tar.gz" "zlib-${VER}.tar.gz"
+
+# Unpack source
+tar -zxvf zlib-$VER.tar.gz
+
+# Cleanup
+rm -rf install src
+mkdir install src
+
+# Move source to 'src' directory
+mv zlib-$VER/* src/
+rm -rf zlib-$VER
+
+# Configure
+cd src
+./configure \
+ 	--prefix="${ISSM_DIR}/externalpackages/zlib/install"
+
+# Compile and install
+if [ $# -eq 0 ]; then
+	make
+	make install
+else
+	make -j $1
+	make -j $1 install
+fi
+
+# Return to initial directory
+cd ..