Index: /issm/trunk-jpl/etc/environment.csh
===================================================================
--- /issm/trunk-jpl/etc/environment.csh	(revision 12414)
+++ /issm/trunk-jpl/etc/environment.csh	(revision 12415)
@@ -127,2 +127,6 @@
 setenv VALGRIND_DIR {$VALGRIND_DIR}
 setenv PATH {$PATH}:{$VALGRIND_DIR}
+
+#GSL
+setenv GSL_DIR {$GSL_DIR}
+setenv LD_LIBRARY_PATH {$LD_LIBRARY_PATH}:{$GSL_DIR}/lib
Index: /issm/trunk-jpl/etc/environment_variables.csh
===================================================================
--- /issm/trunk-jpl/etc/environment_variables.csh	(revision 12414)
+++ /issm/trunk-jpl/etc/environment_variables.csh	(revision 12415)
@@ -83,2 +83,5 @@
 #valgrind
 set VALGRIND_DIR={$ISSM_DIR}/externalpackages/valgrind/install/bin
+
+#gsl
+set GSL_DIR={$ISSM_DIR}/externalpackages/gsl/install