You may help yourself by setting some default GNV specific variable values in a hints/vms.sh file (which should be OK to add to perl source since it cannot interfere with the operation of configure.com the DCL procedure).
Check to be sure that osname='vms' or something similar is set in the config.sh script that Configure writes out. Adjust so that hints/$osname.sh is the name of your hints file. Peter Prymmer