What is the canonical way of configuring a Tcl installation for site specific purposes? I think its a well known problem: You are using a Tcl-installation which is installed from the system supplier (e.g. a Linux distro). Tcl/Tk an the libs provided are installed under /usr/lib, thus limiting the search path to /usr/lib/ and descendants. These directories will be requrely wiped out during a system upgrade. Beside this part of the installation you maintain another set of libs and packages specific for this site (so normally under /usr/local/lib). For that reason the search path has to be extended. What is the best way to manage this across updates?
What is your opinion?