idlwave-auto-routine-info-updates

idlwave-auto-routine-info-updates is a variable defined in `idlwave.el'.
Its value is

(find-file save-buffer kill-buffer compile-buffer)

Documentation:
Controls under what circumstances routine info is updated automatically.
Possible values:
nil Never
t All available
(...) A list of circumstances. Allowed members are:
find-file Add info for new IDLWAVE buffers.
save-buffer Update buffer info when buffer is saved
kill-buffer Remove buffer info when buffer gets killed
compile-buffer Update shell info after `idlwave-shell-save-and...'

You can customize this variable.