changing system definitions

[cjl@ai.mit.edu (Chris Lindblad)]

    Date: Tue, 13 Mar 90 13:35:20 EST
    From: rpg@cs.brown.edu


    Can anyone tell me what happens to previous versions of systems when I
    mung the sysdcl.lisp file for it?  My problem is that I want to alter
    a system by adding and deleting files from its declaration.  But I
    want to keep the old version around till I'm sure it works.  Is this a
    reasonable thing to do?  Do I have to keep the old sysdcl.lisp in
    place? (keeping old source files in place is a problem for us because
    we're short of lispm file space)

Yes, you should keep the old version of the sysdcl.lisp as well as the new
one.  System declaration files aren't compiled to .bin files, so the older
version of the sysdcl.lisp file is loaded when an older version of the system
is loaded.