On Sat, Jun 28, 2008 at 4:57 PM, mabshoff <[EMAIL PROTECTED]> wrote: > > > > On Jun 28, 4:45 pm, Jason Grout <[EMAIL PROTECTED]> wrote: > > mabshoff wrote: > > > On Jun 28, 2:10 pm, Carl Witty <[EMAIL PROTECTED]> wrote: > > <SNIP> > > > What is the policy on breaking backward compatibility of pickling at > > major releases (e.g., 4.0)? > > I would consider it unacceptable to break backward compatibility for > pickles unless there is a really good reason to do so. It is likely > that as some classes get deprecated pickling support for them will > also have to be removed, but we should be better than say Maple where > upgrades of minor versions regularly seems to massively break code.
Sorry, I obviously meant to write *major* versions. Cheers, Michael > > Since we now have a deprecation framework in place and are slowly > hashing out the policy associated with it we should also come up with > some agreed upon rules for pickling deprecation. > > Since VMWare images should work for the foreseeable future it might be > a good idea to keep at least some of them around so that people can > just download older releases and run them instantly. Compiling older > releases of Sage with current compilers is problematic, i.e. it seem > that no (not even the current release 3.0.3) builds with OpenSuSE 11 > since they are shipping a gcc 4.3.1cvs snapshot that identifies itself > as gcc 4.3. So imagine in three years from now when you have to run > Sage 2.10.2 for some reason with you current distribution. You can > build some VMWare image with an older Linux distribution that Sage > 2.10.2 supports and then build Sage 2.10.2, but that seems like a > major inconvenience. > > > Jason > > Cheers, > > Michael > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
