Eric Niebler wrote:
On 7/21/2010 5:00 PM, Robert Ramey wrote:
as far as I could see, the changes should be small and perhaps trivial since MPI doesn't have support previous versions.
That sentence doesn't parse. I think you're missing a "to" in there. MPI doesn't have "to" support previous versions, presumably because the serialized forms are only traveling across a wire and are never persisted to disk. Is that right? Matthias, is that assumption correct.
correct:MPI doesn't support previous versions because it doesn't have to.
Based upon your messages, it's not clear to me what this "fix" does.
It makes binary archives distinguishable from their incompatible pre-1.42 variants. It provides a standalone utility to help users fix their broken binary archives from 1.42 and 1.43. It requires users that inherit from a binary archive to manually fix their code.
(does/does not?) help users identify these places in their code.
There's no problem in user's code. The problem is that version 1.42 and 1.43 have the same archive version # in the header as 1.41 even though they have different file formats.
Does it make it so that serialization in 1.44 will be able to read binary archives from 1.41
Yes(?)
This has never been an issue. The problem reading binary archives created with versions 1.42 and 1.43.
or does it make it so that serialization in 1.44 will be able to read binary archives from 1.42/43?
No.
YES !!!
Or somehow both? Is there a trac issue?
No(?)
no. Robert Ramey