[lto] Reader-writer compatibility?

[Frank Ch. Eigler]

Ryan Mansfield <rmansfield@qnx.com> writes:

> The objects were created with rev 151111 and being read using 151271.
> No, I can't reproduce the ICE using the same version.
> Thanks for confirming this is not expected to work.

Is it the intent that this work properly in the future?  It is not
absurd to imagine that someone with a treeful of .o files might suffer
an unexpected compiler upgrade before a later reuse/relink attempt.

- FChE