Bug#639290: partial upgrade from squeeze to wheezy fails

[Jonathan Nieder <jrnieder@gmail.com>]

Adam Heath wrote:

> Well, fixing this in apt won't be good enough, as that version won't
> be made available in stable.

Of course.  But it's still an apt bug, seriously.

As for the case at hand: the more I think about it, the less the
Breaks by libc6 makes sense.  In the motivating example Bug#629670,
as far as I can tell it is libc6-dev that broke perl:

	Note (probably harmless): No library found for -lpthread

Of course that problem isn't libc6-dev-specific --- any development
library installed to /usr/lib/$arch instead of /usr/lib could trigger
the same problem.  It is possible (except on armhf and i386) to use
libc/squeeze with gcc/wheezy as a multiarch development environment
and completely avoid that Breaks.

So maybe the Breaks should be from gcc, if from anywhere.  Niko,
what do you think?

Jonathan