Qt5 switching qreal from float to double on arm*

[Philipp Kern]

On Thu, Nov 07, 2013 at 02:46:27PM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:
> - If we decide to do the change in Qt5, it will be *without* soname bump. Yes, 
> I know many of you will think of this as **ugly**, but so far means 3 binNMUs 
> per arch. Now if this is not acceptable, then no change will be made, because 
> I won't change Qt5's SONAME.

What is your plan to support partial upgrades? BinNMUs can require new Qt
versions to be installed, but Qt can be upgraded independently to the newer
version, causing the rdepends to crash. This can potentially be solved by
Breaks, but it still breaks assumptions of people using Debian in that such
ABI breaks will be communicated through SONAME bumps. And the old lib will
not even be coinstallable.

(Of course a good time to do such changes are in fact SONAME bumps, but I
realize that this won't happen for Qt for quite some time.)

Kind regards
Philipp Kern
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