[maemo-developers] Non-experimental QT versioning in Autobuilder (was: QT Packages, Repositories and PR1.2)

[From: Javier S. Pedro]

Attila Csipa wrote:

> A single #ifdef can break such a setup, and
> these things might not be apparent at first (as some of the changes
> involve property names and values, so might even compile with the wrong
> version, but will simply not work as desired - the most common case
> exhibiting this problem IMO being finger scrolling, for example).

You mean a #define being X in 4.5 and Y in 4.6, with X != Y? This is probably
the cause for the missing guarantees in current Maemo Qt versions ABI
compatibility.

As for runtime stuff (for ex. a flag that does nothing in 4.5 but is
implemented in 4.6) packager would need to add forced depedencies on 4.6 if
he does not want 4.5 users to install the package (much like the current
problem I have with certain hildon-desktop atoms only implemented in
PR1.1/PR1.2 but the package being marked as PR1.0 compatible
by autobuilder -- because of course atom names are not symbols).

Javier.