No subject

contemporary distros would it make any sense at all to perhaps maintain=20
backward compatibility for some small window of time? eg: if in early 2009=20
qt 4.5 is commonly used by the KDE distro's then for all of 2010 paraview=20
supports at a minimum qt4.5.

If it were just for developers I'd say no, but since anyone who wants to=20
take advantage of parallel pv has to compile. this type of thing has=20
potential to affect a bunch of users as well.


Utkarsh Ayachit wrote:
Folks,

As we are approaching 3.8 branch, what does everyone think of making
Qt 4.6 the officially supported version? Quite a few of us have been
using Qt 4.6 for quite some time now and don't think there are any
issues.

Utkarsh
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=20

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<br><font size=3D2 face=3D"sans-serif">Hi,</font>
<br>
<br><font size=3D2 face=3D"sans-serif">I think that we have to be carefull
: with the branding refactoring making it easy to build applications on
top of ParaView components, and the PV_INSTALL_DEVELOPMENT options, ParaView
should now be considered more like an SDK than a stand-alone application.</=
font>
<br>
<br><font size=3D2 face=3D"sans-serif">As more and more applications are bu=
ilt
on top of PV, changing the version of Qt will impact all those applications,
you should then have a clear policy regarding those versions, and give
a advanced warning of any changed to come.</font>
<br>
<br><font size=3D2 face=3D"sans-serif">Some possible policy would be : </fo=
nt>
<br><font size=3D2 face=3D"sans-serif">at each release of a new stable vers=
ion
of Qt, PV will support both the new and the old versions for 1 year, and
drop the previous version after that </font>
<br><font size=3D2 face=3D"sans-serif">or</font>
<br><font size=3D2 face=3D"sans-serif">each stable version of ParaView will
support both the lastest stable version of Qt and the previous one</font>
<br>
<br><font size=3D2 face=3D"sans-serif">or whatever, but please make it a pu=
blic
policy so that we know what to expect.</font>
<br>
<br><font size=3D2 face=3D"sans-serif">Best</font>
<br><font size=3D2 face=3D"sans-serif">Stephane<br>
</font>
<br>
<br>
<br>
<table width=3D100%>
<tr valign=3Dtop>
<td width=3D40%><font size=3D1 face=3D"sans-serif"><b>berk.geveci at kitware.c=
om</b>
</font>
<br><font size=3D1 face=3D"sans-serif">Envoy=E9 par : paraview-developers-b=
ounces at paraview.org</font>
<p><font size=3D1 face=3D"sans-serif">07/02/2010 21:48</font>
<td width=3D59%>
<table width=3D100%>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">A</font></div>
<td><font size=3D1 face=3D"sans-serif">burlen.loring at gmail.com</font>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">cc</font></div>
<td><font size=3D1 face=3D"sans-serif">paraview-developers at paraview.org</fo=
nt>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">Objet</font></div>
<td><font size=3D1 face=3D"sans-serif">Re: [Paraview-developers] Requiring
Qt 4.6 for ParaView 3.8</font></table>
<br>
<table>
<tr valign=3Dtop>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=3D3>I wouldn't object to supporting 4.5 and 4.6. I think set=
ting
up 1-2 dashboards to verify building with 4.5 would be enough. We don't
run into Qt specific bugs too often anyway. I defer to Utkarsh though.<br>
<br>
Also, if there is an attractive feature on the latest version of Qt that
will make our lives much easier, we are likely to move to it and not support
the previous version. So, I don't want to have an official rule about suppo=
rting
more than 1 version.<br>
<br>
-berk<br>
<br>
</font>
<br><font size=3D3>On Sun, Feb 7, 2010 at 3:08 PM, burlen &lt;</font><a hre=
f=3Dmailto:burlen.loring at gmail.com><font size=3D3 color=3Dblue><u>burlen.lo=
ring at gmail.com</u></font></a><font size=3D3>&gt;
wrote:</font>
<br><font size=3D3>Will this mean that PV won't build with any thing less
than Qt 4.6?<br>
I wonder if it would make sense to have a small range of supported versions
rather than a single one?<br>
<br>
It's currently the case that with qt anything less than 4.5 pv fails to
compile (even if you remove the version test in cmakelists) because pv
uses some qt classes that were only added to 4.5. In my opinion it would
be a burden to pv users to get too far ahead of the various KDE supported
distro's packages. eg. Kubuntu 9.10 reports qt version 4.5.2. KUbuntu 8.04.4
LTS reports qt version 4.3.4.<br>
<br>