[Qt5-feedback] Real 64 Bit support ?

[Thiago Macieira]

On Thursday, 12 de May de 2011 10:41:38 mailings at novaimages.de wrote:
> Hi
>  
> i just wanted to ask if for Qt5 a real 64 bit support is planned ?

Qt has supported real 64-bit environments for well over 6 years. Even Qt 3 
supported them.

> With real support i mean
> -> Libraries/dlls with _64 or similar extension

That's up to whomever builds the libraries. All Linux distributions build Qt 
in 64-bit mode for their 64-bit flavours.

Renaming the libraries to achieve that is not a good idea. The library path 
changes instead.

> -> QtCreator 64 bit development support

Used daily by many developers. There's nothing to be done here.

> -> prebuild libraries for 64 bit.

That's an SDK question. We already ship 64-bit builds for Linux and Mac OS X. 
And we should start building in 64-bit mode for Windows too, I agree.

> I know that many people think 64 bit is useless for standard applications,
> but that is for most things i do not true.
> Even if i hack myself a tool to analyze large chunks of data 64 bit would be
> a real timesaver.

I think you forgot to mention "Windows" somewhere in your email up to here. 
What you say may be relevant for Windows, but it's definitely not generic.

> Currently i create my own qt builds for 64 bits on windows and unix but i am
> not so happy about custom builds of qt leading to a possible fragmentation
> (and some real problems if i look an the qt usage in autodesk maya that
> prohibits us from using a newer version of qt).

I think it's useful to have a standard build people can rely on, but there's 
nothing we can do to prevent any user of Qt from patching it and shipping 
that. So it's really Autodesk's choice whether they want to do it.

> By the way a qt4 full 64 bit support would be appreciated also :)

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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