[Qt-interest] Building Qt for 64bits Windows

[Constantin Makshin]

Yves said he's compiled Qt and now wants to compile applications that use
it. So I was talking about compiling applications, not Qt itself, from
within the Visual Studio IDE.

On Thu, 02 Jul 2009 02:02:48 +0400, Dario Ahdoot
<dario.ahdoot at image-metrics.com> wrote:
> This is tricker than it seems initially if you are on a 32-bit machine  
> and trying to cross compile. This is because the compiler will first  
> create moc, uic, and rcc as 64-bit executables, which won't run on your  
> 32-bit machine, meaning you won't be able to build the rest of the Qt  
> libs. I haven't found a way arounds this. The only way I can think of is  
> to build those three, halt build, copy them out into some temp folder  
> and copy the 32 bit versions you may already have built back in, build  
> the rest of Qt, then copy the 64-bit versions back in. I haven't tried  
> this, but it seems like an ugly and time consuming hack.
>
> I posted about this on here before and read through the archives but  
> wasn't able to get a sufficient answer. If somebody has one, I would  
> love to hear it.
>
> D
>
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com  
> [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Constantin  
> Makshin
> Sent: Wednesday, July 01, 2009 12:34 PM
> To: Qt-interest
> Subject: Re: [Qt-interest] Building Qt for 64bits Windows
>
> Visual Studio IDE compiles for Win32 platform by default. Create "x64"
> platform for your project and try to compile again.
>
> On Wed, 01 Jul 2009 16:25:59 +0400, Yves Bailly <yves.bailly at sescoi.fr>
> wrote:
>> Matthieu Dazy wrote:
>>> Yves Bailly wrote:
>>>> Just a pair of questions about 64bits on Windows and Qt 4.5.2.
>>>> 1) In the "mkspecs", I only see "win32-*" folders... are they suitable
>>>>    for building Qt using Visual 2008 64bits compiler? If so, how to
>>>>    specifie I want to use the 64bits compiler instead of the default
>>>>    32bits compiler?
>>>
>>> Yes, the win32 mkspecs are the correct ones.
>>>
>>> Assuming you're using Visual Studio, in order to use the 64-bit
>>> compiler, just run path_to_visual_studio\vc\bin\amd64\vcvarsamd64.bat
>>> instead of path_to_visual_studio\vc\bin\vcvars32.bat when setting up  
>>> the
>>> compiler environment and tools.
>>
>> Thanks Matthieu.
>>
>> After some testing, it seems Qt is build in 64bits mode... but when I
>> load
>> a project file in Visual Studio (e.g.
>> examples/tutorials/adressbook/part1/
>> part1.vcproj), it complains when linking with QtGui4.lib , saying  
>> "module
>> machine 'x64' conflicts with target machine type 'X86'".
>>
>> So if I understand correctly, it seems the *.vcproj project files are  
>> not
>> created correctly, or at least they do not contain the needed  
>> information
>> to build/link for 64bits target.
>>
>> Or am I missing something?
>>
>> Regards,

-- 
Constantin "Dinosaur" Makshin