[Qt-interest] Building Qt for 64bits Windows

[Constantin Makshin]

Yes, initially Yves asked about compiling Qt, but after some time he said:
"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 ..."

That obviously means that he could compile Qt, but now has problems with
compiling applications that use it.

On Thu, 02 Jul 2009 03:33:40 +0400, Dario Ahdoot
<dario.ahdoot at image-metrics.com> wrote:
> Actually, the OP was about building Qt itself. In fact, look at the  
> subject of this email.
>
> -----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 3:21 PM
> To: Qt-interest
> Subject: Re: [Qt-interest] Building Qt for 64bits Windows
>
> 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