[Qt-creator] optimization and file size between versions

[Ziller Eike]

On 27.09.2013, at 14:52, Duane <duane.hebert at group-upc.com> wrote:

> On 9/27/2013 8:21 AM, Orgad Shaneh wrote:
>> 
>> בתאריך 2013 9 27 15:15, מאת "Duane" <duane.hebert at group-upc.com
>> <mailto:duane.hebert at group-upc.com>>:
>>> 
>>> I have Qt Creator version 2.7.2 and am using Qt 4.8.4.  My colleague has
>>> Qt Creator version 2.4.1 and is using Qt 4.8.1.  We are both running the
>>> Fedora 16.  We use the same project file and this project doesn't use
>>> the Qt libs.
>>> 
>>> The .pro file has
>>> TEMPLATE = app
>>> CONFIG += console
>>> CONFIG -= qt
>>> 
>>> 
>>> When he builds he gets an executable 1.5Mb.  When I build, I get an
>>> executable of 10.6Mb  Both are release builds.  We both use the same
>> libs.
>>> 
>>> What can cause this?  How is optimization done here?  We build the same
>>> project for Windows in Visual Studio and the exe files are the same size
>>> but we've set the same optimization.
>>> 
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>>> Qt-creator at qt-project.org <mailto:Qt-creator at qt-project.org>
>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>> 
>> Can you paste the build output for both machines? A single file gcc
>> invocation and a single linker invocation should be enough (if the
>> project is not very complex).
>> 
> 
> 
> This would be quite a bit.  It's not a simple project.  But I have tried 
> a few things.  My Qt Creator SDK installation installed Qt 5.1.  So I 
> switched the kit to use this.  My build size goes from 10.6Mb to 8.6Mb. 
>  This was surprising.  So then I found my older version of Qt 4.8.1.  I 
> switched to that one and my file size becomes the same as my Colleague. 
>  1.5Mb.  So it's definitely the Qt version affecting this.  AFAIK these 
> versions were installed with Qt Toolkits and not build manually.  So I'm 
> not sure what the difference would be.  I would maybe understand this is 
> I was using any Qt libs but we're not for this application.  Make flags 
> look the same on the two systems.  I don't get it.


debug vs release build maybe?

-- 
Eike Ziller, Senior Software Engineer - Digia, Qt
 
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