[Qt-creator] optimization and file size between versions

[Duane]

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>
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>
> 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.