[Qt-creator] optimization and file size between versions
Duane
duane.hebert at group-upc.com
Mon Sep 30 15:51:01 CEST 2013
On 9/29/2013 10:22 AM, Oleksii Serdiuk wrote:
> Hello Dane,
>
> Do you build Qt yourself? Prebuilt Qt binaries always default to release
> build (CONFIG+=release), unless you pass CONFIG+=debug to qmake.
> However, when you build Qt yourself, depending on configure options you
> specify, it can default to debug build (CONFIG+=debug) and you have to
> specify CONFIG+=release explicitly if you want to build in release mode.
> AFAIK, Qt Creator assumes that Qt defaults to release build so it
> doesn't explicitly pass CONFIG+=release to qmake.
>
I didn't build 4.8.4 myself. I don't remember if I installed it with
the SDK or via Fedora's add/remove. Probably the latter. For the Qt5
version, it was definitely part of the SDK install. It gets me an
executable of 8Mb. Smaller than the other but still much larger than
the 1.6Mb I can get with 4.8.1. I did just build a fresh copy of 4.8.1
and now I get the same size as my colleague.
I should probably manually build 4.8.4 or 4.8.5 and 5.2 but this build
took ~6 hours and I am short on time at the moment.
> On 27.09.2013 16:28, Duane wrote:
>> On 9/27/2013 10:18 AM, Duane wrote:
>>> On 9/27/2013 9:51 AM, Orgad Shaneh wrote:
>>>>
>>>> בתאריך 2013 9 27 16:49, מאת "Duane" <duane.hebert at group-upc.com
>>>> <mailto:duane.hebert at group-upc.com>>:
>>>> >
>>>> > On 9/27/2013 9:43 AM, Ziller Eike wrote:
>>>> > >
>>>> > > On 27.09.2013, at 14:52, Duane <duane.hebert at group-upc.com
>>>> <mailto: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>
>>>> > >>> <mailto: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.
>>>> > >>>>
>>>> > >>>> _______________________________________________
>>>> > >>>> Qt-creator mailing list
>>>> > >>>> Qt-creator at qt-project.org <mailto:Qt-creator at qt-project.org>
>>>> <mailto: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?
>>>> > >
>>>> >
>>>> > I started to say no, but then again when I switch from release
>>>> to debug
>>>> > the file size doesn't change. Something is broken here. But
>>>> when I
>>>> > switch to 4.8.1 things seem ok. I am currently building 4.8.5
>>>> to try
>>>> > that and see if it makes a difference.
>>>> >
>>>> > _______________________________________________
>>>> > Qt-creator mailing list
>>>> > Qt-creator at qt-project.org <mailto:Qt-creator at qt-project.org>
>>>> > http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>>
>>>> Try adding "QT=" to your project.
>>>>
>>>
>>>
>>> Didn't help. One thing that I do notice is that I don't see +=Release
>>> in the build string:
>>>
>>> 10:04:08: Starting: "/usr/bin/qmake-qt4"
>>> /home/duane/QtSDK/PT500Projects/visu32/visu32.pro -r -spec linux-g++
>>> 10:04:08: The process "/usr/bin/qmake-qt4" exited normally.
>>> 10:04:09: Starting: "/usr/bin/make"
>>> g++ -c -pipe -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
>>> -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom
>>> -fasynchronous-unwind-tables -O2 -Wall -W -Wno-write-strings
>>> -Wno-unused-parameter -Wno-unused-variable -DBPP32 -DPT470BUILD
>>> -I/usr/lib/qt4/mkspecs/linux-g++ -I../visu32
>>> -I../../../SVN_Repos/PT470Development/src/include
>>> -I../../../SVN_Repos/PT470Development/OpenGUI/src
>>> -I../../../SVN_Repos/PT470Development/OpenGUI/src -I../visu32 -I. -o
>>> main.o ../../../SVN_Repos/PT470Development/src/visu32/main.cpp
>>> ...
>>
>>
>>
>> When I build with 4.8.1 is see this:
>>
>> 10:20:09: Starting: "/home/duane/QtSDK/Desktop/Qt/4.8.1/gcc/bin/qmake"
>> /home/duane/QtSDK/PT500Projects/visu32/visu32.pro -r -spec linux-g++
>> CONFIG+=release
>> 10:20:09: The process "/home/duane/QtSDK/Desktop/Qt/4.8.1/gcc/bin/qmake"
>> exited normally.
>> 10:20:09: Starting: "/usr/bin/make" ...
>>
>>
>> The =+release is there.
>>
>>
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>> Qt-creator at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>
>
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