Qt4 minimal subset

Qt4 minimal subset

[Patrick]

Dear mailinglist,

I am working with yocto 1.1.1, poky 6.0.1. Until now I have build an 
embedded systems without display. Now I would like to add support for a 
small screen with Qt.

I have added to my image the qt4-x11-free recipes. This include so many 
things that I don't need as I am building an embedded system: Demos, 
example, docs, dev tools, ...

Which recipes could I use to include a working subset of Qt with X11 
that include only base libraries and eventually some additional elements.

Thanks in advance for your help !

Patrick

Re: Qt4 minimal subset

[Paul Eggleton]

On Tuesday 10 April 2012 17:36:17 Patrick wrote:
> I am working with yocto 1.1.1, poky 6.0.1. Until now I have build an
> embedded systems without display. Now I would like to add support for a
> small screen with Qt.
> 
> I have added to my image the qt4-x11-free recipes. This include so many
> things that I don't need as I am building an embedded system: Demos,
> example, docs, dev tools, ...
> 
> Which recipes could I use to include a working subset of Qt with X11
> that include only base libraries and eventually some additional elements.

When we package Qt, it is split into a number of packages for individual 
components; however if you install the qt4-x11-free *package* in your image, 
this pulls in everything. What you probably want to do is have a look at the 
packages it does produce and only include those that you need in your image 
rather than the qt4-x11-free package.

One way to get a list of the packages produced is to look in tmp/work/*/qt4-
x11-free*/packages-split/.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Qt4 minimal subset

[Patrick]

On 04/10/2012 05:43 PM, Paul Eggleton wrote:
> On Tuesday 10 April 2012 17:36:17 Patrick wrote:
>> I am working with yocto 1.1.1, poky 6.0.1. Until now I have build an
>> embedded systems without display. Now I would like to add support for a
>> small screen with Qt.
>>
>> I have added to my image the qt4-x11-free recipes. This include so many
>> things that I don't need as I am building an embedded system: Demos,
>> example, docs, dev tools, ...
>>
>> Which recipes could I use to include a working subset of Qt with X11
>> that include only base libraries and eventually some additional elements.
>
> When we package Qt, it is split into a number of packages for individual
> components; however if you install the qt4-x11-free *package* in your image,
> this pulls in everything. What you probably want to do is have a look at the
> packages it does produce and only include those that you need in your image
> rather than the qt4-x11-free package.
>
> One way to get a list of the packages produced is to look in tmp/work/*/qt4-
> x11-free*/packages-split/.
>
> Cheers,
> Paul
>

Thanks Paul for your quick answers.

I was wondering if a "meta" package like qt4-x11-free was available with 
a smaller subset, including the most used package of Qt.

On aditional question; is it possible to build Qt with directFB instead 
X11 ? If yes how should I do ?

Thanks again for your help

Patrick

Re: Qt4 minimal subset

[Paul Eggleton]

On Tuesday 10 April 2012 17:56:06 Patrick wrote:
> I was wondering if a "meta" package like qt4-x11-free was available with
> a smaller subset, including the most used package of Qt.

Well, "most used" is somewhat subjective - it depends on what you're doing. We 
don't have any smaller package group for Qt - perhaps we should look at adding 
some additional package groupings in future though.

> On aditional question; is it possible to build Qt with directFB instead
> X11 ? If yes how should I do ?

Yes, to do this, bitbake qt4-embedded instead of qt4-x11-free. Your 
application recipes (if you have any) should "inherit qt4e" rather than 
"inherit qt4x11" in this case, as the library names are different.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Qt4 minimal subset

[Patrick]

On 04/10/2012 06:05 PM, Paul Eggleton wrote:
> On Tuesday 10 April 2012 17:56:06 Patrick wrote:
>> I was wondering if a "meta" package like qt4-x11-free was available with
>> a smaller subset, including the most used package of Qt.
>
> Well, "most used" is somewhat subjective - it depends on what you're doing. We
> don't have any smaller package group for Qt - perhaps we should look at adding
> some additional package groupings in future though.
>
>> On aditional question; is it possible to build Qt with directFB instead
>> X11 ? If yes how should I do ?
>
> Yes, to do this, bitbake qt4-embedded instead of qt4-x11-free. Your
> application recipes (if you have any) should "inherit qt4e" rather than
> "inherit qt4x11" in this case, as the library names are different.
>
> Cheers,
> Paul
>

Thanks again for your answer. I have rebuild qt with DirectFB using 
qt4-embedded. I could start a Qt application on my board using QWS (test 
-qws). Is that right to start DirectFB or should I use another way ?
I just would like to be sure that DirectFB is used and not simply the 
Linux framebuffer.

Thanks for your help

Patrick

Re: Qt4 minimal subset

[Paul Eggleton]

On Wednesday 11 April 2012 09:52:38 Patrick wrote:
> Thanks again for your answer. I have rebuild qt with DirectFB using
> qt4-embedded. I could start a Qt application on my board using QWS (test
> -qws). Is that right to start DirectFB or should I use another way ?
> I just would like to be sure that DirectFB is used and not simply the
> Linux framebuffer.

At this point I'd have to refer you to the Qt documentation, particularly the 
first link:

http://qt-project.org/doc/qt-4.8/qt-embedded-displaymanagement.html
http://qt-project.org/doc/qt-4.8/qt-embeddedlinux-directfb.html

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Qt4 minimal subset

[Patrick]

On 04/11/2012 11:08 AM, Paul Eggleton wrote:
> On Wednesday 11 April 2012 09:52:38 Patrick wrote:
>> Thanks again for your answer. I have rebuild qt with DirectFB using
>> qt4-embedded. I could start a Qt application on my board using QWS (test
>> -qws). Is that right to start DirectFB or should I use another way ?
>> I just would like to be sure that DirectFB is used and not simply the
>> Linux framebuffer.
>
> At this point I'd have to refer you to the Qt documentation, particularly the
> first link:
>
> http://qt-project.org/doc/qt-4.8/qt-embedded-displaymanagement.html
> http://qt-project.org/doc/qt-4.8/qt-embeddedlinux-directfb.html
>
> Cheers,
> Paul
>

One more question about Qt with poky;

Qt embedded work now on my target and I could easily compile some 
application based on it using bitbake.

I would like now to add the possibility to compile Qt based application 
from the "SDK". I have added the different -dev version of Qt to the 
"SDK" but qmake is missing. How could I add a working "cross" version of 
qmake ?

Thanks in advance for your help

Patrick

Re: Qt4 minimal subset

[Patrick]

On 04/12/2012 02:04 PM, Patrick wrote:
> On 04/11/2012 11:08 AM, Paul Eggleton wrote:
>> On Wednesday 11 April 2012 09:52:38 Patrick wrote:
>>> Thanks again for your answer. I have rebuild qt with DirectFB using
>>> qt4-embedded. I could start a Qt application on my board using QWS (test
>>> -qws). Is that right to start DirectFB or should I use another way ?
>>> I just would like to be sure that DirectFB is used and not simply the
>>> Linux framebuffer.
>>
>> At this point I'd have to refer you to the Qt documentation,
>> particularly the
>> first link:
>>
>> http://qt-project.org/doc/qt-4.8/qt-embedded-displaymanagement.html
>> http://qt-project.org/doc/qt-4.8/qt-embeddedlinux-directfb.html
>>
>> Cheers,
>> Paul
>>
>
> One more question about Qt with poky;
>
> Qt embedded work now on my target and I could easily compile some
> application based on it using bitbake.
>
> I would like now to add the possibility to compile Qt based application
> from the "SDK". I have added the different -dev version of Qt to the
> "SDK" but qmake is missing. How could I add a working "cross" version of
> qmake ?
>
> Thanks in advance for your help
>
> Patrick
> _______________________________________________
> poky mailing list
> poky@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/poky

Ok I have found that I have to use the meta-toolchain-qte recipe.

Patrick