how to run Qt programs on non qt machine ?

**gri** · 24th January 2007, 10:40

The gif extension for Qt is not being compiled by default. To enable it you have to add "--qt-gif" to your configure commandline.

**aamer4yu** · 24th January 2007, 11:00

how do i do that ?? can u explain ?
thx

**gri** · 24th January 2007, 11:11

How did you compile your Qt version if you don't know how to configure it?

With gcc:

Qt Code:

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$QTDIR/configure.exe --qt-gif
make

$QTDIR/configure.exe --qt-gif
make

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With Visual Studio (OpenSource version with QtWin patch)

Qt Code:

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qconfigure.bat <compiler> --qt-gif
nmake

qconfigure.bat <compiler> --qt-gif
nmake

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**aamer4yu** · 24th January 2007, 11:26

ya i had compiled my Qt with the QtWin patch from here.

with the parameter qconfigure.bat msvc2005
and i had read that by default static version are built...

will i have to rebuild Qt with static option to enable importing the plugins ??
Note : On my machine I have no problem running the program, its when I have to run the program on my friends machine, I get the plugin problem

I feel like a kid when it comes to makefiles and static/dynamic builds... i nver bothered to dig deep in it, just use the IDE's. Is there any link to know how to build dynamic/static programs, what are the various options, etc ??

And what option should i keep for jpg and bmp formats ??

Thx for ur help... and hope u can give some more time to me

**gri** · 24th January 2007, 11:37

You have to rebuild the libraries. If you want to use a static Qt version, you'll have to type "qconfigure.bat msvc2005 --qt-gif -static". Otherwise without "-static" (maybe "--static").

If your program links on your computer but no images can be shown on your friends machine you probably forgot to deliver the "plugins/imageformats" dlls to him. You should read Deploying Qt Applications for that.

If it does not load the imageformats like you want you have to call "QCoreApplication::addLibraryPath()" and set the path where the imageformats are.

**aamer4yu** · 24th January 2007, 11:44

is ther a way to check if my build is a static one or not ?? and what image formats are supported ?
and also does it have the plugins required ??

in here it is written that

Take note of any options that you are interested in. Note that by default, static and debug versions of the library are built - this is usually the appropriate choice for most developers.

rebuilding Qt takes a lot of time... so wanna avoid it..

I will try the solutions u gave...i guess i have problem with deploying, bec on my machine, when i run the program, i am able to load the images and edit them..

Thx again

**gri** · 24th January 2007, 11:58

Originally Posted by aamer4yu

is ther a way to check if my build is a static one or not ?? and what image formats are supported ?
and also does it have the plugins required ??

You can check that. If you have a QtCore4.dll in $QTDIR/bin it seems to be a dynamic linked version. The supported imageformats depend on which one you have built. The normal Qt distribution supports JPEG, PNG, SVG and GIF (reading, which is disabled by default).

Yes, rebuilding takes a little bit of your time. But you don't do that every day so take the time and configure your environment like you need it. Compiling whole Qt takes about 40 minutes to one hour on my computer.

**aamer4yu** · 25th January 2007, 04:36

thanks...

is there some boook or site from where I can learn these building things ?? till now I have been using IDE's and not much bothereed whats going on at the back...

it wud be nice if I get some link to read from.. all this static/dynamic building, deploying... understanding how .lib and .dll work... how to use .lib , .dll with static and dynamic build..etc...

thx

**gri** · 25th January 2007, 08:10

I don't know a book, maybe someone else ...

For me Qt's .pro files are self-explanatory and if I miss something, qmake's documentation (also available in the assistant) helps.
Building itself is like on every make based system, not much commands. "make --help" could help you. Also "qconfigure --help" may help you to see with which options you could build Qt.

**nguahoang205** · 11th July 2012, 03:03

Hi everyone,

I am a new Qt programmer
I have a Qt application, I build and run on my machine (Qt installed) is OK, but I copy it to other machine non installed Qt, it do not run.
I need to know this method very much. Can anyone help me?

Thanks.
nguahoang