Configure on Ubuntu

Hostel

I'm using Fedora and I installed a Qt from repository by yum. In Ubuntu you can do similar. You should download from repository Qt and this should work(apt-get is an equivalent of yum).

mohsen

i already have Qt4.7.2 on my Ubuntu. I have to use 4.8.

sierdzio

Use Qt SDK.

If you really want to compile (or already had), maybe just the style is missing. Try running your app with "-style x" where x is, for example, cleanlooks. More info "HERE":http://developer.qt.nokia.com/doc/qt-4.7/qstyle.html.

mohsen

I couldn't configure with styles on linux. it seems they're only supported on windows.

Hostel

I'll try compile qt 4.8 on my Fedora and check the decoration of apps. Styles are in plugins - maybe you turn off plugins or your qt build doesn't support plugins?

lsatenstein

Hi everyone

My development platform is for Linux.

I share what I think is a common problem for Linux users. If I use QT on UBUNTU lts (10.4), supported until 2013, the qt-everywhere... crashes, with an x11) error (script location around line 5000). The error messages are not telling me what to do.

If I use the most current UBUNTU, and run the SDK, I found that it was best to do it with sudo, as the default location becomes set to /opt.

Please verify, but qmake was not part of the SDK (an oversight?). I subsequently installed qt-everywhere.... and did a sudo make install, followed by the export command for the path.
By putting both /bin outputs together, I believe that I am now able to proceed. I also moved qmake to the SDK's bin directory.

Compile on one system to test on another.

I have a business partner across the ocean. He is standardized on Debian. QT does not install on Debian, as I have setup a Debian distribution.

My view is that while developers and users assume a flawless installation, there are installation problems that may be driving away beginners like myself.

I still cannot compile for Debian, and give the executable to another Debian user who has a system at a different maintenance level.

Is there a preferred development platform as I find that one platform has qt3 modules and libraries, and another, qt4.3, or qt4.x and now we are looking at qt4.8. Is this a problem, when it will come time to export the executables?

Leslie in Montreal Canada

Hostel

On my linux with compiled Qt 4.8 a sample empty GUI app looks ok. I think that you have problem with plugins or a new Qt is mixed in run-time with old Qt. Try
@
ldd application
@
on app and look for libraries which app will load.
Also check this:
@
lsof | grep application | grep Qt
@
this will print a libraries which are loaded while a application is running.

I think that you have a conflict in system, or something is missing.

To compile an application with Qt 4.8 I configured a Qt Creator - nothing more.

portoist

I'v been also compiling Qt4.8 on Ubuntu and I'v got similar problem. If I creat new app with Hello World, font is wide and almost unreadable. I was able to make it better by running /opt/Trolltech/Qt4.8.0/bin/qtconfig and selecting different font. I'v been trying to load custom font for my app using QFontDatabase, but it doesn't seem to work:-/

miroslav

@lsatens
[quote author="lsatenstein" date="1321973375"]... I share what I think is a common problem for Linux users. If I use QT on UBUNTU lts (10.4), supported until 2013, the qt-everywhere... crashes, with an x11) error (script location around line 5000). The error messages are not telling me what to do.

...

Leslie in Montreal Canada

[/quote]

Leslie, I suggest to make that a separate topic titled "Qt on Ubuntu LTS/Debian" or something like that. People will be able to help you here.

mohsen

Thank you guys, The problem still exists. Does anybody configured Qt 4.8 on Ubuntu?