Qt 4.5.2 changes

Posted on 27 Jun 09 at 18:48 | Tagged as ,

This is basically a heads-up for Qt users on Gentoo. We are about to add the new 4.5.2 release to portage. With this release we have changed a few things. We no longer have certain useflags enabled by default that are already enabled by the desktop profile. This means that if you are not using the desktop profile, you should look if any useflags have changed and decide which ones you want to enable. Or otherwise, that you no longer need to disable them if you want a minimal install.

We also have removed the need for the libX11 dependency in qt-core and a couple of other non-gui modules. So you can now for example have a server-only install of quassel with minimal dependencies. The libX11 dependency is now only pulled by packages that really need it.

Another thing that changed is that we dropped the custom-cxxflags useflag. After a long period of testing we haven’t come across any problems with “advanced” cxxflags in Qt 4.5, so now we always let the Qt modules be built with the user-specified flags. As this is an eclass level change, this means also users of the stable branch will see this change. An emerge --newuse world will trigger a recompile of Qt, but this means you will get better optimizations.

4 comments

  1. franky on 27 Jun 09 at 19:30:

    Thank you very much for the information, the bump and especially all your hard work! :)

  2. RealNC on 27 Jun 09 at 19:41:

    Awesome work people! Thank you.

  3. James on 28 Jun 09 at 01:52:

    What does the dependency change for libx11 do for memory usage across the board?

  4. Mart Raudsepp on 30 Jun 09 at 09:36:

    I don’t think there’s any memory usage changes across the board if at the package level an unnecessary dependency atom is removed. QtCore was not linking against libX11 before, and now just the package itself reflects that properly, so you can have server installs of QtCore without having to have libX11 installed (which does NOT require Xorg either though).

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