Find the answer to your Linux question:
Results 1 to 5 of 5
Hello everybody, I would like to make an upgrade Qt, from Qt3 to Qt4 (For some exercises with cross-platform programming). However, (1) I have seen on the site of Qt, ...
Enjoy an ad free experience by logging in. Not a member yet? Register.
  1. #1
    Just Joined!
    Join Date
    Jan 2007
    Location
    Germany
    Posts
    73

    Will KDE survive after Qt3-->Qt4 upgrade ???


    Hello everybody,

    I would like to make an upgrade Qt, from Qt3 to Qt4 (For some exercises with cross-platform programming).
    However,
    (1) I have seen on the site of Qt, that in general Qt4 is NOT compatible with Qt3
    (2) On the site of KDE is claimed that it needs Qt version >=3.2, but < 4.
    I have KDE already installed (version 3.5.1, OS.: SuSe 10.1)
    My question is
    Will KDE survive after an upgrade Qt3-->Qt4 ???
    Will it be possible to compile and install KDE applications after this ?

    Thanks in advance,
    Xaleandr

  2. #2
    Linux Enthusiast gruven's Avatar
    Join Date
    Dec 2004
    Location
    Arkansas
    Posts
    541
    KDE 4 will be released sometime soon, and it uses QT4, so to answer your question, yes.

    Linux User #376741
    Code is Poetry

  3. #3
    Just Joined!
    Join Date
    Jan 2007
    Location
    Germany
    Posts
    73
    Thank You very much for your prompt reply,
    but my question was slightly different :
    Provided I upgrade Qt3 to Qt4, will it be still possible to compile and install KDE-based applications using current version of Qt, Qt3 ! (e.g. from http://kde-apps.org) on my laptop ?

    The problem is the following:
    I have created some applications with Qt3 Designer, they compiled without any problem under Linux. But when I tried to re-compile them with Qt4 [MinGW] under Windows, I got numerous complaints that the files were created with too old version of Qt and cannot be compiled, since Qt3 and Qt4 are incompatible. It took me several hours to translate them to Qt4 and re-compile. That is why I wonder if it is possible to install Qt4 under Linux and how dangerous this is.

  4. $spacer_open
    $spacer_close
  5. #4
    Linux Enthusiast gruven's Avatar
    Join Date
    Dec 2004
    Location
    Arkansas
    Posts
    541
    Qt3 and Qt4 can co-exist on the same system. On my gentoo system (replaced by debian, but that is another story) I had both qt's installed because some programs used Qt4 and kde still uses Qt3. As long as the programs can distinguish between the libs and find them, it shouldn't be a problem.

    Linux User #376741
    Code is Poetry

  6. #5
    Just Joined!
    Join Date
    Jan 2007
    Location
    Germany
    Posts
    73
    Thank You very much for your replies,
    I will try to install it tonight

    Xaleandr

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •