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Thread: where should I put qwt plugin on linux?

  1. 10th April 2012, 21:24 #1
    mark77
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    Default where should I put qwt plugin on linux?

    Hi,

    I am realtively new to qt and would like to install the qwt plugin into qt-creator that I have installed on linux. I'm using qt-creator 2.4 and qt 4.7, with qwt 6 installed.

    According to the website: http://doc.qt.nokia.com/qtcreator-2....g-plugins.html the plugins are looked for in the directory %SDK%\bin\designer but this directory does not exist on my install.
    So where am I supposed to put my libqwt_desinger_plugin.so file ?

    Thanks,

    Mark
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  2. 11th April 2012, 04:28 #2
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    d_stranz
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    Default Re: where should I put qwt plugin on linux?

    I hope you realize "%SDK%" is not meant to be taken literally. It is the path to wherever you have Qt installed. I don't know where the default is on linux, but you can probably figure it out.

    The path you gave is for the "integrated designer", whatever that is. You probably have a standalone designer installation, in which case the directory should be

    %SDK%\qt\plugins\designer
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  3. 11th April 2012, 07:00 #3
    Uwe
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    Default Re: where should I put qwt plugin on linux?

    On linux I recommend to use the packages offered by the distributor. The package maintainer take care for you, that everything works out of the box.

    But if you really need to install Qwt on your own read the INSTALL file: do a "make install" and configure your environment to load libraries and the plugin from where they have been installed.

    Uwe
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  4. 11th April 2012, 16:44 #4
    mark77
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    Default Re: where should I put qwt plugin on linux?

    Thanks d_stranz.

    Yes I am aware that it is not meant to be taken literally. According to the link I gave, that path is for designer integrated into qt-creator. Since I installed qt-creator (with designer integrated), that is the path I should be looking for. But there is no /bin directory in the qtSDK path.

    This is what's available if I search for "plugins" in the QtSDK directory:

    Qt Code: 
    1. QtSDK # find -iname plugins*
    2. ./QtCreator/lib/qtcreator/plugins
    3. ./QtCreator/bin/com/nokia/extras.1.1/plugins.qmltypes
    4. ./QtCreator/bin/com/nokia/symbian.1.1/plugins.qmltypes
    5. ./QtCreator/bin/Qt/labs/components.1.1/plugins.qmltypes
    6. ./QtCreator/bin/Qt/labs/components/native/plugins.qmltypes
    7. ./QtCreator/bin/Qt/labs/components/plugins.qmltypes
    8. ./Desktop/Qt/474/gcc/plugins
    9. ./Desktop/Qt/474/gcc/imports/com/nokia/extras.1.1/plugins.qmltypes
    10. ./Desktop/Qt/474/gcc/imports/com/nokia/meego/plugins.qmltypes
    11. ./Desktop/Qt/474/gcc/imports/com/nokia/symbian.1.1/plugins.qmltypes
    12. ./Desktop/Qt/474/gcc/imports/desktopHarmattan/com/nokia/extras.1.1/plugins.qmltypes
    13. ./Desktop/Qt/474/gcc/imports/Qt/labs/components.1.1/plugins.qmltypes
    14. ./Desktop/Qt/474/gcc/imports/Qt/labs/components/native/plugins.qmltypes
    15. ./Desktop/Qt/474/gcc/imports/Qt/labs/components/plugins.qmltypes
    16. ./Desktop/Qt/4.8.0/gcc/plugins
    17. ./Simulator/Application/plugins
    18. ./Simulator/Qt/gcc/plugins
    19. ./Simulator/Qt/gcc/imports/simulatorHarmattan/com/nokia/extras.1.1/plugins.qmltypes
    20. ./Simulator/Qt/gcc/imports/com/nokia/extras.1.1/plugins.qmltypes
    21. ./Simulator/Qt/gcc/imports/com/nokia/meego/plugins.qmltypes
    22. ./Simulator/Qt/gcc/imports/com/nokia/symbian.1.1/plugins.qmltypes
    23. ./Simulator/Qt/gcc/imports/com/nokia/OviNotifications/plugins.qmltypes
    24. ./Simulator/Qt/gcc/imports/Qt/labs/components.1.1/plugins.qmltypes
    25. ./Simulator/Qt/gcc/imports/Qt/labs/components/native/plugins.qmltypes
    26. ./Simulator/Qt/gcc/imports/Qt/labs/components/plugins.qmltypes
    27. ./Demos/4.7/mobile/quickhit/plugins
    28. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/share/perl/5.10.1/CPANPLUS/Shell/Default/Plugins
    29. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/share/pyshared/twisted/plugins
    30. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/obex/plugins
    31. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/python2.6/dist-packages/twisted/plugins
    32. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/bluetooth/plugins
    33. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/csd/plugins
    34. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/qt4/plugins
    35. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/qt4/imports/com/nokia/meego/plugins.qmltypes
    36. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/qt4/imports/com/nokia/extras/plugins.qmltypes
    37. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/qt4/imports/com/meego/plugins.qmltypes
    38. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/qt4/imports/com/meego/extras/plugins.qmltypes
    39. ./Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim/usr/lib/libproxy/0.2.3/plugins
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    The standalone path doesn't exist either.

    ------------------------------------------------------------------------------------------

    Hi Uwe,

    Are you just saying to install my distro's qwt package? I already did that...

    Mark
    Last edited by mark77; 11th April 2012 at 17:37.
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  5. 12th April 2012, 07:52 #5
    Uwe
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    Default Re: where should I put qwt plugin on linux?

    Quote Originally Posted by mark77 View Post
    Are you just saying to install my distro's qwt package? I already did that...
    Of course you also have to use the Qt packages of your distro - instead of installing the SDK manually !

    But when you really need to install Qwt yourself read the INSTALL file. It explains how to configure your environment, so that the plugin is loaded from where it is installed.

    Uwe
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  6. 12th April 2012, 16:13 #6
    mark77
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    Default Re: where should I put qwt plugin on linux?

    Thanks Uwe, I have installed qwt by following the instructions in the INSTALL file. However it does not seem to create a plugin for qt-creator/designer, because when I look under Help->About Plugins I find it is not listed. So I want to know the directory where qt-creator/designer expects plugins to appear, so I can check if it is there or not...
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  7. 12th April 2012, 18:20 #7
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    Default Re: where should I put qwt plugin on linux?

    ./QtCreator/lib/qtcreator/plugins
    Looks to me as though this would be the most logical place to put it. What else is in that directory? On my Windows installation of Qt 4.8, the Designer plugins are located in /plugins/designer under the Qt root directory. Things like arthurplugin, qwebview, qdeclarativeview, among others.

    I am not using QtCreator however. I use the qt-everywhere-opensource-src-4.8.0 distribution, and rebuild it all using the VC++ compiler.
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  8. 12th April 2012, 18:26 #8
    mark77
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    Default Re: where should I put qwt plugin on linux?

    Yeah, that's what I thought. I have:

    /opt/QtSDK/QtCreator/lib/qtcreator/plugins/designer

    In that directory (designer) there was only:

    libqwebview.so

    so I added:

    libqwt_designer_plugin.so

    But still, it doesn't load on starting qt-creator. Am I missing something?

    Cheers.
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  9. 12th April 2012, 19:54 #9
    Uwe
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    Default Re: where should I put qwt plugin on linux?

    In opposite to David I recommend not to copy the plugin: instead configure your environment to load the plugin from where it is installed by "make install".

    A) This step has to be done for both ways:

    Open a shell and enter the following command ( of course you have to replace the path by where you have installed the plugin ):

    Qt Code: 
    1. ldd  /usr/local/qwt-6.1.0-svn/plugins/designer/libqwt_designer_plugin.so
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    On my box it results to something like this:
    Qt Code: 
    1. linux-gate.so.1 =>  (0xffffe000)
    2. 	libqwt.so.6 => /home1/uwe/qwt/qwt/lib/libqwt.so.6 (0xb7586000)
    3. 	libQtXml.so.4 => /usr/local/Trolltech/Qt-4.8.0-debug/lib/libQtXml.so.4 (0xb7537000)
    4. 	libQtGui.so.4 => /usr/local/Trolltech/Qt-4.8.0-debug/lib/libQtGui.so.4 (0xb68b3000)
    5. 	libQtCore.so.4 => /usr/local/Trolltech/Qt-4.8.0-debug/lib/libQtCore.so.4 (0xb656a000)
    6. 	libQtDesigner.so.4 => /usr/local/Trolltech/Qt-4.8.0-debug/lib/libQtDesigner.so.4 (0xb5fbd000)
    7.         ...
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    When you see something like this:

    Qt Code: 
    1. linux-gate.so.1 =>  (0xffffe000)
    2. 	libqwt.so.6 => not found
    3.         ...
    To copy to clipboard, switch view to plain text mode 

    ... you have to read about ldconfig and LD_LIBRARY_PATH.

    B) Read about QT_PLUGIN_PATH: see http://doc.qt.nokia.com/4.7/deployment-plugins.html

    Of course all environment variables need to be set in the environment, where you start the creator - f.e start the creator from the same shell, where you have set them.

    HTH,
    Uwe
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  10. The following user says thank you to Uwe for this useful post:

    d_stranz (12th April 2012)
  11. 12th April 2012, 20:44 #10
    mark77
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    Default Re: where should I put qwt plugin on linux?

    Thankyou Uwe.

    I already have my library path pointing to the qwt library, so I do not get any such errors. Following the link you suggest I see one option to resolve this should be:

    Qt Code: 
    1. # QT_PLUGIN_PATH="/usr/local/qwt-6.0.2-svn/plugins/designer"
    2. # export QT_PLUGIN_PATH
    3. # echo $QT_PLUGIN_PATH
    4. /usr/local/qwt-6.0.2-svn/plugins/designer
    5. # qt
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    The last line is how I run qt-creator. It still doesn't see the plugin. I will look into other ways.
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  12. 13th April 2012, 07:35 #11
    Uwe
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    Default Re: where should I put qwt plugin on linux?

    What additional information do you get, when setting:

    Qt Code: 
    1. export QT_DEBUG_PLUGINS=1
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