I followed this tutorial for preparing KDE 4 for development.

For some reason when I run cmakekde in the kdebase directory, when its starts building the plasma packages it fails and returns an error(s).

Error 1:

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/home/kde-devel/kde/src/KDE/kdebase/workspace/plasma/shells/desktop/backgrounddialog.cpp: In member function ‘void ThemeModel::reload()’:                 
/home/kde-devel/kde/src/KDE/kdebase/workspace/plasma/shells/desktop/backgrounddialog.cpp:80: error: ‘listThemeInfo’ is not a member of ‘Plasma::Theme’   
/home/kde-devel/kde/src/KDE/kdebase/workspace/plasma/shells/desktop/backgrounddialog.cpp:89: error: no matching function for call to ‘Plasma::Theme::Theme(QString, ThemeModel* const)’                                               
/home/kde-devel/kde/include/KDE/Plasma/../../plasma/theme.h:83: note: candidates are: Plasma::Theme::Theme(QObject*)                                     
/home/kde-devel/kde/include/KDE/Plasma/../../plasma/theme.h:56: note:                 Plasma::Theme::Theme(const Plasma::Theme&)                         
/home/kde-devel/kde/src/KDE/kdebase/workspace/plasma/shells/desktop/backgrounddialog.cpp:92: error: ‘class Plasma::FrameSvg’ has no member named ‘setTheme’                                                                           
make[2]: *** [workspace/plasma/shells/desktop/CMakeFiles/kdeinit_plasma-desktop.dir/backgrounddialog.o] Error 1   

Error 2:

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/home/kde-devel/kde/src/KDE/kdebase/workspace/kcontrol/randr/ktimerdialog.cpp: In member function ‘void KTimerDialog::slotInternalTimeout()’:
/home/kde-devel/kde/src/KDE/kdebase/workspace/kcontrol/randr/ktimerdialog.cpp:173: warning: enumeration value ‘Reset’ not handled in switch


And finally:

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Linking CXX executable krandrtray
[ 63%] Built target krandrtray
make: *** [all] Error 2


Furthermore, each time a run cmakekde it progresses slightly and produces a different error (I think).

Thanks in advance.

Have you installed KDE Libs from trunk?

Yes. I have installed kdelibs, kdepimlibs and kdesupport from trunk.

Have you set the following environment variables?

KDEDIR to the compiled KDE installation prefix ( -DCMAKE_INSTALL_PREFIX argument in cmake configuration command )
CMAKE_PREFIX_PATH to KDEDIR
LD_LIBRARY_PATH to KDEDIR/libs
PATH to KDEDIR/bin:PATH

Example:

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KDEDIR=/opt/trunk-kde/kde
PATH=/opt/trunk-kde/kde/bin:/opt/trunk-kde/qt/bin:/usr/lib/mpi/gcc/openmpi/bin:/home/trunk/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/games:/opt/kde3/bin:/usr/lib/mit/bin:/usr/lib/mit/sbin:/usr/NX/bin
CMAKE_PREFIX_PATH=/opt/trunk-kde/kde:/opt/trunk-kde/qt
LD_LIBRARY_PATH=/opt/trunk-kde/kde/lib:/opt/trunk-kde/qt/lib

I set those environment variables and it still produced the same error.

It also produces this error:

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CMake Warning at /home/kde-devel/kde/share/apps/cmake/modules/KDE4Macros.cmake:569 (add_library):
    Cannot generate a safe runtime search path for target kded_phononserver
    because files in some  directories may conflict with libraries in implicit
    directories:

       runtime library [libphonon.so.4] in /usr/lib may be hidden by files in:
          /home/kde-devel/kde/lib

    Some of these libraries may not be found correctly.
Call Stack (most recent call first):
   runtime/phonon/kded-module/CMakeLists.txt:31 (kde4_add_plugin)


There are many other errors almost exactly the same to this but as I cannot copy directly from XTerm it would take too long to type them all out.

Can you please try cleaning the KDE Base build system, setting those variables and trying again?

I uninstalled all the KDE packages and followed the tutorial on the openSUSE website and it worked. Can't think what went wrong the first time though.