Qt5 cmake stuff

[David Faure]

On Monday 14 May 2012 18:10:19 David Faure wrote:
> Hi (Steve),
> 
> It seems that updating Qt5 to the latest master broke my
> kdelibs-frameworks-qt5 build?
> 
> CMake Error at
> /d/qt/5/qtbase-master/lib/cmake/Qt5Core/Qt5CoreConfig.cmake:60
> (add_library): add_library cannot create imported target "Qt5::Core"
> because another target with the same name already exists.
> Call Stack (most recent call first):
>  
> /d/kde/inst/kde_frameworks-qt5/share/ECM-0.0.4/find-modules/FindQt5Transiti
> onal.cmake:2 (find_package) tier1/itemmodels/CMakeLists.txt:19
> (find_package)
> 
> (and many more such errors about duplicate targets)
> 
> Unfortunately cmake doesn't say *where* it saw the target the first time, so
> I have no clue how to debug this.

Actually it seems to happen both times in the same file.
It's trying to prevent calling add_library(Qt5::Core SHARED IMPORTED) twice,
but the mechanism to prevent that is not working...

Qt5CoreConfig.cmake says:

get_property(_qt5CoreTargetExists DIRECTORY PROPERTY _Qt5Core_target)
if (NOT _qt5CoreTargetExists)
    set_property(DIRECTORY PROPERTY _Qt5Core_target TRUE)
    message(STATUS "DF: Qt5CoreConfig.cmake add_library(Qt5::Core SHARED IMPORTED)")
    add_library(Qt5::Core SHARED IMPORTED)
endif()

but the output from make says
[...]
-- DF: Qt5CoreConfig.cmake add_library(Qt5::Core SHARED IMPORTED)
[...]
-- DF: Qt5CoreConfig.cmake add_library(Qt5::Core SHARED IMPORTED)
[...]

so clearly this "directory property" stuff isn't working.

Steve, Alex: help ;-)

Which directory is this supposed to be about?


David, quite stuck at the moment with a qt4 build not working (test_signal.moc not created)
and a qt5 build not working (due to the above)...

-- 
David Faure, faure at kde.org, http://www.davidfaure.fr
Sponsored by Nokia to work on KDE, incl. KDE Frameworks 5