Regression in CMake breaking builds

[Alexander Neundorf]

On Sunday 15 September 2013, Ben Cooksley wrote:
> On Sun, Sep 15, 2013 at 10:52 PM, Alexander Neundorf <neundorf at kde.org> 
wrote:
> > On Sunday 15 September 2013, Ben Cooksley wrote:
> >> Hi all,
> >> 
> >> It appears that a recent update to CMake on build.kde.org has broken a
> >> number of KDE projects, resulting in them now failing to build.
> >> 
> >> An example can be found here:
> >> http://build.kde.org/view/FAILED/job/kdevplatform_master/560/consoleText
> >> 
> >> The following projects appear to be affected at this time:
> >> - Calligra
> >> - KDevPlatform
> >> - Amarok
> >> 
> >> CMake folks, can you please take a look?
> >> The CMake build is http://build.kde.org/view/All/job/cmake/78/
> > 
> > This is cmake next ?
> > Does 2.8.12rc3 work ?
> 
> Yes, it is cmake next.
> I've no idea if 2.8.12rc3 works, but the previously built revision did
> work - that was 719bc22a69cccaba7a6d788cb98b68925e798f76.

Can you try 2.8.12.rc3 ?
I guess if nothing bad happens, this will be 2.8.12 final.
 
> > It looks like it is related to using imported targets in try_compile():
> > 
> > -- Enabling c++0x support for unordered map
> > 
> > CMake Error at cmTryCompileExec236800853Targets.cmake:96 (add_library):
> >   add_library cannot create imported target "Qt4::QtGui" because another
> >   target with the same name already exists.
> > 
> > Call Stack (most recent call first):
> >   CMakeLists.txt:11 (include)
> 
> I see. Does that mean it should be affecting all builds, as it only
> seems to be affecting some builds at the moment?

I guess Steve knows more.

Alex