Challenge for real experts: why does cmake on CI not use automoc for a certain file?

[Ben Cooksley]

On Sat, Jun 6, 2015 at 10:07 PM, Alex Merry <alex.merry at kde.org> wrote:
> On Friday 05 June 2015 00:58:30 Friedrich W. H. Kossebau wrote:
>> you are a cmake and KDE buildsystem expert?
>> Prove that yourself and improve the world for others ;)
>
> Or, indeed, work towards becoming such an expert...
>
>>
>> Here is the challenge:
>>
>> https://build.kde.org/job/calligra%20frameworks%20kf5-qt5/PLATFORM=Linux,Var
>> iation=All,compiler=gcc/28/consoleText
>>
>> CMakeFiles/KisAsyncMergerTest.dir/kis_async_merger_test.cpp.o: In function
>> `KisAsyncMergerTest::KisAsyncMergerTest()':
>> /home/jenkins/builds/calligra/kf5-
>> qt5/krita/image/tests/kis_async_merger_test.h:24: undefined reference to
>> `vtable for KisAsyncMergerTest'
>> CMakeFiles/KisAsyncMergerTest.dir/kis_async_merger_test.cpp.o: In function
>> `KisAsyncMergerTest::~KisAsyncMergerTest()':
>> /home/jenkins/builds/calligra/kf5-
>> qt5/krita/image/tests/kis_async_merger_test.h:24: undefined reference to
>> `vtable for KisAsyncMergerTest'
>> collect2: error: ld returned 1 exit status
>> krita/image/tests/CMakeFiles/KisAsyncMergerTest.dir/build.make:89: recipe
>> for target 'krita/image/tests/KisAsyncMergerTest' failed
>>
>> Right, you say, smells like automoc not run. And indeed it is not run. So
>> far you are an expert.
>>
>> But why?
>> Why does cmake on CI not want to run automoc on
>> kis_async_merger_test.{h,cpp}?
>>
>> Locally it works fine for anyone (cmake 3.0.1/3.0.2), noone yet was able to
>> reproduce the problem, instead everyone sees:
>
> So my first question is: what version of cmake is being run on the build
> servers? If it's not 3.0.1 or 3.0.2, then that could explain why you can't
> reproduce it locally.

The CI system is using "cmake version 3.1.3" on Ubuntu Vivid (15.04).
Not sure if that makes a difference.

>
> Alex

Thanks,
Ben

>
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