Labplot master branch build failures

[Rik Mills]

Bisecting locally building with GCC6, culprit or 1st bad commit seems to be:

https://cgit.kde.org/labplot.git/commit/?id=d220081a978788c67ea99749c4c56176aaa2a7a1

On 13/06/17 09:41, Rik Mills wrote:
> Seems to fail with GCC 6, but succeeds with GCC 5.
> 
> Failures on GCC6:
> 
> artful http://kci.pangea.pub/job/artful_unstable_labplot/45/
> zesty http://kci.pangea.pub/job/zesty_unstable_labplot/52/
> 
> make[3]: *** [src/CMakeFiles/labplot2.dir/kdefrontend/GuiObserver.cpp.o]
> Error 1
> make[3]: *** Waiting for unfinished jobs....
> In file included from
> /<<BUILDDIR>>/labplot-2.4.0+p17.10+git20170613.0754/src/backend/spreadsheet/Spreadsheet.h:33:0,
>                  from
> /<<BUILDDIR>>/labplot-2.4.0+p17.10+git20170613.0754/src/kdefrontend/MainWin.cpp:36:
> /<<BUILDDIR>>/labplot-2.4.0+p17.10+git20170613.0754/src/backend/core/column/Column.h:
> In constructor ‘Column::ColumnStatistics::ColumnStatistics()’:
> /<<BUILDDIR>>/labplot-2.4.0+p17.10+git20170613.0754/src/backend/core/column/Column.h:46:15:
> error: ‘NAN’ was not declared in this scope
>      minimum = NAN;
>                ^~~
> src/CMakeFiles/labplot2.dir/build.make:372: recipe for target
> 'src/CMakeFiles/labplot2.dir/kdefrontend/MainWin.cpp.o' failed
> 
> Success on GCC 5:
> 
> xenial KCI http://kci.pangea.pub/job/xenial_unstable_labplot/55/
> 
> and for ref on other CI using GCC5
> 
> xenial NCI
> http://build.neon.kde.org/job/xenial_unstable_kde-extras_labplot/41/
> KDE CI https://build.kde.org/job/labplot%20master%20kf5-qt5/180/
>