Bug#818832: marble: FTBFS with libc 2.23: 'isnan' was not declared in this scope

[Martin Michlmayr <tbm@hpe.com>]

Package: marble
Version: 4:15.08.3-1.1
Severity: important
User: debian-glibc@lists.debian.org
Usertags: 2.23

This package fails to build with libc6 2.23 (2.23-0experimental0 from
experimental).

> sbuild (Debian sbuild) 0.68.0 (15 Jan 2016) on dl580gen9-02.hlinux
...
> Scanning dependencies of target marblethumbnail
> make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
> make -f src/thumbnailer/CMakeFiles/marblethumbnail.dir/build.make src/thumbnailer/CMakeFiles/marblethumbnail.dir/build
> /<<PKGBUILDDIR>>/src/plugins/positionprovider/gpsd/GpsdPositionProviderPlugin.cpp: In member function 'void Marble::GpsdPositionProviderPlugin::update(gps_data_t)':
> /<<PKGBUILDDIR>>/src/plugins/positionprovider/gpsd/GpsdPositionProviderPlugin.cpp:79:68: error: 'isnan' was not declared in this scope
>      if ( data.status == STATUS_NO_FIX || isnan( data.fix.longitude ) || isnan( data.fix.latitude ) )
>                                                                     ^

-- 
Martin Michlmayr
Linux for HPE Helion, Hewlett Packard Enterprise