[Pkg-kde-extras] Bug#811735: k3b: FTBFS with GCC 6: narrowing conversion

[Martin Michlmayr]

Package: k3b
Version: 2.0.3a-1
Severity: important
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-6 gcc-6-narrowing

This package fails to build with GCC 6.  GCC 6 has not been released
yet, but it's expected that GCC 6 will become the default compiler for
stretch.

Note that only the first error is reported; there might be more.  You
can find a snapshot of GCC 6 in experimental.  To build with GCC 6,
you can set CC=gcc-6 CXX=g++-6 explicitly.

You may be able to find out more about this issue at
https://gcc.gnu.org/gcc-6/changes.html

> sbuild (Debian sbuild) 0.67.0 (26 Dec 2015) on dl580gen9-02.hlinux
...
> cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b && /usr/bin/c++   -DKDE4_CMAKE_TOPLEVEL_DIR_LENGTH=17 -DKDE_DEPRECATED_WARNINGS -DMAKE_K3B_LIB -DQT3_SUPPORT -DQT3_SUPPORT_WARNINGS -DQT_NO_CAST_TO_ASCII -DQT_NO_STL -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_REENTRANT -D_XOPEN_SOURCE=500 -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b -I/<<PKGBUILDDIR>>/libk3b -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu -I/<<PKGBUILDDIR>>/libk3bdevice -I/<<PKGBUILDDIR>>/libk3b/core -I/<<PKGBUILDDIR>>/libk3b/plugin -I/<<PKGBUILDDIR>>/libk3b/tools -I/<<PKGBUILDDIR>>/libk3b/tools/qprocess -I/<<PKGBUILDDIR>>/libk3b/tools/qprocess/private -I/<<PKGBUILDDIR>>/libk3b/projects -I/<<PKGBUILDDIR>>/libk3b/projects/audiocd -I/<<PKGBUILDDIR>>/libk3b/projects/datacd -I/<<PKGBUILDDIR>>/libk3b/projects/videocd -I/<<PKGBUILDDIR>>/libk3b/projects/mixedcd -I/<<PKGBUILDDIR>>/libk3b/jobs -I/<<PKGBUILDDIR>>/libk3b/videodvd -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b/core -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b/plugin -I
> /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b/tools -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b/projects -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/libk3b/jobs -I/usr/include/KDE -I/usr/include/qt4/phonon -I/usr/include/qt4/QtXmlPatterns -I/usr/include/qt4/QtXml -I/usr/include/qt4/QtWebKit -I/usr/include/qt4/QtUiTools -I/usr/include/qt4/QtTest -I/usr/include/qt4/QtSvg -I/usr/include/qt4/QtSql -I/usr/include/qt4/QtScriptTools -I/usr/include/qt4/QtScript -I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtHelp -I/usr/include/qt4/QtDesigner -I/usr/include/qt4/QtDeclarative -I/usr/include/qt4/QtDBus -I/usr/include/qt4/Qt3Support -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -I/usr/include/qt4/Qt -I/usr/share/qt4/mkspecs/default -I/usr/include/qt4  -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -Wnon-virtual-dtor -Wno-long-long -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common -Woverloaded-virtual -fPIC   -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -o CMakeFiles/k3b.dir/tools/k3bmultichoicedialog.cpp.o -c /<<PKGBUILDDIR>>/libk3b/tools/k3bmultichoicedialog.cpp
> Generating k3baudiotrackview.moc
> /<<PKGBUILDDIR>>/libk3b/tools/k3blistview.cpp:498:2: warning: #warning FIXME: draw check mark [-Wcpp]
>  #warning FIXME: draw check mark
>   ^~~~~~~
> 
> Generating k3bdatafileview.moc
> Generating k3baudiocdview.moc
> Generating k3bdataviewimpl.moc
> Generating k3bwidgetshoweffect.moc
> /<<PKGBUILDDIR>>/libk3b/tools/k3bwavefilewriter.cpp: In member function 'void K3b::WaveFileWriter::writeEmptyHeader()':
> /<<PKGBUILDDIR>>/libk3b/tools/k3bwavefilewriter.cpp:125:9: error: narrowing conversion of '172' from 'int' to 'char' inside { } [-Wnarrowing]
>          };
>          ^
> 
> /<<PKGBUILDDIR>>/libk3b/tools/k3bwavefilewriter.cpp:125:9: error: narrowing conversion of '177' from 'int' to 'char' inside { } [-Wnarrowing]
> libk3b/CMakeFiles/k3b.dir/build.make:353: recipe for target 'libk3b/CMakeFiles/k3b.dir/tools/k3bwavefilewriter.cpp.o' failed
> make[3]: *** [libk3b/CMakeFiles/k3b.dir/tools/k3bwavefilewriter.cpp.o] Error 1
> make[3]: *** Waiting for unfinished jobs....
> Generating k3bmixedburndialog.moc

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