Bug#811757: teeworlds: FTBFS with GCC 6: narrowing conversion

[Martin Michlmayr]

Package: teeworlds
Version: 0.6.2+dfsg-2
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
...
> [ 49/139] #1 c++ src/mastersrv/mastersrv.cpp
> g++ -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -fno-exceptions  -c -DCONF_RELEASE -I "src"  -o objs/mastersrv/mastersrv.o src/mastersrv/mastersrv.cpp
> src/mastersrv/mastersrv.cpp: In function 'void BuildPackets()':
> src/mastersrv/mastersrv.cpp:120:106: error: narrowing conversion of '255' from 'int' to 'char' inside { } [-Wnarrowing]
>      static char IPV4Mapping[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
>                                                                                                           ^
> 
> src/mastersrv/mastersrv.cpp:120:106: error: narrowing conversion of '255' from 'int' to 'char' inside { } [-Wnarrowing]
> bam: ret=256 g++ -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -fno-exceptions  -c -DCONF_RELEASE -I "src"  -o objs/mastersrv/mastersrv.o src/mastersrv/mastersrv.cpp
> bam: 'objs/mastersrv/mastersrv.o' error 256
> bam: error: a build step failed
> debian/rules:14: recipe for target 'override_dh_auto_build' failed

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