Bug#811831: projectm: FTBFS with GCC 6: no match for

[Martin Michlmayr]

Package: projectm
Version: 2.1.0+dfsg-3
Severity: important
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-6 gcc-6-no-match

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
...
> [ 30%] Building CXX object libprojectM/MilkdropPresetFactory/CMakeFiles/MilkdropPresetFactory.dir/Parser.cpp.o
> cd /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/build/libprojectM/MilkdropPresetFactory && /usr/bin/c++   -DCMAKE_INSTALL_PREFIX="\"\\\"/usr\\\"\"" -I/<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM  -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -fPIC   -o CMakeFiles/MilkdropPresetFactory.dir/Parser.cpp.o -c /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp
> /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp: In static member function 'static PerFrameEqn* Parser::parse_implicit_per_frame_eqn(std::istream&, char*, int, MilkdropPreset*)':
> /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp:1409:10: error: no match for 'operator==' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'long int')
>    if (fs == NULL)
>        ~~~^~~~
> 
> /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp:1409:10: note: candidate: operator==(int, long int) <built-in>
> /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp:1409:10: note:   no known conversion for argument 1 from 'std::istream {aka std::basic_istream<char>}' to 'int'
> In file included from /usr/include/c++/6/set:62:0,
>                  from /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.hpp:82,
>                  from /<<BUILDDIR>>/projectm-2.1.0+dfsg/src/libprojectM/MilkdropPresetFactory/Parser.cpp:39:
> /usr/include/c++/6/bits/stl_multiset.h:823:5: note: candidate: template<class _Key, class _Compare, class _Alloc> bool std::operator==(const std::multiset<_Key, _Compare, _Alloc>&, const std::multiset<_Key, _Compare, _Alloc>&)
>      operator==(const multiset<_Key, _Compare, _Alloc>& __x,
>      ^~~~~~~~