[Debian-med-packaging] Bug#812011: snap: FTBFS with GCC 6: self-comparison always evaluates

[Andreas Tille]

Hello,

there is an error in the Debian bug tracking system about problems when
building snap using gcc-6.  Do you have any suggestion how to solve this
issue?

Kind regards

        Andreas.

On Tue, Jan 19, 2016 at 08:29:47PM -0800, Martin Michlmayr wrote:
> Package: snap
> Version: 2013-11-29-1
> Severity: important
> User: debian-gcc at lists.debian.org
> Usertags: ftbfs-gcc-6
> 
> 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
> ...
> > gcc -O2 -Wall -Werror -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -c -o zoeAlignment.o zoeAlignment.c
> > zoeAlignment.c: In function 'zoeHSPCmpQuery':
> > zoeAlignment.c:678:50: error: self-comparison always evaluates to false [-Werror=tautological-compare]
> >   else if (h1->q_start > h2->q_start && h2->q_end > h2->q_end) return  1;
> >                                                   ^
> > 
> > zoeAlignment.c: In function 'zoeHSPCmpSbjct':
> > zoeAlignment.c:684:50: error: self-comparison always evaluates to false [-Werror=tautological-compare]
> >   else if (h1->s_start > h2->s_start && h2->s_end > h2->s_end) return  1;
> >                                                   ^
> > 
> > cc1: all warnings being treated as errors
> > Makefile:110: recipe for target 'zoeAlignment.o' failed
> 
> -- 
> Martin Michlmayr
> Linux for HPE Helion, Hewlett Packard Enterprise
> 
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