"Not allowed args fails the build" build failure(s) — clang 6.0

PackageVersionSupposed error messageFull log Bug report
cld2 0.0.0-git20150806-6error: invalid argument '-std=c++98' not allowed with 'C' Log
devil 1.7.8-10error: invalid argument '-std=gnu99' not allowed with 'C++' Log
freebayes 1.1.0-2error: invalid argument '-std=gnu++11' not allowed with 'C' Log
freemat 4.2+dfsg1-6error: invalid argument '-std=c++11' not allowed with 'C' Log
gargoyle-free 2011.1b-1error: invalid argument '-std=gnu++98' not allowed with 'C' Log 757426
guitarix 0.36.1-1error: invalid argument '-std=c++11' not allowed with 'C' Log
irstlm 6.00.05-2error: invalid argument '-std=c++0x' not allowed with 'C' Log
oggvideotools 0.9.1-4error: invalid argument '--std=c++0x' not allowed with 'C' Log
repsnapper 2.5a5-1error: invalid argument '--std=c++11' not allowed with 'C' Log
uwsgi-plugin-mongo 0.0.3error: invalid argument '-std=c++11' not allowed with 'C' Log

10 errors