"Not allowed args fails the build" build failure(s) — clang 12.0.1

PackageVersionSupposed error messageFull log Bug report
apngdis 2.9-3error: invalid argument '-std=c99' not allowed with 'C++' Log
cubemap 1.4.3-2error: invalid argument '-std=gnu++11' not allowed with 'C' Log
devil 1.7.8-10error: invalid argument '-std=gnu99' not allowed with 'C++' Log
grpc 1.30.2-3error: invalid argument '-std=gnu99' not allowed with 'C++' Log
irstlm 6.00.05-2error: invalid argument '-std=c++0x' not allowed with 'C' Log
libsass-python 0.20.1-3error: invalid argument '-std=gnu++0x' not allowed with 'C' Log
mypy 0.910-3error: invalid argument '--std=c++11' not allowed with 'C' Log
objcryst-fox 1.9.6.0-2.2error: invalid argument '-std=gnu++98' not allowed with 'C' Log
oggvideotools 0.9.1-6error: invalid argument '--std=c++0x' not allowed with 'C' Log
pbdagcon 0.3+git20180411.c14c422+dfsg-4error: invalid argument '-std=c++11' not allowed with 'C' Log
repsnapper 2.5a5-3error: invalid argument '--std=c++11' not allowed with 'C' Log
uwsgi-plugin-mongo 0.0.8error: invalid argument '-std=c++11' not allowed with 'C' Log
vg 1.30.0+ds-1error: invalid argument '-std=c++14' not allowed with 'C' Log

13 errors