Argument unused caused failure - Rebuild of the Debian archive with clang

"Argument unused caused failure" build failure(s)
clang 3.4.2

Unknown or unused arguments triggers errors with -Werror:
clang -Werror -ggdb3 foo.c

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log
dwb	20140415hg-1	clang: error: argument unused during compilation: '--ansi'	Log
lebiniou	3.20-1	clang: error: argument unused during compilation: '-e xport-dynamic'	Log
libwebsockets	1.2.2-1	clang: error: argument unused during compilation: '-rdynamic'	Log
lxc	1.0.4-3	clang: error: argument unused during compilation: '-L../../src/lxc/'	Log
policycoreutils	2.3-1	clang: error: argument unused during compilation: '-shared'	Log

5 errors

Debian Package rebuild