"Unknown warning option" build failure(s) — clang 5.0

PackageVersionSupposed error messageFull log Bug report
clutter-gesture 0.0.2.1-7.1error: unknown warning option '-Werror=unused-but-set-variable'; did you mean '-Werror=unused-const-variable'? [-Werror,-Wunknown-warning-option] Log
faketime 0.9.6-7error: unknown warning option '-Wno-nonnull-compare'; did you mean '-Wno-enum-compare'? [-Werror,-Wunknown-warning-option] Log
freebsd-glue 0.2.22error: unknown warning option '-Werror=maybe-uninitialized'; did you mean '-Werror=uninitialized'? [-Werror,-Wunknown-warning-option] Log
libmbim 1.14.0-1error: unknown warning option '-Wunused-but-set-variable'; did you mean '-Wunused-const-variable'? [-Werror,-Wunknown-warning-option] Log
libqmi 1.18.0-2error: unknown warning option '-Wunused-but-set-variable'; did you mean '-Wunused-const-variable'? [-Werror,-Wunknown-warning-option] Log
scanbd 1.4.4-1error: unknown warning option '-Werror=clobbered'; did you mean '-Werror=consumed'? [-Werror,-Wunknown-warning-option] Log
xlog 2.0.14-1error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option] Log

7 errors