"Unsupported argument with another option" build failure(s) — clang 10.0.0

PackageVersionSupposed error messageFull log Bug report
3dchess 0.8.1-20clang: error: unsupported option '-fpcc-struct-return' for target 'x86_64-pc-linux-gnu' Log
autodock-vina 1.1.2-5clang: error: unsupported option '--lto'; did you mean '-flto'? Log
dbusada 0.5.0-4clang: error: unsupported option '--dump-ada-spec' Log
freecontact 1.0.21-7clang: error: unsupported option '--help=optimizers' Log
libffi 3.3-4clang: error: unsupported option '-print-multi-os-directory' Log
libgmpada 1.3-2clang: error: unsupported option '--dump-ada-spec' Log
stalin 0.11-6clang: error: unsupported option '-freg-struct-return' for target 'x86_64-pc-linux-gnu' Log
supermin 5.2.0-1clang: error: unsupported option '-specs /usr/lib/x86_64-linux-musl/musl-gcc.specs' Log

8 errors