"Unsupported argument with another option" build failure(s) — clang 9.0.1

PackageVersionSupposed error messageFull log Bug report
autodock-vina 1.1.2-5clang: error: unsupported option '--lto'; did you mean '-flto'? Log
freecontact 1.0.21-7clang: error: unsupported option '--help=optimizers' Log
qemu 1:4.2-3clang: error: unsupported argument '-32' to option 'Wa,' Log
supermin 5.1.20-2clang: error: unsupported option '-specs /usr/lib/x86_64-linux-musl/musl-gcc.specs' Log

4 errors