"Unsupported argument with another option" build failure(s) — clang 6.0

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 1.1.2-4clang: error: unsupported option '--lto' Log
dbusada 0.4.0-2clang: error: unsupported option '--dump-ada-spec' Log
freecontact 1.0.21-6clang: error: unsupported option '--help=optimizers' Log
libffi 3.2.1-8clang: error: unsupported option '-print-multi-os-directory' Log
libre 0.5.7-1clang: error: unsupported option '--print-multiarch' Log
openjdk-8-jre-dcevm 8u112-2clang: error: unsupported option '-dumpspecs' Log
stalin 0.11-6clang: error: unsupported option '-freg-struct-return' for target 'x86_64-pc-linux-gnu' Log
supermin 5.1.19-2clang: error: unsupported option '-specs /usr/share/dpkg/no-pie-compile.specs' Log
syslinux 3:6.03+dfsg1-2clang: error: unsupported option '--print-libgcc' Log

10 errors