"Unsupported argument with another option" build failure(s) — clang 3.4

PackageVersionSupposed error messageFull log Bug report
3dchess 0.8.1-17clang: error: unsupported option '-fpcc-struct-return' for target 'x86_64-pc-linux-gnu' Log
autodock-vina 1.1.2-3clang: error: unsupported option '--lto' Log
klibc 2.0.2-1clang: error: unsupported option '--print-libgcc' Log
libffi 3.0.13-10clang: error: unsupported argument '--gdwarf2' to option 'Wa,' Log
mlton 20100608-5.1clang: error: unsupported option '-gstabs+' Log
openttd 1.3.3-1clang: error: unsupported option '-dumpspecs' Log
syslinux 3:4.05+dfsg-6+deb8u1clang: error: unsupported option '--print-libgcc' Log
validns 0.7-1clang: error: unsupported option '--no-strict-aliasing' Log

8 errors