Meanwhile FreeBSD (on amd64, i386, armv6/7, aarch64) has been buildable with clang since some point in 9.x (2012-13), comes with clang only since 10.0 (01.2014), and since 12.0 the bootstrap linker on amd64/i386/armv7 is LLD (which was the case on aarch64 from the beginning iirc)
Though NetBSD is a bit behind on switching to the LLVM toolchain, here's a recent update https://blog.netbsd.org/tnf/entry/final_report_on_clang_lld
Meanwhile FreeBSD (on amd64, i386, armv6/7, aarch64) has been buildable with clang since some point in 9.x (2012-13), comes with clang only since 10.0 (01.2014), and since 12.0 the bootstrap linker on amd64/i386/armv7 is LLD (which was the case on aarch64 from the beginning iirc)