x86 arm powerpc riscv
amd64 i386 32 64 32 64
Clang/LLVM family
Clang ✓ ✓ ✓ ✓ 4 4 ?
lldb ✓ 1 ✓ ✓ ? ? X
lld ✓ ✓ ✓ ✓ ✓ ✓ ✓
libunwind ✓ ✓ ✓ ✓ ✓ ✓ 2
ELF Tool Chain
libelf ✓ ✓ ✓ ✓ ? ? ?
libdwarf ✓ ✓ ✓ ✓ ? ? ?
elfcopy ✓ ✓ ✓ ✓ ✓ ✓
readelf ✓ ✓ ✓ ✓ ✓ ✓ ✓
Other
compiler-rt ✓ ✓ ✓ ✓ ✓ ✓ ✓

Notes

  1. LLDB has a FreeBSD/i386 implementation but it is not functional.
  2. NetBSD has a version of LLVM libunwind that has additional arch support - http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/lib/libunwind/
  3. Clang/LLVM MIPS support tracked in upstream PR http://llvm.org/pr23370
  4. Clang/LLVM PPC support tracked in upstream PR http://llvm.org/pr25780