Hi libunwind 1.6.2 includes support for s390x and riscv64, as can be seen in this recent upload to Ubuntu [1]:
libunwind (1.6.2-0ubuntu1) kinetic; urgency=medium * New upstream release. * Drop patches applied upstream. * Build for s390x and riscv64. -- Dimitri John Ledkov <dimitri.led...@canonical.com> Thu, 30 Jun 2022 16:42:32 +0100 Regards Graham [1] https://launchpad.net/ubuntu/+source/libunwind/1.6.2-0ubuntu1
