On newer Intel x86/64 CPUs and on OpenBSD, CompCert produced binaries will crash due to lack of IBT support. As a quick solution we can append “-z nobtcfi” to clinker_options in configure to disable IBT safeguards. However a preferable solution would be to add support for IBT on this platform. This can be partially solved by outputting “endbr64” after “.cfi_startproc” in backend/Printasmaux.ml. And then all that should be left is solving for jump tables. Thank you.