https://bugs.winehq.org/show_bug.cgi?id=38713
--- Comment #10 from Marcus Meissner marcus@jet.franken.de --- linux x86_64 libunwind does not contain this function _Unwind_RaiseException...
nm -D /usr/lib64/libunwind.so |grep -v x86
has these usable symbols: 00000000000027f0 T _U_dyn_cancel 0000000000002870 T _U_dyn_info_list_addr 0000000000002880 T _U_dyn_register 0000000000002720 T unw_backtrace
perhaps a AC_TRY_LINK() construct is needed.