On Wed, Aug 09, 2017 at 03:41:33PM -0600, Jeremie Courreges-Anglas wrote:
> CVSROOT:      /cvs
> Module name:  ports
> Changes by:   j...@cvs.openbsd.org    2017/08/09 15:41:33
> Added files:
>       net/isc-dhcp/patches: 
>                             patch-bind_bind-9_9_9-P3_lib_isc_backtrace_c 
> Log message:
> Unbreak build on amd64
> clang from base doesn't provide _Unwind_* functions (yet?)

the symbols are not in compiler_rt but rather libc++abi

$ nm /usr/lib/libc++abi.so.0.0 | fgrep _Unwind
00039a40 T _Unwind_Backtrace
0003ad30 T _Unwind_DeleteException
00039980 T _Unwind_FindEnclosingFunction
00039bf0 T _Unwind_Find_FDE
0003ab50 T _Unwind_ForcedUnwind
00039cd0 T _Unwind_GetCFA
00039880 T _Unwind_GetDataRelBase
0003ad90 T _Unwind_GetGR
0003ae70 T _Unwind_GetIP
00039d50 T _Unwind_GetIPInfo
0003ac00 T _Unwind_GetLanguageSpecificData
0003acb0 T _Unwind_GetRegionStart
00039900 T _Unwind_GetTextRelBase
0003a040 T _Unwind_RaiseException
0003a740 T _Unwind_Resume
000397e0 T _Unwind_Resume_or_Rethrow
0003ae10 T _Unwind_SetGR
0003aef0 T _Unwind_SetIP
00038760 t 
00038e10 t _ZN10__cxxabiv1L14call_terminateEbP17_Unwind_Exception
0003b2f0 t 
0003b7c0 t 

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