Mingw-w64 exception handling configuration

[Jeff Law]

On 05/12/2016 09:27 AM, Sandra Loosemore wrote:
> I see that the default EH behavior for a biarch mingw-w64 target GCC is
> to use SJLJ for the 32-bit multilib and SEH for the 64-bit one, but that
> there are #errors in cygming.h and mingw32.h that prevent you from
> configuring a biarch build with --disable-sjlj-exceptions to use DWARF-2
> and SEH, respectively.  Is there a deep reason for this, or is this just
> a case where nobody updated the configuration logic after SEH was
> implemented?  I understand that before that, you had to use SJLJ for
> 64-bit targets because the DWARF-2 support is restricted to 32-bit
> targets, so it was completely reasonable to error out.
>
> The reason I'm asking is, I have a third-party 32-bit library that was
> built for DWARF-2 EH....
No clue.  Your best bet would probably be to contact Kai. But I don't 
have current contact information for him.

jeff