[cfe-users] order of object files at link affects exception catching

[krokus via cfe-users]

> Can you catch the exception with "catch (...)"?

I tried this route and added such catch-all clause just at the throw
site. Moreover, I put an explicit throw("catch-me") there in hope to
see if it wil just get caught rightaway. Nope, the exception is thrown
properly, but the catch (...) is not invoked. I can clearly see the
stack trace on the crash log, with the throw happening correctly, then
handed over to clang's libc++abi.1.dylib (__cxa_throw) , then
proceeding into std::__terminate(), ending up in abort() from
libsystem_c.dylib. As if the catch clause is not there.  The build
process is done with explicit  -fexceptions and clang's default RTTI
(that is it's ON in this case).

Which makes me believe there's something else at play in this program
that somehow disturbs the exception handling process. It's still not
clear why changing the order of the linking object files results in
correct catching of those throws; and why this happens only with this
OSX+clang mix. To be specific, I ordered the objects according to how
they appear on the crash log, with the rest following it
alphabetically just as before.

Thank you for you input! For now this helps me eliminate some
possibility of misconfiguration of the pre-built clang and focus more
on the program's entrails.