[clang] [WinEH] Also check object unwinding for enabling CXXExceptions(/ehs*) (PR #180959)

[via cfe-commits]

GkvJwa wrote:

> Thanks!
> 
> The functional change looks good to me.
> 
> I'm having trouble understanding the title:
> 
> > [WinEH] Also check object unwinding for enabling CXXExceptions(/ehs*)
> 
> How about something like "[WinEH] Only emit err_seh_object_unwinding when CXXExceptions are enabled"?

It can be modified as follows. However, this PR might only be regarded as a part of it. For the ehs*(cxxexception), it has not been fully handled yet.

In fact, it is caused by the different levels of support for seh from the several switches mentioned in the previous PR

https://github.com/llvm/llvm-project/pull/180959