mstorsjo wrote:

> Hmm...
> 
> Maybe the backend should have some notion of a default ctors section. So if 
> the frontend doesn't explicitly specify anything, the backend tries to pick 
> the right default.

Yep, this is kinda the same issue for lots of target specific options that are 
set as bools..., while the ideal I guess either would be an `optional<bool>`, 
or to initialize the bools to the target specific actual value.

In this case, I would maybe suggest merging both this and #68570 - that should 
both fix behaviours and make clang aware of the reality, and leave the root 
design issue for someone else to take on... WDYT?

https://github.com/llvm/llvm-project/pull/68571
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