[libcxx-commits] [PATCH] D122536: [libc++] Optimize `exception_ptr`, especially for the empty case

[Fabian Wolff via Phabricator via libcxx-commits]

fwolff added a comment.

In D122536#3633419 <https://reviews.llvm.org/D122536#3633419>, @philnik wrote:

> The problem is that you have introduced new symbols to the dylib. I think the easiest way to avoid this is to use `__cxa_{increment, decrement}_exception_refcount` in the header directly.

How is this supposed to work? Including `cxxabi.h` in the header breaks everything, and nowhere else in `libcxx/include/` do any `__cxa_*` functions get called. Also, there must be a way to distinguish `exception_pointer_cxxabi.ipp` from `exception_pointer_unimplemented.ipp` in the header if we're not going to introduce any additional symbols; how should I go about doing this?


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