<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">We don't talk publicly about any internal plans, but any vendor that supports back-deployment to old OS releases couldn't migrate off v1 until a very long time after shipping v2.<div class=""><br class=""></div><div class=""><div class=""><div><blockquote type="cite" class=""><div class="">On 2019 Mar 19, at 22:47, Eric Fiselier <<a href="mailto:eric@efcs.ca" class="">eric@efcs.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Does Apple have a plan to migrate off ABI v1?<div class=""><br class=""></div><div class="">/Eric</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Mar 19, 2019 at 5:33 PM Duncan Exon Smith via libcxx-dev <<a href="mailto:libcxx-dev@lists.llvm.org" class="">libcxx-dev@lists.llvm.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br class="">
> On 2019 Mar 19, at 13:10, Louis Dionne via libcxx-dev <<a href="mailto:libcxx-dev@lists.llvm.org" target="_blank" class="">libcxx-dev@lists.llvm.org</a>> wrote:<br class="">
> <br class="">
> I'd like to know whether folks currently have breaking changes planned for the version 2 ABI of libc++. Are we aware of improvements that would require breaking the ABI and that we have not implemented yet?<br class="">
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The one I'm aware of is a compressed mangling for versioning namespaces:<br class="">
<a href="https://github.com/itanium-cxx-abi/cxx-abi/pull/69" rel="noreferrer" target="_blank" class="">https://github.com/itanium-cxx-abi/cxx-abi/pull/69</a><br class="">
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