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From: "pdimov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102350] __builtin_source_location not available in earlier
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Date: Thu, 16 Sep 2021 10:15:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102350

--- Comment #8 from Peter Dimov <pdimov at gmail dot com> ---
(In reply to Jakub Jelinek from comment #6)
> Note, having the struct somewhere else isn't that useful unless you know
> exactly how its non-static data members are named and what they mean, so
> ideally a class with accessor methods, which is what std::source_location
> provides currently.

I was going to undefined-behavior my way to victory by making
boost::source_location layout-compatible with the internal struct, and just
casting the result of __builtin_source_location to boost::source_location
const*. I think this works under the GCC object model?=