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From: Doods Pav <doodspav@gmail.com>
Date: Sun, 20 Mar 2022 15:38:09 +0000
Message-ID: <CAA41uA6YY2yGvhtF9zbK6Srb2QB4sQyEMN0k121kZ+tNy0-qGg@mail.gmail.com>
Subject: Is changing __STDCPP_DEFAULT_NEW_ALIGNMENT__ an ABI break
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Is changing the value of the predefined macro
`__STDCPP_DEFAULT_NEW_ALIGNMENT__` considered an ABI break? (in the same
way that modifying `alignof(std::max_align_t)` would be).

I would assume that it is, but I saw this comment on a bug report (
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77691#c33) and I'm unsure if
the value of the macro was later changed in a patch, and if so, if that was
considered an ABI break.