[Bug libstdc++/93469] memory header fails to compile with _XOPEN_SOURCE macro defined and -std=c++2a option specified

[karen.arutyunov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93469

--- Comment #3 from Karen <karen.arutyunov at gmail dot com> ---
Created attachment 47723
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47723&action=edit
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