[Bug libstdc++/83662] std::aligned_alloc() not available

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83662

--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Snow Leopard is *ancient*, it didn't support aligned_alloc. According to Bug
92143 you need macOS 10.15 i.e. Catalina.