[Bug libstdc++/113258] Pre-C++17 code that supplies operator new/delete crashes when mixed with post-C+17 code that uses the align_val_t variants of new/delete

[nmiell at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113258

--- Comment #3 from Nicholas Miell <nmiell at gmail dot com> ---
Windows and macOS (and Solaris) have sensible dynamic linker semantics where
the pre-C++17 code and the post-C++17 code uses two different C++ runtimes and
furthermore the application can use tcmalloc while the GPU driver uses whatever
allocator it feels like.

GCC has dealt with similar issues before, cf. bug 68210.

One way to fix this issue would probably be to cause the libstdc++ supplied
std::align_val_t variants to always invoke the pre-C++17 operators, since that
is the implicit ABI contract.