https://en.cppreference.com/w/cpp/memory/allocator/construct
"(deprecated in C++17) (removed in C++20)"
Same for `destroy`.
Reviewed By: zeddb
Differential Revision: https://developer.blender.org/D9657
The config.h file is autogenerated during compile by a 3rd party library
quadriflow uses. Now we put this file in the build directory to avoid
adding this to the git repository in the future.