Boost 1.39 for the Win32 Classic Toolchain from November 22, 2021 (update)

The Boost libraries are a set of C++ libraries that significantly expand the language using template metaprogramming.

This version (1.39) is for the classic toolchain for Win32 only.

Use Boost 1.70 for the modern Win32 and Win64 Clang-enhanced platforms.

https://developer.team/delphi/31341-boost-139-for-the-win32-classic-toolchain-from-november-22-2021-update.html