Where is boost/detail/workaround.hpp?

[prodrigs]

A number of files in boost/type_traits include the header boost/detail/workaround.hpp. However, there is no such file here and compilation breaks if boost/detail is included as a git submodule to some project. Curiously, the needed header file (and a few more) are available in boost-1.78.0.tar.gz and compilation goes smoothly if boost is compiled and installed first as an external library. Aren't these modules synchronised with the official releases?

[Lastique]

It's in Boost.Config. The header is deprecated and forwards to boost/config/workaround.hpp.