libboost-filesystem-dev 1.71.0.0ubuntu1 (amd64 binary) in ubuntu focal

 This package forms part of the Boost C++ Libraries collection.
 .
 The Boost Filesystem Library provides portable facilities to query and
 manipulate paths, files, and directories. The goal is to
 facilitate portable script-like operations from within C++ programs.
 .
 This package is a dependency package, which depends on Debian's default
 Boost version (currently 1.71).