[Bug libstdc++/118158] New: std::filesystem::equivalent unsupported on socket files

[davidepesa at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118158

            Bug ID: 118158
           Summary: std::filesystem::equivalent unsupported on socket
                    files
           Product: gcc
           Version: 14.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: davidepesa at gmail dot com
  Target Milestone: ---

Calling std::filesystem::equivalent() on two socket files throws:

std::filesystem::__cxx11::filesystem_error: filesystem error: cannot check file
equivalence: Operation not supported [/tmp/foo.sock] [foo.sock]

Is there a reason for this limitation?
Boost.Filesystem seems to work fine in this scenario, it just compares st_ino
and st_dev as suggested by [fs.op.equivalent].