[Bug libstdc++/67173] experimental/filesystem/operations/current_path.cc FAILs

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67173

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Solaris 10 doesn't support realpath(path, NULL) as used in
filesystem::canonical() so we need to allocate a buffer for it.