[Bug libstdc++/83306] filesystem_error is not nothrow copyable

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83306

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Nov 28 17:07:22 2018
New Revision: 266569

URL: https://gcc.gnu.org/viewcvs?rev=266569&root=gcc&view=rev
Log:
Fix undefined references in libstdc++fs.a

The recent patch for PR 83306 removed the fs_err_concat functions that
were used by the experimental::filesystem::filesystem_error class as
well. This fixes it by doing the string generation directly in
filesystem_error::_M_gen_what() instead of using the removed function.

        PR libstdc++/83306
        * src/filesystem/path.cc (filesystem_error::_M_gen_what()): Create
        string directly, instead of calling fs_err_concat.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/src/filesystem/path.cc