[Bug libstdc++/99876] std::filesystem::absolute is inefficient

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99876

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:154316697dbea9ba96bc14680b642b3ae35dadbd

commit r10-10186-g154316697dbea9ba96bc14680b642b3ae35dadbd
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Fri Aug 27 10:59:54 2021 +0100

    libstdc++: Fix inefficiency in filesystem::absolute [PR99876]

    When the path is already absolute, the call to current_path() is
    wasteful, because operator/ will ignore the left operand anyway.

    Signed-off-by: Jonathan Wakely <jwak...@redhat.com>

    libstdc++-v3/ChangeLog:

            PR libstdc++/99876
            * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
            to avoid unnecessary current_path() call.

    (cherry picked from commit 07b990ee23e0c7a92d362dbb25fd5d57d95eb8be)