Perl does not support utime with nanosecond resolution

["Steve Keller" <keller.steve@gmx.de>]

The Perl module Time::HiRes in Debian stretch does support nanosecond
resolution for stat() but not for utime(), although Linux has the
utimensat() system call providing that function.

    $ cat /etc/debian_version
    9.9
    $ perl -e "use Time::HiRes qw(stat);"
    $ perl -e "use Time::HiRes qw(utime);"
    "utime" is not exported by the Time::HiRes module
    Can't continue after import errors at /usr/lib/x86_64-linux-gnu/perl/5.24/Time/HiRes.pm line 68.
    BEGIN failed--compilation aborted at -e line 1.
    $

BTW, Ubuntu 18.04, with perl 5.26, supports this:

    $ cat /etc/debian_version
    buster/sid
    $ perl -e "use Time::HiRes qw(stat);"
    $ perl -e "use Time::HiRes qw(utime);"
    $

What's the reason for this and can I enable utime() with nanosecond
support in Debian stretch?

Steve