bug#30350: Build breakage of master on MacOS 10.13

[Mikhail Gusarov]

On Tue, 6 Feb 2018, at 22:29, Philipp Stephani wrote:

I'm saying that on OS X stat'ing /bin/zsh and /bin/zsh/ (or /bin/zsh/.) gives different results:

% stat /bin/zsh

16777220 721698 -rwxr-xr-x 1 root wheel 0 610288 "Feb  6 22:24:24 2018" "Sep 21 06:35:23 2017" "Nov  6 13:34:29 2017" "Sep 21 06:35:23 2017" 4194304 808 0x80020 /bin/zsh

% stat /bin/zsh/.

stat: /bin/zsh/.: stat: Not a directory

% stat /bin/zsh/

stat: /bin/zsh/: stat: Not a directory

%

That's the behavior required by POSIX, and Linux behaves in exactly the same way, so it's not something where we'd need to special-case macOS. 

Ah, ignore me then, please :)