> From: Bruno Haible <br...@clisp.org>
> Cc: Paul Smith <psm...@gnu.org>
> Date: Sun, 15 Sep 2019 19:58:56 +0200
> 
> +   - Otherwise, it sets errno and returns NULL.
> +     Specific errno values include:
> +       - ENOENT: means that the program's file was not found.
> +       - EACCESS: means that the program's file was found but lacks the
> +         execute permissions.

The value of EACCES (not EACCESS!) on MS-Windows frequently means the
file cannot be accessed for a reason that has nothing to do with
execute permissions.  It could be, for example, that some intermediate
directory in the full file name doesn't exist or is otherwise
inaccessible.

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