Re: master b9ac4f8.. (Fix locating pdump by symlink) breaks with stow

[Ergus <spacibba@aol.com>]

On Mon, Jun 24, 2019 at 06:57:32PM +0700, Yuri Khan wrote:
>On Mon, Jun 24, 2019 at 6:12 PM Ergus <spacibba@aol.com> wrote:
>
>> 750|  char* argv0 = realpath (argv[0], NULL);
>> 751|  if (!argv0)
>> 752|    fatal ("could not resolve realpath of \"%s\": %s",
>> 752|           argv0, strerror (errno));
>
>This looks wrong. If we called realpath and it returned null, we???d
>probably want the original argv[0] in the error message, not the null
>result.
>

This also produces problems when using emacs from an alias like em o emc 
which is a very common practice.

So there should be actually other conditions to try if the first 
realpath call fails and not abort (call fatal) in the first try.