Re: [PATCH] Add shell-quasiquote.

[Paul Eggert]

On 10/22/2015 08:03 AM, Eli Zaretskii wrote:
> > I beg to differ: IMHO, on Unix-like systems, there's no point for
> > >`shell-command' and friends to support anything but /bin/sh, which is
> > >certainly a Bourne shell and hopefully reasonably POSIX compliant.
> I see your point.  However, this is contrary to a very old and
> documented behavior.  Would such a change be acceptable?

I suppose it would be an incompatible change, but I think it'd be a good 
idea. Emacs already distinguishes between interactive shells and shells 
invoked as utilities, and uses explicit-shell-file-name for the former 
but shell-file-name for the latter. We could put into the documentation 
that the latter should be a POSIX-syntax shell (not "POSIX-conforming" 
because strict POSIX conformance is relatively rare). People writing 
Elisp code shouldn't have to worry about the syntax of the C shell, or 
of some MS-Windows shell.