bug#65142: 30.0.50; configure --without-all does not disable some features

[Eli Zaretskii]

> From: Ulrich Mueller <ulm@gentoo.org>
> Cc: 65142@debbugs.gnu.org
> Date: Tue, 08 Aug 2023 16:41:40 +0200
> 
> >>>>> On Tue, 08 Aug 2023, Eli Zaretskii wrote:
> 
> > Thanks, but the proposed patch affects any option that is by default
> > "ifavailable", doesn't it?  If so, the patch is probably good for
> > master, but for the emacs-29 branch I'd prefer a safer change which
> > only affects the above two options.  Is that possible?
> 
> I had aimed for the master branch. :) It should also be o.k. for
> emacs-29, because json and tree-sitter are the only options that use
> OPTION_DEFAULT_IFAVAILABLE:
> 
> $ grep OPTION_DEFAULT_IFAVAILABLE configure.ac
> dnl OPTION_DEFAULT_IFAVAILABLE(NAME, HELP-STRING)
> AC_DEFUN([OPTION_DEFAULT_IFAVAILABLE], [dnl
> OPTION_DEFAULT_IFAVAILABLE([json], [compile with native JSON support])
> OPTION_DEFAULT_IFAVAILABLE([tree-sitter], [compile with tree-sitter])
> 
> A diff of the generated configure file with and without the patch
> confirms that no other option defaults are changed.
> 
> (There are other options that can have "ifavailable" as their value, but
> none of them uses the macro that is patched.)

OK, then please install this on master, and thanks.