Dear Andrea and others working native compilation,

I've been testing out the feature/native-comp branch and experienced an
issue with the elpher package (version 2.10, available on MELPA Stable)
that only occurs once this package has been compiled into a .eln file. When
using elpher to visit some, but not all, gemini URLs it produces the
following error message:

  Symbol’s function definition is void: \(setf\ url-port\)

I've assembled a minimal working example that triggers the issue when I
attempt to visit the URL 'gemini://mozz.us/':

---------- MWE starts ----------
(require 'package)

(add-to-list 'package-archives
             '("melpa-stable" . "https://stable.melpa.org/packages/") t)

(package-initialize)
(unless package-archive-contents
  (package-refresh-contents))

(unless (package-installed-p 'use-package)
  (package-install 'use-package))

(eval-when-compile (require 'use-package))

(use-package elpher
  :ensure t
  :pin melpa-stable)

(elpher-go "gemini://mozz.us/")
---------- MWE ends ----------

If I run (elpher-go "gemini://mozz.us/") before the .eln file is produced,
it visits the URL without any problems.

Thank you very much for all of your work on native compilation. It's made
noticeable differences in a few circumstances where I normally experience a
bit of lag/unresponsiveness, which I really appreciate.

All the best,
Rob


In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22,
cairo version 1.16.0)
 of 2020-08-27 built on hermes
Repository revision: aa526c9470d679e9144af55d9e56928a111d2ceb
Repository branch: native-comp
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid

Configured using:
 'configure --with-nativecomp --with-json --with-cairo
 --prefix=/opt/emacs28 CFLAGS=-O2'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ LIBOTF ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES NATIVE_COMP THREADS
LIBSYSTEMD JSON PDUMPER LCMS2

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Load-path shadows:
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Memory information:
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 (symbols 48 43469 48)
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