gnu: Remove WebKitGTK@2.20.

* gnu/packages/gnome.scm (eolie, epiphany)[native-inputs]: Remove GCC-7.
[inputs]: Change WEBKITGTK-2.22 to WEBKITGTK.
[arguments]: Adjust accordingly.
* gnu/packages/web-browsers.scm (next-gtk-webkit): Likewise.
* gnu/packages/webkit.scm (webkitgtk): Update to 2.22.6.
(webkitgtk-2.22): Remove variable.

gnu/packages/gnome.scm

@@ -4130,7 +4130,6 @@ work and the interface is well tested.")
                     ;; These libraries must be on LD_LIBRARY_PATH.
                     (libs '("gtkspell3" "webkitgtk" "libsoup" "libsecret"
                             "atk" "gtk+" "gsettings-desktop-schemas"
-                            "gcc:lib" ; needed b/c webkitgtk is built with gcc-7
                             "gobject-introspection"))
                     (path (string-join
                            (map (lambda (lib)
@@ -4143,8 +4142,7 @@ work and the interface is well tested.")
                  `("GI_TYPELIB_PATH" = (,(getenv "GI_TYPELIB_PATH")))))
              #t)))))
     (native-inputs
-     `(("gcc:lib" ,gcc-7 "lib") ; needed because webkitgtk is built with gcc-7
-       ("intltool" ,intltool)
+     `(("intltool" ,intltool)
        ("itstool" ,itstool)
        ("pkg-config" ,pkg-config)
        ("python" ,python)
@@ -4165,7 +4163,7 @@ work and the interface is well tested.")
        ("libsecret" ,libsecret)
        ("gtkspell3" ,gtkspell3)
        ("gsettings-desktop-schemas" ,gsettings-desktop-schemas)
-       ("webkitgtk" ,webkitgtk-2.22)))
+       ("webkitgtk" ,webkitgtk)))
     (home-page "https://wiki.gnome.org/Apps/Eolie")
     (synopsis "Web browser for GNOME")
     (description
@@ -4203,7 +4201,6 @@ a secret password store, an adblocker, and a modern UI.")
      `(("dconf" ,dconf)))
     (native-inputs
      `(("desktop-file-utils" ,desktop-file-utils) ; for update-desktop-database
-       ("gcc" ,gcc-7)  ; needed because webkitgtk-2.22 is compiled with gcc-7
        ("glib:bin" ,glib "bin") ; for glib-mkenums
        ("gtk+:bin" ,gtk+ "bin") ; for gtk-update-icon-cache
        ("intltool" ,intltool)
@@ -4224,7 +4221,7 @@ a secret password store, an adblocker, and a modern UI.")
        ("libxslt" ,libxslt)
        ("nettle" ,nettle) ; for hogweed
        ("sqlite" ,sqlite)
-       ("webkitgtk" ,webkitgtk-2.22)))
+       ("webkitgtk" ,webkitgtk)))
     (home-page "https://wiki.gnome.org/Apps/Web")
     (synopsis "GNOME web browser")
     (description

gnu/packages/web-browsers.scm

@@ -383,10 +383,7 @@ driven and does not detract you from your daily work.")
     (arguments
      `(#:tests? #f                      ; no tests
        #:make-flags (list "gtk-webkit"
-                          (string-append
-                           "CC="
-                           (assoc-ref %build-inputs "gcc-7")
-                           "/bin/gcc")
+                          "CC=gcc"
                           (string-append "PREFIX=" %output))
        #:phases
        (modify-phases %standard-phases
@@ -397,10 +394,9 @@ driven and does not detract you from your daily work.")
     (inputs
      `(("glib-networking" ,glib-networking)
        ("gsettings-desktop-schemas" ,gsettings-desktop-schemas)
-       ("webkitgtk" ,webkitgtk-2.22)))
+       ("webkitgtk" ,webkitgtk)))
     (native-inputs
-     `(("gcc-7" ,gcc-7) ; needed because webkitgtk-2.22 is compiled with gcc-7
-       ("pkg-config" ,pkg-config)))
+     `(("pkg-config" ,pkg-config)))
     (home-page "https://next.atlas.engineer")
     (synopsis "Infinitely extensible web-browser (user interface only)")
     (description "Next is a keyboard-oriented, extensible web-browser

gnu/packages/webkit.scm

@@ -59,14 +59,14 @@
 (define-public webkitgtk
   (package
     (name "webkitgtk")
-    (version "2.20.5")
+    (version "2.22.6")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://www.webkitgtk.org/releases/"
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "147r7an41920zl4x9srdva7fxvw2znjin5ldjkhay1cndv9gih0m"))))
+                "0ny8azipr2dmdk79qrf4hvb2p4k5b3af38szjhmhg8mh1nfdp46z"))))
     (build-system cmake-build-system)
     (outputs '("out" "doc"))
     (arguments
@@ -160,33 +160,3 @@ HTML/CSS applications to full-fledged web browsers.")
                    license:lgpl2.1+
                    license:bsd-2
                    license:bsd-3))))
-
-;; This version of webkitgtk needs to be kept separate, because it requires a
-;; newer version of GCC than our default compiler, and this causes problems
-;; when linked with C++ libraries built using our default compiler.  For now,
-;; we use this newer webkitgtk only for selected packages, e.g. epiphany.
-(define-public webkitgtk-2.22
-  (package/inherit webkitgtk
-    (name "webkitgtk")
-    (version "2.22.6")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://www.webkitgtk.org/releases/"
-                                  name "-" version ".tar.xz"))
-              (sha256
-               (base32
-                "0ny8azipr2dmdk79qrf4hvb2p4k5b3af38szjhmhg8mh1nfdp46z"))))
-    (native-inputs
-     `(("gcc" ,gcc-7)  ; webkitgtk-2.22 requires gcc-6 or newer
-       ,@(package-native-inputs webkitgtk)))
-    (arguments
-     (substitute-keyword-arguments (package-arguments webkitgtk)
-       ((#:phases phases)
-        `(modify-phases ,phases
-           (add-before 'configure 'work-around-gcc-7-include-path-issue
-             ;; FIXME: Work around a problem with gcc-7 includes (see
-             ;; <https://bugs.gnu.org/30756>).
-             (lambda _
-               (unsetenv "C_INCLUDE_PATH")
-               (unsetenv "CPLUS_INCLUDE_PATH")
-               #t))))))))