3 files changed, 46 insertions(+), 2 deletions(-)

M gnu-system.am
M gnu/packages/gtk.scm
A gnu/packages/patches/gtk3-respect-GUIX_GTK3_PATH.patch

@@ 507,6 507,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/guile-relocatable.patch			\
   gnu/packages/patches/guile-rsvg-pkgconfig.patch		\
   gnu/packages/patches/gtk2-respect-GUIX_GTK2_PATH.patch	\
+  gnu/packages/patches/gtk3-respect-GUIX_GTK3_PATH.patch	\
   gnu/packages/patches/gtkglext-disable-disable-deprecated.patch \
   gnu/packages/patches/hop-bigloo-4.0b.patch			\
   gnu/packages/patches/hop-linker-flags.patch			\

@@ 583,7 583,8 @@ application suites.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "0lp1hn0qydxx03bianzzr0a4maqzsvylrkzr7c3p0050qihwbgjx"))))
+              "0lp1hn0qydxx03bianzzr0a4maqzsvylrkzr7c3p0050qihwbgjx"))
+            (patches (list (search-patch "gtk3-respect-GUIX_GTK3_PATH.patch")))))
    (propagated-inputs
     `(("at-spi2-atk" ,at-spi2-atk)
       ("atk" ,atk)


@@ 642,7 643,11 @@ application suites.")
                  (loaders.cache (find-files librsvg "^loaders\\.cache$")))
             (wrap-program prog
               `("GDK_PIXBUF_MODULE_FILE" = ,loaders.cache))))
-        %standard-phases))))))
+        %standard-phases))))
+   (native-search-paths
+    (list (search-path-specification
+           (variable "GUIX_GTK3_PATH")
+           (files '("lib/gtk-3.0")))))))
 
 ;;;
 ;;; Guile bindings.

@@ 0,0 1,38 @@
+This patch makes GTK+ look for additional modules in a list of directories
+specified by the environment variable "GUIX_GTK3_PATH".  This can be used
+instead of "GTK_PATH" to make GTK+ find modules that are incompatible with
+other major versions of GTK+.
+
+--- a/gtk/gtkmodules.c	2015-09-20 20:09:05.060590217 +0200
++++ b/gtk/gtkmodules.c	2015-09-20 20:10:33.423124833 +0200
+@@ -52,6 +52,7 @@
+ get_module_path (void)
+ {
+   const gchar *module_path_env;
++  const gchar *module_guix_gtk3_path_env;
+   const gchar *exe_prefix;
+   gchar *module_path;
+   gchar *default_dir;
+@@ -61,6 +62,7 @@
+     return result;
+ 
+   module_path_env = g_getenv ("GTK_PATH");
++  module_guix_gtk3_path_env = g_getenv ("GUIX_GTK3_PATH");
+   exe_prefix = g_getenv ("GTK_EXE_PREFIX");
+ 
+   if (exe_prefix)
+@@ -68,7 +70,13 @@
+   else
+     default_dir = g_build_filename (_gtk_get_libdir (), "gtk-3.0", NULL);
+ 
+-  if (module_path_env)
++  if (module_guix_gtk3_path_env && module_path_env)
++    module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
++				module_guix_gtk3_path_env, module_path_env, default_dir, NULL);
++  else if (module_guix_gtk3_path_env)
++    module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
++				module_guix_gtk3_path_env, default_dir, NULL);
++  else if (module_path_env)
+     module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
+ 				module_path_env, default_dir, NULL);
+   else