[PATCH 1/2] gnu: gtk+-2: Add patch to support GUIX_GTK2_IM_MODULE_FILE.

[Ricardo Wurmus]

* gnu/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch: New file.
* gnu/packages/gtk.scm (gtk+-2)[source]: Add it.
* gnu/local.mk (dist_patch_DATA): Add it.
---
 gnu/local.mk                                              |  1 +
 gnu/packages/gtk.scm                                      |  1 +
 .../patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch   | 15 +++++++++++++++
 3 files changed, 17 insertions(+)
 create mode 100644 
gnu/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index b8c5378..3cb85d1 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -550,6 +550,7 @@ dist_patch_DATA =                                           
\
   %D%/packages/patches/guile-relocatable.patch                 \
   %D%/packages/patches/guile-rsvg-pkgconfig.patch              \
   %D%/packages/patches/gtk2-respect-GUIX_GTK2_PATH.patch       \
+  %D%/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch \
   %D%/packages/patches/gtk2-theme-paths.patch                  \
   %D%/packages/patches/gtk3-respect-GUIX_GTK3_PATH.patch       \
   %D%/packages/patches/gtkglext-disable-disable-deprecated.patch \
diff --git a/gnu/packages/gtk.scm b/gnu/packages/gtk.scm
index 8feac11..e1d9cf9 100644
--- a/gnu/packages/gtk.scm
+++ b/gnu/packages/gtk.scm
@@ -563,6 +563,7 @@ is part of the GNOME accessibility project.")
              (base32
               "0l6aqk86aw5w132ygy6hv6nlxvd1h6xg7c85qbm60p6mnv1ww58d"))
             (patches (search-patches "gtk2-respect-GUIX_GTK2_PATH.patch"
+                                     
"gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch"
                                      "gtk2-theme-paths.patch"))))
    (build-system gnu-build-system)
    (outputs '("out" "doc"))
diff --git a/gnu/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch 
b/gnu/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch
new file mode 100644
index 0000000..f399024
--- /dev/null
+++ b/gnu/packages/patches/gtk2-respect-GUIX_GTK2_IM_MODULE_FILE.patch
@@ -0,0 +1,15 @@
+This patch replaces the environment variable "GTK_IM_MODULE" with
+"GUIX_GTK2_IM_MODULE_FILE" to prevent this version of GTK+ from loading input
+method modules for other major versions of GTK+.
+
+--- gtk+-2.24.30/gtk/gtkrc.c   2016-08-21 22:40:22.339660438 +0200
++++ gtk+-2.24.30/gtk/gtkrc.c   2016-08-23 10:11:11.080822710 +0200
+@@ -439,7 +439,7 @@
+ gchar *
+ gtk_rc_get_im_module_file (void)
+ {
+-  const gchar *var = g_getenv ("GTK_IM_MODULE_FILE");
++  const gchar *var = g_getenv ("GUIX_GTK2_IM_MODULE_FILE");
+   gchar *result = NULL;
+ 
+   if (var)
-- 
2.9.2