new file mode 100644
@@ -0,0 +1,43 @@
+From ac4a07e7ef3d9d046a4ca2a803c5b649b6f7ddf4 Mon Sep 17 00:00:00 2001
+From: Matt Turner <mattst88@gmail.com>
+Date: Sat, 8 Jul 2023 00:01:07 -0400
+Subject: [PATCH] window: Fix function callback definition
+
+Without this, the build fails with clang with
+CFLAGS=-Werror=incompatible-function-pointer-types
+
+```
+../src/font-view-window.c:864:77: error: incompatible function pointer types passing 'void (FontViewWindow *)' (aka 'void (struct _FontViewWindow *)') to parameter of type 'GtkWidgetActionActivateFunc' (aka 'void (*)(struct _GtkWidget *, const char *, struct _GVariant *)') [-Wincompatible-function-pointer-types]
+ gtk_widget_class_install_action (widget_class, "win.toggle-search", NULL, action_toggle_search_cb);
+ ^~~~~~~~~~~~~~~~~~~~~~~
+/usr/include/gtk-4.0/gtk/gtkwidget.h:956:87: note: passing argument to parameter 'activate' here
+ GtkWidgetActionActivateFunc activate);
+ ^
+```
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/gnome-font-viewer/-/merge_requests/54]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/font-view-window.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/font-view-window.c b/src/font-view-window.c
+index 639ac33..24461f7 100644
+--- a/src/font-view-window.c
++++ b/src/font-view-window.c
+@@ -758,8 +758,11 @@ font_view_window_show_overview (FontViewWindow *self)
+ }
+
+ static void
+-action_toggle_search_cb (FontViewWindow *self)
++action_toggle_search_cb (GtkWidget *widget,
++ const char *action_name,
++ GVariant *parameter)
+ {
++ FontViewWindow *self = FONT_VIEW_WINDOW (widget);
+
+ gtk_toggle_button_set_active (self->search_button,
+ !gtk_toggle_button_get_active (self->search_button));
+--
+2.45.1
+
@@ -15,6 +15,7 @@ inherit gnomebase gtk-icon-cache gettext features_check mime-xdg
REQUIRED_DISTRO_FEATURES = "x11 opengl"
+SRC_URI += "file://0001-window-Fix-function-callback-definition.patch"
SRC_URI[archive.sha256sum] = "592f401e485d02cc044d487bb5c8e04c961da6856216768a59f1ff98bd2d537c"
FILES:${PN} += " \
Signed-off-by: Khem Raj <raj.khem@gmail.com> --- ...dow-Fix-function-callback-definition.patch | 43 +++++++++++++++++++ .../gnome-font-viewer_46.0.bb | 1 + 2 files changed, 44 insertions(+) create mode 100644 meta-gnome/recipes-gnome/gnome-font-viewer/gnome-font-viewer/0001-window-Fix-function-callback-definition.patch