[Buildroot] [PATCH 1/1] package/libgtk4: enable introspection when gobject-introspection is enabled

libgtk4 passes -Dintrospection=disabled unconditionally, so Gtk-4.0.gir is
never installed. webkitgtk depends on gobject-introspection and generates
WebKit-6.0.gir, which includes Gtk-4.0.gir, so building both fails:

  FAILED: WebKit-6.0.gir
  Couldn't find include 'Gtk-4.0.gir' (search path:
  '['.../usr/share/gir-1.0', ...]')

Tie the option to BR2_PACKAGE_GOBJECT_INTROSPECTION and add the dependency,
the way package/libgtk3 already does. Systems without introspection keep the
previous behaviour.

Signed-off-by: Alsey Coleman Miller <[email protected]>
---
 package/libgtk4/libgtk4.mk | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/package/libgtk4/libgtk4.mk b/package/libgtk4/libgtk4.mk
index 0d86835609..9a5ed651a8 100644
--- a/package/libgtk4/libgtk4.mk
+++ b/package/libgtk4/libgtk4.mk
@@ -34,11 +34,17 @@ LIBGTK4_CONF_OPTS = \
 	-Dsysprof=disabled \
 	-Dtracker=disabled \
 	-Dcolord=disabled \
-	-Dintrospection=disabled \
 	-Ddocumentation=false \
 	-Dscreenshots=false \
 	-Dman-pages=false
 
+ifeq ($(BR2_PACKAGE_GOBJECT_INTROSPECTION),y)
+LIBGTK4_CONF_OPTS += -Dintrospection=enabled
+LIBGTK4_DEPENDENCIES += gobject-introspection
+else
+LIBGTK4_CONF_OPTS += -Dintrospection=disabled
+endif
+
 ifeq ($(BR2_PACKAGE_LIBGTK4_X11),y)
 LIBGTK4_DEPENDENCIES += xlib_libXcursor xlib_libXi xlib_libXinerama
 LIBGTK4_CONF_OPTS += -Dx11-backend=true
-- 
2.47.3

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