gdk: Split out public headers listing

This is so that we can share the list with other Makefile-based build systems
to generate the enumeration sources.

gdk/Makefile.am

@@ -1,5 +1,7 @@
 ## Makefile.am for gtk+/gdk
 include $(top_srcdir)/Makefile.decl
+include gdk-pub-headers.mak
+
 -include $(INTROSPECTION_MAKEFILE)
 INTROSPECTION_GIRS =
 INTROSPECTION_SCANNER_ENV = \
@@ -63,50 +65,6 @@ LDADD = 					\
 #
 # setup source file variables
 #
-#
-# GDK header files for public installation (non-generated)
-#
-#
-gdk_public_h_sources = 				\
-	gdk.h					\
-	gdk-autocleanup.h			\
-	gdkapplaunchcontext.h			\
-	gdkcairo.h				\
-	gdkcursor.h				\
-	gdkdevice.h				\
-	gdkdevicepad.h				\
-	gdkdevicetool.h				\
-	gdkdevicemanager.h			\
-	gdkdisplay.h				\
-	gdkdisplaymanager.h			\
-	gdkdnd.h				\
-	gdkdrawingcontext.h			\
-	gdkevents.h				\
-	gdkframetimings.h			\
-	gdkglcontext.h				\
-	gdkkeys.h				\
-	gdkkeysyms.h				\
-	gdkkeysyms-compat.h			\
-	gdkmain.h				\
-	gdkmonitor.h				\
-	gdkpango.h				\
-	gdkframeclock.h				\
-	gdkpixbuf.h				\
-	gdkprivate.h				\
-	gdkproperty.h				\
-	gdkrectangle.h				\
-	gdkrgba.h				\
-	gdkscreen.h				\
-	gdkseat.h				\
-	gdkselection.h				\
-	gdktestutils.h				\
-	gdkthreads.h				\
-	gdktypes.h				\
-	gdkvisual.h				\
-	gdkwindow.h
-
-deprecated_h_sources =				\
-	deprecated/gdkcolor.h
 
 gdk_h_sources =					\
 	$(gdk_public_h_sources)			\

gdk/gdk-pub-headers.mak

@@ -0,0 +1,44 @@
+#
+# GDK header files for public installation (non-generated)
+#
+#
+gdk_public_h_sources = 				\
+	gdk.h					\
+	gdk-autocleanup.h			\
+	gdkapplaunchcontext.h			\
+	gdkcairo.h				\
+	gdkcursor.h				\
+	gdkdevice.h				\
+	gdkdevicepad.h				\
+	gdkdevicetool.h				\
+	gdkdevicemanager.h			\
+	gdkdisplay.h				\
+	gdkdisplaymanager.h			\
+	gdkdnd.h				\
+	gdkdrawingcontext.h			\
+	gdkevents.h				\
+	gdkframetimings.h			\
+	gdkglcontext.h				\
+	gdkkeys.h				\
+	gdkkeysyms.h				\
+	gdkkeysyms-compat.h			\
+	gdkmain.h				\
+	gdkmonitor.h				\
+	gdkpango.h				\
+	gdkframeclock.h				\
+	gdkpixbuf.h				\
+	gdkprivate.h				\
+	gdkproperty.h				\
+	gdkrectangle.h				\
+	gdkrgba.h				\
+	gdkscreen.h				\
+	gdkseat.h				\
+	gdkselection.h				\
+	gdktestutils.h				\
+	gdkthreads.h				\
+	gdktypes.h				\
+	gdkvisual.h				\
+	gdkwindow.h
+
+deprecated_h_sources =				\
+	deprecated/gdkcolor.h