[calls] project: Do not allow deprecated gtk/gdk symbols

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 2026573e642678b1698e3c5ad36ccd9e18ae3ffa
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Fri Nov 26 06:48:08 2021 +0100

    project: Do not allow deprecated gtk/gdk symbols
    
    This will make sure that we're not introducing deprecated symbols which
    could make it harder to migrate to Gtk4.

 meson.build | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/meson.build b/meson.build
index 0cf3b104..6832e32a 100644
--- a/meson.build
+++ b/meson.build
@@ -106,6 +106,9 @@ test_c_args = [
   '-DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_70',
   # see https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/332
   '-DEDS_DISABLE_DEPRECATED',
+  # in preparation for the switch to Gtk4 we should make sure not to use deprecated symbols
+  '-DGDK_DISABLE_DEPRECATED',
+  '-DGTK_DISABLE_DEPRECATED',
 ]
 
 if get_option('buildtype') != 'plain'