gtk3-x11: fix build

[jtojnar]

Motivation for this change

Closes: #54424, #54642

cc @matthewbauer @LnL7 @hedning

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

---

[jtojnar]

I opened a PR upstream https://gitlab.gnome.org/GNOME/gtk/merge_requests/536

I also came up with a more proper fix but cannot really test it:

--- a/gdk/x11/gdkapplaunchcontext-x11.c
+++ b/gdk/x11/gdkapplaunchcontext-x11.c
@@ -26,10 +26,13 @@
 #include "gdkintl.h"
 #include "gdkprivate-x11.h"
 
-#include <glib.h>
-#if defined(HAVE_GIO_UNIX) && !defined(__APPLE__)
+#if defined(HAVE_GIO_UNIX)
+if defined(__APPLE__)
+#include <gio/gosxappinfo.h>
+#else
 #include <gio/gdesktopappinfo.h>
 #endif
+#endif
 
 #include <string.h>
 #include <unistd.h>
@@ -354,13 +357,19 @@
   else
     workspace_str = NULL;
 
-#if defined(HAVE_GIO_UNIX) && !defined(__APPLE__)
+#if defined(HAVE_GIO_UNIX)
+#if defined(__APPLE__)
+  if (G_IS_OSX_APP_INFO (info))
+    application_id = g_osx_app_info_get_id (G_OSX_APP_INFO (info));
+  else
+    application_id = NULL;
+#else
   if (G_IS_DESKTOP_APP_INFO (info))
     application_id = g_desktop_app_info_get_filename (G_DESKTOP_APP_INFO (info));
   else
     application_id = NULL;
+#endif
 #else
-  application_id = NULL;
 #warning Please add support for creating AppInfo from id for your OS
 #endif
 

[jtojnar]

We need a similar patch for

• gtk2 https://gitlab.gnome.org/GNOME/gtk/blob/gtk-2-24/gdk/x11/gdkapplaunchcontext-x11.c#L29
• pygobject2 https://gitlab.gnome.org/GNOME/pygobject/blob/pygobject-2-18/gio/unix.override