[libglnx/wip/smcv/easy-constants: 4/5] backports: Backport G_OPTION_FLAG_NONE, G_OPTION_ENTRY_NULL

[Simon McVittie <smcv src gnome org>]

commit b5658723ffafa74f5feee7f3939ec652e9020c8a
Author: Simon McVittie <smcv collabora com>
Date:   Wed Jul 27 15:43:15 2022 +0100

    backports: Backport G_OPTION_FLAG_NONE, G_OPTION_ENTRY_NULL
    
    These make tables of options a bit clearer to write.
    
    Signed-off-by: Simon McVittie <smcv collabora com>

 glnx-backports.h | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/glnx-backports.h b/glnx-backports.h
index 3de9370..fd769ef 100644
--- a/glnx-backports.h
+++ b/glnx-backports.h
@@ -68,6 +68,14 @@ gboolean              glnx_set_object  (GObject **object_ptr,
 #define G_SPAWN_DEFAULT ((GSpawnFlags) 0)
 #endif
 
+#if !GLIB_CHECK_VERSION(2, 42, 0)
+#define G_OPTION_FLAG_NONE ((GOptionFlags) 0)
+#endif
+
+#if !GLIB_CHECK_VERSION(2, 70, 0)
+#define G_OPTION_ENTRY_NULL { NULL, 0, 0, 0, NULL, NULL, NULL }
+#endif
+
 #ifndef g_assert_nonnull
 #define g_assert_nonnull(x) g_assert (x != NULL)
 #endif