[libgweather/ebassi/gtk4] Add proper deprecation macros

[Emmanuele Bassi <ebassi src gnome org>]

commit b846ea89675428ff358dd4127f38e9988cf9a81f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Oct 11 22:46:44 2021 +0100

    Add proper deprecation macros
    
    As well as a way to disable them.

 libgweather/gweather-version.h.in | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/libgweather/gweather-version.h.in b/libgweather/gweather-version.h.in
index 7e5edd77..499af718 100644
--- a/libgweather/gweather-version.h.in
+++ b/libgweather/gweather-version.h.in
@@ -21,6 +21,21 @@
 /* Backstop for all symbols available before the introduction of versioned macros */
 #define GWEATHER_AVAILABLE_IN_ALL       _GWEATHER_EXTERN
 
+/**
+ * GWEATHER_DISABLE_DEPRECATION_WARNINGS:
+ *
+ * Disable deprecation warnings from GWeather API.
+ *
+ * Must be defined before including `libgweather/gweather.h`.
+ */
+#ifdef GWEATHER_DISABLE_DEPRECATION_WARNINGS
+# define GWEATHER_DEPRECATED _GWEATHER_EXTERN
+# define GWEATHER_DEPRECATED_FOR(f) _GWEATHER_EXTERN
+#else
+# define GWEATHER_DEPRECATED G_DEPRECATED _GWEATHER_EXTERN
+# define GWEATHER_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f) _GWEATHER_EXTERN
+#endif
+
 /**
  * SECTION:gweatherversion
  * @short_description: libgweather version checking