Author: Robert Ancell <robert.ancell@canonical.com>
Date: Wed, 10 Dec 2025 11:02:20 +1300
Subject: Fix atk_get_major_version etc not linking on C++
Origin: upstream, commit:5ae24f981ddce448682d123fd71ff20329bdd014
Applied-Upstream: 2.59.0, commit:5ae24f981ddce448682d123fd71ff20329bdd014

These failed because the version header was missing extern "C" (via
G_BEGIN_DECLS).
.
The atkversion.h header is missing G_BEGIN_DECLS/G_END_DECLS, causing
link failures when the header is included from C++ code. The version
functions (atk_get_major_version, atk_get_minor_version, etc.) are
declared without C linkage, so C++ consumers get mangled symbols that
do not match the C exports in libatk-1.

--- a/atk/atkversion.h.in
+++ b/atk/atkversion.h.in
@@ -30,6 +30,8 @@
 
 #include <glib.h>
 
+G_BEGIN_DECLS
+
 /**
  * ATK_MAJOR_VERSION:
  *
@@ -473,4 +475,6 @@ guint atk_get_interface_age (void) G_GNUC_CONST;
 #define atk_binary_age atk_get_binary_age ()
 #define atk_interface_age atk_get_interface_age ()
 
+G_END_DECLS
+
 #endif /* __ATK_VERSION_H__ */