gtk4 a11y: Silence loplugin:unreffun a different way

Including the `a11y.hxx` header in another source file
would result in an `--enable-werror` gcc 13.2.0-7
build on Debian testing failing like this
(real use case is in a following commit, but this is
also reproducible by including the header in
`vcl/unx/gtk4/gtkaccessibleeventlistener.cxx`):

In file included from .../vcl/unx/gtk4/gtkaccessibleeventlistener.cxx:15:
.../vcl/unx/gtk4/a11y.hxx:19:24: error: ‘void* lo_accessible_get_instance_private(LoAccessible*)’ declared ‘static’ but never defined [-Werror=unused-function]
19 | static inline gpointer lo_accessible_get_instance_private(LoAccessible*);
|                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.../vcl/unx/gtk4/a11y.hxx:21:24: error: ‘void* ooo_fixed_get_instance_private(OOoFixed*)’ declared ‘static’ but never defined [-Werror=unused-function]
21 | static inline gpointer ooo_fixed_get_instance_private(OOoFixed*);
|                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[1]: *** [.../solenv/gbuild/LinkTarget.mk:337: .../workdir/CxxObject/vcl/unx/gtk4/gtkaccessibleeventlistener.o] Error 1
make: *** [Makefile:290: build] Error 2

However, just removing the declarations would make loplugin:unreffun unhappy:

.../vcl/unx/gtk4/a11y.cxx:568:1: error: Unreferenced externally invisible function definition [loplugin:unreffun]
G_DEFINE_TYPE_WITH_CODE(LoAccessible, lo_accessible, G_TYPE_OBJECT,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:1842:56: note: expanded from macro 'G_DEFINE_TYPE_WITH_CODE'
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_)          _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:2325:3: note: expanded from macro '_G_DEFINE_TYPE_EXTENDED_BEGIN'
_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:2280:24: note: expanded from macro '_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE'
static inline gpointer \
~~~~~~~~~~~~~~~~~~~~~~~^
<scratch space>:101:1: note: expanded from here
lo_accessible_get_instance_private
^
.../vcl/unx/gtk4/a11y.cxx:857:1: error: Unreferenced externally invisible function definition [loplugin:unreffun]
G_DEFINE_TYPE_WITH_CODE(OOoFixed, ooo_fixed, GTK_TYPE_FIXED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:1842:56: note: expanded from macro 'G_DEFINE_TYPE_WITH_CODE'
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_)          _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:2325:3: note: expanded from macro '_G_DEFINE_TYPE_EXTENDED_BEGIN'
_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gtype.h:2280:24: note: expanded from macro '_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE'
static inline gpointer \
~~~~~~~~~~~~~~~~~~~~~~~^
<scratch space>:131:1: note: expanded from here
ooo_fixed_get_instance_private
^
2 errors generated.
make[1]: *** [.../solenv/gbuild/LinkTarget.mk:337: .../workdir/CxxObject/vcl/unx/gtk4/a11y.o] Error 1
make: *** [Makefile:290: build] Error 2

Silence these 2 loplugin:unreffun errors using a different
approach instead, as suggested by Stephan Bergmann in [1].

[1] https://gerrit.libreoffice.org/c/core/+/161060/comments/3e6ccbd5_87243200

Change-Id: I4c3a1c34bfaa5ac6c306881e3caff2e04d6992dd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/161060
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

2 files changed, 16 insertions, 2 deletions

diff --git a/vcl/unx/gtk4/a11y.cxx b/vcl/unx/gtk4/a11y.cxx
index 2b5e64e03947..4107c7ff0b79 100644
--- a/vcl/unx/gtk4/a11y.cxx
+++ b/vcl/unx/gtk4/a11y.cxx
@@ -565,8 +565,16 @@ static void lo_accessible_range_init(GtkAccessibleRangeInterface* iface)
 }
 #endif
 
+// silence loplugin:unreffun
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
 G_DEFINE_TYPE_WITH_CODE(LoAccessible, lo_accessible, G_TYPE_OBJECT,
                         G_IMPLEMENT_INTERFACE(GTK_TYPE_ACCESSIBLE, lo_accessible_accessible_init))
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 
 static void lo_accessible_class_init(LoAccessibleClass* klass)
 {
@@ -854,8 +862,16 @@ static void ooo_fixed_accessible_init(GtkAccessibleInterface* iface)
     //    iface->get_platform_state = get_platform_state;
 }
 
+// silence loplugin:unreffun
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
 G_DEFINE_TYPE_WITH_CODE(OOoFixed, ooo_fixed, GTK_TYPE_FIXED,
                         G_IMPLEMENT_INTERFACE(GTK_TYPE_ACCESSIBLE, ooo_fixed_accessible_init))
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 
 static void ooo_fixed_class_init(OOoFixedClass* /*klass*/) {}
 
diff --git a/vcl/unx/gtk4/a11y.hxx b/vcl/unx/gtk4/a11y.hxx
index 90711515bceb..3b2e9ce02714 100644
--- a/vcl/unx/gtk4/a11y.hxx
+++ b/vcl/unx/gtk4/a11y.hxx
@@ -16,9 +16,7 @@ struct LoAccessible;
 struct LoAccessibleClass;
 struct OOoFixed;
 struct OOoFixedClass;
-static inline gpointer lo_accessible_get_instance_private(LoAccessible*);
 GType lo_accessible_get_type();
-static inline gpointer ooo_fixed_get_instance_private(OOoFixed*);
 GtkWidget* ooo_fixed_new();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */