10 files changed, 20 insertions, 22 deletions
diff --git a/demos/gtk-demo/listview_colors.c b/demos/gtk-demo/listview_colors.c
index b7a5c567fa..bc01d83eaf 100644
--- a/demos/gtk-demo/listview_colors.c
+++ b/demos/gtk-demo/listview_colors.c
@@ -11,6 +11,8 @@
 
 #include <gtk/gtk.h>
 
+#include <stdlib.h>
+
 #define GTK_TYPE_COLOR (gtk_color_get_type ())
 G_DECLARE_FINAL_TYPE (GtkColor, gtk_color, GTK, COLOR, GObject)
 
diff --git a/demos/gtk-demo/listview_settings.c b/demos/gtk-demo/listview_settings.c
index 3e86e18346..e5908047b3 100644
--- a/demos/gtk-demo/listview_settings.c
+++ b/demos/gtk-demo/listview_settings.c
@@ -9,6 +9,8 @@
 
 #include <gtk/gtk.h>
 
+#include <stdlib.h>
+
 /* Create an object that wraps GSettingsSchemaKey because that's a boxed type */
 typedef struct _SettingsKey SettingsKey;
 struct _SettingsKey
diff --git a/meson.build b/meson.build
index a8a3c7cdbe..8eab52925a 100644
--- a/meson.build
+++ b/meson.build
@@ -286,15 +286,19 @@ endif
 common_cflags = cc.get_supported_arguments(test_cflags)
 
 # Symbol visibility
+
+if os_win32
+  visibility_define = '__declspec(dllexport) extern'
+else
+  visibility_define = '__attribute__((visibility("default"))) extern'
+endif
+
 if get_option('default_library') != 'static'
+  cdata.set('_GDK_EXTERN', visibility_define)
   if os_win32
     cdata.set('DLL_EXPORT', true)
-    cdata.set('_GDK_EXTERN', '__declspec(dllexport) extern')
-    if cc.get_id() != 'msvc'
-      common_cflags += ['-fvisibility=hidden']
-    endif
-  else
-    cdata.set('_GDK_EXTERN', '__attribute__((visibility("default"))) extern')
+  endif
+  if cc.get_id() != 'msvc'
     common_cflags += ['-fvisibility=hidden']
   endif
 endif
diff --git a/modules/media/gtkgstmediafile.c b/modules/media/gtkgstmediafile.c
index 5988ef38c3..b094796fd5 100644
--- a/modules/media/gtkgstmediafile.c
+++ b/modules/media/gtkgstmediafile.c
@@ -97,7 +97,6 @@ G_DEFINE_TYPE_EXTENDED (GtkGstMediaFile, gtk_gst_media_file, GTK_TYPE_MEDIA_FILE
                         G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
                                                gtk_gst_media_file_paintable_init))
 
-G_MODULE_EXPORT
 void
 g_io_module_load (GIOModule *module)
 {
@@ -109,7 +108,6 @@ g_io_module_load (GIOModule *module)
                                   10);
 }
 
-G_MODULE_EXPORT
 G_GNUC_NORETURN
 void
 g_io_module_unload (GIOModule *module)
@@ -117,7 +115,6 @@ g_io_module_unload (GIOModule *module)
   g_assert_not_reached ();
 }
 
-G_MODULE_EXPORT
 char **
 g_io_module_query (void)
 {
diff --git a/modules/media/meson.build b/modules/media/meson.build
index c6dbed1f26..59124d3154 100644
--- a/modules/media/meson.build
+++ b/modules/media/meson.build
@@ -23,7 +23,11 @@ endif
 media_subdir = 'gtk-4.0/@0@/media'.format(gtk_binary_version)
 media_install_dir = join_paths(get_option('libdir'), media_subdir)
 
-extra_c_args = ['-DGTK_COMPILATION']
+extra_c_args = [
+  '-DGTK_COMPILATION',
+  '-D_GLIB_EXTERN=@0@'.format(visibility_define),
+]
+
 extra_c_args += common_cflags
 
 if media_backends.contains('ffmpeg')
diff --git a/modules/printbackends/gtkprintbackendcloudprint.c b/modules/printbackends/gtkprintbackendcloudprint.c
index 99dc5f3665..6a5d7755af 100644
--- a/modules/printbackends/gtkprintbackendcloudprint.c
+++ b/modules/printbackends/gtkprintbackendcloudprint.c
@@ -103,7 +103,6 @@ void                 t_goa_account_free                 (gpointer data);
 
 G_DEFINE_DYNAMIC_TYPE (GtkPrintBackendCloudprint, gtk_print_backend_cloudprint, GTK_TYPE_PRINT_BACKEND)
 
-G_MODULE_EXPORT
 void
 g_io_module_load (GIOModule *module)
 {
@@ -119,13 +118,11 @@ g_io_module_load (GIOModule *module)
                                   10);
 }
 
-G_MODULE_EXPORT
 void
 g_io_module_unload (GIOModule *module)
 {
 }
 
-G_MODULE_EXPORT
 char **
 g_io_module_query (void)
 {
diff --git a/modules/printbackends/gtkprintbackendcups.c b/modules/printbackends/gtkprintbackendcups.c
index 58dd95bbbe..893ced4c16 100644
--- a/modules/printbackends/gtkprintbackendcups.c
+++ b/modules/printbackends/gtkprintbackendcups.c
@@ -236,7 +236,6 @@ static void                 secrets_service_vanished_cb             (GDBusConnec
 
 G_DEFINE_DYNAMIC_TYPE(GtkPrintBackendCups, gtk_print_backend_cups, GTK_TYPE_PRINT_BACKEND)
 
-G_MODULE_EXPORT
 void
 g_io_module_load (GIOModule *module)
 {
@@ -251,13 +250,11 @@ g_io_module_load (GIOModule *module)
                                   10);
 }
 
-G_MODULE_EXPORT
 void
 g_io_module_unload (GIOModule *module)
 {
 }
 
-G_MODULE_EXPORT
 char **
 g_io_module_query (void)
 {
diff --git a/modules/printbackends/gtkprintbackendfile.c b/modules/printbackends/gtkprintbackendfile.c
index 3486805688..071ebec359 100644
--- a/modules/printbackends/gtkprintbackendfile.c
+++ b/modules/printbackends/gtkprintbackendfile.c
@@ -102,7 +102,6 @@ static GtkPageSetup *       file_printer_get_default_page_size     (GtkPrinter
 
 G_DEFINE_DYNAMIC_TYPE(GtkPrintBackendFile, gtk_print_backend_file, GTK_TYPE_PRINT_BACKEND)
 
-G_MODULE_EXPORT
 void
 g_io_module_load (GIOModule *module)
 {
@@ -116,13 +115,11 @@ g_io_module_load (GIOModule *module)
                                   10);
 }
 
-G_MODULE_EXPORT
 void
 g_io_module_unload (GIOModule *module)
 {
 }
 
-G_MODULE_EXPORT
 char **
 g_io_module_query (void)
 {
diff --git a/modules/printbackends/gtkprintbackendlpr.c b/modules/printbackends/gtkprintbackendlpr.c
index 0626e594fa..cef1501c30 100644
--- a/modules/printbackends/gtkprintbackendlpr.c
+++ b/modules/printbackends/gtkprintbackendlpr.c
@@ -83,7 +83,6 @@ static void                 gtk_print_backend_lpr_print_stream    (GtkPrintBacke
 
 G_DEFINE_DYNAMIC_TYPE (GtkPrintBackendLpr, gtk_print_backend_lpr, GTK_TYPE_PRINT_BACKEND)
 
-G_MODULE_EXPORT
 void
 g_io_module_load (GIOModule *module)
 {
@@ -97,13 +96,11 @@ g_io_module_load (GIOModule *module)
                                   10);
 }
 
-G_MODULE_EXPORT
 void
 g_io_module_unload (GIOModule *module)
 {
 }
 
-G_MODULE_EXPORT
 char **
 g_io_module_query (void)
 {
diff --git a/modules/printbackends/meson.build b/modules/printbackends/meson.build
index 643a8ba888..40a9379b47 100644
--- a/modules/printbackends/meson.build
+++ b/modules/printbackends/meson.build
@@ -68,6 +68,7 @@ printbackends_args = [
   '-DGTK_COMPILATION',
   '-DGTK_DISABLE_DEPRECATION_WARNINGS',
   '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
+  '-D_GLIB_EXTERN=@0@'.format(visibility_define),
 ] + common_cflags
 
 if print_backends.contains('cups')