From c97ef81a10a67fbc52bcbf496e64d30d1ae3d196 Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Tue, 18 Apr 2017 14:28:46 +0100
Subject: [PATCH] build: Add missing symbol visibility flags

GTK symbols are not visible by default, and only the ones annotated with
_GDK_EXTERN (and wrapper macros) are exported. We need to define
_GDK_EXTERN during the configuration, depending on the platform and
compiler we use.
---
 meson.build | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/meson.build b/meson.build
index 54ce3c7afb..36b8001fa7 100644
--- a/meson.build
+++ b/meson.build
@@ -255,6 +255,22 @@ foreach cflag: test_cflags
   endif
 endforeach
 
+# Symbol visibility
+if get_option('default_library') != 'static'
+  if host_machine.system() == 'windows'
+    cdata.set('DLL_EXPORT', true)
+    if cc.get_id() == 'msvc'
+      cdata.set('_GDK_EXTERN', '__declspec(dllexport) extern')
+    else
+      cdata.set('_GDK_EXTERN', '__attribute__((visibility("default"))) __declspec(dllexport) extern')
+      common_cflags += ['-fvisibility=hidden']
+    endif
+  else
+    cdata.set('_GDK_EXTERN', '__attribute__((visibility("default"))) extern')
+    common_cflags += ['-fvisibility=hidden']
+  endif
+endif
+
 confinc = include_directories('.')
 gdkinc = include_directories('gdk')
 gtkinc = include_directories('gtk')