From 305804144c7b7827f96e5f6a727b22461e51abba Mon Sep 17 00:00:00 2001
From: Lukasz Forynski <lukasz.forynski@gmail.com>
Date: Tue, 22 Aug 2017 15:25:52 +0100
Subject: [PATCH] Fix for #131 initModule symbol not visible in 1.64

If a global visibility is set to 'hidden', importing modules that define classes without either 'noimport' or 'init' causes
errors like:
`ImportError: dynamic module does not define init function`

This seems to be due to some, probably unintended changes from #1.
---
 include/boost/python/object/instance.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/python/object/instance.hpp b/include/boost/python/object/instance.hpp
index 27b91a1e5f..ffc6511909 100644
--- a/include/boost/python/object/instance.hpp
+++ b/include/boost/python/object/instance.hpp
@@ -18,7 +18,7 @@ namespace boost { namespace python { namespace objects {
 
 // Each extension instance will be one of these
 template <class Data = char>
-struct instance
+struct BOOST_PYTHON_DECL instance
 {
     PyObject_VAR_HEAD
     PyObject* dict;