fixes #638 NN_EXPORT simplification
diff --git a/src/nn.h b/src/nn.h
index 031dbd6..111034e 100644
--- a/src/nn.h
+++ b/src/nn.h
@@ -1,7 +1,7 @@
/*
Copyright (c) 2012-2014 Martin Sustrik All rights reserved.
Copyright (c) 2013 GoPivotal, Inc. All rights reserved.
- Copyright 2015-2016 Garrett D'Amore <garrett@damore.org>
+ Copyright 2016 Garrett D'Amore <garrett@damore.org>
Copyright (c) 2015-2016 Jack R. Dunaway. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -35,27 +35,16 @@
#include <stdint.h>
/* Handle DSO symbol visibility. */
-#if defined NN_NO_EXPORTS
-# define NN_EXPORT
-#else
-# if defined _WIN32
-# if defined NN_STATIC_LIB
-# define NN_EXPORT extern
-# elif defined NN_SHARED_LIB
-# define NN_EXPORT __declspec(dllexport)
-# else
-# define NN_EXPORT __declspec(dllimport)
-# endif
-# else
-# if defined __SUNPRO_C
-# define NN_EXPORT __global
-# elif (defined __GNUC__ && __GNUC__ >= 4) || \
- defined __INTEL_COMPILER || defined __clang__
-# define NN_EXPORT __attribute__ ((visibility("default")))
-# else
-# define NN_EXPORT
-# endif
-# endif
+#if !defined(NN_EXPORT)
+# if defined(_WIN32) && !defined(NN_STATIC_LIB)
+# if defined NN_SHARED_LIB
+# define NN_EXPORT __declspec(dllexport)
+# else
+# define NN_EXPORT __declspec(dllimport)
+# endif
+# else
+# define NN_EXPORT extern
+# endif
#endif
/******************************************************************************/
