Hmmm... not sure why it didn't add my new files. Trying again.

libs/ptformat/ptformat/visibility.h

@@ -0,0 +1,45 @@
+/*
+    Copyright (C) 2013 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __libptformat_visibility_h__
+#define __libptformat_visibility_h__
+
+#if defined(COMPILER_MSVC)
+  #define LIBPTFORMAT_DLL_IMPORT __declspec(dllimport)
+  #define LIBPTFORMAT_DLL_EXPORT __declspec(dllexport)
+  #define LIBPTFORMAT_DLL_LOCAL
+#else
+  #define LIBPTFORMAT_DLL_IMPORT __attribute__ ((visibility ("default")))
+  #define LIBPTFORMAT_DLL_EXPORT __attribute__ ((visibility ("default")))
+  #define LIBPTFORMAT_DLL_LOCAL  __attribute__ ((visibility ("hidden")))
+#endif
+
+#ifdef LIBPTFORMAT_STATIC // libptformat is not a DLL
+  #define LIBPTFORMAT_API
+  #define LIBPTFORMAT_LOCAL
+#else
+  #ifdef LIBPTFORMAT_DLL_EXPORTS // defined if we are building the libptformat DLL (instead of using it)
+     #define LIBPTFORMAT_API LIBPTFORMAT_DLL_EXPORT
+  #else
+     #define LIBPTFORMAT_API LIBPTFORMAT_DLL_IMPORT
+  #endif 
+  #define    LIBPTFORMAT_LOCAL LIBPTFORMAT_DLL_LOCAL
+#endif
+
+#endif /* __libptformat_visibility_h__ */