we don't use realpath() anymore so there is need for a special mingw include

libs/pbd/mingw64/mingw64_pbd.cc

@@ -0,0 +1,71 @@
+/*
+    Copyright (C) 2009 John Emmas
+
+    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.
+
+*/
+
+#ifdef __MINGW64__
+
+#include <WTypes.h>
+#include <glibmm.h>
+
+//***************************************************************
+//
+//	realpath()
+//
+// Emulates POSIX realpath() using Win32 _fullpath().
+//
+//	Returns:
+//
+//    On Success: A pointer to the resolved (absolute) path
+//    On Failure: NULL
+//
+
+extern "C" {
+		
+char* 
+realpath (const char *original_path, char resolved_path[_MAX_PATH+1])
+{
+char *pRet = NULL;
+bool bIsSymLink = 0; // We'll probably need to test the incoming path
+                     // to find out if it points to a Windows shortcut
+                     // (or a hard link) and set this appropriately.
+	if (bIsSymLink)
+	{
+		// At the moment I'm not sure if Windows '_fullpath()' is directly
+		// equivalent to POSIX 'realpath()' - in as much as the latter will
+		// resolve the supplied path if it happens to point to a symbolic
+		// link ('_fullpath()' probably DOESN'T do this but I'm not really
+		// sure if Ardour needs such functionality anyway). Therefore we'll
+		// possibly need to add that functionality here at a later date.
+	}
+	else
+	{
+		char temp[(MAX_PATH+1)*6]; // Allow for maximum length of a path in UTF8 characters
+
+		// POSIX 'realpath()' requires that the buffer size is at
+		// least PATH_MAX+1, so assume that the user knew this !!
+		pRet = _fullpath(temp, Glib::locale_from_utf8(original_path).c_str(), _MAX_PATH);
+		if (NULL != pRet)
+			strcpy(resolved_path, Glib::locale_to_utf8(temp).c_str());
+	}
+
+	return (pRet);
+}
+
+}
+
+#endif  // __MINGW64__