Compilation fixes. Added tests to verify headers correctness.

test/compile/windows_h_header.cpp

@@ -0,0 +1,33 @@
+/*
+ *             Copyright Andrey Semashev 2015.
+ * Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *          http://www.boost.org/LICENSE_1_0.txt)
+ */
+/*!
+ * \file   windows_h_header.cpp
+ * \author Andrey Semashev
+ * \date   21.06.2015
+ *
+ * \brief  This file contains a test boilerplate for checking that every public header does not conflict with native windows.h.
+ */
+
+// NOTE: Use Boost.Predef, the most fine graned header to detect Windows. This header should not include anything
+//       system- or STL-specific so that the check for Boost.WinAPI header self-sufficiency is not subverted.
+//       Boost.Config does not satisfy this requirement.
+#include <boost/predef/os/windows.h>
+
+#if BOOST_OS_WINDOWS
+
+#include <windows.h>
+
+#define BOOST_WINAPI_TEST_INCLUDE_HEADER() <boost/detail/BOOST_WINAPI_TEST_HEADER>
+
+#include BOOST_WINAPI_TEST_INCLUDE_HEADER()
+
+#endif // BOOST_OS_WINDOWS
+
+int main(int, char*[])
+{
+    return 0;
+}