Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

boost/config/compiler/compaq_cxx.hpp

//  (C) Copyright John Maddock 2001 - 2003. 
//  Use, modification and distribution are subject to 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)

//  See http://www.boost.org for most recent version.

//  Tru64 C++ compiler setup (now HP):

#define BOOST_COMPILER "HP Tru64 C++ " BOOST_STRINGIZE(__DECCXX_VER)

#include <boost/config/compiler/common_edg.hpp>

//
// versions check:
// Nothing to do here?