1 //  (C) Copyright John Maddock 2008.
2 //  Use, modification and distribution are subject to the
3 //  Boost Software License, Version 1.0. (See accompanying file
4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5 //
6 // The aim of this header is just to include <cmath> but to do
7 // so in a way that does not result in recursive inclusion of
8 // the Boost TR1 components if boost/tr1/tr1/cmath is in the
9 // include search path.  We have to do this to avoid circular
10 // dependencies:
11 //
12 
13 #ifndef BOOST_CONFIG_CMATH
14 #  define BOOST_CONFIG_CMATH
15 
16 #  ifndef BOOST_TR1_NO_RECURSION
17 #     define BOOST_TR1_NO_RECURSION
18 #     define BOOST_CONFIG_NO_CMATH_RECURSION
19 #  endif
20 
21 #  include <cmath>
22 
23 #  ifdef BOOST_CONFIG_NO_CMATH_RECURSION
24 #     undef BOOST_TR1_NO_RECURSION
25 #     undef BOOST_CONFIG_NO_CMATH_RECURSION
26 #  endif
27 
28 #endif
29