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
This library may now be used in "standalone" mode without the rest of the Boost C++ libraries, in order to do this you must either:
__has_include,
in this case if <boost/config.hpp> is not
present then the library will automoatically enter standalone mode. Or:
The main difference between the 2 modes, is that when Boost.Config is present the library will automatically configure itself around various compiler defects. In particular in order to use the library with exception support turned off, you will either need a copy of Boost.Config in your include path, or else manually define BOOST_NO_EXCEPTIONS when building.