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## Configuring and building the library

TypeIndex is a header only library and it does not use Boost libraries that require building. You just need to `#include <boost/type_index.hpp>` to start using it.

The library supports a number of configuration macros, defining which require full rebuild of all the projects that use TypeIndex:

Table 41.1. Configuration macros

Macro name | Short description
--- | ---
`BOOST_TYPE_INDEX_USER_TYPEINDEX` | Macro that allows you to use your own implementation of TypeIndex instead of the default all around the projects and libraries.
`BOOST_TYPE_INDEX_FORCE_NO_RTTI_COMPATIBILITY` | Macro that must be defined if you are mixing RTTI-on and RTTI-off.
`BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING` and `BOOST_TYPE_INDEX_FUNCTION_SIGNATURE` | Macros that allow you to specify parsing options and type name generating macro for RTTI-off cases.

You can define configuration macros in the `bjam` command line using one of the following approaches:

        b2 variant=release define=BOOST_TYPE_INDEX_FORCE_NO_RTTI_COMPATIBILITY stage

        b2 variant=release "define=BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING='(39, 1, true, \"T = \")'" stage

However, it may be more convenient to define configuration macros in the "boost/config/user.hpp" file in order to automatically define them both for the library and user's projects.