Boost.Python

Configuration

Introduction
Application Defined Macros
Library Defined Implementation Macros

Introduction

Boost.Python uses several configuration macros in <boost/config.hpp>, as well as configuration macros meant to be supplied by the application. These macros are documented here.

Application Defined Macros

These are the macros that may be defined by an application using Boost.Python. Note that if you extend a strict interpretation of the C++ standard to cover dynamic libraries, using different values of these macros when compiling different libraries (including extension modules and the Boost.Python library itself) is a violation of the ODR. However, we know of no C++ implementations on which this particular violation is detectable or causes any problems.

Macro	Default	Meaning
`BOOST_PYTHON_MAX_ARITY`	15	The maximum arity of any function, member function, or constructor to be wrapped, invocation of a Boost.Python function wich is specified as taking arguments `x1, x2,`...`X`n. This includes, in particular, callback mechanisms such as `object::operator()(`...`)` or `call_method<R>(`... `)`.
`BOOST_PYTHON_MAX_BASES`	10	The maximum number of template arguments to the `bases<`...`>` class template, which is used to specify the bases of a wrapped C++ class..
`BOOST_PYTHON_STATIC_MODULE`	not defined	If defined, prevents your module initialization function from being treated as an exported symbol on platforms which support that distinction in-code

Library Defined Implementation Macros

These macros are defined by Boost.Python and are implementation details of interest only to implementors and those porting to new platforms.

Macro	Default	Meaning
`BOOST_PYTHON_TYPE_ID_NAME`	not defined	If defined, this indicates that the type_info comparison across shared library boundaries does not work on this platform. In other words, if shared-lib-1 passes `typeid(T)` to a function in shared-lib-2 which compares it to `typeid(T)`, that comparison may return `false`. If this macro is #defined, Boost.Python uses and compares `typeid(T).name()` instead of using and comparing the `std::type_info` objects directly.

Revised 7 January, 2003