<!DOCTYPE html PUBLIC
"-//W3C//DTD HTML 4.0 Transitional//EN">
<link rel=
"STYLESHEET" href=
"ext.css" type='text/css'
/>
<link rel=
"SHORTCUT ICON" href=
"../icons/pyfav.png" type=
"image/png" />
<link rel='start' href='../index.html' title='Python Documentation Index'
/>
<link rel=
"first" href=
"ext.html" title='Extending and Embedding the Python Interpreter'
/>
<link rel='contents' href='contents.html'
title=
"Contents" />
<link rel='last' href='about.html' title='About this document...'
/>
<link rel='help' href='about.html' title='About this document...'
/>
<link rel=
"next" href=
"using-cobjects.html" />
<link rel=
"prev" href=
"refcounts.html" />
<link rel=
"parent" href=
"intro.html" />
<link rel=
"next" href=
"using-cobjects.html" />
<meta name='aesop' content='information'
/>
<title>1.11 Writing Extensions in C++
<div id='top-navigation-panel' xml:id='top-navigation-panel'
>
<table align=
"center" width=
"100%" cellpadding=
"0" cellspacing=
"2">
<td class='online-navigation'
><a rel=
"prev" title=
"1.10.4 NULL Pointers"
href=
"nullPointers.html"><img src='../icons/previous.png'
border='
0' height='
32' alt='Previous Page' width='
32'
/></A></td>
<td class='online-navigation'
><a rel=
"parent" title=
"1. Extending Python with"
href=
"intro.html"><img src='../icons/up.png'
border='
0' height='
32' alt='Up One Level' width='
32'
/></A></td>
<td class='online-navigation'
><a rel=
"next" title=
"1.12 Providing a C"
href=
"using-cobjects.html"><img src='../icons/next.png'
border='
0' height='
32' alt='Next Page' width='
32'
/></A></td>
<td align=
"center" width=
"100%">Extending and Embedding the Python Interpreter
</td>
<td class='online-navigation'
><a rel=
"contents" title=
"Table of Contents"
href=
"contents.html"><img src='../icons/contents.png'
border='
0' height='
32' alt='Contents' width='
32'
/></A></td>
<td class='online-navigation'
><img src='../icons/blank.png'
border='
0' height='
32' alt='' width='
32'
/></td>
<td class='online-navigation'
><img src='../icons/blank.png'
border='
0' height='
32' alt='' width='
32'
/></td>
<div class='online-navigation'
>
<b class=
"navlabel">Previous:
</b>
<a class=
"sectref" rel=
"prev" href=
"nullPointers.html">1.10.4 NULL Pointers
</A>
<b class=
"navlabel">Up:
</b>
<a class=
"sectref" rel=
"parent" href=
"intro.html">1. Extending Python with
</A>
<b class=
"navlabel">Next:
</b>
<a class=
"sectref" rel=
"next" href=
"using-cobjects.html">1.12 Providing a C
</A>
<!--End of Navigation Panel-->
<H1><A NAME=
"SECTION0031100000000000000000"></A><A NAME=
"cplusplus"></A>
1.11 Writing Extensions in C++
It is possible to write extension modules in C++. Some restrictions
apply. If the main program (the Python interpreter) is compiled and
linked by the C compiler, global or static objects with constructors
cannot be used. This is not a problem if the main program is linked
by the C++ compiler. Functions that will be called by the
Python interpreter (in particular, module initialization functions)
have to be declared using
<code>extern
"C"</code>.
It is unnecessary to enclose the Python header files in
<code>extern
"C" {...}
</code> -- they use this form already if the symbol
"<tt class="samp
">__cplusplus</tt>" is defined (all recent C++ compilers define this
<div class='online-navigation'
>
<table align=
"center" width=
"100%" cellpadding=
"0" cellspacing=
"2">
<td class='online-navigation'
><a rel=
"prev" title=
"1.10.4 NULL Pointers"
href=
"nullPointers.html"><img src='../icons/previous.png'
border='
0' height='
32' alt='Previous Page' width='
32'
/></A></td>
<td class='online-navigation'
><a rel=
"parent" title=
"1. Extending Python with"
href=
"intro.html"><img src='../icons/up.png'
border='
0' height='
32' alt='Up One Level' width='
32'
/></A></td>
<td class='online-navigation'
><a rel=
"next" title=
"1.12 Providing a C"
href=
"using-cobjects.html"><img src='../icons/next.png'
border='
0' height='
32' alt='Next Page' width='
32'
/></A></td>
<td align=
"center" width=
"100%">Extending and Embedding the Python Interpreter
</td>
<td class='online-navigation'
><a rel=
"contents" title=
"Table of Contents"
href=
"contents.html"><img src='../icons/contents.png'
border='
0' height='
32' alt='Contents' width='
32'
/></A></td>
<td class='online-navigation'
><img src='../icons/blank.png'
border='
0' height='
32' alt='' width='
32'
/></td>
<td class='online-navigation'
><img src='../icons/blank.png'
border='
0' height='
32' alt='' width='
32'
/></td>
<div class='online-navigation'
>
<b class=
"navlabel">Previous:
</b>
<a class=
"sectref" rel=
"prev" href=
"nullPointers.html">1.10.4 NULL Pointers
</A>
<b class=
"navlabel">Up:
</b>
<a class=
"sectref" rel=
"parent" href=
"intro.html">1. Extending Python with
</A>
<b class=
"navlabel">Next:
</b>
<a class=
"sectref" rel=
"next" href=
"using-cobjects.html">1.12 Providing a C
</A>
<span class=
"release-info">Release
2.4.2, documentation updated on
28 September
2005.
</span>
<!--End of Navigation Panel-->
See
<i><a href=
"about.html">About this document...
</a></i> for information on suggesting changes.