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#pragma section-numbers off = Building Extensions with boost.python = == Using bjam == bjam is a standard tool for building boost library itself. Thus it is preferable way to build Python extensions based on ["boost.python"] with bjam. Basic example listed in [http://www.boost.org/libs/python/doc/tutorial/doc/html/python/hello.html tutorial]. However if you want to add external libraries in your extension (that is why you use boost.python, isn't it?), you must add them to the '''Jamfile''': {{{ # NOTE: Change [[VARIABLES]] according to your system # Specify our location in the boost project hierarchy subproject libs/python/MyExtension ; ######## if you put your dir in boost hierarchy # Include definitions needed for Python modules SEARCH on python.jam = $(BOOST_BUILD_PATH) ; include python.jam ; # Declare a Python extension extension Example : # sources Example.cpp # dependencies <dll>../build/boost_python : # requirements <include>[[FULL_PATH_INCLUDE_DIR]] <include>[[RELATIVE_PATH_INCLUDE_DIR]] <library-file>[[FULL_PATH_AND_LIBNAME]] <library-path>[[PATH_TO_LIB]] <library-file>[[LIBNAME]] ; # Declare a test for the extension module boost-python-runtest test1 : # Python test driver test1.py # extension modules to use <pyd>Example ; }}} Keeping your projects under boost hierarchy is often inconvenient. You may build your extension from any place by: * changing the line {{{subproject}}} in the '''Jamfile''' to the {{{ project-root ; }}} * remove <dll> line and add to the requirements: {{{ # link to the appropriate library for the build variant. <release><find-library>boost_python <debug><find-library>boost_python_debug <debug-python><find-library>boost_python_pydebug # library path required for linking to boost_python shared lib. You # may need to edit this for your installation <library-path>$(BOOST_ROOT)/libs/python/build/VisualStudio/bin }}} * creating '''boost-build.jam''' file in the root of your project tree like that: {{{ BOOST_ROOT=[[PATH_TO_BOOST]] ; boost-build $(BOOST_ROOT)/tools/build ; }}} * to silence warning create empty '''Jamrules''' file. == Using make == * Make sure to link with ''boost_python'' or ''boost_python_debug'' library. == Using SCons == You might want to try [http://www.scons.org scons]. It's really easy to build python extensions with scons. Here is an example that would build uvector.so: {{{ BOOST_VERSION = 'boost.cvs' BOOST = '/usr/local/src/' + BOOST_VERSION BOOSTLIBPATH = BOOST+'/stage/lib' env = Environment (LIBPATH=['./',BOOSTLIBPATH], CPPPATH=[BOOST, '/usr/include/python2.3'], RPATH=['./',BOOSTLIBPATH]) env.SharedLibrary (target='uvector', source='uvector.cc', SHLIBPREFIX='', LIBS=[BOOST_PYTHON_LIB]) }}} == Using Windows IDE == * Make sure you keep {{{"Use Managed Extension" == No}}} if you are using Visual Studio.NET. = Tips and tricks = To keep up with bjam rules you might want to have a ''dry'' run without actually building anything: {{{bjam -na }}} ------ To copy resulting executable to desired directory take a look at the '''stage''' rule. ------ To specify library in a platform-independent way you could do something like: {{{ local libname if $(NT) { libname = foo.lib } else { libname = libfoo.a } ... <library-file>$(libname) }}} in the Jamfile. ------ Add -DBOOST_PYTHON_STATIC_LIB to your compiler command-line or <define>BOOST_PYTHON_STATIC_LIB to your bjam requirements; that will turn off exporting for win32: `__declspec(dllexport)`. ------ If you are getting '''error C1055: compiler limit : out of keys''' on MS VisualC, try change /ZI (Program database for edit and continue) to /Zi (Program database). ------ If you are getting error '''error C1076: compiler limit - internal heap limit reached''' try add /ZmNNN (with NNN=300..800) |
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