Mailman 3 March 2005 - Cplusplus-sig

linker problems with boost.build and C++ embedding
by Daniel Holth March 20, 2005

March 20, 2005

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 In gentoo Linux I have edited my code, but have not subtracted from the linker options at all, now a module imported into my embedded Python environment cannot find symbols from the Python library. ImportError: /usr/lib/python2.3/site-packages/_mysql.so: undefined symbol: PyType_GenericNew I have no idea why this is happening, I just know I've had the same problem with dynamic shared objects before. Can anyone here tell me what the issue might be? It was importing just fine, and then I added another static library and edited some code, now my embedded Python code can't import. Thanks, Daniel Holth -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCPMXkVh4W2pVfoMsRAtWQAJ9qKQmMi77RREZKuzrAwsg0juqIDQCg8OI+ yfl6aFVPOidpxQALAD8YGrk= =oLJq -----END PGP SIGNATURE-----

1 0

how to access live c++ object?
by ��[Դ��֮��] March 18, 2005

March 18, 2005

This is my class class CT { public: CT() {}; ~CT() {}; int GetNum( void ) { return num; } void SetNum( int n ) { num = n; } private: int num; }; static CT ct; CT & getCT( void ) { return ct; } I want to access ct object from boost.python, thanks for your advice.

3 6

Re: [C++-sig] Re: a working example of wrapping an instantiated c++ object
by Yao Heling March 17, 2005

March 17, 2005

Ok, I'll try to write a small tutorial for this. I'll post it here when it's ready. Thanks for your help, Joseph __________________________________ Do you Yahoo!? The all-new My Yahoo! - What will yours do? http://my.yahoo.com

2 1

Boost.Python: An attempt compile with Borland
by Michal Kandulski March 16, 2005

March 16, 2005

Hi, Is anyone interested in making Boost.Python compile with Borland? Has anyone tried to do it? Is there any reason for which it is impossible? Im rather new to Boost.Python although quite experienced in C++. I've read the tutorial and I like the project very much. I've also tried some of the examples with mingw. Unfortunately I'm using the Borland compiler and this is something I can't change :-(. I know the library won't compile with Borland because of it's poor template implementation (and lots of other bugs). But... I tried to make it compile and I'm almost (99%) successful. All the cpp's get compiled. But... it simply does'n work because of some compiler features (differences), either in compiletime or in runtime. HELP! Michal

1 0

A few questions about embedding python
by Colin Goudie March 16, 2005

March 16, 2005

I'm using boost 1.32.0 with python 2.4 When I compile I get the python libraries created at boost\bin\boost\libs\python\build\ with the static library at boost\bin\boost\libs\python\build\libboost_python.lib\vc-7_1\debug\threading-multi\libboost_python-vc71-mt-gd-1_32.lib and the dynamic at boost\bin\boost\libs\python\build\boost_python.dll\vc-7_1\debug\threading-multi\boost_python-vc71-mt-gd-1_32.lib When I'm linking my program if I link against the static (Because I thought you had to do that for embedding) I get lots of unresolved external symbols that seem to come from boosts python library. If I link instead to the lib that belongs to the dll, and place the dll in with my exe it runs fine. ?? Do I need static linking on windows for embedding? The other question is with regards to exposing c++ classes to a python script loaded from a file. I have something like this in my c++ code BOOST_PYTHON_MODULE(truckstate) { class_<TruckState>("TruckState") .def("goLoading", &TruckState::goLoading) .def("gowaiting", &TruckState::goWaiting); } In my python script when I try to import truckstate I get an exception thrown saying it can't find the module truckstate Most of the examples I've seen importing c++ classes are when they are extending python not embedding. Do I need to use Python C/API to import my truckstate module or something?? Thanks

2 1

Boost.Python: AllFromHeader
by Christopher Mason March 15, 2005

March 15, 2005

Hello. Pyste is exceptionally cool. A quick question: AllFromHeader says: AllFromHeader is not working in all cases in the current version. (This is in boost_1_32_0.) Could someone please expound on this? Stay away completely? Use with caveats? I've noticed that things seem to not be in the right order (like Base->Derived dependencies). Is this part of the problem? Thanks, -c -- [ Christopher Mason MPRC Bioinformatics cjm37(a)exrch.mayo.edu ]

2 1

Re: [C++-sig] Sorry for my absence
by David Abrahams March 14, 2005

March 14, 2005

Nick Rasmussen <nick(a)ilm.com> writes: > In case you missed this thread: > > http://thread.gmane.org/gmane.comp.python.c++/7596 > > Do you have any opinion on this patch: > > http://article.gmane.org/gmane.comp.python.c%2B%2B/7633 Do all the Boost.Python tests pass? Are you certain it's okay to use PyCFunction_Type as a base class even though PyFunctionObject isn't layout-compatible with boost::python::objects::function? If you can answer yes to both of those questions, and explain your answer to the second one, then we can integrate your patch. -- Dave Abrahams Boost Consulting www.boost-consulting.com

5 9

xbase-2.0.0 bindings for python
by jim March 14, 2005

March 14, 2005

Sirs: I have bindings for the xbase2.0.0 c++ library with the sip files and a wrapper class in python available if anyone is interested. I would appreciate suggestions for where and how to let folks know that this is available if this isn't the proper format and forum. Jim Hurlburt Yakima, WA

1 0

urgent!!
by Satendra Pratap March 13, 2005

March 13, 2005

Hi 2 all, Can this group help me in implementing a new C++ library for Sparc Architecture for Nucleus RTOS... Plz reply soon... Thankyou in Advance.... Satendra...

1 0

Problem in 1.32 in 'boost::python::range' (works in 1.31)
by Mike March 13, 2005

March 13, 2005

The attached code with error message is a simplified version of code that compiles in MSVC 7.1, boost_1_31, but fails to compile in 1_32. This post is based on one I sent nearly a month ago. My apologies for re-sending it, but when I saw that maybe David Abrahams had missed some, I'd thought I'd try again. Please excuse me David if you have in fact already read it. Regards, Mike

2 2