Compiling meshgen (PandaAI) for os x

Compiling or Editing the Panda Source
1

Has anyone compiled the navigation mesh tool for OS X? Is this even supported?

My attempts so far fail with the following dump:

Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ g++ meshgen.cxx -o meshgen.o  -fPIC -02 -arch i386 -I /Developer/Panda3D/include -I /usr/include/python2.6
Undefined symbols for architecture i386:
  "TypeRegistry::ptr()", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccgA4xXH.o
  "TypeRegistry::register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccgA4xXH.o
  "TypeRegistry::record_derivation(TypeHandle, TypeHandle)", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccgA4xXH.o
  "TypedObject::init_type()", referenced from:
      Socket_IP::init_type()     in ccgA4xXH.o
  "TypedObject::~TypedObject()", referenced from:
      Socket_IP::~Socket_IP()in ccgA4xXH.o
      Socket_IP::~Socket_IP()in ccgA4xXH.o
  "Notify::ptr()", referenced from:
      BitMask<unsigned int, 32>::set_bit(int)in ccgA4xXH.o
  "Notify::assert_failure(char const*, int, char const*)", referenced from:
      BitMask<unsigned int, 32>::set_bit(int)in ccgA4xXH.o
  "MeshGenerator::MeshGenerator(char const*, char const*)", referenced from:
      _main in ccgA4xXH.o
  "typeinfo for TypedObject", referenced from:
      typeinfo for Socket_IPin ccgA4xXH.o
  "TypedObject::_type_handle", referenced from:
      TypedObject::get_class_type()       in ccgA4xXH.o
  "_memory_hook", referenced from:
      MemoryBase::operator delete(void*)in ccgA4xXH.o
  "Socket_IP::_type_handle", referenced from:
      Socket_IP::get_class_type()      in ccgA4xXH.o
      Socket_IP::init_type()     in ccgA4xXH.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$

Anyone have pointers? Thanks in advance!

2

Like any C++ code, you will have to link with the appropriate library files to define all of the missing symbols. That means adding -L /Developer/Panda3D/lib to the command line, and whatever library names you need; based on the error messages you quote, I think this will be at least -lexpress -lnativenet -lprc -ldtoolutil . And maybe some others. I don’t know where MeshGenerator is defined; I guess that’s part of PandaAI? So you’ll need to add those libraries too.

David

3

Hi drwr,

Thanks as always for the prompt reply! From this page:

panda3d.org/manual/index.php … n_Mac_OS_X

I had assumed that the linking was a second step, so I didn’t specify any libs.

I know I’m missing something, but what is beyond me. I’ll poke around in the pandAI stuff a bit more.

Thanks again.

4

I don’t include the pandAI main lib, just the meshgen code. This is probably the problem. Will update in a second.

5

Final try of the night:

Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ g++ -Wall meshgen.cxx -o meshgen.o  -fPIC -02 -arch i386 -I /Users/zenogerakin/Projects/tile_rts/Pandai_v1.0_src -I /Developer/Panda3D/include -I /usr/include/python2.6 -I /Users/zenogerakin/Projects/tile_rts/panda3d-1.7.2/dtool/src
In file included from meshNode.h:20,
                 from aiMeshGenerator.h:17,
                 from meshgen.cxx:20:
globals.h:16: warning: ignoring #pragma warning 
globals.h:17: warning: ignoring #pragma warning 
globals.h:18: warning: ignoring #pragma warning 
Undefined symbols for architecture i386:
  "TypeRegistry::ptr()", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccj8IE8s.o
  "TypeRegistry::register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccj8IE8s.o
  "TypeRegistry::record_derivation(TypeHandle, TypeHandle)", referenced from:
      register_type(TypeHandle&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, TypeHandle)in ccj8IE8s.o
  "TypedObject::init_type()", referenced from:
      Socket_IP::init_type()     in ccj8IE8s.o
  "TypedObject::~TypedObject()", referenced from:
      Socket_IP::~Socket_IP()in ccj8IE8s.o
      Socket_IP::~Socket_IP()in ccj8IE8s.o
  "Notify::ptr()", referenced from:
      BitMask<unsigned int, 32>::set_bit(int)in ccj8IE8s.o
  "Notify::assert_failure(char const*, int, char const*)", referenced from:
      BitMask<unsigned int, 32>::set_bit(int)in ccj8IE8s.o
  "MeshGenerator::MeshGenerator(char const*, char const*)", referenced from:
      _main in ccj8IE8s.o
  "typeinfo for TypedObject", referenced from:
      typeinfo for Socket_IPin ccj8IE8s.o
  "TypedObject::_type_handle", referenced from:
      TypedObject::get_class_type()       in ccj8IE8s.o
  "_memory_hook", referenced from:
      MemoryBase::operator delete(void*)in ccj8IE8s.o
  "Socket_IP::_type_handle", referenced from:
      Socket_IP::get_class_type()      in ccj8IE8s.o
      Socket_IP::init_type()     in ccj8IE8s.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$

TypedObject.h is included with the above command. I guess this means that I have a version that doesn’t include the functions that are being called. I can think of two reasons - these functions are being compiler defined out because of the platform (I doubt it) or pandAI is written against the dev source.

I’ll look into this more tomorrow.

Thanks!

6

Ah, you did omit the -c parameter. This is what makes linking a second step.

David

7

sigh… I re-read your comment this morning and it makes me very depressed indeed. I’ll try again tonight, with probably improved results since I’ll actually be following the directions.

Thanks again!

8

well… almost…

I get it compiled to an o-file fine, but I’m missing a lib when I link

Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ g++ meshgen.o aiMeshGenerator.o meshNode.o -o meshgen -fPIC -O2 -arch i386 -L/Developer/Panda3D/lib -lp3framework -lpanda -lpandafx -lpandaexpress -lp3dtoolconfig -lp3dtool -lp3direct -L/Users/zenogerakin/Projects/tile_rts/Pandai_v1.0_src
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ ./meshgen
dyld: Symbol not found: __Py_NoneStruct
  Referenced from: /Developer/Panda3D/lib/libp3dtool.1.7.dylib
  Expected in: dynamic lookup

Trace/BPT trap
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ g++ meshgen.o aiMeshGenerator.o meshNode.o -o meshgen -fPIC -O2 -arch i386 -L/Developer/Panda3D/lib -lp3framework -lpanda -lpandafx -lpandaexpress -lp3dtoolconfig -lp3dtool -lp3direct -L/Users/zenogerakin/Projects/tile_rts/Pandai_v1.0_src -L/usr/includepython2.5
ld: warning: directory not found for option '-L/usr/includepython2.5'
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ g++ meshgen.o aiMeshGenerator.o meshNode.o -o meshgen -fPIC -O2 -arch i386 -L/Developer/Panda3D/lib -lp3framework -lpanda -lpandafx -lpandaexpress -lp3dtoolconfig -lp3dtool -lp3direct -L/Users/zenogerakin/Projects/tile_rts/Pandai_v1.0_src -L/usr/include/python2.6
Zeno-Gerakins-iMac:meshgen_v1.0_src zenogerakin$ ./meshgen
dyld: Symbol not found: __Py_NoneStruct
  Referenced from: /Developer/Panda3D/lib/libp3dtool.1.7.dylib
  Expected in: dynamic lookup

Trace/BPT trap

That is two tries with some additional libs. When I try to include any of the libs that drwr references in his earlier post they are not found. Probably I don’t know the right path. Anyway, enough for tonight.

Thanks in advance if anyone sees what I have wrong!

9

I think you’ll also need to specify -framework Python.

10

!! victory.

Thanks everyone.