Cannot find symbol in dynamically loaded library

Member

Posts: 22
Joined: 2007.07

Post: #1

Jan 24, 2010 — 06:12 PM

I'm trying to get a game to run that was written with Python using Audiere for audio (here). I found a patch adding an SDL backend here and got it to compile fine, but now the python binding won't work. It compiles without problems, but running it gives

Code:

ImportError: dlopen(/Users/thej/.python-eggs/pyaudiere-0.2-py2.6-macosx-10.5-i386.egg-tmp/audiere.so, 2): Symbol not found: __ZN7audiere14SDLAudioDevice6createERKNS_13ParameterListE

  Referenced from: /usr/local/lib/libaudiere-1.9.5.dylib

  Expected in: flat namespace

So from what I can figure out either Audiere or the Python bindings need to be built with either flat namespace or two level namespace or some combination thereof, but I can't get it to work so if anyone can explain to me what's actually going on that would probably be a lot better than trying alternate settings at random.

OneSadCookie

Luminary

Posts: 5,125
Joined: 2002.04

Post: #2

Jan 24, 2010 — 08:02 PM

Code:

$ c++filt

__ZN7audiere14SDLAudioDevice6createERKNS_13ParameterListE

audiere::SDLAudioDevice::create(audiere::ParameterList const&)

It looks like /usr/local/lib/libaudiere-1.9.5.dylib is dlopening /Users/thej/.python-eggs/pyaudiere-0.2-py2.6-macosx-10.5-i386.egg-tmp/audiere.so and expecting to find audiere::SDLAudioDevice::create(audiere::ParameterList const&) but not finding it. What does

Code:

nm /Users/thej/.python-eggs/pyaudiere-0.2-py2.6-macosx-10.5-i386.egg-tmp/audiere.so

say?

Muskrat

Member

Posts: 22
Joined: 2007.07

Post: #3

Jan 24, 2010 — 08:21 PM

Well that would be a very confusing state of affairs, since the library itself shouldn't have any reference to the Python bindings and before I applied the patch that enabled SDL I didn't get any symbol errors.

Here's the output of nm.

Code:

U _AdrCreatePinkNoise

         U _AdrCreateSampleBuffer

         U _AdrCreateSquareWave

         U _AdrCreateTone

         U _AdrCreateWhiteNoise

         U _AdrGetSupportedAudioDevices

         U _AdrGetVersion

         U _AdrOpenDevice

         U _AdrOpenSampleSource

         U _AdrOpenSound

00004020 D _AudiereMethods

00004084 d _Audiere_GetDevices_doc

00004050 d _Audiere_OpenDevice_doc

00004fa0 D _AudioDeviceMethods

00005180 d _AudioDevice_CreatePinkNoise_doc

00005248 d _AudioDevice_CreateSquare_doc

000052bc d _AudioDevice_CreateTone_doc

000051e8 d _AudioDevice_CreateWhiteNoise_doc

00005010 d _AudioDevice_OpenArray_doc

000050dc d _AudioDevice_OpenSound_doc

00004904 d _AudioDevice_doc

00005404 d _OutPutStream_doc

000059e0 d _OutputStreamMethods

00005a9b d _OutputStream_Pause_doc

00005ab4 d _OutputStream_Play_doc

00005a30 d _OutputStream_Reset_doc

00005a64 d _OutputStream_Stop_doc

         U _PyArg_ParseTuple

         U _PyCObject_AsVoidPtr

         U _PyCObject_Type

         U _PyDict_New

         U _PyDict_SetItem

         U _PyDict_SetItemString

         U _PyErr_Format

         U _PyErr_Print

         U _PyErr_SetString

         U _PyExc_ImportError

         U _PyExc_RuntimeError

         U _PyFloat_AsDouble

         U _PyFloat_FromDouble

         U _PyImport_ImportModule

         U _PyInt_AsLong

         U _PyInt_FromLong

         U _PyModule_GetDict

         U _PyObject_Free

         U _PyObject_GetAttrString

         U _PyString_FromString

         U _PyType_Type

         U _Py_FindMethod

         U _Py_InitModule4

00006378 S __PY_AUDIERE_HANDLE

         U __PyObject_New

         U __Py_NoneStruct

         U __Unwind_Resume

00002670 T __Z17NewPyOutputStreamPN7audiere12OutputStreamE

00003090 t __Z17OutputStream_PlayP7_objectS0_

000030f0 t __Z17OutputStream_StopP7_objectS0_

00000c90 T __Z18Audiere_GetDevicesP7_objectS0_

00000b70 T __Z18Audiere_OpenDeviceP7_objectS0_

000030c0 t __Z18OutputStream_PauseP7_objectS0_

00003130 t __Z18OutputStream_ResetP7_objectS0_

00002640 T __Z19AudioDevice_deallocP7_object

000026e0 T __Z19AudioDevice_getattrP7_objectPc

00003060 T __Z20OutputStream_deallocP7_object

00003160 t __Z20OutputStream_getattrP7_objectPc

000033d0 t __Z20OutputStream_setattrP7_objectPcS0_

00002d50 T __Z21AudioDevice_OpenArrayP7_objectS0_

00002ba0 T __Z21AudioDevice_OpenSoundP7_objectS0_

00002780 T __Z22AudioDevice_CreateToneP7_objectS0_

000028a0 T __Z24AudioDevice_CreateSquareP7_objectS0_

00002ab0 T __Z27AudioDevice_CreatePinkNoiseP7_objectS0_

000029c0 T __Z28AudioDevice_CreateWhiteNoiseP7_objectS0_

00001f70 T __ZN7audiere11SplitStringERSt6vectorISsSaISsEEPKcc

000021c0 T __ZN7audiere24GetSupportedAudioDevicesERSt6vectorINS_15AudioDeviceDescESaIS1_EE

         U __ZN9__gnu_cxx18__exchange_and_addEPVii

00000f10 T __ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag

         U __ZNSs4_Rep10_M_destroyERKSaIcE

         U __ZNSs4_Rep11_S_terminalE

         U __ZNSs4_Rep20_S_empty_rep_storageE

         U __ZNSs4_Rep9_S_createEmmRKSaIcE

         U __ZNSs6assignERKSs

         U __ZNSsC1EPKcRKSaIcE

         U __ZNSsC1ERKSs

         U __ZNSsD1Ev

000012d0 T __ZNSt6vectorIN7audiere15AudioDeviceDescESaIS1_EE14_M_fill_insertEN9__gnu_cxx17_​_normal_iteratorIPS1_S3_EEmRKS1_

00000fe0 T __ZNSt6vectorIN7audiere15AudioDeviceDescESaIS1_EE5eraseEN9__gnu_cxx17__normal_it​eratorIPS1_S3_EES7_

00001a50 T __ZNSt6vectorISsSaISsEE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPSsS1_EERK​Ss

00001e80 T __ZNSt6vectorISsSaISsEE5eraseEN9__gnu_cxx17__normal_iteratorIPSsS1_EES5_

         U __ZSt17__throw_bad_allocv

         U __ZSt19__throw_logic_errorPKc

         U __ZSt20__throw_length_errorPKc

00001150 T __ZSt26__uninitialized_fill_n_auxIN9__gnu_cxx17__normal_iteratorIPN7audiere15Aud​ioDeviceDescESt6vectorIS3_SaIS3_EEEEmS3_EvT_T0_RKT1_12__false_type

         U __ZdlPv

         U __Znwm

         U ___cxa_begin_catch

         U ___cxa_end_catch

         U ___cxa_rethrow

         U ___gxx_personality_v0

000008a4 t __dyld_func_lookup

00000000 t __mh_bundle_header

00004840 D _audiere_AudioDeviceType

00005340 D _audiere_OutputStreamType

000040c8 d _docstring

         U _free

000008c0 T _initaudiere

         U _malloc

         U _memcpy

         U _strchr

000040c1 d _ver

00004000 d dyld__mach_header

00000890 t dyld_stub_binding_helper

OneSadCookie

Luminary

Posts: 5,125
Joined: 2002.04

Post: #4

Jan 24, 2010 — 08:27 PM

Sorry, that's not really telling me anything more useful :/

Muskrat

Member

Posts: 22
Joined: 2007.07

Post: #5

Jan 25, 2010 — 01:54 PM

I tried linking in Audiere statically and now the symbol shows up in the symbol table, but I get

Code:

dlopen(/Users/thej/.python-eggs/pyaudiere-0.2-py2.6-macosx-10.5-i386.egg-tmp/audiere.so, 2): Symbol not found: __ZN7audiere14SDLAudioDevice6createERKNS_13ParameterListE

  Referenced from: /Users/thej/.python-eggs/pyaudiere-0.2-py2.6-macosx-10.5-i386.egg-tmp/audiere.so

  Expected in: dynamic lookup

What I really don't get is the "Expected in" line. What kind of dynamic lookup could it be doing when everything is contained in the library itself?

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