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我试图构建和链接CLAM project的例子。我链接并得到以下错误。我不知道什么是错的。错误链接器C + +的Linux Scons：CLAM项目
>== Linking UserTutorial1
>/usr/local/lib/libclam_core.so: undefined reference to `dlclose'
>/usr/local/lib/libclam_core.so: undefined reference to `dlsym'
>/usr/local/lib/libclam_core.so: undefined reference to `dlopen'
>/usr/local/lib/libclam_core.so: undefined reference to `dlerror'
>/usr/local/lib/libclam_core.so: undefined reference to `dladdr'
>collect2: error: ld returned 1 exit status
>scons: *** [UserTutorial1] Error 1
>scons: building terminated because of errors.
有没有人可以帮我解决这个问题。我应当怎样更改下面SConstruct所示：
>## #!/usr/bin/python
>import os
>import glob
>import sys
>options = Variables('options.cache', ARGUMENTS)
>options.Add(PathVariable('clam_prefix', 'The prefix where CLAM was installed', ''))
>options.Add(BoolVariable('verbose', 'Display the full command line instead a short command >description', 'no'))
>options.Add(BoolVariable('crossmingw', 'Enables MinGW crosscompilation from linux', 'no'))
>def scanFiles(pattern, paths) :
> files = []
> for path in paths :
> files+=glob.glob(path+"/"+pattern)
> return files
>def recursiveDirs(root) :
> return filter((lambda a : a.rfind(".svn")==-1), [ a[0] for a in os.walk(root)] )
>def unique(list) :
> return dict.fromkeys(list).keys()
>toolchain = 'default'
>if sys.platform == "win32" : toolchain = 'mingw'
>env = Environment(tools=[toolchain], options=options)
>options.Save('options.cache', env)
>#TODO: This didn't work for dynamic linking
>def renameEmbededFileSymbols(source, target, env) :
> """ Remove the path part of the symbol name for the embeded file"""
> objdumpOutput=os.popen("objdump -x %s | grep _binary'.*'start"%target[0] , "r").read()
> startSymbol=objdumpOutput.split()[-1]
> infix = startSymbol[len('_binary_'):-len("_start")]
> baseName = os.path.split(str(source[0]))[-1]
> newInfix = infix[-len(baseName):]
> return Execute("objcopy %(target)s "
> "--redefine-sym _binary_%(infix)s_start=_binary_%(newInfix)s_start "
> "--redefine-sym _binary_%(infix)s_end=_binary_%(newInfix)s_end "
> "--redefine-sym _binary_%(infix)s_size=_binary_%(newInfix)s_size " % {
> "infix": infix,
> "newInfix": newInfix,
> "target": target[0],
> }
> )
>"""
>embededFileBuilder = Builder(
> action=Action([
> ["ld", "-fPIC", "--shared", "-b", "binary", "-o", "$TARGET", "$SOURCE"],
> renameEmbededFileSymbols,
> ],
> ),
> suffix='.os',
> )
>env['BUILDERS']['EmbededFile']=embededFileBuilder
>"""
>env.SConsignFile() # Single signature file
>crosscompiling=env['crossmingw']
>CLAMInstallDir = env['clam_prefix']
>clam_sconstoolspath = os.path.join(CLAMInstallDir,'share','clam','sconstools')
>env.Tool('clam', toolpath=[clam_sconstoolspath])
>env.Tool('qt4', toolpath=[clam_sconstoolspath])
>if crosscompiling :
> env.Tool('crossmingw', toolpath=[clam_sconstoolspath])
>env.AppendUnique(ASFLAGS='-I. ')
>env['CXXFILESUFFIX'] = '.cxx'
>env['QT4_UICDECLSUFFIX'] = '.hxx'
>env.moveIntermediateInto('generated')
>env.activateColorCommandLine()
>if not env['verbose']: env.ClamQuietCompilation()
>env.EnableClamModules(libs=[
> 'clam_core',
> 'clam_audioio',
> 'clam_processing',
> ], path=CLAMInstallDir)
>env.EnableQt4Modules([
> 'QtCore',
> 'QtGui',
> 'QtOpenGL',
># 'QtSql',
># 'QtNetwork',
># 'QtTest',
># 'QtXml',
># 'QtSvg',
># 'QtUiTools',
># 'QtDesigner',
># 'Qt3Support',
> ], debug=False,
> crosscompiling=crosscompiling,
> )
>sourcePaths = []
>extraPaths = [
> CLAMInstallDir+'/include',
> CLAMInstallDir+'/include/CLAM', # KLUDGE to keep old style includes
>]
>includePaths = sourcePaths + extraPaths
>sources = scanFiles('*.cxx', sourcePaths)
>sources = unique(sources)
>singleSourceExamples = [
> "WritingProcessings.cxx",
> "NetworkPersistence_example.cxx",
> "NetworkUsage_example.cxx",
> "AudioFileReading_example.cxx",
> "AudioFileWriting_example.cxx",
> "AudioIOExample.cxx",
># "Configurators_example.cxx", # QT4Port
> "DescriptorComputation_example.cxx",
> "FDFilterExample.cxx",
> "FFT_example.cxx",
> "FileInfo_example.cxx",
> "FilePlayback_example.cxx",
> "FundamentalDetect.cxx",
> "LPCAnalysis_example.cxx", # TODO FLTK Dependencies -> Qt4
> "Midi2XmlExample.cxx",
> "MIDIFileReadWriteExample.cxx",
> "MIDIIOExample.cxx",
> "MIDIOut_example.cxx",
> "MIDI_Synthesizer_example.cxx",
> "NetworkPersistence_example.cxx",
> "NetworkUsage_example.cxx",
> "OfflineAudioConvolution.cxx",
> "PersistenceThroughDTs_example.cxx",
> "POCompositeExample.cxx",
> "SimplePortsUsage_example.cxx",
> "ProcessingLifeCycle_example.cxx",
> "ProcessingObject_controls_example.cxx",
> "SDIF_And_Segment_example.cxx", # TODO: FLTK Dependencies
> "Spectrum_example.cxx",
> "StereoToMonoFile.cxx",
># "ThreadedProcessing_example.cxx", # TODO: Depends on Resample and FLTK
> "Tutorial/UserTutorial1.cxx",
> "Tutorial/UserTutorial2.cxx",
> "Tutorial/UserTutorial3.cxx",
> "Tutorial/UserTutorial4.cxx",
> "Tutorial/UserTutorial5.cxx",
> "Tutorial/UserTutorial6.cxx",
>]
>directoryBasedExamples = [
> "PortsAndControlsUsageExample",
> "ControlArrayExamples",
> "Wav2SDIF",
> "SDIF2Wav",
> "SDIF2WavStreaming",
>]
>directoryBasedLibraries = [
># "PluginExamples/ClamLadspaPluginExample",
> "PluginExamples/ClamNativePluginExample",
>]
>singleSourceLibraries = [
>]
>env.Append(CPPPATH=includePaths)
>env.AppendUnique(CPPFLAGS=["-g", "-Wall"])
>#env.AppendUnique(DEFINES=["_DEBUG"])
>examples = []
>for libsource in singleSourceLibraries :
> library = os.path.basename(libsource)
> examples += [ env.SharedLibrary(source = libsource) ]
>for folder in directoryBasedLibraries :
> librarySources = glob.glob(folder+"/*.cxx")
># librarySources += [env.EmbededFile(file) for file in glob.glob(folder+"/*.clamnetwork")]
> library = os.path.basename(folder)
> examples += [ env.SharedLibrary(target=library, source = librarySources) ]
>for main in singleSourceExamples :
> executable = os.path.splitext(os.path.basename(main))[0]
> examples += [ env.Program(target=executable, source = sources + [main]) ]
>for folder in directoryBasedExamples :
> exampleSources = glob.glob(folder+"/*.cxx")
> executable = os.path.basename(folder)+"Exe"
> examples += [ env.Program(target=executable, source = sources + exampleSources) ]
>if not crosscompiling :
> # Still having problems crosscompiling aubio
> tickEnv = env.Clone()
> tickEnv.ParseConfig('pkg-config aubio --cflags --libs')
> tickEnv.ParseConfig('pkg-config samplerate --cflags --libs')
> tickSrc = glob.glob("TickExtractor/*cxx")
> examples += [ tickEnv.Program(target="TickExtractorExe", source = tickSrc) ]
>env.Alias('examples',examples)
>env.Default(examples)
看起来你缺少libdl。不知道你在哪里添加它。 – cup 2014-11-23 07:19:21
谢谢;我想是的，但在哪里，我也想知道... – telcom 2014-11-23 07:44:54
设置CPPPATH – cup 2014-11-23 08:06:36