Build Caffe and pycaffe error

[y657250418]

When I use make -j8 && make pycaffe to build caffe and pycaffe, I get these errors(with Centos system, protobuf 2.5.0, opencv 3.2.0, gcc 4.8.5 ):

/usr/bin/ld: warning: libcudart.so.7.5, needed by /usr/local/lib/libopencv_cudabgsegm.so, may conflict with libcudart.so.8.0
.build_release/examples/mnist/convert_mnist_data.o: In function convert_dataset(char const*, char const*, char const*, std::string const&)': convert_mnist_data.cpp:(.text+0x7b0): undefined reference to google::protobuf::internal::kEmptyString'
.build_release/lib/libcaffe.so: undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::SetTotalBytesLimit(int, int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream*, std::string*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::VarintSize32Fallback(unsigned int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::Skip(int)' .build_release/lib/libcaffe.so: undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadVarint64Fallback(unsigned long*)' .build_release/lib/libcaffe.so:/ undefined reference usr/to bin/ld:google: warning::protobuf libcudart.so.7.5,:: neededio::CodedInputStream::ReadTagFallback by() /'
usr.build_release/local/lib/libopencv_cudabgsegm.so/lib, /libcaffe.somay : conflictundefined withreference libcudart.so.8.0to google:.build_release:protobuf/::libio/libcaffe.so::: CodedOutputStreamundefined ::VarintSize64(reference unsigned tolong)'cv::
_OutputArray:.build_release:_OutputArray/lib(cv/libcaffe.so:::Mat& undefined reference )'
.build_release/to lib/googlelibcaffe.so:::protobuf::Message undefined:: referenceSpaceUsed( to) const' . googlebuild_release/lib/:/usrlibcaffe.so::protobuf /undefined: :binioreference: :to/ ldCodedInputStream:::cvSetTotalBytesLimit (:intwarning,: imreadint:)(' libcudart.so.7.5.stdbuild_release,/:lib /:libcaffe.soneeded: stringby /undefinedusrconst/ local/reference&lib /tolibopencv_cudabgsegm.so,, may googleconflictint with:): protobuf'libcudart.so.8.0:
:
internal.:build_release./:libbuild_release/WireFormatLitelibcaffe.so/:: examplesundefined/ :referencecifar10 /toReadString convert_cifar_data.o(google::google:protobuf: ::protobuf:Inio:: ::CodedInputStreamfunction: :ioconvert_dataset:(:stdReadVarint32FallbackCodedInputStream:(,: unsignedstdstring: : stringconstint&),* )''std

.:build_release./:libstring/build_releaselibcaffe.so :/ libundefinedconst /referencelibcaffe.so&: ,undefinedto referencestd : :tostring vtable const &)for'google::
: protobufconvert_cifar_data.cpp:cv::io::(:.CodedOutputStream::text:+VarintSize32Fallback0x8dd()_InputArray:unsigned 'undefined
referenceint. build_release)/'lib
/to. libcaffe.sobuild_releasegoogle::/: protobufundefinedlib :reference /:libcaffe.soto:internal undefined :referencegoogle :to: kEmptyString:google':protobuf: protobuf::::convert_cifar_data.cppiointernal::::CodedInputStream(:::.SkipGeneratedMessageReflection(:text:+int0x10d1GeneratedMessageReflection)(:)google' :.:build_releaseundefined/protobuflib /reference: libcaffe.soto: :Descriptor googleconst :,: undefinedprotobufgoogle: ::internalreference:::kEmptyStringprotobuf :'to: Message cvconst.*build_release,/ libint/:libcaffe.so :: undefined_InputArrayconst: :*_InputArrayreference(,cv : :toMatint const,&) 'intcv,
:int.,build_release :/googlelib:_OutputArray:/protobuf::libcaffe.so::DescriptorPool: _OutputArrayconst( ,cv :undefined: googlereferenceMat to&:) ':
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:.allocatorbuild_release<:/:intimread(lib>/stdlibcaffe.so :> :undefined const:referencestring& constto& ),google': :intprotobuf :):'io :.:.CodedInputStreambuild_releasebuild_release/:lib//lib:/libcaffe.solibcaffe.soSkip:: (undefined intundefinedreference referenceto) ' to .googlegooglebuild_release::/:libprotobuf::/:libcaffe.sointernal:: :undefinedStringTypeHandlerBase :reference: protobuftoNew: :(io:)':
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to'.
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:to/RepeatedPtrFieldBase.usr build_release:/:googlelocal/:Swaplib/(:lib/protobufgooglelibcaffe.so/::libopencv_cudabgsegm.so::: internal,protobuf:undefined: :reference:GeneratedMessageReflectionmayinternal :to::conflict:RepeatedPtrFieldBase *withGeneratedMessageReflection)(' google
libcudart.so.8.0google.::build_release
:/:protobuf.protobuf:build_release:lib/:/:libDescriptoriolibcaffe.so /:constlibcaffe.so: ::undefinedCodedInputStream ,undefined: reference: googlereferenceReadTagFallback:to(: protobuf):to'google :: Message.:cv protobufbuild_releaseconst:/::,lib: /ioint/libcaffe.so: usr:_OutputArray:const/ CodedOutputStream:bin,undefined:: /:_OutputArrayintreferenceWriteVarint64ToArrayld,(( : unsignedto int cv,warning :long:int:,google , Matlibcudart.so.7.5 unsigned:,google&: ):neededcharprotobuf:' *protobuf:by): ':./:build_releaseio usr/DescriptorPool./lib:build_release local//const/:liblibcaffe.soCodedOutputStreamlib*/::/,:libopencv_cudabgsegm.so libcaffe.so VarintSize64,googleundefined: ( :mayundefinedunsigned: referenceprotobufconflict : longto:with) reference MessageFactory'libcudart.so.8.0 google
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(usrreference:. / :)undefinedbuild_releasetoStringTypeHandlerBase bin/ : /libconst:ld/referenceDeletegoogle:libcaffe.so (' :to: std warning: :.:undefined:protobuf build_release google:libcudart.so.7.5/referencestringlib::, /:ioto )protobuf:libcaffe.soneeded ::: :CodedOutputStream'bygoogle :internal :undefined::/.: :usrbuild_releaseprotobufWriteVarint32FallbackToArray/WireFormatLite/reference:lib(local :://:unsignedtoiolibcaffe.soReadStringlib ( ::/googleint: :libopencv_cudabgsegm.soCodedInputStreamundefined,::,cvprotobuf : :unsignedreference:maySetTotalBytesLimit :: ( iochartoimreadconflictint* (:, ):stdwith 'google:CodedInputStreamint : *)libcudart.so.8.0::' ,string protobuf. .build_release: build_releasestd/:/:libinternalconstlib:/:/&libcaffe.so:stringlibcaffe.so,collect2: error: ld returned 1 exit status kEmptyString*:: ') intundefinedundefined'). ' referencereferencebuild_release. /build_release tolib.to/ / build_releaselibcaffe.solib:google//cv :libcaffe.so:undefined::lib: protobuf_OutputArrayreference/::undefinedlibcaffe.so :::_OutputArray internalto(undefined: cvreference: :cvWireFormatLitetoreference::: Mat ::&toimencodeReadStringgoogle)( ('std:google :::.protobufgoogle:build_release::protobuf/:string:lib::/: iolibcaffe.soprotobufconstio:::& :::,ioundefinedCodedInputStream:: CodedOutputStream:reference,cvCodedInputStream ::tostd:: :_InputArrayReadVarint32Fallback`:: googlestring(const::&unsigned):VarintSize32Fallback 'protobuf(int,
:unsigned. /:)build_releaseintstdio'/):usr
:make: ':lib./:** [.build_release/examples/mnist/convert_mnist_data.bin] Error 1vector

/build_releaseCodedInputStreambin.libcaffe.so<:/build_releasemake: :unsigned://lib SetTotalBytesLimit*** Waiting for unfinished jobs....libldundefinedchar(
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togooglereference.( to :)googlebuild_releaseto: google:/ :'protobuf :lib::.cv/cvprotobuf:build_releaseprotobuflibcaffe.so::io/:::::_InputArray:: lib:::_InputArrayundefined/internal:CodedInputStream: internal:libcaffe.so::_InputArrayreference:::_InputArray(: :ReadTagFallback( StringTypeHandlerBasecvtoRepeatedPtrFieldBasecv(:: undefined:)::::'DeleteMatgoogle Mat : :reference(. constSwap: build_releaseconst&(stdtoprotobuf&/google:):) :lib':'::
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reference:/:
classification.cpp constlibcaffe.sointernal.:to&io::build_release(, : /.:WireFormatLite libundefined:text:google/cv:CodedOutputStream: +libcaffe.so::ReadStringreference0x240::protobuf( ::) googleto:WriteVarint64ToArray_InputArrayundefined::: (: Message constprotobufreferenceunsignedundefined:google& : ::to:,long:SpaceUsed referenceio protobuf(,`:std: ):google:tounsigned CodedInputStream:Message: :const '::vectorchar,
`protobuf:* .<:SpaceUsedcvstdbuild_release::)(unsigned::/') lib:io_InputArray
/stringchar::const.libcaffe.so:,:'build_release):_InputArray
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libcaffe.so undefined).::charundefined build_release' : >reference/undefined
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Messageint(:int.::*intStringTypeHandlerBasebuild_release,:_OutputArray:))/ SpaceUsed::''lib(Newunsigned

/)(:. .libcaffe.sochar) build_release_OutputArraybuild_release*:const'/( /)'
libundefinedcvlib':.
/ /
:.libcaffe.sobuild_releaselibcaffe.soreference/Mat:build_release:lib /&/ undefinedlibtolibcaffe.soundefined / : referencelibcaffe.soreference): undefined vtable to'tocollect2: error: ld returned 1 exit status undefined reference toreferencecv::imread(std::string const& , int` vtable) for cv::_InputArray''

.build_release/tolib/.libcaffe.sobuild_release google:/::protobuf::UnknownFieldSet:: UnknownFieldSetundefinedlib reference to /libcaffe.so: google(undefined: :reference)protobuf ::toio' ::CodedInputStreamgoogle::::protobuf.build_release:ReadVarint32Fallback(unsigned/ intlib:*/)internal': .:build_releaselibcaffe.so/GeneratedMessageReflection:: :libGeneratedMessageReflection/(google:libcaffe.so:protobuf:undefined:for : Descriptorundefinedcv referenceconstreference: tovtable :for_InputArray ,to' cv
google`::google::._InputArraymake: protobuf:build_release'** [.build_release/tools/convert_imageset.bin] Error 1::

:protobuf/Message.:lib build_release:/const/lib*,libcaffe.so/internallibcaffe.so:: int undefined:undefined const: RepeatedPtrFieldBasereference,reference to int: ,:to Swapgoogleint :,(: googleprotobufgoogleint::,::: internalprotobufgoogle::::::protobufGeneratedMessageReflection:internal:protobuf::::internal:::GeneratedMessageReflection:DescriptorPool (:googleconst :GeneratedMessageReflection:,protobufcv:: ::google:GeneratedMessageReflection::Descriptor: const*, google::_InputArrayprotobufprotobuf(::::google:MessageFactory:*, _InputArray:int:)protobufMessage'( cv:const:.*:build_releaseMat,/: libDescriptorintconst/ &constlibcaffe.so)*:,const' * undefined int .reference,build_release, / intlibto , / libcaffe.sogoogle:::int protobufundefined,: :internal:google ::StringTypeHandlerBasereference:: protobuf:toDelete: :(stdgoogle:DescriptorPool: :const:*,protobuf stringgoogle*::)::protobuf':io :::MessageFactory. CodedInputStream*build_release,classification.cpp/ lib::/int:libcaffe.so):ReadVarint64Fallback(unsigned long*)' .build_release/lib/libcaffe.so: undefined reference toundefined' reference to google::protobuf:
:.internal google::protobuf::build_releaseio/::lib::CodedInputStream/kEmptyStringlibcaffe.so: :' undefined:.build_release ReadTagFallback/referencelib(/)libcaffe.so: 'undefined to reference .build_releasegoogle/lib/to: libcaffe.so:cv:: imencodeundefined reference( std::protobuf:tostring :: internalgoogleconst:&::StringTypeHandlerBase:,: :Deletecvprotobuf:(:std::io::_InputArrayCodedOutputStream::: const&string,: VarintSize64std)'(
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int...>build_release build_releasebuild_release/>/lib/lib/lib/libcaffe.solibcaffe.so::/ libcaffe.soundefinedundefined: referenceundefinedreference to reference to consttogoogle& :) 'cv ::cv:protobuf:.::build_releaseimencodeimread/((libstd:/io:std:::libcaffe.sostring: :stringconst & undefined,const &cv,reference: ::intto_InputArray) ' CodedOutputStreamconst:&.:google,build_release: :std/protobuflib::internal/:libcaffe.so: :undefinedWriteVarint64ToArrayStringTypeHandlerBase :reference:( unsignedNew ()to' long
, .unsignedbuild_release/lib /libcaffe.so:char undefined* )reference googleto:': .googleprotobuf:build_release::/:lib/ioprotobuf:::libcaffe.soCodedInputStream::google:: UnknownFieldSetReadVarint32Fallbackundefined(:: ::unsignedprotobufUnknownFieldSet (referenceint: )to':)
Message. 'build_releaseconstgoogle /*:lib.:/build_releaseprotobuflibcaffe.so,:/:: libUnknownFieldSet/undefined libcaffe.so :: undefinedreference: referenceto( ~ .UnknownFieldSetgoogleto(: text:protobuf):'vtable+: 0x40dinternal.):for:: RepeatedPtrFieldBase build_releasecv:/undefined:: Swap:reference(lib _InputArraygoogle'to::/: :libcaffe.so. vectorprotobufbuild_release<:/:cv libintunsigned:/libcaffe.soundefined internal : char: reference,:undefined const RepeatedPtrFieldBasereferencestdto,: : allocatortoint) google<,:google' unsigned
: :.:charintbuild_releaseprotobuf>,/:protobuf lib:>:int:/&io,libcaffe.so,internal :: std:google:undefinedGeneratedMessageReflection:: :::reference:vector: GeneratedMessageReflectionCodedOutputStream<to(int :protobufgooglegoogle,::: :WriteVarint32FallbackToArray:std::protobuf(:DescriptorPoolprotobuf:unsigned :: constallocator::int*<Descriptorio, int:,const>: * googleCodedOutputStreamunsigned,>: : : googlecharWriteVarint64ToArray::*constprotobuf(:&:protobuf)unsigned:)' :':longMessageFactory ,Message. *build_releaseunsignedconst /*:charlib,:,/*_InputArray libcaffe.so :):intint' :)undefined ' const. reference*build_releasecollect2: error: ld returned 1 exit status . to_InputArraybuild_release (/libcv:google:://Matlibcaffe.so: lib:constprotobuf /undefined&:libcaffe.so :):internal':
referenceundefined:classification.cppStringTypeHandlerBase :::reference New(toto(. )text'+
0x422.google):build_release:google:/ libprotobuf:/::libcaffe.so:undefined:UnknownFieldSet :protobufreferenceundefined: ~:toUnknownFieldSet:reference(internal ) 'tocv: :.google::build_releaseStringTypeHandlerBase/_InputArray:::::protobuflib::/Delete_InputArraylibcaffe.so:(:UnknownFieldSetcv(: :undefined::stdUnknownFieldSetmake: Mat(** [.build_release/examples/cifar10/convert_cifar_data.bin] Error 1:reference)
'constto:
& string).'googlebuild_release*:/) lib:/classification.cppprotobuf'libcaffe.so:: (::.io .build_release:undefined/: textreferenceCodedOutputStreamlib :+/to:0x44blibcaffe.so WriteVarint32FallbackToArray:)( google:undefined: :unsigned protobuf :referenceint:undefined,internal :referenceunsigned: toRepeatedPtrFieldBasecharto* :):Swapcv(googlegoogle:'::::
:protobufsplitprotobuf(::cv::internal,internal: ::int::Matcollect2: error: ld returned 1 exit status
:RepeatedPtrFieldBase ,*constkEmptyString) '&int',,

. .build_releasestdbuild_releaseint:/,:/ liblibvectorgoogle/</libcaffe.so:libcaffe.socv:::: protobuf ::undefinedundefined: MatDescriptorPoolreference reference,toconst std*to,google: :google :::allocator:cvprotobuf:cvprotobuf:::::::MessageFactoryimencodeioMat*(:std :,> CodedOutputStream:&:int):):make: stringWriteVarint64ToArray'' (*** [.build_release/tools/finetune_net.bin] Error 1
const

unsigned&. classification.cpp,long:build_release (/,.cv lib:unsigned/:textlibcaffe.so +_InputArraychar: 0x689 )const)&undefined:',
referenceundefined. stdbuild_releaseto / :lib:referencegoogle/ :vectorlibcaffe.soto<::unsigned protobuf undefined:charcv:,:internal : reference:std:_OutputArray StringTypeHandlerBase::to: Delete:(_OutputArraystd(:google::cvstring::protobuf:Mat:*:UnknownFieldSet)::~'UnknownFieldSet .build_release(/)'lib &/.)build_release'libcaffe.so/ lib:/ libcaffe.so:undefined classification.cppundefined: (reference .referenceto textto cvgoogle+::0x706:)protobuf::imencode:: ioundefined::CodedOutputStream :(:stdWriteVarint32FallbackToArrayreference( :unsigned:string to constint&,, unsigned cvcharcv:):'::_InputArray_OutputArray:
const::_OutputArray&:,( cv:stdallocator::<:unsignedcollect2: error: ld returned 1 exit status
vector Mat char>,& )&std':
:,allocatorclassification.cpp< unsigned: (charstd>.:text +>:0x719&)vector,: <stdundefined:int: vectorreference,< intto, stdcv:std:::::_InputArrayallocator:<:allocator_InputArray<intint>(> > cv >const :const:&&Mat) ') const.'build_release&/make: lib )/*** [.build_release/tools/upgrade_net_proto_binary.bin] Error 1'. libcaffe.sobuild_release :classification.cpp/ :lib(undefined./textlibcaffe.so :+reference 0x787toundefined )google: :reference : protobufto:undefined: internalreference: :StringTypeHandlerBaseto:google :::Newprotobuf(:):'internal
cv.:build_release:/:lib:/StringTypeHandlerBaselibcaffe.so:_OutputArray:: :undefined_OutputArray :referenceNew( (to)cv'
:.google:::build_releaseprotobufMat:&:)'/UnknownFieldSetlib :/:classification.cppUnknownFieldSetlibcaffe.so(:)': (. build_releaseundefined/ lib./referencelibcaffe.so text:to +undefinedgoogle :reference:0x79a protobufto: :)UnknownFieldSetgoogle::::UnknownFieldSet :(protobufundefined::internal) :': referenceRepeatedPtrFieldBase.:build_release /:libto/Swaplibcaffe.so :( googleundefined: :referenceprotobuf :cv:tointernal:::: RepeatedPtrFieldBase_InputArray*)google:': ::.protobufbuild_release_InputArray/:(libcv::internal/::Matlibcaffe.so: :RepeatedPtrFieldBase :constundefined: &reference) Swapto'( google:google::protobuf::protobuf:
:internal:classification.cppio::::(CodedOutputStream.::text:+WriteVarint64ToArray0x7c7RepeatedPtrFieldBase()unsigned) :long',
unsigned. undefinedbuild_releasechar/ lib)reference'/
tolibcaffe.so .:build_releasecv/:lib/ libcaffe.so::_OutputArrayundefined :undefined : _OutputArrayreference (referencecvto :to: Mat &``)googlegoogle': :::protobufprotobuf:classification.cpp::UnknownFieldSet:::io:(~UnknownFieldSet:.(:text)+CodedOutputStream0x7da'): ::.WriteVarint64ToArray build_release(/lib/undefinedunsignedlibcaffe.so :long reference,undefined referencetounsigned tochar *``googlecv):::':_InputArrayprotobuf: ::_InputArray.:(iobuild_release:cv:/CodedOutputStreamlib:/:libcaffe.so::Mat: WriteVarint32FallbackToArray undefined(constunsigned& )int ,' reference.unsignedbuild_release / examplescharto*/) '
googlecpp_classification::/classification.oprotobuf: ::In UnknownFieldSet:function :collect2: error: ld returned 1 exit status
~UnknownFieldSetClassifier()::' SetMean(.std:build_release/:lib/string libcaffe.soconst: &)undefined 'reference : to classification.cpp:google(.text:+0x1635:protobuf)::: io:undefined :CodedOutputStreamreference to ::cvWriteVarint32FallbackToArray::(unsigned _OutputArray:int, unsigned char*:_OutputArray)'(cv :make: :Mat*** [.build_release/examples/siamese/convert_mnist_siamese_data.bin] Error 1&) ' classification.cpp:(.textcollect2: error: ld returned 1 exit status +0x1647): undefined reference to cv::merge(std::vector<cv::Mat, std::allocatorcv::Mat > const&, make: cv::* [.build_release/tools/test_net.bin] Error 1_OutputArray const&
)'
classification.cpp:(.text+0x165a): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)' .build_release/examples/cpp_classification/classification.o: In function main':
classification.cpp:(.text.startup+0x21f): undefined reference to cv::imread(std::string const&, int)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::SetTotalBytesLimit(int, int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream*, std::string*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::VarintSize32Fallback(unsigned int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::Skip(int)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadVarint64Fallback(unsigned long*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadTagFallback()' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::VarintSize64(unsigned long)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::Message::SpaceUsed() const' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadVarint32Fallback(unsigned int*)'
.build_release/lib/libcaffe.so: undefined reference to vtable for cv::_InputArray' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::GeneratedMessageReflection::GeneratedMessageReflection(google::protobuf::Descriptor const*, google::protobuf::Message const*, int const*, int, int, int, google::protobuf::DescriptorPool const*, google::protobuf::MessageFactory*, int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::StringTypeHandlerBase::Delete(std::string*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::kEmptyString'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(std::string const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::StringTypeHandlerBase::New()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::UnknownFieldSet()' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::RepeatedPtrFieldBase::Swap(google::protobuf::internal::RepeatedPtrFieldBase*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteVarint64ToArray(unsigned long, unsigned char*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::~UnknownFieldSet()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteVarint32FallbackToArray(unsigned int, unsigned char*)' collect2: error: ld returned 1 exit status make: *** [.build_release/examples/cpp_classification/classification.bin] Error 1 /usr/bin/ld: warning: libcudart.so.7.5, needed by /usr/local/lib/libopencv_cudabgsegm.so, may conflict with libcudart.so.8.0 .build_release/tools/caffe.o: In function train()':
caffe.cpp:(.text+0x1ab8): undefined reference to google::protobuf::internal::StringTypeHandlerBase::New()' .build_release/lib/libcaffe.so: undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::SetTotalBytesLimit(int, int)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream*, std::string*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::VarintSize32Fallback(unsigned int)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::Skip(int)'
.build_release/lib/libcaffe.so: undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadVarint64Fallback(unsigned long*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadTagFallback()' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::VarintSize64(unsigned long)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::Message::SpaceUsed() const' .build_release/lib/libcaffe.so: undefined reference to cv::imread(std::string const&, int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::ReadVarint32Fallback(unsigned int*)' .build_release/lib/libcaffe.so: undefined reference to vtable for cv::_InputArray'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::GeneratedMessageReflection::GeneratedMessageReflection(google::protobuf::Descriptor const*, google::protobuf::Message const*, int const*, int, int, int, google::protobuf::DescriptorPool const*, google::protobuf::MessageFactory*, int)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::StringTypeHandlerBase::Delete(std::string*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::kEmptyString' .build_release/lib/libcaffe.so: undefined reference to cv::imencode(std::string const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator >&, std::vector<int, std::allocator > const&)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::UnknownFieldSet()' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::RepeatedPtrFieldBase::Swap(google::protobuf::internal::RepeatedPtrFieldBase*)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteVarint64ToArray(unsigned long, unsigned char*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::~UnknownFieldSet()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteVarint32FallbackToArray(unsigned int, unsigned char*)' collect2: error: ld returned 1 exit status make: *** [.build_release/tools/caffe.bin] Error 1 /usr/bin/ld: warning: libcudart.so.7.5, needed by /usr/local/lib/libopencv_cudabgsegm.so, may conflict with libcudart.so.8.0 .build_release/lib/libcaffe.so: undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedInputStream::SetTotalBytesLimit(int, int)' .build_release/lib/libcaffe.so: undefined reference /to google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::iousr:/bin:CodedInputStream*/ld, std: :warning::string *)libcudart.so.7.5'
.build_release/lib/libcaffe.so: undefined reference, to neededgoogle by ::/protobuf:usr:io/local::/libCodedOutputStream::/libopencv_cudabgsegm.soVarintSize32Fallback(,unsigned int)may ' .build_release/libconflict /libcaffe.sowith/ :libcudart.so.8.0 .usrundefinedbuild_release// libbin/referencelibcaffe.so:/ ld :undefined toreferencewarning to: ``cv googlelibcudart.so.7.5:,:: _OutputArray::needed:protobuf_OutputArray (:cvby::: Matio&/):'usr :./build_releaseCodedInputStream/locallib//lib:/libcaffe.solibopencv_cudabgsegm.so:, :Skip mayundefined (conflictint ) ' referencewith .tobuild_release / liblibcudart.so.8.0
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.undefined build_release/lib/libcaffe.soreference: toundefined reference tovtable google::protobuffor::internal cv::StringTypeHandlerBase:::_InputArray:New()'
'.build_release
/lib./build_releaselibcaffe.so: undefined reference to/ libgoogle:/:protobuf:libcaffe.so:UnknownFieldSet: ::UnknownFieldSetundefined reference() 'to .build_release/lib/libcaffe.sogoogle: :undefined: referenceprotobuf to ::googleinternal::protobuf::internal::::RepeatedPtrFieldBaseGeneratedMessageReflection::Swap(google::::protobuf::GeneratedMessageReflectioninternal::(RepeatedPtrFieldBase*)' .build_releasegoogle/lib/::libcaffe.so: undefined referenceprotobuf to google:::protobuf:::io::CodedOutputStream:Descriptor:WriteVarint64ToArray (unsigned long, unsignedconst* char,)'
.google::build_release/protobuflib/:libcaffe.so:: undefined reference toMessage google:const:protobuf*::,UnknownFieldSet :int :~UnknownFieldSetconst*(),' int,.build_release /libint/libcaffe.so: undefined, reference to intgoogle,::protobuf ::iogoogle::CodedOutputStream:::protobuf:WriteVarint32FallbackToArray:(unsigned: int, unsignedDescriptorPool char )const'
, google::protobuf::MessageFactorycollect2: error: ld returned 1 exit status
, int)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::StringTypeHandlerBase::Delete(std::string*)' .build_release/lib/make: libcaffe.so: undefined reference *** [.build_release/tools/upgrade_solver_proto_text.bin] Error 1to google::protobuf::internal::kEmptyString'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(std::string const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::StringTypeHandlerBase::New()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::UnknownFieldSet()' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::RepeatedPtrFieldBase::Swap(google::protobuf::internal::RepeatedPtrFieldBase)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteVarint64ToArray(unsigned long, unsigned char*)' .build_release/lib/libcaffe.so: undefined reference to google::protobuf::UnknownFieldSet::~UnknownFieldSet()'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::io::CodedOutputStream::WriteVarint32FallbackToArray(unsigned int, unsigned char)'
collect2: error: ld returned 1 exit status
make: *** [.build_release/tools/compute_image_mean.bin] Error 1

[nicholasmireles]

This question potentially would be better asked in the Caffe repo. But, I had the same issue and the issue is that I was compiling Caffe with GCC 4.9 and the protobuf library I was using was compiled with something higher and there is a mismatch with the ABI. You can try compiling protobuf from source with the version of gcc that you're using, or building Caffe with a higher version of GCC (just not 5.5, because there's a known bug in that version that will break the compilation). For me, I used GCC 5.0 and then set this flag: "-D_GLIBCXX_USE_CXX11_ABI=0" since I compiled the NCCL library with a lower GCC version and I had a mangling error.