Undefined reference to google protobuf

[snavavf]

I got these errors saying there are undefined reference to google protobuf when make all in caffe dir.
I wonder which file (like the Makefile?) I should modify, or where I should set up in my system.

I've already installed protobuf as the command provided in the link, and installed libprotobuf-dev and protobuf-compiler on my Ubuntu 14.04.

CXX/LD -o .build_release/tools/convert_imageset.bin
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::io::CodedOutputStream::WriteVarint64ToArray(unsigned long long, unsigned char*)'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::internal::WireFormatLite::WriteInt64(int, long long, google::protobuf::io::CodedOutputStream*)'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::UnknownFieldSet::AddVarint(int, unsigned long long)'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::io::CodedOutputStream::VarintSize64(unsigned long long)'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::io::CodedOutputStream::WriteVarint64(unsigned long long)'
collect2: error: ld returned 1 exit status
make: *** [.build_release/tools/convert_imageset.bin] Error 1

[shibuyanorailgun]

If you are using Ubuntu, maybe this will help:

sudo apt-get install libprotobuf-dev protobuf-compiler

[snavavf]

I have already installed libprotobuf-dev and protobuf-compiler on my Ubuntu 14.04 yet still get those error messages.

[shibuyanorailgun]

Perhaps add -pthread -lprotobuf -lpthread will do.

nr@linux ~ % pkg-config --libs protobuf
-pthread -lprotobuf -lpthread

[snavavf]

@shibuyanorailgun I don't quite understand...
I think -lprotobuf is already handled at line 172 and line 364 at Makefile,

LIBRARIES += glog gflags protobuf leveldb snappy \
    lmdb boost_system hdf5_hl hdf5 m \
    opencv_core opencv_highgui opencv_imgproc

LDFLAGS += $(foreach librarydir,$(LIBRARY_DIRS),-L$(librarydir)) $(PKG_CONFIG) \
        $(foreach library,$(LIBRARIES),-l$(library))

and -pthread is handled at line 352.

CXXFLAGS += -pthread -fPIC $(COMMON_FLAGS) $(WARNINGS)

I tried to edit line 172 to

LIBRARIES += glog gflags protobuf leveldb snappy \
    lmdb boost_system hdf5_hl hdf5 m \
    opencv_core opencv_highgui opencv_imgproc pthread

but that doesn't help.

I don't know much about Makefile, so maybe I misunderstood. Could you explain more about how to compile it right?

[shibuyanorailgun]

= =, I'm sorry I can't figure out what happend.

[cwlseu]

I encountered trouble alike
I encountered trouble alike, see buildlog as follow:
PROTOC src/caffe/proto/caffe.proto
make: protoc: Command not found
make: *** [.build_release/src/caffe/proto/caffe.pb.h] Error 127

thanks for your answer @shibuyanorailgun

[antran89]

Hi @snavavf, @cwlseu,
[UPDATED, DO NOT TRY THIS]Please try to remove the os versions of protobuf in /usr/lib/x86_64-linux-gnu. (Something like libprotobuf.*, libprotobuf-lite.*, libprotoc.*). There are two versions of protobuf will cause conflicts when compiling.
Then try to install newest version of protobuf.

Better versions: [UPDATED, TRY THIS] Instead of my bad advice on deleting with system files, we can remove development files of libprotobuf but still keep library files in /usr/lib/x86_64-linux-gnu by this command

apt-get remove libprotobuf-dev

Then try to install newest version of protobuf.

[snavavf]

Thanks @howtobeahacker !
That works.

[afarbos]

Can you explain me the solution? I am not sure to understand and I have a similar problem.

[tinoue]

FYI: This seems to be a perfect solution for me.
http://stackoverflow.com/questions/10404027/cant-compile-example-from-google-protocol-buffers

[ferrouswheel]

Advising people to delete system libraries isn't an ideal solution.

I tried to remove protobuf-lite in ubuntu 15.10 with sudo apt-get remove libprotobuf-lite9v5 (because I don't want to break my system) but it tries to remove 205 other packages (including my desktop).

Googling about this reminded me that I had previously tryed to make CUDA work by changing to gcc 4.9. Unfortunately the c++ ABI changed so compiling stuff with 4.9 and trying to link to system libraries built with gcc 5 won't work.

On the mailing list people are suggesting to remove the gcc 5 error from the CUDA header /usr/local/cuda/include/host_config.h.

[wadefelix]

remove the gcc 5 error from the CUDA header host_config.h
it works!

[jay-to-the-dee]

This appears to be a prevalent issue ob Ubuntu 15.10! Caffe used to work fine on 15.04! Also I'm using CUDA 7.5 so in theory I should be fine for the GCC version issue!

[netom]

Hi, Ubuntu 15.10 user here. Had the same issue, solved by patching CUDA (/usr/local/cuda/include/host_config.h).

Diff:

< #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 9)
---
> //#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 9)
115c115
< #error -- unsupported GNU version! gcc versions later than 4.9 are not supported!
---
> //#error -- unsupported GNU version! gcc versions later than 4.9 are not supported!
117c117
< #endif /* __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 9) */
---
> //#endif /* __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 9) */

[michaeljs1990]

apparently someone called hottobeahacker solved this but i don't see that user or comment anymore. Could anyone enlighten me?

[antran89]

@michaeljs1990 It's me, I just changed my name. See my first comment in the thread, it might help you avoid the problem.

[michaeljs1990]

@antran89 thanks for the response. Unfortunately I have to use protoc 2.5 with my project so that is a no go for me. It seems that this library no longer works with the stock ubuntu 14.04 packages and the website contains incorrect information for building this package as well.

[muzhi93]

@antran89 Hi,following your guidance,I've successfully compiled Caffe,but there is another problem arising:when I reboot my machine,the leftside toolbar of my ubuntu 14.04 desktop is gone,then I typed ccsm in the command window,which reported an error,ImportError: libprotobuf.so.8: cannot open shared object file: No such file or directory.I wonder whether it is because I deleted the OS's protobuf file that lead to the breakdown of my desktop?

[Holdlen2DH]

I encounter this problem too, but don't how to fix it

[wenwei202]

This one works for me, in Ubuntu 16.04:

1. Configure /usr/local/cuda/include/host_config.h as suggested.
2. sudo apt-get autoremove libprotobuf-dev protobuf-compiler
3. then compile the protobuf-2.5.0 from src and install
   Please config the gcc when you compile protobuf
   ./configure --prefix=/usr/local/ CC=/usr/bin/gcc

[admercs]

This still fails to link to protobuf on the latest Ubuntu 16.04 LTS with gcc-4.9 (apt-get install gcc-4.9 g++-4.9) and many versions of protobuf tried.

[groakat]

for me this problem was caused because I had protobuf installed in anaconda. If you have protobuf installed in your anaconda environment, you have to remove all files by hand, as conda uninstall protobuf does not remove all the library files.

[hjc1028]

@antran89 删了libprotobuf-lite.so 之后进不了桌面，这个问题弄了三天

[hjc1028]

@wenwei202 It works

[bragilee]

@antran89 Hi, I recently moved on the caffe. I encountered this problem on the ArchLinux. I am not quite familiar with caffe and protobuf so I do not quite understand how this problem happens. Could you help me? Thank you so much.

[antran89]

@bragilee Sorry, I do not know how to fix safely. Some distributions of Linux have two version of Protobuf. You should figure out how to make Caffe only recognize one version of Protobuf. Sorry, my recommendations are not good. Please try out the methods of other people. Now it works fine for me all the time. I also do not know why they have this problem.

[bragilee]

@antran89 Thank you so much for your help. I will seek other methods. :)

[Anymake]

@samuelcesc thank you , “conda remove libprotobuf” is the right solution！

[huzqujm]

To me, install protobuf from source and copy its library to anaconda can solver this problem. [Notice: keep two protobuf version the same]
I install protobuf from source and keep its version the same as anaconda's protobuf. But I still get thiss error message. If I remove ptotobuf which installed by me and It still return this message. I cannot remove anaconda's protobuf. So I copy system's protobuf(compiled and installed from source) to anaconda's lib and it works...

I fell confused. Anaconda's protobuf is not a complete version of protobuf? I forgot to compare two protobuf versions' file size...

update:

huzhan@huzhan  ~/package  ll /usr/local/lib | grep protobuf
-rw-r--r-- 1 root root 72664964 Dec 29 19:19 libprotobuf.a
-rwxr-xr-x 1 root root 971 Dec 29 19:19 libprotobuf.la*
-rw-r--r-- 1 root root 8276882 Dec 29 19:19 libprotobuf-lite.a
-rwxr-xr-x 1 root root 1006 Dec 29 19:19 libprotobuf-lite.la*
lrwxrwxrwx 1 root root 26 Dec 29 19:19 libprotobuf-lite.so -> libprotobuf-lite.so.14.0.0*
lrwxrwxrwx 1 root root 26 Dec 29 19:19 libprotobuf-lite.so.14 -> libprotobuf-lite.so.14.0.0*
-rwxr-xr-x 1 root root 3382056 Dec 29 19:19 libprotobuf-lite.so.14.0.0*
lrwxrwxrwx 1 root root 21 Dec 29 19:19 libprotobuf.so -> libprotobuf.so.14.0.0*
lrwxrwxrwx 1 root root 21 Dec 29 19:19 libprotobuf.so.14 -> libprotobuf.so.14.0.0*
-rwxr-xr-x 1 root root 27738776 Dec 29 19:19 libprotobuf.so.14.0.0*
huzhan@huzhan  ~/package  ll ~/anaconda2/lib | grep protobuf
-rw-rw-r-- 2 huzhan huzhan 5478328 Nov 16 05:44 libprotobuf.a
-rwxrwxr-x 1 huzhan huzhan 1012 Dec 30 01:02 libprotobuf.la*
-rw-rw-r-- 2 huzhan huzhan 689960 Nov 16 05:44 libprotobuf-lite.a
-rwxrwxr-x 1 huzhan huzhan 1047 Dec 30 01:02 libprotobuf-lite.la*
lrwxrwxrwx 1 huzhan huzhan 26 Dec 30 01:02 libprotobuf-lite.so -> libprotobuf-lite.so.14.0.0*
lrwxrwxrwx 1 huzhan huzhan 26 Dec 30 01:02 libprotobuf-lite.so.14 -> libprotobuf-lite.so.14.0.0*
-rwxrwxr-x 2 huzhan huzhan 422392 Nov 16 05:44 libprotobuf-lite.so.14.0.0*
lrwxrwxrwx 1 huzhan huzhan 21 Dec 30 01:02 libprotobuf.so -> libprotobuf.so.14.0.0*
lrwxrwxrwx 1 huzhan huzhan 21 Dec 30 01:02 libprotobuf.so.14 -> libprotobuf.so.14.0.0*
-rwxrwxr-x 2 huzhan huzhan 3126080 Nov 16 05:44 libprotobuf.so.14.0.0*

These two libs are not the same one even if they are the same version..
anaconda's protobuf will not work after copy system's lib to anaconda

[YerongLi]

Actually I think all the undefined error has something to do with the gcc/g++ version on ubuntu side, simple test can be done on the protobuf(https://github.com/google/protobuf/tree/master/src)
If we build protobuf with g++4.7 then caffe with g++5.4, and then caffe cannot find protobuf as a result.
And building protobuf with g++4.7 then caffe with g++4.7, and then caffe can at leat find protobuf...

I am not sure whether downgrading gcc/g++4.7 beforehand is a good option for build caffe.

[yinyanting]

@zchrissirhcz
I change gcc from 4.9 to 5, and I can build caffe successfully. I have same ubuntu,gcc,and cuda

[ZubairKhan001]

i have compiled caffe on Ubuntu 16.04 LTS both with python 2 and python, it is really a hectic process for beginners, for caffe with python 2.7 make sure that your /.local/lib/python2.7/site-packages only contains a version same as you protoc version. protoc version can be checked by entering
protoc --version
for me i got problems with python 2.7 because by mistake i installed protbuf 3.0 alpha in python 2.7 site packages, so there was a protobuf error after removing it from python 2.7 site packages everything worked fine
also install python-dev version
apt-get install the python3.x-dev
and for python 3.5 make sure you have python 3.0 alpha, if you have both python 2.7 and python 3.x in the system use pip3 otherwise use pip

pip3 install protobuf==3.0.0-alpha-3

or another protobuf such as 3.5 version of protobuf.
also do this
pip3 install python-dateutil --upgrade
after that do
make clean
make all
make runtest
make pycaffe
after performing make all make runtest steps don't forget to do that
sudo ldconfig

hope everything works OK for you.

[ZubairKhan001]

i have compiled caffe on Ubuntu 16.04 LTS both with python 2 and python, it is really a hectic process for beginners, for caffe with python 2.7 make sure that your /.local/lib/python2.7/site-packages only contains a version same as you protoc version. protoc version can be checked by entering
protoc --version
for me i got problems with python 2.7 because by mistake i installed protbuf 3.0 alpha in python 2.7 site packages, so there was a protobuf error after removing it from python 2.7 site packages everything worked fine
also install python-dev version
apt-get install the python3.x-dev
and for python 3.5 make sure you have python 3.0 alpha, if you have both python 2.7 and python 3.x in the system use pip3 otherwise use pip

pip3 install protobuf==3.0.0-alpha-3

or another protobuf such as 3.5 version of protobuf.
also do this
pip3 install python-dateutil --upgrade
after that do
make clean
make all
make runtest
make pycaffe
after performing make all make runtest steps don't forget to do that
sudo ldconfig

hope everything works OK for you.

[AustinVan]

My solution is to change the INCLUDE_DIRS and LIBRARY_DIRS in Makefile.config.
Note that the detailed protoc path is necessary.

In my case,
protoc lib path is : /home/tools/protobuf.3.4/lib (change according to your location)
protoc include path is : /home/tools/protobuf.3.4/include (change according to your location)

After my modification, my makefile is:
INCLUDE_DIRS := $(PYTHON_INCLUDE) /home/tools/protobuf.3.4/include /usr/local/include
LIBRARY_DIRS := $(PYTHON_LIB) /home/tools/protobuf.3.4/lib /usr/local/lib /usr/lib

Note that the protoc need to be in front of the default paths

[hana9090]

For UBUNTU 17.10, CUDA 8 and cUDNN 5 what is the best solution for the same error :(
protoc --version : libprotoc 3.5.1
Which one should I follow?

[cuixiaodao]

ubuntu 16.04, problem solved by compiling protobuf 2.5.0 using gcc-4.8.

[amitfishy]

I was able to install and run on Cuda 9.0 with protobuf 3.5.1.
The following worked for me:
Installed protobuf following this
This stored my proto.so files in /usr/local/lib
I followed the instructions here after that for using it on python

I still got the undefined reference error. On looking further there were some old proto.so files in /usr/lib/x86_64-linux-gnu which were present there from before using the deb installation. The problem was that it was picking up these files during the caffe build as opposed to the .so files that I had installed from source.
Do not delete the older .so files (my PC wouldn't reboot when I did so), instead in the makefile.config, put the directory which contains your source based .so files (/usr/local/lib in my case - default for source installation) in the beginning so it will take that and build with that instead of your older proto file location (/usr/lib/x86_64-linux-gnu - which I put in $PYTHON_LIB).

LIBRARY_DIRS := /usr/local/lib $(PYTHON_LIB) /usr/lib /usr/lib/x86_64-linux-gnu/hdf5/serial

Doing so removed the undefined reference error for me. It is mot likely due to conflict in existing version of protobuf that you have in your system.
One of the other major issues I encountered while trying protobuf v3.5.1 was related to c++11, which I was able to fix following this.

[g10guang]

gcc `pkg-config --libs --clfags protobuf` you command

[kongcong]

If you are using Ubuntu, maybe this will help:

sudo apt-get install libprotobuf-dev protobuf-compiler

it can't help

[stonyhu]

@groakat Exactly! It works! This error is indeed caused by the conflict of anaconda installed libprotobuf and apt installed libprotobuf. So the final solution is that you need to uninstall all libprotobuf of anaconda, and then installed libprotobuf-dev and protobuf-compiler by apt!

[tulha]

I encounter same problem.

System: ubuntu16.04
cuda: 8.0.44
gcc: 4.9

I have installed matlab2016b, which contains a libprotobuf.so.8, while I use apt-get install libprotobuf-dev gives libprotobuf.so.9, maybe this is the source of conflict. However, when I remove all the libprotobuf.so files under MATLAB installation folder, I do make clean; make -j8 still gives same problem.

Finally, I change gcc from 4.9 to 5, and this time I can build caffe successfully. Just don't sure if I dont't remove Matlab folders' libprotobu.so files can Caffe be build successuflly.

I have MATLAB installed as well and the libprotobuf.so.9 files are present in the MATLAB folder for me too. However, I can confirm that the source of conflict is not this. Changing the gcc version from 4.9 to 5 solved the problem for me! (Y)

[northeastsquare]

in caffe makefile line 262:
ifeq ($(LINUX), 1)
CXX ?= /usr/bin/g++
GCCVERSION := $(shell $(CXX) -dumpversion | cut -f1,2 -d.)
# older versions of gcc are too dumb to build boost with -Wuninitalized
ifeq ($(shell echo | awk '{exit $(GCCVERSION) < 4.6;}'), 1)
WARNINGS += -Wno-uninitialized
endif
# boost::thread is reasonably called boost_thread (compare OS X)
# We will also explicitly add stdc++ to the link target.
LIBRARIES += boost_thread stdc++
VERSIONFLAGS += -Wl,-soname,$(DYNAMIC_VERSIONED_NAME_SHORT) -Wl,-rpath,$(ORIGIN)/../lib
endif

but I compile protobuf with /usr/local/bin/g++
Also, recompile gflags, glog

[sunshuhuai]

libprotobuf.so

I encounter same problem.

System: ubuntu16.04
cuda: 8.0.44
gcc: 4.9

I have installed matlab2016b, which contains a libprotobuf.so.8, while I use apt-get install libprotobuf-dev gives libprotobuf.so.9, maybe this is the source of conflict. However, when I remove all the libprotobuf.so files under MATLAB installation folder, I do make clean; make -j8 still gives same problem.

Finally, I change gcc from 4.9 to 5, and this time I can build caffe successfully. Just don't sure if I dont't remove Matlab folders' libprotobu.so files can Caffe be build successuflly.

I have the same situation as you.I tried a lot of methods, and finally I uninstalled gcc directly and then reinstalled it.

sudo apt-get build-dep gcc
sudo apt-get remove gcc

[charles-loomai]

Tried almost all the answers above.
The best is @zchrissirhcz, very convenient, wont remove anything, wont break anything, only need to install gcc-5 via apt install gcc-5 g++-5

1. switching to gcc-5 via ln -sf /usr/bin/gcc-5 /usr/bin/gcc and ln -sf /usr/bin/g++-5 /usr/bin/g++,
2. then run make clean, make -j10.
3. [optional] switching back to your previous gcc

my OS is ubuntu 18.04(Linux Mint19.1), cuda9.0, cudnn7.0, RTX2080 Ti
cheers

[amolkumarpatil]

Tried almost all the answers above.
The best is @zchrissirhcz, very convenient, wont remove anything, wont break anything, only need to install gcc-5 via apt install gcc-5 g++-5

1. switching to gcc-5 via ln -sf /usr/bin/gcc-5 /usr/bin/gcc and ln -sf /usr/bin/g++-5 /usr/bin/g++,
2. then run make clean, make -j10.
3. [optional] switching back to your previous gcc

my OS is ubuntu 18.04(Linux Mint19.1), cuda9.0, cudnn7.0, RTX2080 Ti
cheers

Works for ubuntu 18.04 [confirmed]

[gongshichina]

A small tip may help you :）
Confirm that your lib and include file for protobuf correspond, in Makefile.config
INCLUDE_DIRS := $(PYTHON_INCLUDE) $HOME/anaconda3/include /usr/local/include
LIBRARY_DIRS := $(PYTHON_LIB) $HOME/anaconda3/lib /usr/local/lib /usr/lib

That is to say, if your google/protobuf/include comes from $HOME/anaconda3/include, then .so/.a files must comes from $HOME/anaconda3/lib , keeping both version correspond.

[cannguyen275]

Tried almost all the answers above.
The best is @zchrissirhcz, very convenient, wont remove anything, wont break anything, only need to install gcc-5 via apt install gcc-5 g++-5

1. switching to gcc-5 via ln -sf /usr/bin/gcc-5 /usr/bin/gcc and ln -sf /usr/bin/g++-5 /usr/bin/g++,
2. then run make clean, make -j10.
3. [optional] switching back to your previous gcc

my OS is ubuntu 18.04(Linux Mint19.1), cuda9.0, cudnn7.0, RTX2080 Ti
cheers

Ubuntu 18.04, too. But this solution doesn't work.
I'm using gcc/g++ 7.4.0, anaconda3 environment. This gcc version seems to bring me further than gcc 5, gcc5 end up with error in the very first of the installation process.
Here is the error with gcc/g++ 7.4.0:

[ 65%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/hdf5.cpp.o
[ 65%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/im2col.cpp.o
[ 67%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/im_transforms.cpp.o
[ 67%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/insert_splits.cpp.o
[ 68%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/io.cpp.o
[ 68%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/math_functions.cpp.o
[ 70%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/sampler.cpp.o
[ 70%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/signal_handler.cpp.o
[ 70%] Building CXX object src/caffe/CMakeFiles/caffe.dir/util/upgrade_proto.cpp.o
[ 71%] Linking CXX shared library ../../lib/libcaffe.so
[ 71%] Built target caffe
Scanning dependencies of target convert_imageset
[ 71%] Building CXX object tools/CMakeFiles/convert_imageset.dir/convert_imageset.cpp.o
[ 73%] Linking CXX executable convert_imageset
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::internal::ArenaImpl::AllocateAlignedAndAddCleanup(unsigned long, void (*)(void*))'
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::RepeatedField<float>::Add(float const&)'
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::internal::AddDescriptors(google::protobuf::internal::DescriptorTable const*)'
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::RepeatedField<unsigned int>::~RepeatedField()'
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::internal::WireFormatLite::UInt32Size(google::protobuf::RepeatedField<unsigned int> const&)'
....I remove because it's too long :))
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::RepeatedPtrField<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::~RepeatedPtrField()'
../lib/libcaffe.so.1.0.0-rc3: undefined reference to `google::protobuf::RepeatedPtrField<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Add(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&)'
collect2: error: ld returned 1 exit status
tools/CMakeFiles/convert_imageset.dir/build.make:135: recipe for target 'tools/convert_imageset' failed
make[2]: *** [tools/convert_imageset] Error 1
CMakeFiles/Makefile2:441: recipe for target 'tools/CMakeFiles/convert_imageset.dir/all' failed
make[1]: *** [tools/CMakeFiles/convert_imageset.dir/all] Error 2
Makefile:129: recipe for target 'all' failed

[anushreehede]

I am struggling with similar errors as @cannguyen275 . Could someone please help out with this issue? I need it to work a bit urgently. I'm working with Debian 9. Would really appreciate the help!

[leondgarse]

I solved my problem by compiling and installing the corresponding protobuf version with anaconda one from protobuf releases.

$ locate libprotobuf  # List only those matters
# /opt/anaconda3/pkgs/libprotobuf-3.11.4-hd408876_0/lib/libprotobuf.so
# /opt/anaconda3/lib/libprotobuf.so.22
# /usr/local/lib/libprotobuf.so
# /usr/local/lib/libprotobuf.so.22

$ ls /usr/local/lib/libprotobuf.so -l
# /usr/local/lib/libprotobuf.so -> libprotobuf.so.22.0.4

• When set using anaconda in Makefile.config, libprotobuf version in system should match with anaconda one.
• Download the matched protobuf release protobuf-cpp-xxx.tar.gz / protobuf-cpp-xxx.zip from protobuf releases.
• Extract and compile.

cd protobuf-3.11.4
./autogen.sh
./configure
make
make check
sudo make install
sudo ldconfig
pkg-config --cflags --libs protobuf

I have my own compiling caffe on Ubuntu 20.04, python3.8 issues summary here.

[aabolfazl]

Cmake link command

target_link_libraries(protoTest LINK_PUBLIC -pthread -lprotobuf -lpthread)

[enternityFan]

apt-get remove libprotobuf-dev

thank u very much!!!!!!!!!!it 's very very helpful for me!

[enternityFan]

apt-get remove libprotobuf-dev

thank u very much!!!!!!!!!!it 's very very helpful for me!

[dragonQian]

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