ubuntu安装caffe：libopencv_core.so.3.4: error adding symbols: DSO missing from command line
caffe的安装方法参考此博客https://blog.csdn.net/A_Z666666/article/details/72853346
运行make all时报错：
~/caffe$ make all -j4
CXX/LD -o .build_release/examples/cpp_classification/classification.bin
/usr/bin/ld: warning: libopencv_core.so.3.4, needed by //usr/local/lib/x86_64-linux-gnu/libopencv_imgcodecs.so, may conflict with libopencv_core.so.2.4
/usr/bin/ld: .build_release/examples/cpp_classification/classification.o: undefined reference to symbol '_ZN2cv6String10deallocateEv'
//usr/local/lib/x86_64-linux-gnu/libopencv_core.so.3.4: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make: *** [.build_release/examples/cpp_classification/classification.bin] Error 1
可能原因：
1）没有创建libopencv_core.so.3.4的软链接
解决方法：
到opencv的安装路径下，复制libopencv_core.so，libopencv_core.so.3.4还有libopencv_core.so.3.4.4到/usr/local/lib/x86_64-linux-gnu
注意：因为我的版本是3.4.4，具体情况可能和版本号不同而不同，自己注意修改
我抛出来的错的路径是/usr/local/lib/x86_64-linux-gnu，这个路径也可能不同，自己注意修改
创建软连接：
$ sudo chmod +r libopencv_core.so.3.4.4
$ sudo ln -sf libopencv_core.so.3.4.4 libopencv_core.so.3.4
$ sudo ln -sf libopencv_core.so.3.4 libopencv_core.so
$ sudo ldconfig终端输入ll检测一下，出现以下链接说明成功，可以再make all尝试
lrwxrwxrwx 1 root root 21 11月 22 11:23 libopencv_core.so -> libopencv_core.so.3.4
lrwxrwxrwx 1 root root 23 11月 22 11:22 libopencv_core.so.3.4 -> libopencv_core.so.3.4.4
-rw-r--r-- 1 root root 19269952 11月 22 11:19 libopencv_core.so.3.4.4
2）Makefile.config中没有加路径
解决方法：直接添加
~/caffe$ sudo gedit Makefile.config
# Whatever else you find you need goes here.
INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib /usr/local/lib/x86_64-linux-gnu
保存退出，make all
我是做了以上两步才解决的
运行make runtime时报错：
$ make runtime -j4
.build_release/tools/caffe
.build_release/tools/caffe: error while loading shared libraries: libopencv_imgproc.so.3.4: cannot open shared object file: No such file or directory
make: *** [runtest] Error 127
解决方法：在本地路径找到缺失的文件的地址，如果没找到，就从caffe安装地址复制过去，终端输入地址
sudo ldconfig /usr/local/lib/x86_64-linux-gnu后续安装TensorFlow1.6.0报错：
$ python
Python 2.7.6 (default, Oct 26 2016, 20:30:19)
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tensorflow as tf
Traceback (most recent call last):
File "", line 1, in
File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/__init__.py", line 24, in
from tensorflow.python import *
File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 75, in
from tensorflow.core.framework.graph_pb2 import *
File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/core/framework/graph_pb2.py", line 9, in
from google.protobuf import symbol_database as _symbol_database
File "/usr/local/lib/python2.7/dist-packages/google/protobuf/symbol_database.py", line 165, in
_DEFAULT = SymbolDatabase(pool=descriptor_pool.Default())
AttributeError: 'module' object has no attribute 'Default' 原因：protobuf版本原因
1、确认自己的protobuf版本是否匹配，我是tf1.6.0，需要对应3.4.0以上版本，我就安装了protobuf3.4.0
2、在/usr/lib/python2.7中查找一下有没有安装protobuf2，就直接搜索，然后全部手动删除
自己pip安装的protobuf3是在/usr/local/lib/python2.7/dist-packages中，因此会出现版本有冲突
参考这个回复