Created by: guoqiang0148666

您好，非常感谢您们能分享这么杰出的工作．

我在编译C++版detection_demo出现链接gflag,protobuf库文件错误，log信息如下：

[100%] Linking CXX static library /media/guo/DataUbuntu/paddlepaddle/PaddleDetection/inference/build/ext/yaml-cpp/lib/libyaml-cpp.a
[100%] Built target yaml-cpp
[ 46%] No install step for 'ext-yaml-cpp'
[ 53%] Completed 'ext-yaml-cpp'
[ 53%] Built target ext-yaml-cpp
Scanning dependencies of target libpaddleseg_inference
[ 60%] Building CXX object CMakeFiles/libpaddleseg_inference.dir/preprocessor/preprocessor.cpp.o
[ 66%] Building CXX object CMakeFiles/libpaddleseg_inference.dir/preprocessor/preprocessor_detection.cpp.o
[ 73%] Building CXX object CMakeFiles/libpaddleseg_inference.dir/utils/detection_result.pb.cc.o
[ 80%] Building CXX object CMakeFiles/libpaddleseg_inference.dir/predictor/detection_predictor.cpp.o
[ 86%] Linking CXX static library libpaddleseg_inference.a
[ 86%] Built target libpaddleseg_inference
Scanning dependencies of target detection_demo
[ 93%] Building CXX object CMakeFiles/detection_demo.dir/detection_demo.cpp.o
[100%] Linking CXX executable detection_demo
CMakeFiles/detection_demo.dir/detection_demo.cpp.o: In function `__static_initialization_and_destruction_0(int, int)':
detection_demo.cpp:(.text+0x39e): undefined reference to `google::FlagRegisterer::FlagRegisterer<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(char const*, char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)'

在最后的detection_demo链接时出现了找不到gflag,protobuf(protobuf错误log未截出)库文件(因为前面的链接库文件成功了)，我怀疑是和本机的相关库文件冲突了，但不知道是否正确，以及如何解决，希望某位大神能帮帮我，谢谢了．

下面的是detection_demo_dir的flags.make,link.txt文件． flags.make

# CMAKE generated file: DO NOT EDIT!
# Generated by "Unix Makefiles" Generator, CMake Version 3.5

# compile CXX with /usr/bin/c++
CXX_FLAGS =  -o2 -std=c++11  

CXX_DEFINES = -DUSE_MKL

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-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/install/protobuf/include
 -I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/install/glog/include 
-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/install/gflags/include -I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/install/xxhash/include 
-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/install/zlib/include -I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/boost 
-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/third_party/eigen3
-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/fluid_inference/paddle/include 
-I/media/guo/DataUbuntu/paddlepaddle/PaddleDetection/opencv3_install/include 
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link.txt

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