C++ g++ ld：找不到架构 x86_64 的符号
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g++ ld: symbol(s) not found for architecture x86_64
提问by mbPro
I'm trying to compile the Sam Hare's Struck code.
我正在尝试编译 Sam Hare 的Struck 代码。
I'm using mac OSX10.9, opencv 2.4.6 and Eigen 2.0.17.
我使用的是 mac OSX10.9、opencv 2.4.6 和 Eigen 2.0.17。
Eigen and opencv headers are stored in /opt/local/include while opencv dylib in /opt/local/lib.
Eigen 和 opencv 标头存储在 /opt/local/include 中，而 opencv dylib 存储在 /opt/local/lib 中。
I modified the Hare's Makefile to work on this folder. When I type make on the terminal:
我修改了 Hare 的 Makefile 来处理这个文件夹。当我在终端上输入 make 时：
g++ -L/opt/local/lib -lopencv_core -lopencv_highgui -lopencv_imgproc src/Config.o src/Features.o src/HaarFeature.o src/HaarFeatures.o src/HistogramFeatures.o src/ImageRep.o src/LaRank.o src/MultiFeatures.o src/RawFeatures.o src/Sampler.o src/Tracker.o src/main.o src/GraphUtils/GraphUtils.o -o struck
I get these errors:
我收到这些错误：
Undefined symbols for architecture x86_64:
"cv::namedWindow(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > const&,
int)", referenced from:
_main in main.o "cv::split(cv::Mat const&, std::__1::vector<cv::Mat, std::__1::allocator<cv::Mat> >&)",
referenced from:
ImageRep::ImageRep(cv::Mat const&, bool, bool, bool) in ImageRep.o "cv::imread(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > const&,
int)", referenced from:
_main in main.o "cv::imshow(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&,
cv::_InputArray const&)", referenced from:
LaRank::Debug() in LaRank.o
Tracker::Debug() in Tracker.o
_main in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see
invocation)
Any ideas? Thanks!
有任何想法吗？谢谢！
回答by Nate
I had a similar warning/error/failure when I was simply trying to make an executable from two different object files (main.o and add.o). I was using the command:
当我只是尝试从两个不同的目标文件（main.o 和 add.o）创建可执行文件时，我遇到了类似的警告/错误/失败。我正在使用命令：
gcc -o exec main.o add.o
gcc -o exec main.o add.o
But my program is a C++ program. Using the g++compiler solved my issue:
但我的程序是一个 C++ 程序。使用g++编译器解决了我的问题：
g++ -o exec main.o add.o
g++ -o exec main.o add.o
I was always under the impression that gcccould figure these things out on its own. Apparently not. I hope this helps someone else searching for this error.
我一直觉得自己gcc可以解决这些问题。显然不是。我希望这有助于其他人搜索此错误。
