OpenCV 2.4.1未定义的引用
OpenCV 2.4.1 undefined references
我最近按照本教程在运行Ubuntu 12.04(64位)的桌面上安装了OpenCV 2.4.1,但是每次我尝试编译代码时,即使包含使用预构建编译脚本的示例,我也会从cv
命名空间获得关于每个函数的未定义引用。
我目前试图编译的代码是OpenCV文档中的这个例子。我尝试了3种不同的方法来编译这段代码:
I-使用CMake,按照文档网站的指示;
II-使用gcc和pkg-config命令:
gcc `pkg-config --cflags opencv` display_image.cpp `pkg-config --libs opencv` -o DisplayImage
III-使用我自己的makefile并直接添加库和头路径:
CC = g++
INCLUDE = -I/usr/local/include -I/usr/local/include/opencv
LIBS = -L/usr/local/lib -lopencv_core -lopencv_highgui
%: %.cpp
$(CC) -o $@ $< $(INCLUDE) $(LIBS)
它们都产生相同的输出:
/tmp/ccufJQVm.o: In function `main':
display_image.cpp:(.text+0x9b): undefined reference to `cv::imread(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
display_image.cpp:(.text+0x13f): undefined reference to `cv::namedWindow(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
display_image.cpp:(.text+0x1a1): undefined reference to `cv::imshow(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)'
collect2: ld returned 1 exit status
make: *** [display_image] Error 1
我发现了一些与我相关的其他问题,但他们的解决方案都不适合我。我真的很想了解是什么导致了这些未定义的引用,因为所有的库和头文件都在它们应该在的地方。
任何形式的帮助都会以我永恒的爱和感激来回报。H546163809H添加一些命令的回显以澄清问题:
$pkg-config --cflags opencv
-I/usr/local/include/opencv -I/usr/local/include
$pkg-config --libs opencv
/usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_ts.so /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so
现在添加一个更详细的编译输出(使用-Wall和-v)
g++ -v -Wall -o display_image display_image.cpp -I/usr/local/include -I/usr/local/include/opencv -L/usr/local/lib -lopencv_core -lopencv_highgui
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
COLLECT_GCC_OPTIONS='-v' '-Wall' '-o' 'display_image' '-I' '/usr/local/include' '-I' '/usr/local/include/opencv' '-L/usr/local/lib' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.6/cc1plus -quiet -v -I /usr/local/include -I /usr/local/include/opencv -imultilib . -imultiarch x86_64-linux-gnu -D_GNU_SOURCE display_image.cpp -quiet -dumpbase display_image.cpp -mtune=generic -march=x86-64 -auxbase display_image -Wall -version -fstack-protector -o /tmp/ccDB7q8G.s
GNU C++ (Ubuntu/Linaro 4.6.3-1ubuntu5) version 4.6.3 (x86_64-linux-gnu)
compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory "/usr/local/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include/opencv
/usr/include/c++/4.6
/usr/include/c++/4.6/x86_64-linux-gnu/.
/usr/include/c++/4.6/backward
/usr/lib/gcc/x86_64-linux-gnu/4.6/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.6/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++ (Ubuntu/Linaro 4.6.3-1ubuntu5) version 4.6.3 (x86_64-linux-gnu)
compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 65b5171ac1bd7b3f07dbea6bdb24be3d
COLLECT_GCC_OPTIONS='-v' '-Wall' '-o' 'display_image' '-I' '/usr/local/include' '-I' '/usr/local/include/opencv' '-L/usr/local/lib' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
as --64 -o /tmp/cchdK0Uq.o /tmp/ccDB7q8G.s
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.6/:/usr/lib/gcc/x86_64-linux-gnu/4.6/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.6/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.6/:/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-Wall' '-o' 'display_image' '-I' '/usr/local/include' '-I' '/usr/local/include/opencv' '-L/usr/local/lib' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.6/collect2 --sysroot=/ --build-id --no-add-needed --as-needed --eh-frame-hdr -m elf_x86_64 --hash-style=gnu -dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro -o display_image /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.6/crtbegin.o -L/usr/local/lib -L/usr/lib/gcc/x86_64-linux-gnu/4.6 -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../.. /tmp/cchdK0Uq.o -lopencv_core -lopencv_highgui -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/4.6/crtend.o /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crtn.o
/tmp/cchdK0Uq.o: In function `main':
display_image.cpp:(.text+0x9b): undefined reference to `cv::imread(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
display_image.cpp:(.text+0x13f): undefined reference to `cv::namedWindow(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
display_image.cpp:(.text+0x1a1): undefined reference to `cv::imshow(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)'
collect2: ld returned 1 exit status
make: *** [display_image] Error 1
我猜您缺少一些* -dev
包。教程一开始就列出了一大堆错误,根据我的经验,这些错误通常是导致编译失败的直接原因。不幸的是,您可以从编译器获得间接消息。我猜您提到的错误消息只是构建输出的尾部,这可能远远不是真正的原因。你要做的是重定向构建输出(与tee
你可以分割它,看到它在控制台上,并得到一个构建日志太),或者你已经有一个构建日志。研究该构建日志并查看在编译过程中出现的第一个或第二个错误消息。这样可以更好地指示缺少的库或开发包。这只是一个猜测,指导方针。向我们提供整个构建日志。如果输出很短,请尝试增加输出的篇幅。还有,我可能完全错了。
- libpng12-dev
- libpng + + - dev
- libpng3
- libpnglite-dev
- libpngwriter0-dev
- zlib1g-dbg
- zlib1g-dev
- pngtools
- libjpeg8-dev
- libjpeg8-dbg
- libjpeg-progs ffmpeg
- libgstreamer0。xy-0-dbg (xy应该是Ubuntu 12.04的版本,可能比Ubuntu 11.04的0.10版本更新)
- libgstreamer0.xy-dev
- libxine-dev
- libunicap2-dev
- 痛饮
- libdc1394-utils
在安装它们之前,您可以通过输入dpkg -l | grep ${pkg_name_to_check}
来检查它们是否安装。
你能指导我完成你的OpenCV安装过程吗?这意味着您的程序正在获取头文件,但没有获得opencv库。可能是您的opencv .so文件没有生成,或者它们不在系统路径中。检查构建文件夹是否正确生成了文件。如果OpenCV编译正确,导出构建位置的路径,然后尝试编译。您可以通过回显pkg-config --cflags opencv
和pkg-config --libs opencv
来检查系统是否能够找到opencv的安装位置。如果其中任何一个不打印适当的值,您可能必须导出位置。如果您错过了任何安装步骤,请检查此处。
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