我在Windows 7 64位和Netbeans 7.0中使用OpenCV。我试图使用MinGW和cygwin编译下一个代码，但都失败了未定义的引用。
当我使用MAT或FLANN和其他人时，我无法编译，但我正在添加所有库(我尝试只添加调试库，发布库，只需要的库……但失败)。
同样的代码在ubuntu中工作，但我也需要在windows中编译它。我使用的是2.3编译版本(使用CMake)和可安装的版本。
#include "opencv2opencv.hpp"
#include <iostream>
using namespace std;
int main(void)
{
cv::Mat::eye(1, 1, 0);
return 0;
}
"/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .clean-conf
make[1]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
rm -f -r build/Release
rm -f dist/Release/Cygwin-Windows/opencv23sandbox.exe
make[1]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
CLEAN SUCCESSFUL (total time: 1s)
"/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
"/usr/bin/make" -f nbproject/Makefile-Release.mk dist/Release/Cygwin-Windows/opencv23sandbox.exe
make[2]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
mkdir -p build/Release/Cygwin-Windows
rm -f build/Release/Cygwin-Windows/main.o.d
g++.exe -c -O2 -I/cygdrive/C/OpenCV2.3/build/include -MMD -MP -MF build/Release/Cygwin-Windows/main.o.d -o build/Release/Cygwin-Windows/main.o main.cpp
mkdir -p dist/Release/Cygwin-Windows
g++.exe -o dist/Release/Cygwin-Windows/opencv23sandbox build/Release/Cygwin-Windows/main.o -L/cygdrive/C/OpenCV2.3/build/x86/vc10/lib -lopencv_calib3d230 -lopencv_calib3d230d -lopencv_contrib230 -lopencv_contrib230d -lopencv_core230 -lopencv_core230d -lopencv_features2d230 -lopencv_features2d230d -lopencv_flann230 -lopencv_flann230d -lopencv_gpu230 -lopencv_gpu230d -lopencv_haartraining_engine -lopencv_haartraining_engined -lopencv_highgui230 -lopencv_highgui230d -lopencv_imgproc230 -lopencv_imgproc230d -lopencv_legacy230 -lopencv_legacy230d -lopencv_ml230 -lopencv_ml230d -lopencv_objdetect230 -lopencv_objdetect230d -lopencv_video230 -lopencv_video230d
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0xac): undefined reference to `cv::Mat::eye(int, int, int)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x106): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x16f): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x1dd): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x1fa): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x20a): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x21a): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x66): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x5e): undefined reference to `cv::fastFree(void*)'
collect2: ld returned 1make[2]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
make[1]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
exit status
make[2]: *** [dist/Release/Cygwin-Windows/opencv23sandbox.exe] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 2s)
尝试使用MinGW库:
"/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .clean-conf
make[1]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
rm -f -r build/Release
rm -f dist/Release/MinGW-Windows/opencv23sandbox.exe
make[1]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
CLEAN SUCCESSFUL (total time: 350ms)
"/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
"/bin/make" -f nbproject/Makefile-Release.mk dist/Release/MinGW-Windows/opencv23sandbox.exe
make[2]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
mkdir -p build/Release/MinGW-Windows
rm -f build/Release/MinGW-Windows/main.o.d
g++.exe -c -O2 -I/C/OpenCV2.3/build/include -MMD -MP -MF build/Release/MinGW-Windows/main.o.d -o build/Release/MinGW-Windows/main.o main.cpp
mkdir -p dist/Release/MinGW-Windows
g++.exe -o dist/Release/MinGW-Windows/opencv23sandbox build/Release/MinGW-Windows/main.o -L../OpenCV/OpenCV2.3/build/x86/mingw/lib ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_calib3d230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_contrib230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_core230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_features2d230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_flann230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_gpu230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_highgui230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_imgproc230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_legacy230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_ml230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_objdetect230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_video230.dll.a
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x4f): undefined reference to `cv::Mat::eye(int, int, int)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0xac): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x11a): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x191): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1a7): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1ba): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1ce): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x74): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x63): undefined reference to `cv::fastFree(void*)'
collect2: ld returned 1 exit status
make[2]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
make[1]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
make[2]: *** [dist/Release/MinGW-Windows/opencv23sandbox.exe] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 1s)
或
g++.exe -o dist/Release/MinGW-Windows/opencv23sandbox build/Release/MinGW-Windows/main.o -L../OpenCV/OpenCV2.3/build/x86/mingw/lib -lopencv_calib3d230.dll -lopencv_contrib230.dll -lopencv_core230.dll -lopencv_features2d230.dll -lopencv_flann230.dll -lopencv_gpu230.dll -lopencv_highgui230.dll -lopencv_imgproc230.dll -lopencv_legacy230.dll -lopencv_ml230.dll -lopencv_objdetect230.dll -lopencv_video230.dll
相同的结果。
您正在使用预编译的MinGW库吗?(看起来是这样)。我试了几天让我的项目在Code::Blocks下成功链接。我看到了你所描述的那种错误(糟糕的参考资料等)。
我最终使用这里显示的步骤重新编译了OpenCV，并且一切都变得很好。
我猜问题是库路径指向vc10目录(-L/cygdrive/C/OpenCV2.3/build/x86/vc10/lib)而不是mingw目录(-L/cygdrive/C/OpenCV2.3/build/x86/mingw/lib)。ld-linker找不到这些方法，因为它们被vc++ "link.exe"打乱了。
如果你使用64位，那么你也有64位库链接:-L/cygdrive/C/OpenCV2.3/build/x64/mingw/lib .
我也有同样的问题。我试图用MinGW在64位Windows 7机器下编译我的程序。以下是可能导致这个问题的几种可能性:
1)您需要确保OpenCV2.3/build/x64/mingw/lib是链接的。注意，不要将项目链接到visual studio的库或x86的库。
2)确保正确的dll被复制到项目目录，或者已经添加到PATH。例如，如果您使用libopencv_core243.dll.a这个库，您应该确保libopencv_core243.dll可以被项目加载。这不是问题的原因。但我认为了解这一点也很重要。
3)确保MinGW可以编译x64程序。这就是我使用的:mingw-w64(但由于mingw-w64项目正在转移到mingw-w64.org，最好使用新的网站)。不幸的是，从MinGW32下载的那个不起作用。MinGW官网的链接会带你到第二个网站(MinGW32)。
4)默认情况下，MinGw可以将您的项目编译为32位程序。为了确保它可以编译64位，添加这个编译标志-m64。否则，如果只将项目与所有64位库链接起来，也会导致问题。