opencv3.0.0-rc1： https://sourceforge.net/projects/opencvlibrary/files/opencv-unix/

安装：

sudo apt-get install cmake cmake-qt-gui  cmake-curses-gui

源码我放置在自己目录的/opencv/opev3.0.0-src 下
期望的构建目录在/opencv/opencv3-build 下
期望的安装目录是/opt/arm/opencv/opencv3-arm

cmake配置生成makefile

选择源代码目录/opencv/opev3.0.0-src
选择Build目录/opencv/opencv3-build，大家根据自己设置配置编译目录

点击Configure或者Generator
选择Unix Makefiles，
接着选择Specify options for cross-compiling，

Operating System填写arm-inux
C Compilers填写您交叉编译器arm-linux-gcc命令的地址
C++ Compilers填写arm-linux-g++的地址

注意默认的安装路径为修改默认配置，默认安装目录为/usr/local
但是我们交叉编译的来说并不合适，这样会替换我们宿主机上原有的库，
所以我把CMAKE_INSTALL_PREFIX变量改为/opt/arm/opencv/opencv3-arm

最后点击Configure进行配置，然后点击Gennerate就会生成Makefile

make编译并且安装

sudo make
sudo make install

出现问题

我们刚才的配置其实肯定是有问题的，因为一堆依赖库没有配置链接参数，但是我们又不知道需要哪些库，所以我们只能等待出现问题进行解决。

pthread

报错

Linking CXX executable ../../bin/opencv_test_calib3d
../../lib/libopencv_core.so: undefined reference to `pthread_key_create'
../../lib/libopencv_core.so: undefined reference to `pthread_getspecific'
../../lib/libopencv_ts.so: undefined reference to `pthread_key_delete'
../../lib/libopencv_core.so: undefined reference to `pthread_once'
../../lib/libopencv_core.so: undefined reference to `clock_gettime'
../../lib/libopencv_core.so: undefined reference to `pthread_setspecific'

很明显是pthread的库，

解决

修改/opt/opencv3-build目录下的CMakeCache.txt
CMAKE_EXE_LINKER_FLAGS原来为空，加上-lpthread -lrt

dlfcn

问题

undefined reference to `dlerror'
undefined reference to `dlopen'

解决

CMAKE_EXE_LINKER_FLAGS继续加上-ldl

parallel_pthreads_set_threads_num

问题

undefined reference to `dlerror'
undefined reference to `dlopen'

Linking CXX executable ../../bin/opencv_perf_core
../../lib/libopencv_core.so: undefined reference to `parallel_pthreads_set_threads_num(int)'
../../lib/libopencv_core.so: undefined reference to `parallel_pthreads_get_threads_num()'
../../lib/libopencv_core.so: undefined reference to `parallel_for_pthreads(cv::Range const&, cv::ParallelLoopBody const&, double)'

解决

这个是编译工具链的问题，解决了快一天
后来重要找到了解决方案Fixed compilation of pthread-based parallel_for with gcc 4.4.3

修改modules/core/src/parallel.cpp，自132行开始添加7处删除5处（+表示要添加，-表示要删除）

 namespace cv
 {
     ParallelLoopBody::~ParallelLoopBody() {}
+#if defined HAVE_PTHREADS && HAVE_PTHREADS
+    void parallel_for_pthreads(const cv::Range& range, const cv::ParallelLoopBody& body, double nstripes);
+    size_t parallel_pthreads_get_threads_num();
+    void parallel_pthreads_set_threads_num(int num);
+#endif
 }

+
 namespace
 {
 #ifdef CV_PARALLEL_FRAMEWORK
 @@ -301,7 +307,7 @@ void cv::parallel_for_(const cv::Range& range, const cv::ParallelLoopBody& body,
         }

 #elif defined HAVE_PTHREADS
-        void parallel_for_pthreads(const Range& range, const ParallelLoopBody& body, double nstripes);
+
         parallel_for_pthreads(range, body, nstripes);

 #else
 @@ -361,8 +367,6 @@ int cv::getNumThreads(void)

 #elif defined HAVE_PTHREADS

-        size_t parallel_pthreads_get_threads_num();
-
         return parallel_pthreads_get_threads_num();

 #else
 @@ -424,8 +428,6 @@ void cv::setNumThreads( int threads )

 #elif defined HAVE_PTHREADS

-    void parallel_pthreads_set_threads_num(int num);
-
     parallel_pthreads_set_threads_num(threads);

 #endif

arm-linux下的opencv移植