编译OpenCV-2.1.0 for arm-linux-gcc4.3.2（库文件libcv.so.2.1.0编译成为了x86-64格式）

http://blog.csdn.net/noodies/article/details/5798434
编译OpenCV for arm-linux（库文件libcv.so.2.1.0编译成为了x86-64格式）
编译OpenCV-2.1.0 for arm-linux-gcc4.3.2（库文件libcv.so.2.1.0编译成为了x86-64格式）


标签： referencemakefile嵌入式tiffgeneratorlinker
2010-08-09 11:41 18154人阅读 评论(52) 收藏 举报
 分类： 嵌入式系统（5）   Linux（7）  
版权声明：本文为博主原创文章，未经博主允许不得转载。


OpenCV是Intel支持的开源计算机视觉库。它由一系列C函数和少量C++类构成，实现了图像处理和计算机视觉方面的很多通用算法。它不依赖于其它的外部库—尽管也可以使用某些外部库。


OpenCV使用BSD License，对非商业应用和商业应用都可以免费使用。


OpenCV的主要应用环境是Windows和Linux，对于嵌入式系统如arm-linux，很少有资料提到，因此将我在arm-linux编译过程记录下来和大家分享。


预备工作：


a. 安装交叉编译链
  我使用的是arm-linux-gcc 4.3.2，解压到目录/usr/local/arm/4.3.2，然后在环境变量PATH中增加/usr/local/arm/4.3.2/bin
rootroot@rootroot-virtual-machine:~/wyb$ tar zxvf arm-linux-gcc-4.3.2.tgz 
ootroot@rootroot-virtual-machine:~/wyb$ cd usr/local/
rootroot@rootroot-virtual-machine:~/wyb/usr/local$ sudo mv arm/ /usr/local/
[sudo] password for rootroot: 
rootroot@rootroot-virtual-machine:~/wyb/usr/local$ 




rootroot@rootroot-virtual-machine:~/wyb/usr/local$ cd /usr/local/
rootroot@rootroot-virtual-machine:/usr/local$ sudo chmod 777 arm/ -R


rootroot@rootroot-virtual-machine:~$ 
rootroot@rootroot-virtual-machine:~$ 
rootroot@rootroot-virtual-machine:~$ sudo apt-get update
[sudo] password for rootroot: 
rootroot@rootroot-virtual-machine:~$ sudo apt-get install lsb-core




http://www.cmake.org/files/v2.8/cmake-2.8.2-Linux-i386.tar.gz
http://www.cmake.org/files/v2.8/


b. 安装CMake
  OpenCV 2.0之后的版本，必须使用CMake创建Makefile。我使用的CMake版本是2.8.2，解压到目录/usr/local/cmake-2.8.2-Linux-i386，然后在环境变量PATH中增加/usr/local/cmake-2.8.2-Linux-i386/bin
rootroot@rootroot-virtual-machine:~/wyb$ tar zxvf cmake-2.8.2-Linux-i386.tar.gz 
rootroot@rootroot-virtual-machine:~/wyb$ sudo mv cmake-2.8.2-Linux-i386 /usr/local/
rootroot@rootroot-virtual-machine:~/wyb$ sudo chmod 777 /usr/local/cmake-2.8.2-Linux-i386/ -R


rootroot@rootroot-virtual-machine:~$ cp .bashrc bak1.bashrc
rootroot@rootroot-virtual-machine:~$ diff .bashrc bak1.bashrc 
115,118d114
< 
< 
< export PATH=$PATH:/usr/local/cmake-2.8.2-Linux-i386/bin
< 
rootroot@rootroot-virtual-machine:~$ 




编译OpenCV：
rootroot@cm-System-Product-Name:/home/wwt$ wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2/download
--2016-11-24 14:22:05--  http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2/download
正在解析主机 sourceforge.net (sourceforge.net)... 216.34.181.60
正在连接 sourceforge.net (sourceforge.net)|216.34.181.60|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 301 Moved Permanently
位置：https://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2/download [跟随至新的 URL]
--2016-11-24 14:22:07--  https://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2/download
正在连接 sourceforge.net (sourceforge.net)|216.34.181.60|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Found
位置：http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2?r=&ts=1479968535&use_mirror=nchc [跟随至新的 URL]
--2016-11-24 14:22:15--  http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2?r=&ts=1479968535&use_mirror=nchc
正在解析主机 downloads.sourceforge.net (downloads.sourceforge.net)... 216.34.181.59
正在连接 downloads.sourceforge.net (downloads.sourceforge.net)|216.34.181.59|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Found
位置：http://nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2 [跟随至新的 URL]
--2016-11-24 14:22:16--  http://nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2
正在解析主机 nchc.dl.sourceforge.net (nchc.dl.sourceforge.net)... 211.79.60.17, 2001:e10:ffff:1f02::17
正在连接 nchc.dl.sourceforge.net (nchc.dl.sourceforge.net)|211.79.60.17|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Found
位置：http://101.110.118.69/nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2 [跟随至新的 URL]
--2016-11-24 14:22:18--  http://101.110.118.69/nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2
正在连接 101.110.118.69:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度： 14459566 (14M) [application/octet-stream]
正在保存至: “download”


1、解压OpenCV 2.1到/usr/local/OpenCV-2.1.0目录下
rootroot@rootroot-virtual-machine:~/wyb$ tar jxvf OpenCV-2.1.0.tar.bz2 
rootroot@rootroot-virtual-machine:~/wyb$ sudo mv OpenCV-2.1.0 /usr/local/
 


2、创建/usr/local/opencv-arm/目录，作为CMake编译arm版本的工作目录
rootroot@rootroot-virtual-machine:~/wyb$ sudo mkdir -p /usr/local/opencv-arm/
 


rootroot@rootroot-virtual-machine:~$ cd wyb/cmake-2.8.2-Linux-i386/bin/
rootroot@rootroot-virtual-machine:~/wyb/cmake-2.8.2-Linux-i386/bin$ ll
total 35408
drwxrwxr-x 2 rootroot rootroot     4096  1月 12 16:43 ./
drwxrwxr-x 6 rootroot rootroot     4096  1月 12 16:43 ../
-rwxr-xr-x 1 rootroot rootroot  4769652  6月 28  2010 ccmake*
-rwxr-xr-x 1 rootroot rootroot  4596128  6月 28  2010 cmake*
-rwxr-xr-x 1 rootroot rootroot 16134364  6月 28  2010 cmake-gui*
-rwxr-xr-x 1 rootroot rootroot  4839828  6月 28  2010 cpack*
-rwxr-xr-x 1 rootroot rootroot  5896652  6月 28  2010 ctest*
rootroot@rootroot-virtual-machine:~/wyb/cmake-2.8.2-Linux-i386/bin$ ./cmake-gui 
./cmake-gui: error while loading shared libraries: libSM.so.6: cannot open shared object file: No such file or directory
rootroot@rootroot-virtual-machine:~/wyb/cmake-2.8.2-Linux-i386/bin$ 




3、在X环境下，运行cmake-gui
   选择源代码目录:/usr/local/OpenCV-2.1.0
   选择Build目录：/usr/local/opencv-arm/
   点击Configure，保持generator为Unix Makefiles，选择Specify options for cross-compiling，点击Next
   Operating System填写arm-inux
   C Compilers填写/usr/local/arm/4.3.2/bin/arm-linux-gcc
   C++ Compilers填写/usr/local/arm/4.3.2/bin/arm-linux-g++
   程序库的Target Root填写/usr/local/arm/4.3.2/，然后点击Finish


   修改默认配置，默认安装目录为/usr/local，对于交叉编译的库来说并不合适，所以我把CMAKE_INSTALL_PREFIX变量改为/usr/local/arm/lib/opencv/
   另外，我没有安装tiff图像的支持，因此去掉WITH_TIFF


   点击Generate生成Makefile


/home/rootroot/wyb/OpenCV-2.1.0/
/usr/local/opencv-arm/


arm-linux
/usr/local/arm/4.3.2/bin/arm-linux-gcc
/usr/local/arm/4.3.2/bin/arm-linux-g++
/usr/local/arm/4.3.2/


rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ make




[ 44%] Building CXX object src/cxcore/CMakeFiles/cxcore.dir/cxalloc.o
In file included from /usr/local/OpenCV-2.1.0/include/opencv/cxcore.h:1826:0,
                 from /usr/local/OpenCV-2.1.0/src/cxcore/_cxcore.h:51,
                 from /usr/local/OpenCV-2.1.0/src/cxcore/cxalloc.cpp:43:
/usr/local/OpenCV-2.1.0/include/opencv/cxcore.hpp:177:13: error: ‘ptrdiff_t’ does not name a type
     typedef ptrdiff_t difference_type;
             ^
In file included from /usr/local/OpenCV-2.1.0/include/opencv/cxcore.hpp:2307:0,
                 from /usr/local/OpenCV-2.1.0/include/opencv/cxcore.h:1826,
                 from /usr/local/OpenCV-2.1.0/src/cxcore/_cxcore.h:51,




http://blog.csdn.net/tfygg/article/details/37910025
opencv在linux下的安装
之后就是make ; make install 当然这中间也遇到一些问题。具体如下：
（1）../include/opencv/cxcore.hpp:169:13: error: 'ptrdiff_t' does not name a type
../include/opencv/cxoperations.hpp:1916:15: error: 'ptrdiff_t' does not name a type
../include/opencv/cxoperations.hpp:2465:31: error: 'ptrdiff_t' does not name a type
../include/opencv/cxmat.hpp:356:15: error: expected ';' before 'delta1'
../include/opencv/cxmat.hpp:358:9: error: 'delta1' was not declared in this scope
../include/opencv/cxmat.hpp:367:31: error: 'delta2' was not declared in this scope
上面这个问题只需要在OpenCV2.0.0/include/opencv/cxcore.hpp文件中加入： 
using std::vector;
using std::string;
+using std::ptrdiff_t;


template<typename _Tp> class CV_EXPORTS Size_;
template<typename _Tp> class CV_EXPORTS Point_;


加了这一句话就好了






[ 72%] Building CXX object src/highgui/CMakeFiles/highgui.dir/cvcap.o
[ 72%] Building CXX object src/highgui/CMakeFiles/highgui.dir/cvcap_images.o
[ 72%] Building CXX object src/highgui/CMakeFiles/highgui.dir/image.o
[ 72%] Building CXX object src/highgui/CMakeFiles/highgui.dir/loadsave.o
/usr/local/OpenCV-2.1.0/src/highgui/loadsave.cpp: In function ‘void* cv::imdecode_(const cv::Mat&, int, int, cv::Mat*)’:
/usr/local/OpenCV-2.1.0/src/highgui/loadsave.cpp:333:28: error: ‘unlink’ was not declared in this scope
             unlink(filename);


http://www.mamicode.com/info-detail-23747.html
ZOJ3672：Gao The Sequence
安装opencv2.0


error: highgui/loadsave.cpp:333:28: error: ‘unlink’ was not declared in this scope   解决方法:
vi src/highgui/loadsave.cpp
加入： 
#include<unistd.h> 








Linking CXX static library ../../lib/libcvhaartraining.a
[ 86%] Built target cvhaartraining
Scanning dependencies of target createsamples
[ 86%] Building CXX object apps/haartraining/CMakeFiles/createsamples.dir/createsamples.o
Linking CXX executable ../../bin/opencv_createsamples
../../lib/libhighgui.so.2.1.0: undefined reference to `cvCreateCameraCapture_V4L(int)'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/opencv_createsamples] Error 1
make[1]: *** [apps/haartraining/CMakeFiles/createsamples.dir/all] Error 2
make: *** [all] Error 2
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ 




rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ cd /usr/local/OpenCV-2.1.0/src/highgui/
rootroot@rootroot-virtual-machine:/usr/local/OpenCV-2.1.0/src/highgui$ sudo cp cvcap_v4l.cpp cvcap_v4l.cpp.bak
[sudo] password for rootroot: 
rootroot@rootroot-virtual-machine:/usr/local/OpenCV-2.1.0/src/highgui$ sudo cp cvcap.cpp cvcap.cpp.bak
rootroot@rootroot-virtual-machine:/usr/local/OpenCV-2.1.0/src/highgui$ 




http://blog.csdn.net/dayeshisir/article/details/6625400
fedora 15 安装opencv2.2时出现undefined reference to `cvCreateCameraCapture_V4L(int)'问题及其解决方法








/usr/local/OpenCV-2.1.0/tests/cv/src/anearestneighbors.cpp:513:22: error: ‘unlink’ was not declared in this scope
     unlink( filename );
                      ^
/usr/local/OpenCV-2.1.0/tests/cv/src/anearestneighbors.cpp:509:23: warning: ignoring return value of ‘char* tmpnam(char*)’, declared with attribute warn_unused_result [-Wunused-result]
     tmpnam( filename );
                       ^
make[2]: *** [tests/cv/CMakeFiles/cvtest.dir/src/anearestneighbors.o] Error 1
make[1]: *** [tests/cv/CMakeFiles/cvtest.dir/all] Error 2
make: *** [all] Error 2
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ 








/usr/local/OpenCV-2.1.0/tests/cxcore/src/aio.cpp:429:28: error: ‘unlink’ was not declared in this scope
             unlink(filename);
                            ^
make[2]: *** [tests/cxcore/CMakeFiles/cxcoretest.dir/src/aio.o] Error 1
make[1]: *** [tests/cxcore/CMakeFiles/cxcoretest.dir/all] Error 2
make: *** [all] Error 2
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ cd /usr/local/OpenCV-2.1.0/tests/cxcore/src/








[ 99%] Building CXX object tests/ml/CMakeFiles/mltest.dir/src/slmltests.o
/usr/local/OpenCV-2.1.0/tests/ml/src/slmltests.cpp: In member function ‘virtual int CV_SLMLTest::validate_test_results(int)’:
/usr/local/OpenCV-2.1.0/tests/ml/src/slmltests.cpp:104:20: error: ‘unlink’ was not declared in this scope
     unlink( fname1 );
                    ^
make[2]: *** [tests/ml/CMakeFiles/mltest.dir/src/slmltests.o] Error 1
make[1]: *** [tests/ml/CMakeFiles/mltest.dir/all] Error 2
make: *** [all] Error 2








[ 99%] Building CXX object tests/ml/CMakeFiles/mltest.dir/src/slmltests.o
/usr/local/OpenCV-2.1.0/tests/ml/src/slmltests.cpp: In member function ‘virtual int CV_SLMLTest::validate_test_results(int)’:
/usr/local/OpenCV-2.1.0/tests/ml/src/slmltests.cpp:104:20: error: ‘unlink’ was not declared in this scope
     unlink( fname1 );
                    ^
make[2]: *** [tests/ml/CMakeFiles/mltest.dir/src/slmltests.o] Error 1
make[1]: *** [tests/ml/CMakeFiles/mltest.dir/all] Error 2
make: *** [all] Error 2
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ cd /usr/local/OpenCV-2.1.0/tests/ml/src/








[100%] Building CXX object tests/ml/CMakeFiles/mltest.dir/src/amltests.o
Linking CXX executable ../../bin/mltest
CMakeFiles/mltest.dir/src/slmltests.o: In function `CV_SLMLTest::run_test_case(int)':
slmltests.cpp:(.text._ZN11CV_SLMLTest13run_test_caseEi+0x92): warning: the use of `tmpnam' is dangerous, better use `mkstemp'
[100%] Built target mltest
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ 
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ 
rootroot@rootroot-virtual-machine:/usr/local/opencv-arm$ 




4、在终端界面中，进入目录/usr/local/opencv-arm，运行make编译opencv




编译时发现如下错误：
Linking CXX executable ../../bin/opencv_createsamples
../../lib/libcxcore.so: undefined reference to `clock_gettime'
../../lib/libcxcore.so: undefined reference to `pthread_key_create'
../../lib/libcxcore.so: undefined reference to `pthread_getspecific'
../../lib/libcxcore.so: undefined reference to `pthread_setspecific'


原因是cmake不认识我定义的arm-linux系统标记，没有加上库pthread和rt的链接选项




没有碰到这里
5、修改CMakeCache.txt，CMAKE_EXE_LINKER_FLAGS原来为空，加上-lpthread -lrt，重新编译，错误消除




6、运行make install，将opencv生成的库和头文件安装到目录/usr/local/arm/lib/opencv/




测试OpenCV库




1、首先确认一下库是否已编译正确及其安装位置


 


查看头文件：


 
[c-sharp] view plain copy
[root@localhost opencv-arm]# ls /usr/local/arm/lib/opencv/include/opencv/  
cvaux.h    cvcompat.h  cv.hpp        cvtypes.h  cvvidsurv.hpp  cxcore.h    cxerror.h  cxmat.hpp  cxoperations.hpp  highgui.h    ml.h  
cvaux.hpp  cv.h        cvinternal.h  cvver.h    cvwimage.h     cxcore.hpp  cxflann.h  cxmisc.h   cxtypes.h         highgui.hpp  
 


rootroot@rootroot-virtual-machine:/usr/local$ cd /usr/local/arm/lib/opencv/include/opencv/
rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/include/opencv$ ll
total 1000
drwxrwxr-x 2 rootroot rootroot   4096  1月 12 18:23 ./
drwxrwxr-x 3 rootroot rootroot   4096  1月 12 18:23 ../
-rw-r--r-- 1 rootroot rootroot  66326  4月  6  2010 cvaux.h
-rw-r--r-- 1 rootroot rootroot  68287  4月  6  2010 cvaux.hpp
-rw-r--r-- 1 rootroot rootroot  40693  4月  6  2010 cvcompat.h
-rw-r--r-- 1 rootroot rootroot  72383  4月  6  2010 cv.h
-rw-r--r-- 1 rootroot rootroot  46827  4月  6  2010 cv.hpp
-rw-r--r-- 1 rootroot rootroot   6164  4月  6  2010 cvinternal.h
-rw-r--r-- 1 rootroot rootroot  11734  4月  6  2010 cvtypes.h
-rw-r--r-- 1 rootroot rootroot   2534  4月  6  2010 cvver.h
-rw-r--r-- 1 rootroot rootroot  42000  4月  6  2010 cvvidsurv.hpp
-rw-r--r-- 1 rootroot rootroot  20724  4月  6  2010 cvwimage.h
-rw-r--r-- 1 rootroot rootroot  77824  4月  6  2010 cxcore.h
-rw-r--r-- 1 rootroot rootroot  83148  1月 12 17:38 cxcore.hpp
-rw-r--r-- 1 rootroot rootroot   8750  4月  6  2010 cxerror.h
-rw-r--r-- 1 rootroot rootroot   6936  4月  6  2010 cxflann.h
-rw-r--r-- 1 rootroot rootroot 153155  4月  6  2010 cxmat.hpp
-rw-r--r-- 1 rootroot rootroot  27971  4月  6  2010 cxmisc.h
-rw-r--r-- 1 rootroot rootroot  90263  4月  6  2010 cxoperations.hpp
-rw-r--r-- 1 rootroot rootroot  53078  4月  6  2010 cxtypes.h
-rw-r--r-- 1 rootroot rootroot  18598  4月  6  2010 highgui.h
-rw-r--r-- 1 rootroot rootroot   4823  4月  6  2010 highgui.hpp
-rw-r--r-- 1 rootroot rootroot  72789  4月  6  2010 ml.h
rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/include/opencv$ 




查看库文件：


[c-sharp] view plain copy
[root@localhost opencv-arm]# ls /usr/local/arm/lib/opencv/lib  
libcv.a  libcvaux.a  libcvaux.so  libcv.so  libcxcore.a  libcxcore.so  libhighgui.a  libhighgui.so  libml.a  libml.so  
 


rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/lib$ ll
total 8776
drwxrwxr-x 3 rootroot rootroot    4096  1月 12 18:23 ./
drwxrwxrwx 6 rootroot rootroot    4096  1月 12 18:23 ../
lrwxrwxrwx 1 rootroot rootroot      15  1月 12 18:23 libcvaux.so -> libcvaux.so.2.1
lrwxrwxrwx 1 rootroot rootroot      17  1月 12 18:23 libcvaux.so.2.1 -> libcvaux.so.2.1.0
-rw-r--r-- 1 rootroot rootroot 1351098  1月 12 18:23 libcvaux.so.2.1.0
lrwxrwxrwx 1 rootroot rootroot      12  1月 12 18:23 libcv.so -> libcv.so.2.1
lrwxrwxrwx 1 rootroot rootroot      14  1月 12 18:23 libcv.so.2.1 -> libcv.so.2.1.0
-rw-r--r-- 1 rootroot rootroot 2821335  1月 12 18:23 libcv.so.2.1.0
lrwxrwxrwx 1 rootroot rootroot      16  1月 12 18:23 libcxcore.so -> libcxcore.so.2.1
lrwxrwxrwx 1 rootroot rootroot      18  1月 12 18:23 libcxcore.so.2.1 -> libcxcore.so.2.1.0
-rw-r--r-- 1 rootroot rootroot 3357666  1月 12 18:23 libcxcore.so.2.1.0
lrwxrwxrwx 1 rootroot rootroot      17  1月 12 18:23 libhighgui.so -> libhighgui.so.2.1
lrwxrwxrwx 1 rootroot rootroot      19  1月 12 18:23 libhighgui.so.2.1 -> libhighgui.so.2.1.0
-rw-r--r-- 1 rootroot rootroot  943890  1月 12 18:23 libhighgui.so.2.1.0
lrwxrwxrwx 1 rootroot rootroot      12  1月 12 18:23 libml.so -> libml.so.2.1
lrwxrwxrwx 1 rootroot rootroot      14  1月 12 18:23 libml.so.2.1 -> libml.so.2.1.0
-rw-r--r-- 1 rootroot rootroot  491953  1月 12 18:23 libml.so.2.1.0
drwxrwxr-x 2 rootroot rootroot    4096  1月 12 18:23 pkgconfig/
rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/lib$ 




2、写个简单的测试程序，打开摄像头并创建一个窗口显示


 
// test.cpp
  
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>




int main()
{
CvCapture* capture = NULL;
IplImage* frame = NULL;


if( !(capture = cvCaptureFromCAM(-1)))
{
fprintf(stderr, "Can not open camera./n");

return -1;
}


cvNamedWindow("video", 1);


while(frame = cvQueryFrame( capture ) )
{
cvShowImage("video", frame);
}


cvDestroyWindow("video");
cvReleaseCapture(&capture);

return 0;
}




3、编译链接测试程序


arm-linux-g++ -I/usr/local/arm/lib/opencv/include/opencv/ -L/usr/local/arm/lib/opencv/lib/ -lcv -lcxcore -lhighgui -lpthread -lrt -o test test.cpp




rootroot@rootroot-virtual-machine:~/wyb$ arm-linux-g++ -I/usr/local/arm/lib/opencv/include/opencv/ -L/usr/local/arm/lib/opencv/lib -lcv -lcxcore -lhighgui -lpthread -lrt -o test test.cpp
/usr/local/arm/lib/opencv/lib/libcv.so: file not recognized: File format not recognized
collect2: ld returned 1 exit status
rootroot@rootroot-virtual-machine:~/wyb$ 




rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/lib$ file libcv.so.2.1.0
libcv.so.2.1.0: ELF 64-bit LSB  shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=7f04c77df448080762e47b6f746e5db2e340251d, not stripped
rootroot@rootroot-virtual-machine:/usr/local/arm/lib/opencv/lib$ 




http://stackoverflow.com/questions/14404445/g-throwing-file-not-recognized-file-format-not-recognized-error
g++ throwing file not recognized: File format not recognized error
getting following error with the command g++ -o test -L . -l pq
libpq.so: file not recognized: File format not recognized


#file libpq.so
libpq.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), not stripped




4、复制程序到嵌入式系统中运行

首先复制主机/usr/local/arm/lib/opencv/lib/下面的几个.so文件到嵌入式Linux系统的/lib/目录下，再复制我们编译的test到嵌入式系统/opt/myworks/目录下（并确保文件test属性为可执行），如果test可正常运行没有报告缺少库文件，说明我们编译的arm-linux版OpenCV库已经可以正常使用。