移植opencv到龙芯1c上

参考了：/article/4731713.html

开发环境：RHEL5

运行环境：开源龙芯1c开发板（智龙首发版）

交叉编译器：gcc-4.3

opencv：2.4.9

cmake：2.8.10.2

移植好的opencv库

http://git.oschina.net/caogos/OpenLoongsonPickUpTennisRobot/tree/master/opencv%E5%BA%93%EF%BC%88%E4%BD%BF%E7%94%A8%E4%BA%A4%E5%8F%89%E7%BC%96%E8%AF%91%E5%99%A8gcc4.3%E7%BC%96%E8%AF%91%E7%9A%84%EF%BC%89

详细移植步骤

按照cmake：可以用命令“apt-get install cmake”或者到cmake官方下载编好的cmake，解压后直接运行

下载opencv源码，并解压

在命令行执行"cmake-gui"，打开cmake的界面，选择源码所在目录，build目录需要新建一个，另外还有一个install目录，如下



把文档也编译出来



生成动态库



选上需要的opencv模块







需要qt的可以把qt也勾上，我这里没选



点击”Configure“按钮，选择交叉编译，然后点finish，如果有错，根据提示修改。再点击”Generate“

完成后，进入build目录（前面设置的），执行”make“编译。

如果提示错误，按照以下修改
修改文件CMakeCache.txt
CMAKE_C_FLAGS:STRING=-fPIC
CMAKE_EXE_LINKER_FLAGS=-lpthread -lrt -ldl
再make，make install，编好的库就在（前面设置的）install目录下

应用opencv库

编译测试程序

mipsel-linux-g++ main.cpp -o opencv_test -I/home/develop/opencv/opencv-2.4.9-ls1x-lib/include -L/home/develop/opencv/opencv-2.4.9-ls1x-lib/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lpthread -lrt

拷贝库文件

使用命令“mipsel-linux-readelf -d opencv_test”查看使用了那些库文件，然后将其拷贝到开发板上

[root@localhost opencv]# mipsel-linux-readelf -d opencv_test

Dynamic section at offset 0x19c contains 33 entries:

Tag Type Name/Value

0x00000001 (NEEDED) Shared library: [libopencv_core.so]

0x00000001 (NEEDED) Shared library: [libopencv_imgproc.so]

0x00000001 (NEEDED) Shared library: [libopencv_highgui.so]

0x00000001 (NEEDED) Shared library: [libpthread.so.0]

0x00000001 (NEEDED) Shared library: [librt.so.1]

0x00000001 (NEEDED) Shared library: [libstdc++.so.6]

0x00000001 (NEEDED) Shared library: [libm.so.6]

0x00000001 (NEEDED) Shared library: [libgcc_s.so.1]

0x00000001 (NEEDED) Shared library: [libc.so.6]

运行程序

[LOONSON@Loongson-gz:/test/opencv]#./opencv_test