OpenCV在Blackfin-uClinux下的移植&问题~

whiteast

宿主机：Red Hat 9 - Vmware 6
目标板：HH-Blackfin531 - uClinux 2.6.16 for Blackfin
ToolsChain：gcc-bfin-3.4.tgz
OpenCV：OpenCV-1.0.0.tar.gz

解压后，进入opencv目录：

1. [root@white opencv]# ./configure --host=bfin-uclinux --without-gtk --without-carbon --without-quicktime --without-1394libs --without-ffmpeg --without-python --without-swig --enable-static --disable-shared --disable-apps CC=bfin-uclinux-gcc-3.4.5 CXX=bfin-uclinux-g++-3.4.5 CPPFLAGS=-I/usr/include

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一切正常，然后make，出现错误：

1. /usr/include/bits/mathinline.h: In function `void icvThickLine(CvMat*, CvPoint, CvPoint, const void*, int, int, int, int)':
2. /usr/include/bits/mathinline.h:441: error: impossible constraint in `asm'
3. /usr/include/bits/mathinline.h:441: warning: '__result' might be used uninitialized in this function
4. make[3]: *** [cxdrawing.lo] Error 1
5. make[3]: Leaving directory `/home/opencv/cxcore/src'
6. make[2]: *** [all-recursive] Error 1
7. make[2]: Leaving directory `/home/opencv/cxcore'
8. make[1]: *** [all-recursive] Error 1
9. make[1]: Leaving directory `/home/opencv'
10. make: *** [all] Error 2

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之后换了opencv-0.9.9.tar.gz，不行，configure加入--without-v4l，一样的错误，请教~！
看了好久，好像OpenCV在uClinux和WinCE下都没有完整成功移植的案例，实在是个头疼的问题，进度就卡在这里了...

发现个问题，有文章使用bfin-uclinux作为host，有的则是分别用host和target

bingpo

错误提示很清楚，估计是使用了非本架构支持的asm指令，出错那行肯定是embedded asm，而且里边可能用到了非目标平台支持的汇编指令或是寄存器。
出现这种错误，原因肯定是config.h中的某些宏定义不对，造成make时去编译了其他平台的文件，进而是configure参数不对。从你贴的东西来看，--host=bfin-uclinux似乎是有问题的，是否应该是--target=bfin-uclinux或直接用--cross-compiler之类的，具体你可以自己看configure文件中的内容就可以了。

whiteast

使用opencv-0.9.9.tar.gz，解压后进入opencv目录，使用选项命令

1. ./configure --build=i686-pc-linux-gnu --host=bfin-uclinux

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通过，然后make

1. In file included from /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/limits.h:26,
2.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/limits.h:122,
3.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/syslimits.h:7,
4.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/limits.h:11,
5.                  from /usr/include/python2.2/Python.h:27,
6.                  from _cv.cpp:129:
7. /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/features.h:329:2: #error It appears you have defined _FILE_OFFSET_BITS=64. Unfortunately, uClibc was built without large file support enabled.
8. In file included from /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/stdio.h:72,
9.                  from /usr/include/python2.2/Python.h:42,
10.                  from _cv.cpp:129:
11. /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/bits/uClibc_stdio.h:72:2: #error Sorry... uClibc was built without large file support!
12. In file included from /usr/include/python2.2/Python.h:42,
13.                  from _cv.cpp:129:
14. /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/stdio.h:83: error: `__STDIO_fpos64_t\' does not name a type
15. In file included from /usr/include/python2.2/Python.h:42,
16.                  from _cv.cpp:129:
17. /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/stdio.h:701: error: `fpos_t\' has not been declared
18. /usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/usr/include/stdio.h:703: error: expected `,\' or `...\' before \'*\' token
19. In file included from /usr/include/python2.2/Python.h:71,
20.                  from _cv.cpp:129:
21. /usr/include/python2.2/unicodeobject.h:118:21: wchar.h: No such file or directory
22. In file included from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/bfin-uclinux/bits/c++locale.h:43,
23.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/iosfwd:46,
24.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/bits/stl_algobase.h:70,
25.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/bits/char_traits.h:46,
26.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/string:47,
27.                  from /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/stdexcept:45,
28.                  from _cv.cpp:2694:
29. /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/include/c++/cstdio:100: error: `::fpos_t\' has not been declared
30. _cv.cpp:2473: warning: \'long int PyInt_AS_LONG(PyObject*)\' defined but not used
31. _cv.cpp:2483: warning: \'double PyFloat_AS_DOUBLE(PyObject*)\' defined but not used
32. make[4]: *** [_cv_la-_cv.lo] Error 1
33. make[4]: Leaving directory `/home/opencv/interfaces/swig/python\'
34. make[3]: *** [all-recursive] Error 1
35. make[3]: Leaving directory `/home/opencv/interfaces/swig\'
36. make[2]: *** [all-recursive] Error 1
37. make[2]: Leaving directory `/home/opencv/interfaces\'
38. make[1]: *** [all-recursive] Error 1
39. make[1]: Leaving directory `/home/opencv\'
40. make: *** [all] Error 2

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编译不通过，问题处在swig中
然后添加命令，去掉swig和python支持

1. ./configure --build=i686-pc-linux-gnu --host=bfin-uclinux --without-swig --without-python

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通过，然后make，没有报错，编译成功
然后make install，没有报错，成功
为保证结果稳定，还有一些选项如gtk等也可以取消掉

whiteast

之后进行验证，想直接使用make check

1. bfin-uclinux-g++ -Wall -fno-rtti -pipe -O3 -fomit-frame-pointer -o cxcoretest aarithm.o adatastruct.o adxt.o amath.o cxcoretest_main.o  ../../../tests/cxts/.libs/libcxts.a /home/opencv/cxcore/src/.libs/libcxcore.a -L/home/mhfan/devel/hhbf/toolchain/build/gcc_build-3.4/bfin-uclinux/libstdc++-v3/src -L/home/mhfan/devel/hhbf/toolchain/build/gcc_build-3.4/bfin-uclinux/libstdc++-v3/src/.libs -L/home/mhfan/devel/hhbf/toolchain/build/gcc_build-3.4/gcc -L/usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/bin -L/usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/lib -L/usr/local/gcc-bfin-3.4-uclinux/lib/../bfin-uclinux/lib -L/usr/local/gcc-bfin-3.4-uclinux/bfin-uclinux/runtime/lib -lc -lgcc ../../../cxcore/src/.libs/libcxcore.a /usr/local/gcc-bfin-3.4-uclinux/lib/gcc/bfin-uclinux/3.4.5/libstdc++.a -lpthread -lm/home/opencv/cxcore/src/.libs/libcxcore.a(cxswitcher.o)(.text+0x368): In function `icvUpdatePluginFuncTab(CvPluginFuncInfo*)\':
2. cxswitcher.cpp: undefined reference to `_dlsym\'
3. /home/opencv/cxcore/src/.libs/libcxcore.a(cxswitcher.o)(.text+0x55a): In function `_cvUseOptimized\':
4. cxswitcher.cpp: undefined reference to `_dlopen\'
5. /home/opencv/cxcore/src/.libs/libcxcore.a(cxswitcher.o)(.text+0x5d0):cxswitcher.cpp: undefined reference to `_dlclose\'
6. collect2: ld returned 1 exit status
7. make[4]: *** [cxcoretest] Error 1
8. make[4]: Leaving directory `/home/opencv/tests/cxcore/src\'
9. make[3]: *** [check-am] Error 2
10. make[3]: Leaving directory `/home/opencv/tests/cxcore/src\'
11. make[2]: *** [check-recursive] Error 1
12. make[2]: Leaving directory `/home/opencv/tests/cxcore\'
13. make[1]: *** [check-recursive] Error 1
14. make[1]: Leaving directory `/home/opencv/tests\'
15. make: *** [check-recursive] Error 1

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出现错误...

bingpo

make check的错误提示已经很清楚了，告诉你了，找不到dlsym、dlopen之类的函数，这些函数都是dl库中实现的，该库的主要功能就是实现动态库的管理。
所以，自己改下makefile或是在最后的链接命令中加上-ldl即可。如果你的uc没有dl库，那就要禁用程序的动态库功能，全部用静态链接，代码里边所有依赖动态库的地方也要全部改掉。

whiteast

make check的错误提示已经很清楚了，告诉你了，找不到dlsym、dlopen之类的函数，这些函数都是dl库中实现的，该库的主要功能就是实现动态库的管理。
所以，自己改下makefile或是在最后的链接命令中加上-ldl即可。如果你的uc没有dl库，那就要禁用程序的动态库功能，全部用静态链接，代码里边所有依赖动态库的地方也要全部改掉。

太感谢了，刚开始进行跨平台开发，我重新加入命令，只生产静态库，看看效果

全部用静态链接，代码里边所有依赖动态库的地方也要全部改掉

这里的代码指的是测试代码，是吧？

bingpo

不明白你的问题。建议你先google，好好学习一下静态库和动态库的区别，记得我之前写过一篇文章，不过那篇文章重在理论，具体实现方面google可以找到很多。
我那篇文章链接如下：
<!-- l --><a class=\"postlink-local\" href=\"http://www.opencv.org.cn/forum/viewtopic.php?f=1&t=4647\">viewtopic.php?f=1&t=4647</a><!-- l -->