OpenCV wont make?

(assuming this is accessibility as its controling the cursor withought the mouse)

yeah i've been trying to install OpenCV yet it wont make...it comes up with this line of code in the terminal

make  all-recursive
make[1]: Entering directory `/usr/local/src/opencv-1.0.0'
Making all in cxcore
make[2]: Entering directory `/usr/local/src/opencv-1.0.0/cxcore'
Making all in src
make[3]: Entering directory `/usr/local/src/opencv-1.0.0/cxcore/src'
if /bin/bash ../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I. -I../../cxcore/include -I../..  -DNDEBUG   -Wall -fno-rtti -pipe -O3 -g -march=i686 -ffast-math -fomit-frame-pointer -fno-strict-aliasing -MT cxalloc.lo -MD -MP -MF ".deps/cxalloc.Tpo" -c -o cxalloc.lo cxalloc.cpp; \
    then mv -f ".deps/cxalloc.Tpo" ".deps/cxalloc.Plo"; else rm -f ".deps/cxalloc.Tpo"; exit 1; fi
 g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I. -I../../cxcore/include -I../.. -DNDEBUG -Wall -fno-rtti -pipe -O3 -g -march=i686 -ffast-math -fomit-frame-pointer -fno-strict-aliasing -MT cxalloc.lo -MD -MP -MF .deps/cxalloc.Tpo -c cxalloc.cpp  -fPIC -DPIC -o .libs/cxalloc.o
In file included from _cxcore.h:60,
                 from cxalloc.cpp:42:
../../cxcore/include/cxmisc.h:133:6: error: #elif with no expression
make[3]: *** [cxalloc.lo] Error 1
make[3]: Leaving directory `/usr/local/src/opencv-1.0.0/cxcore/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/local/src/opencv-1.0.0/cxcore'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/local/src/opencv-1.0.0'
make: *** [all] Error 2

Did u get the solution. I'm facing the same problem. Please do help....

Have either of you checked the OpenCV wiki?

OpenCV 2.x does build using the recipe from the OpenCV wiki. http://opencv.willowgarage.com/wiki/InstallGuide_Linux. The samples run. I don't have a webcam. Some of the samples require webcam.

Two things:

I wished I had used check install instead of make install to gain package removal.

the ubuntu repositories for OpenCV 1.0 make you remove one of the codec libs used by video programs, but that doesn't seem to affect ffmpeg.

Everyone seems overly-eager to make Face Recognition with OpenCV and a webcam. I want Object Recognition from a file graphic. So now, I'm trying to link OpenCV - Java - Processing. I have a link issue, Processing wants OpenCV 1.0. I may push on and try [shudder] JNI to use the OpenCV 2.0 libs.

For all the people finding this topic through google (like me): I 'solved' this problem by commenting out the line cxcore/include/cxmisc.h:133 + 134. Make went fine after that. I am now at the stage of compiling against the lib but i think this does not change the functionality.

This is how the part now looks:

#elif defined HAVE_ALLOCA
    #include <stdlib.h>
//#elif
//    #error
#endif

Apparently a newer version of GCC changes the pre-processor, so this command elif without any expression will result in a compilation error.

http://gcc.gnu.org/gcc-4.4/porting_to.html

So, to fix this change the elif to else, and it compiles functionally.

Frizzle said: For all the people finding this topic through google (like me): I 'solved' this problem by commenting out the line cxcore/include/cxmisc.h:133 + 134. Make went fine after that. I am now at the stage of compiling against the lib but i think this does not change the functionality.

This is how the part now looks:

#elif defined HAVE_ALLOCA
    #include <stdlib.h>
//#elif
//    #error
#endif

instead of commenting out line 133-134, you should change "#elif" to "#else". that is the proper way to do it. but i am not sure if it makes a difference...

Are you aware that openCV is in the repositories? It is called libcv though.

The End of The World said: (assuming this is accessibility as its controling the cursor withought the mouse)

yeah i've been trying to install OpenCV yet it wont make...it comes up with this line of code in the terminal

make  all-recursive
make[1]: Entering directory `/usr/local/src/opencv-1.0.0'
Making all in cxcore
make[2]: Entering directory `/usr/local/src/opencv-1.0.0/cxcore'
Making all in src
make[3]: Entering directory `/usr/local/src/opencv-1.0.0/cxcore/src'
if /bin/bash ../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I. -I../../cxcore/include -I../..  -DNDEBUG   -Wall -fno-rtti -pipe -O3 -g -march=i686 -ffast-math -fomit-frame-pointer -fno-strict-aliasing -MT cxalloc.lo -MD -MP -MF ".deps/cxalloc.Tpo" -c -o cxalloc.lo cxalloc.cpp; \
    then mv -f ".deps/cxalloc.Tpo" ".deps/cxalloc.Plo"; else rm -f ".deps/cxalloc.Tpo"; exit 1; fi
 g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I. -I../../cxcore/include -I../.. -DNDEBUG -Wall -fno-rtti -pipe -O3 -g -march=i686 -ffast-math -fomit-frame-pointer -fno-strict-aliasing -MT cxalloc.lo -MD -MP -MF .deps/cxalloc.Tpo -c cxalloc.cpp  -fPIC -DPIC -o .libs/cxalloc.o
In file included from _cxcore.h:60,
                 from cxalloc.cpp:42:
../../cxcore/include/cxmisc.h:133:6: error: #elif with no expression
make[3]: *** [cxalloc.lo] Error 1
make[3]: Leaving directory `/usr/local/src/opencv-1.0.0/cxcore/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/local/src/opencv-1.0.0/cxcore'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/local/src/opencv-1.0.0'
make: *** [all] Error 2

http://stackoverflow.com/questions/11470217/compile-opencv-2-4-2-for-debian-lenny

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