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I am using Ubuntu 12.04. I get errors while cross-compiling OpenCV for Arm A8. Can someone help to resolve?

$ make
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Scanning dependencies of target pch_Generate_opencv_core
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In file included from /home/hely/OpenCV-2.4.0/modules/ts/precomp.hpp:6:0:
/home/hely/OpenCV-2.4.0/modules/ts/include/opencv2/ts/ts.hpp:306:18: note: the mangling of 'va_list' has changed in GCC 4.4
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cc1plus: warning: include location "/usr/include/OpenEXR" is unsafe for cross-compilation
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cc1plus: warning: include location "/usr/include/atk-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/cairo" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gdk-pixbuf-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pango-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gio-unix-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/glib-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pixman-1" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/libpng12" is unsafe for cross-compilation
Linking CXX static library ../../lib/libopencv_highgui_pch_dephelp.a
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Scanning dependencies of target pch_Generate_opencv_highgui
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cc1plus: warning: include location "/usr/include/OpenEXR" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gtk-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/atk-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/cairo" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gdk-pixbuf-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pango-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gio-unix-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/glib-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pixman-1" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/libpng12" is unsafe for cross-compilation
[ 22%] Built target pch_Generate_opencv_highgui
[ 22%] Generating opencv_imgproc_pch_dephelp.cxx
Scanning dependencies of target opencv_imgproc_pch_dephelp
[ 22%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc_pch_dephelp.dir/opencv_imgproc_pch_dephelp.cxx.o
Linking CXX static library ../../lib/libopencv_imgproc_pch_dephelp.a
[ 22%] Built target opencv_imgproc_pch_dephelp
Scanning dependencies of target pch_Generate_opencv_imgproc
[ 22%] Generating precomp.hpp
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[ 22%] Built target pch_Generate_opencv_imgproc
Scanning dependencies of target opencv_imgproc
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[ 25%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/gabor.cpp.o
[ 25%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/grabcut.cpp.o
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[ 25%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/canny.cpp.o
[ 26%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/phasecorr.cpp.o
[ 26%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/segmentation.cpp.o
[ 26%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/color.cpp.o
[ 26%] Building CXX object modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/floodfill.cpp.o
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Linking CXX shared library ../../lib/libopencv_imgproc.so
[ 26%] Built target opencv_imgproc
Scanning dependencies of target opencv_highgui
[ 26%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap.cpp.o
cc1plus: warning: include location "/usr/include/OpenEXR" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gtk-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/atk-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/cairo" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gdk-pixbuf-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pango-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gio-unix-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/glib-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pixman-1" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/libpng12" is unsafe for cross-compilation
[ 26%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_images.cpp.o
cc1plus: warning: include location "/usr/include/OpenEXR" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gtk-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/atk-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/cairo" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gdk-pixbuf-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pango-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gio-unix-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/glib-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pixman-1" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/libpng12" is unsafe for cross-compilation
[ 27%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o
cc1plus: warning: include location "/usr/include/OpenEXR" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gtk-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/atk-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/cairo" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gdk-pixbuf-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pango-1.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/gio-unix-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/glib-2.0" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/pixman-1" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
cc1plus: warning: include location "/usr/include/libpng12" is unsafe for cross-compilation
In file included from /home/hely/OpenCV-2.4.0/modules/highgui/src/cap_ffmpeg_impl.hpp:56:0,
                 from /home/hely/OpenCV-2.4.0/modules/highgui/src/cap_ffmpeg.cpp:45:
/home/hely/OpenCV-2.4.0/modules/highgui/src/ffmpeg_codecs.hpp:78:36: fatal error: libavformat/avformat.h: No such file or directory
compilation terminated.
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2
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1 Answer 1

You need to install the libavformat headers. Open a terminal and run the following command:

sudo apt-get install libavformat53 libavformat-dev libavcodec53
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