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POBuild opencv application for ARM on x86
 

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  1. POBuild opencv application for ARM on x86
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    <p>I have problem with building aplication with opencv library for ARM. I installed Opencv 2.4.6.1 for my pc with helping this a tutorial <a href="http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#linux-installation" rel="nofollow">http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#linux-installation</a></p> <p>After that i try build example for my pc:</p> <pre><code>gcc main.c -o main ´pkg-config --libs --clags opencv´ -lpthread </code></pre> <p>It works.</p> <p>Next, i install arm-linux-gnueabihf-gcc, wrote example and tryied it. It works.</p> <p>now i make opencv library for ARM</p> <pre><code>cd /opt/opencv-2.4.6.1/platforms/linux mkdir build_hardfp pico arm-gnueabi.toolchain.cmake change 4.6 to 4.7.2 cd build_hardfp cmake -DCMAKE_TOOLCHAIN_FILE=../arm-gnueabi.toolchain.cmake -DWITH_TBB=OFF -DWITH_QT=OFF -D SOFTFP=OFF -D WITH_V4L=ON -D WITH_OPENGL=ON –D CMAKE_BUILD_TYPE=RELEASE –D BUILD_SHARED_LIBS=OFF -D CMAKE_INSTALL_PREFIX=/opt/opencv-2.4.6.1/rpi ../../.. make make install </code></pre> <p>And now my problem:</p> <p>I try build my example</p> <pre><code>arm-linux-gnueabihf-gcc -o main main.c -lpthread -I/opt/opencv-2.4.6.1/rpi/include -I/opt/opencv-2.4.6.1/rpi/include/opencv -I/opt/opencv-2.4.6.1/rpi/lib -L/opt/opencv-2.4.6.1/rpi/ -lcv -lhighgui </code></pre> <p>main.c: In function ‘main’: main.c:12:8: warning: assignment makes pointer from integer without a cast [enabled by default] /home/honza/rpi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lcv /home/honza/rpi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lhighgui collect2: error: ld returned 1 exit status</p> <p>Probably i must have all the dependencies compile for ARM architecture. I think, i took care of this in previous steps, with using cmake. Maybe i didn't set paths.</p> <p>What am I doing wrong and how to fix it?</p>
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    1. COShould -I/opt/opencv-2.4.6.1/rpi/lib be -L instead?
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