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POCompiling Android JNI for OpenCV on Mac OSX
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  1. POCompiling Android JNI for OpenCV on Mac OSX
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    copied!<p>Bear with me - this is a long description, but I wanted to include all details. I'm trying use android NDK and JNI for building OpenCV Android apps. </p> <p>I'm following this tutorial to get everything installed: <a href="http://www.stanford.edu/class/ee368/Android/Tutorial-2-OpenCV-for-Android-Setup-Macintosh-API8.pdf">http://www.stanford.edu/class/ee368/Android/Tutorial-2-OpenCV-for-Android-Setup-Macintosh-API8.pdf</a></p> <p>The following installed just fine:</p> <pre><code>/usr/bin/g++ /usr/local/bin/swig /usr/bin/cmake /usr/bin/make /Developer/pcre-8.32/ </code></pre> <p>Contents of my .bashrc file:</p> <pre><code>export NDK=/Users/Me/Code/Android/android-ndk-r4-crystax export SDK=/Users/Me/Code/Android/adt-bundle-mac-x86_64-20130219/ export OPCV=/Users/Me/Code/OpenCV/opencv export PATH=$NDK:$SDK/tools:$SDK/platform-tools:$PATH export NDK_ROOT=$NDK </code></pre> <p>Making OpenCV libraries went just fine. </p> <p>Due to complaint in using <code>make</code>, I had to make a small edit in <code>/Users/Me/Code/OpenCV/opencv/android/android-jni/local.env.mk</code> which looked like so: </p> <pre><code>#ANDROID_NDK_ROOT=$(HOME)/android-ndk-r4-crystax ANDROID_NDK_ROOT=/Users/Me/Code/Android/android-ndk-r4-crystax </code></pre> <p>Then upon trying again to <code>make</code> in the android-jni, directory, disaster struck:</p> <pre><code>/Users/Me/Code/Android/android-ndk-r4-crystax/ndk-build OPENCV_CONFIG=../build/android-opencv.mk \ PROJECT_PATH= ARM_TARGETS="armeabi armeabi-v7a" V= Gdbserver : [arm-eabi-4.4.0] /Users/Me/Code/OpenCV/opencv/android/android-jni/libs/armeabi/gdbserver Gdbsetup : /Users/Me/Code/OpenCV/opencv/android/android-jni/libs/armeabi/gdb.setup Gdbsetup : + source directory /Users/Me/Code/OpenCV/opencv/android/android-jni/jni Gdbserver : [arm-eabi-4.4.0] /Users/Me/Code/OpenCV/opencv/android/android-jni/libs/armeabi-v7a/gdbserver Gdbsetup : /Users/Me/Code/OpenCV/opencv/android/android-jni/libs/armeabi-v7a/gdb.setup Gdbsetup : + source directory /Users/Me/Code/OpenCV/opencv/android/android-jni/jni SharedLibrary : libandroid-opencv.so /Users/Me/Code/Android/android-ndk-r4-crystax/build/prebuilt/darwin-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld: cannot find -lopencv_calib3d collect2: ld returned 1 exit status make[1]: *** [/Users/Me/Code/OpenCV/opencv/android/android-jni/obj/local/armeabi/libandroid-opencv.so] Error 1 make: *** [libs/armeabi-v7a/libandroid-opencv.so] Error 2 </code></pre> <p>I thought perhaps this was a pkg-config error, but that appears to be set up as well, though in my old install of OpenCV. Below is the output of <code>pkg-config --cflags --libs opencv</code>:</p> <pre><code>-I/usr/include/opencv /usr/lib/libopencv_calib3d.dylib /usr/lib/libopencv_contrib.dylib /usr/lib/libopencv_core.dylib /usr/lib/libopencv_features2d.dylib /usr/lib/libopencv_flann.dylib /usr/lib/libopencv_gpu.dylib /usr/lib/libopencv_highgui.dylib /usr/lib/libopencv_imgproc.dylib /usr/lib/libopencv_legacy.dylib /usr/lib/libopencv_ml.dylib /usr/lib/libopencv_nonfree.dylib /usr/lib/libopencv_objdetect.dylib /usr/lib/libopencv_photo.dylib /usr/lib/libopencv_stitching.dylib /usr/lib/libopencv_ts.dylib /usr/lib/libopencv_video.dylib /usr/lib/libopencv_videostab.dylib </code></pre> <p>The install built by this particular tutorial has placed an <code>opencv.pc</code> file at this location:</p> <pre><code>/Users/Me/Code/OpenCV/opencv/build/unix-install </code></pre> <p>BUT Running the below and trying <code>make</code> again doesn't fix the problem:</p> <pre><code>export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/Users/Me/Code/OpenCV/opencv/build/unix-install </code></pre> <p>I can't figure out what is wrong. I've been battling with this problem for about a month on and off, and finally needed some outside opinions. Any ideas?</p>
 

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