Opencv - Build Opencv failed (MacOSX)

Question

I installed opencv using homebrew. There's no jar file. Can't seem to find the jar file. Tried downloading again - opencv 2.4.3, 2.4.7, 2.4.8. again tried to build but getting errors in the middle of building jar file. I'm trying to make a OpenCV Java project in Netbeans. I tried to look for jar file. Since it's not there, I build the Opencv but getting error.

Trying this to build OpenCv jar:

$ cd opencv-2.4.7

$ mkdir build

$ cd build/

$ cmake -G "Unix Makefiles" -D CMAKE_CXX_COMPILER=/usr/bin/g++ -D CMAKE_C_COMPILER=/usr/bin/gcc -D WITH_CUDA=ON .. 

$make -j4 

$ make install

I'm on MacOSX 10.8.5. Any help would be greatly appreciated.

The error I'm getting is :

BUILD FAILED

/Users/ih/Downloads/opencv-2.4.7/build/build.xml:9: Class not
 found: javac1.8

 Total time: 0 seconds make[2]: *** [bin/opencv-247.jar] Error 1
 make[1]: *** [modules/java/CMakeFiles/opencv_java.dir/all] Error 2
 make[1]: *** Waiting for unfinished jobs.... Linking CXX shared
 library ../../lib/cv2.so [ 89%] Built target opencv_python make: ***
 [all] Error 2

Just to confirm I do have javac installed.

I added a link. Here I pasted the error I got when building it. @berak — drifterOcean19
– drifterOcean19, Commented Apr 9, 2014 at 17:12

almanegra · Accepted Answer · 2014-04-09 19:33:19Z

1

Try using CMake instead of Homebrew (follow this tutorial).

Regards.

answered Apr 9, 2014 at 19:33

almanegra

6639 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

drifterOcean19 Over a year ago

Hi, I managed to finally built it. thank you! I was wondering where is the .jar file? I went into OpenCV-2.4.3/build/bin but it's not there?

Mengyuan · Accepted Answer · 2015-01-14 06:04:01Z

I had the same problem previously, since my previous jdk used is 1.8. Then I solved it by set the jvm to the lower version. See what are the available versions:

/usr/libexec/java_home -V

for me, my versions are listed as:

Matching Java Virtual Machines (4):

1.8.0_25, x86_64: "Java SE 8" >/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home 1.7.0_60, x86_64: "Java SE 7" >/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home 1.6.0_65-b14-462, x86_64: "Java SE 6" >/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

Then I simply set the java version by set JAVA_HOME:

export JAVA_HOME=/usr/libexec/java_home -v 1.7.0_60

Finally, the OpenCV installation went well! Hope it helps!

Collectives™ on Stack Overflow

Opencv - Build Opencv failed (MacOSX)

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related