opencv make does not create jar file

tonj · 04-22-2014, 04:50 AM

I'm running fedora 20 64 bit and trying to follow the instructions here: https://www.openshift.com/blogs/day-...ava-developers
I untar opencv-2.4.7.tar.gz and run the commands and all run fine without errors, but at the end of it all I do not get the opencv-247.jar file in the opencv-2.4.7/build/bin directory as the doc says. The best I could find on google about this was that 'some dependencies are probably missing' but I don't know what dependencies these are. Before starting on opencv I've tried these steps:
yum-builddep java-1.8.0-openjdk.x86_64
yum-builddep openvcv
yum install java-1.8.0-openjdk.x86_64 java-1.8.0-openjdk-devel.x86_64
the above commands install loads of stuff but still opencv does not create a jar file. I'm stumped here, can anyone help?
I also posted this query on the opencv forum but the help there is a bit thin so I'm trying here as well.

knudfl · 04-22-2014, 08:02 AM

What does the "java section" in your configuring say ?
( Configuring = $ cmake -G "Unix Makefiles" -D CMAKE_CXX_COMPILER=/usr/bin/g++ -D CMAKE_C_COMPILER=/usr/bin/gcc -D WITH_CUDA=ON ../ ).

Code:

--   Java:
--     ant:                         /usr/bin/ant (ver 1.9.3)
--     JNI:                         /usr/lib/jvm/java/include /usr/lib/jvm/java/include/linux /usr/lib/jvm/java/include
--     Java tests:                  YES

? Is ant present ?
# yum install ant

* I made a test build with the "java modules".
I.e. can be be done before you build the other OpenCV files :
$ cd opencv-2.4.8/build/modules/java/ && make
... and `opencv-248.jar´ appeared in "opencv-2.4.8/build/bin/".

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tonj · 04-22-2014, 10:47 AM

yes thankyou for your help knudfl, yum install ant did it.