OpenCV Installing (make) errors on /modules/objdetect/

Question

im a total noob to raspberry and I want to create an opencv gesture recognizing app with the pi camera (the one which is connected thru the socket next to the hdmi port) and was installing opencv 3.1.0 thru terminal, and started building it with the make command, but after 12 hours I got an error and it just halted.

First question is: How can I fix the error? (See terminal output below)

And next one is, do I have to restart the whole process and wait 13 hours in order to see if it works or not?

Heres the terminal output at the moment of the error:

    Scanning dependencies of target opencv_test_objdetect
[ 45%] Building CXX object modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/test/test_cascadeandhog.cpp.o
[ 45%] Building CXX object modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/test/opencl/test_hogdetector.cpp.o
[ 46%] Building CXX object modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/test/test_main.cpp.o
Linking CXX executable ../../bin/opencv_test_objdetect
collect2: error: ld returned 1 exit status
modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/build.make:160: recipe for target 'bin/opencv_test_objdetect' failed
make[2]: *** [bin/opencv_test_objdetect] Error 1
CMakeFiles/Makefile2:6616: recipe for target 'modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/all' failed
make[1]: *** [modules/objdetect/CMakeFiles/opencv_test_objdetect.dir/all] Error 2
Makefile:147: recipe for target 'all' failed
make: *** [all] Error 2

Answer 1

You don't really need OpenCV as it is designed to be used over GPU.

You can use instead NumPy.

In order to recognize gestures you will need to use convolutional networks for wich you will need SIMD(Single Instruction Multiple Data) hardware componenets.

Answer 2

You can try installing openFrameworks, it includes openCV. There is a tutorial here

Make sure you run :

• apt-get clean
• apt-get update
• apt-get upgrade

Answer 3

Turns out that the problem had to do with Disc Space issues... Seems like a file on the sd card got corrupted. Bought a new sd card and installed everything from scratch again, and this time it worked. Thank you all for the answers.