Catkin build uses opencv 2.4.8 instead of 3

[muttistefano]

Hello, i'm compiling viso2 on Raspberry pi 3, but this error comes out every time:
No rule to make target '/usr/lib/arm-linux-gnueabihf/libopencv_video.so.2.4.8', needed by '/home/pi/eureca/devel/.private/viso2_ros/lib/viso2_ros/mono_odometer' , for every opencv library .
I specified opencv3 in the CMakefiles but it always complains about the missing file.
I also recompiled cv_bridge with opencv 3 just to be sure but it wont work.
How can i use opencv3 ?
Thanks