cd /usr/local/opt/opencv3/share/OpenCV/3rdparty
g++ -dynamiclib -o libippicv.dylib libippicv.a
mv libippicv.dylib /usr/local/opt/opencv3/lib
cd /usr/local/opt/opencv3/lib
install_name_tool -id /usr/local/opt/opencv3/lib/libippicv.dlyb libippicv.dylib
clang -o findContours_demo findContours_demo.cpp `PKG_CONFIG_PATH=/usr/local/opt/opencv3/lib/pkgconfig pkg-config opencv --libs --cflags` -lc++