I understand opencv is installed on the stock debian 8.4 distro included 
with the beaglebone black

i.e. pkg-config --modversion opencv returns 2.4.9.1


However, when I try to compile a simple hello-world test file:

g++ -O2 'pkg-config --cflags --libs opencv' test.cpp -o test


I get an error that there is no such file or directory for opencv,

g++: error: pkg-config --cflags --libs opencv: No such file or directory


I'm running as root, but is there someother setup (path, folder 
permissions) that need to be done first?   


I'm following the tutorial/code directly from here:
http://derekmolloy.ie/beaglebone/beaglebone-video-capture-and-image-processing-on-embedded-linux-using-opencv/

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