title: /bin/sh: pkg-config: command not found
body: <p>I'm trying to run hand gesture recognition openCV sample project from this link <a href="https://github.com/simena86/handDetectionCV" rel="nofollow">https://github.com/simena86/handDetectionCV</a>. I run the make command in cygwin terminal, but i'm getting error. I run following command in cygwin terminal E:\handDetectionCVmaster\make</p>
  
  <p>Output:</p>
  
  <pre><code> Arun@Arun-PC /cygdrive/e/handDetectionCVmaster
      $ make
      g++ -o opencv main.cpp myImage.cpp handGesture.cpp roi.cpp  `pkg-config --cflags --libs opencv`
      /bin/sh: pkg-config: command not found
      main.cpp:1:39: error: opencv2/imgproc/imgproc.hpp: No such file or directory
      main.cpp:2:29: error: opencv2/opencv.hpp: No such file or directory
      main.cpp:3:39: error: opencv2/highgui/highgui.hpp: No such file or directory
      In file included from main.cpp:8:
      myImage.hpp:8: error: 'cv' is not a namespace-name
      myImage.hpp:8: error: expected namespace-name before ';' token
      myImage.hpp:15: error: 'Mat' does not name a type
      myImage.hpp:16: error: 'Mat' does not name a type
      myImage.hpp:17: error: 'Mat' does not name a type
      myImage.hpp:18: error: 'Mat' was not declared in this scope
      myImage.hpp:18: error: template argument 1 is invalid
      myImage.hpp:18: error: template argument 2 is invalid
      myImage.hpp:19: error: 'VideoCapture' does not name a type
      In file included from main.cpp:9:
      roi.hpp:9: error: 'cv' is not a namespace-name
      roi.hpp:9: error: expected namespace-name before ';' token
      roi.hpp:14: error: expected ')' before 'upper_corner'
      roi.hpp:15: error: 'Point' does not name a type
      roi.hpp:16: error: 'Mat' does not name a type
      roi.hpp:17: error: 'Scalar' does not name a type
      roi.hpp:19: error: 'Mat' has not been declared
      In file included from main.cpp:10:
      handGesture.hpp:11: error: 'cv' is not a namespace-name
      handGesture.hpp:11: error: expected namespace-name before ';' token
      handGesture.hpp:18: error: 'Point' was not declared in this scope
      handGesture.hpp:18: error: template argument 1 is invalid
      handGesture.hpp:18: error: template argument 2 is invalid
      handGesture.hpp:18: error: template argument 1 is invalid
      handGesture.hpp:18: error: template argument 2 is invalid
      handGesture.hpp:20: error: 'Point' was not declared in this scope
      handGesture.hpp:20: error: template argument 1 is invalid
      handGesture.hpp:20: error: template argument 2 is invalid
      handGesture.hpp:20: error: template argument 1 is invalid
      handGesture.hpp:20: error: template argument 2 is invalid
      handGesture.hpp:21: error: 'Vec4i' was not declared in this scope
      handGesture.hpp:21: error: template argument 1 is invalid
      handGesture.hpp:21: error: template argument 2 is invalid
      handGesture.hpp:21: error: template argument 1 is invalid
      handGesture.hpp:21: error: template argument 2 is invalid
      handGesture.hpp:22: error: 'Point' was not declared in this scope
      handGesture.hpp:22: error: template argument 1 is invalid
      handGesture.hpp:22: error: template argument 2 is invalid
      handGesture.hpp:23: error: 'Rect' does not name a type
      handGesture.hpp:24: error: 'Mat' has not been declared
      handGesture.hpp:29: error: 'Rect' does not name a type
      handGesture.hpp:44: error: 'Point' has not been declared
      handGesture.hpp:44: error: 'Point' has not been declared
      handGesture.hpp:44: error: 'Point' has not been declared
      handGesture.hpp:53: error: 'Scalar' does not name a type
      handGesture.hpp:55: error: 'Point' has not been declared
      handGesture.hpp:55: error: 'Point' has not been declared
      handGesture.hpp:56: error: 'Vec4i' was not declared in this scope
      handGesture.hpp:56: error: template argument 1 is invalid
      handGesture.hpp:56: error: template argument 2 is invalid
      main.cpp:15: error: 'cv' is not a namespace-name
      main.cpp:15: error: expected namespace-name before ';' token
      main.cpp:19: error: 'FONT_HERSHEY_PLAIN' was not declared in this scope
  </code></pre>