message: doc/linux/build_instructions.md: added tutorial for generating doxygen doc
diff: @@ -109,3 +109,23 @@ cd build
  cmake -DCMAKE_PREFIX_PATH="/opt/glog;/opt/protobuf;/opt/websockets;/opt/opencv" -DWITH_EXAMPLES=on ..
  make -j4
  ```
  +
  +## Generate doxygen documentation
  +
  +Requirements:
  +* Doxygen
  +* Graphviz
  +
  +```console
  +sudo apt-get install doxygen doxygen-doc doxygen-gui graphviz
  +```
  +
  +In order to generate the doxygen documentation you must compile the sdk in the following way:
  +```console
  +cmake -DCMAKE_PREFIX_PATH="/opt/glog;/opt/protobuf;/opt/websockets;/opt/opencv" -DWITH_DOC=on ..
  +make -j4 doc
  +```
  +After compilation, the documentation could be found at this path:
  +```console
  +build/doc/doxygen_doc/html/index.html
  +```
  