Added doxygen target.

Author: Dilawar Singh

CMakeLists.txt

@@ -517,3 +517,17 @@ foreach(_py_script ${PY_SCRIPTS})
     add_dependencies(pylint ${TGT_NAME} )
 endforeach( )
 
+########################  DOCS ###############################################
+find_package(Doxygen)
+if(DOXYGEN_FOUND)
+    set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/devel/Doxyfile.in)
+    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
+    add_custom_target(doc
+        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        COMMENT "Generating API documentation using Doxygen."
+        VERBATIM)
+else()
+    message(STATUS "Doxygen needs to be installed to generate API docs")
+endif()