find_package(Doxygen REQUIRED)

# See Doxyfile for these settings:
set(SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/..)
set(USE_DOT "YES")
set(LINT "NO")
set(EXCLUDES "")
# ---

set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile)
set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT})
add_custom_target(
  docs
  COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
  COMMENT "Generating API documentation with Doxygen"
  VERBATIM
)