add_breathe_target(
  TARGET_NAME doc-breathe
  SOURCE_DIR ${CMAKE_SOURCE_DIR}/doc/breathe
  DOXY_FILE  ${CMAKE_SOURCE_DIR}/doc/Doxyfile.in
  CONF_FILE  ${CMAKE_SOURCE_DIR}/doc/breathe/conf.py.in
  OUTPUT_DIR ${CMAKE_BINARY_DIR}/doc/breathe
  COMMENT "Documentation in HTML format with Breathe generator"
  )

add_doxygen_target(
  TARGET_NAME doc-doxygen
  SOURCE_DIR  ${CMAKE_SOURCE_DIR}/src
  DOXY_FILE   ${CMAKE_SOURCE_DIR}/doc/Doxyfile.in
  OUTPUT_DIR  ${CMAKE_BINARY_DIR}/doc
  HTML        YES
  LATEX       YES
  COMMENT "Documentation in HTML and LaTeX format with Doxygen"
  )