add_custom_target(Name [ALL] [command1 [args1...]]
  [COMMAND command2 [args2...] ...]
  [DEPENDS depend depend depend ... ]
  [BYPRODUCTS [files...]]
  [WORKING_DIRECTORY dir]
  [COMMENT comment]
  [JOB_POOL job_pool]
  [JOB_SERVER_AWARE <bool>]
  [VERBATIM] [USES_TERMINAL]
  [COMMAND_EXPAND_LISTS]
[SOURCES src1 [src2...]])