CMake/Help/command/add_custom_target.rst

add_custom_target
-----------------

Add a target with no output so it will always be built.

::

  add_custom_target(Name [ALL] [command1 [args1...]]
                    [COMMAND command2 [args2...] ...]
                    [DEPENDS depend depend depend ... ]
                    [WORKING_DIRECTORY dir]
                    [COMMENT comment] [VERBATIM]
                    [SOURCES src1 [src2...]])

Adds a target with the given name that executes the given commands.
The target has no output file and is *always considered out of date*
even if the commands try to create a file with the name of the target.
Use the :command:`add_custom_command` command to generate a file with
dependencies.  By default nothing depends on the custom target.  Use
the :command:`add_dependencies` command to add dependencies to or
from other targets.

The options are:

``ALL``
  Indicate that this target should be added to the default build
  target so that it will be run every time (the command cannot be
  called ``ALL``).

``COMMAND``
  Specify the command-line(s) to execute at build time.
  If more than one ``COMMAND`` is specified they will be executed in order,
  but *not* necessarily composed into a stateful shell or batch script.
  (To run a full script, use the :command:`configure_file` command or the
  :command:`file(GENERATE)` command to create it, and then specify
  a ``COMMAND`` to launch it.)

  If ``COMMAND`` specifies an executable target (created by the
  :command:`add_executable` command) it will automatically be replaced
  by the location of the executable created at build time.
  Additionally a target-level dependency will be added so that the
  executable target will be built before this custom target.

  Arguments to ``COMMAND`` may use
  :manual:`generator expressions <cmake-generator-expressions(7)>`.
  References to target names in generator expressions imply target-level
  dependencies.

  The command and arguments are optional and if not specified an empty
  target will be created.

``COMMENT``
  Display the given message before the commands are executed at
  build time.

``DEPENDS``
  Reference files and outputs of custom commands created with
  :command:`add_custom_command` command calls in the same directory
  (``CMakeLists.txt`` file).  They will be brought up to date when
  the target is built.

``SOURCES``
  Specify additional source files to be included in the custom target.
  Specified source files will be added to IDE project files for
  convenience in editing even if they have no build rules.

``VERBATIM``
  All arguments to the commands will be escaped properly for the
  build tool so that the invoked command receives each argument
  unchanged.  Note that one level of escapes is still used by the
  CMake language processor before ``add_custom_target`` even sees
  the arguments.  Use of ``VERBATIM`` is recommended as it enables
  correct behavior.  When ``VERBATIM`` is not given the behavior
  is platform specific because there is no protection of
  tool-specific special characters.

``WORKING_DIRECTORY``
  Execute the command with the given current working directory.
  If it is a relative path it will be interpreted relative to the
  build tree directory corresponding to the current source directory.