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+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 ... ]
+ [BYPRODUCTS [files...]]
+ [WORKING_DIRECTORY dir]
+ [COMMENT comment]
+ [VERBATIM] [USES_TERMINAL]
+ [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+The target has no output file and is *always considered out of date*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``).
+
+``BYPRODUCTS``
+ Specify the files the command is expected to produce but whose
+ modification time may or may not be updated on subsequent builds.
+ If a byproduct name is a relative path it will be interpreted
+ relative to the build tree directory corresponding to the
+ current source directory.
+ Each byproduct file will be marked with the :prop_sf:`GENERATED`
+ source file property automatically.
+
+ Explicit specification of byproducts is supported by the
+ :generator:`Ninja` generator to tell the ``ninja`` build tool
+ how to regenerate byproducts when they are missing. It is
+ also useful when other build rules (e.g. custom commands)
+ depend on the byproducts. Ninja requires a build rule for any
+ generated file on which another rule depends even if there are
+ order-only dependencies to ensure the byproducts will be
+ available before their dependents build.
+
+ The ``BYPRODUCTS`` option is ignored on non-Ninja generators
+ except to mark byproducts ``GENERATED``.
+
+``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.
+
+ Use the :command:`add_dependencies` command to add dependencies
+ on other targets.
+
+``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.
+
+``USES_TERMINAL``
+ The command will be given direct access to the terminal if possible.
+ With the :generator:`Ninja` generator, this places the command in
+ the ``console`` :prop_gbl:`pool <JOB_POOLS>`.
+
+``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.