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127 lines
5.2 KiB
127 lines
5.2 KiB
add_custom_target
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-----------------
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Add a target with no output so it will always be built.
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::
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add_custom_target(Name [ALL] [command1 [args1...]]
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[COMMAND command2 [args2...] ...]
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[DEPENDS depend depend depend ... ]
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[BYPRODUCTS [files...]]
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[WORKING_DIRECTORY dir]
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[COMMENT comment]
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[VERBATIM] [USES_TERMINAL]
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[COMMAND_EXPAND_LISTS]
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[SOURCES src1 [src2...]])
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Adds a target with the given name that executes the given commands.
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The target has no output file and is *always considered out of date*
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even if the commands try to create a file with the name of the target.
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Use the :command:`add_custom_command` command to generate a file with
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dependencies. By default nothing depends on the custom target. Use
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the :command:`add_dependencies` command to add dependencies to or
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from other targets.
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The options are:
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``ALL``
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Indicate that this target should be added to the default build
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target so that it will be run every time (the command cannot be
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called ``ALL``).
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``BYPRODUCTS``
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Specify the files the command is expected to produce but whose
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modification time may or may not be updated on subsequent builds.
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If a byproduct name is a relative path it will be interpreted
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relative to the build tree directory corresponding to the
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current source directory.
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Each byproduct file will be marked with the :prop_sf:`GENERATED`
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source file property automatically.
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Explicit specification of byproducts is supported by the
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:generator:`Ninja` generator to tell the ``ninja`` build tool
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how to regenerate byproducts when they are missing. It is
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also useful when other build rules (e.g. custom commands)
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depend on the byproducts. Ninja requires a build rule for any
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generated file on which another rule depends even if there are
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order-only dependencies to ensure the byproducts will be
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available before their dependents build.
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The ``BYPRODUCTS`` option is ignored on non-Ninja generators
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except to mark byproducts ``GENERATED``.
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``COMMAND``
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Specify the command-line(s) to execute at build time.
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If more than one ``COMMAND`` is specified they will be executed in order,
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but *not* necessarily composed into a stateful shell or batch script.
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(To run a full script, use the :command:`configure_file` command or the
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:command:`file(GENERATE)` command to create it, and then specify
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a ``COMMAND`` to launch it.)
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If ``COMMAND`` specifies an executable target name (created by the
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:command:`add_executable` command) it will automatically be replaced
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by the location of the executable created at build time. If set, the
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:prop_tgt:`CROSSCOMPILING_EMULATOR` executable target property will
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also be prepended to the command to allow the executable to run on
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the host.
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Additionally a target-level dependency will be added so that the
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executable target will be built before this custom target.
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Arguments to ``COMMAND`` may use
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:manual:`generator expressions <cmake-generator-expressions(7)>`.
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References to target names in generator expressions imply target-level
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dependencies.
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The command and arguments are optional and if not specified an empty
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target will be created.
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``COMMENT``
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Display the given message before the commands are executed at
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build time.
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``DEPENDS``
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Reference files and outputs of custom commands created with
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:command:`add_custom_command` command calls in the same directory
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(``CMakeLists.txt`` file). They will be brought up to date when
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the target is built.
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Use the :command:`add_dependencies` command to add dependencies
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on other targets.
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``COMMAND_EXPAND_LISTS``
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Lists in ``COMMAND`` arguments will be expanded, including those
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created with
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:manual:`generator expressions <cmake-generator-expressions(7)>`,
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allowing ``COMMAND`` arguments such as
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``${CC} "-I$<JOIN:$<TARGET_PROPERTY:foo,INCLUDE_DIRECTORIES>,;-I>" foo.cc``
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to be properly expanded.
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``SOURCES``
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Specify additional source files to be included in the custom target.
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Specified source files will be added to IDE project files for
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convenience in editing even if they have no build rules.
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``VERBATIM``
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All arguments to the commands will be escaped properly for the
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build tool so that the invoked command receives each argument
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unchanged. Note that one level of escapes is still used by the
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CMake language processor before ``add_custom_target`` even sees
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the arguments. Use of ``VERBATIM`` is recommended as it enables
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correct behavior. When ``VERBATIM`` is not given the behavior
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is platform specific because there is no protection of
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tool-specific special characters.
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``USES_TERMINAL``
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The command will be given direct access to the terminal if possible.
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With the :generator:`Ninja` generator, this places the command in
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the ``console`` :prop_gbl:`pool <JOB_POOLS>`.
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``WORKING_DIRECTORY``
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Execute the command with the given current working directory.
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If it is a relative path it will be interpreted relative to the
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build tree directory corresponding to the current source directory.
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Arguments to ``WORKING_DIRECTORY`` may use
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:manual:`generator expressions <cmake-generator-expressions(7)>`.
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