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export
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------
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Export targets from the build tree for use by outside projects.
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::
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export(EXPORT <export-name> [NAMESPACE <namespace>] [FILE <filename>])
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Create a file ``<filename>`` that may be included by outside projects to
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import targets from the current project's build tree. This is useful
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during cross-compiling to build utility executables that can run on
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the host platform in one project and then import them into another
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project being compiled for the target platform. If the ``NAMESPACE``
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option is given the ``<namespace>`` string will be prepended to all target
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names written to the file.
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Target installations are associated with the export ``<export-name>``
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using the ``EXPORT`` option of the :command:`install(TARGETS)` command.
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The file created by this command is specific to the build tree and
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should never be installed. See the :command:`install(EXPORT)` command to
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export targets from an installation tree.
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The properties set on the generated IMPORTED targets will have the
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same values as the final values of the input TARGETS.
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::
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export(TARGETS [target1 [target2 [...]]] [NAMESPACE <namespace>]
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[APPEND] FILE <filename> [EXPORT_LINK_INTERFACE_LIBRARIES])
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This signature is similar to the ``EXPORT`` signature, but targets are listed
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explicitly rather than specified as an export-name. If the APPEND option is
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given the generated code will be appended to the file instead of overwriting it.
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The EXPORT_LINK_INTERFACE_LIBRARIES keyword, if present, causes the
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contents of the properties matching
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``(IMPORTED_)?LINK_INTERFACE_LIBRARIES(_<CONFIG>)?`` to be exported, when
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policy CMP0022 is NEW. If a library target is included in the export
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but a target to which it links is not included the behavior is
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unspecified.
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::
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export(PACKAGE <name>)
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Store the current build directory in the CMake user package registry
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for package ``<name>``. The find_package command may consider the
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directory while searching for package ``<name>``. This helps dependent
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projects find and use a package from the current project's build tree
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without help from the user. Note that the entry in the package
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registry that this command creates works only in conjunction with a
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package configuration file (``<name>Config.cmake``) that works with the
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build tree. In some cases, for example for packaging and for system
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wide installations, it is not desirable to write the user package
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registry. If the :variable:`CMAKE_EXPORT_NO_PACKAGE_REGISTRY` variable
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is enabled, the ``export(PACKAGE)`` command will do nothing.
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