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Previously we always used content guarded by `$<LINK_ONLY:...>` in `LINK_LIBRARIES`, even when evaluating for non-linking usage requirements. Add a policy to honor `LINK_ONLY` in `LINK_LIBRARIES` the same way we already do in `INTERFACE_LINK_LIBRARIES`.
32 lines
1.3 KiB
ReStructuredText
32 lines
1.3 KiB
ReStructuredText
CMP0131
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.. versionadded:: 3.24
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:prop_tgt:`LINK_LIBRARIES` supports the :genex:`$<LINK_ONLY:...>`
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generator expression.
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CMake 3.23 and below documented the :genex:`$<LINK_ONLY:...>` generator
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expression only for use in :prop_tgt:`INTERFACE_LINK_LIBRARIES`.
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When used in :prop_tgt:`LINK_LIBRARIES`, the content guarded inside
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:genex:`$<LINK_ONLY:...>` was always used, even when collecting non-linking
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usage requirements such as :prop_tgt:`INTERFACE_COMPILE_DEFINITIONS`.
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CMake 3.24 and above prefer to support :genex:`$<LINK_ONLY:...>`, when
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used in :prop_tgt:`LINK_LIBRARIES`, by using the guarded content only
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for link dependencies and not other usage requirements. This policy
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provides compatibility for projects that have not been updated to
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account for this change.
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The ``OLD`` behavior for this policy is to use :prop_tgt:`LINK_LIBRARIES`
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content guarded by :genex:`$<LINK_ONLY:...>` even for non-linking
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usage requirements. The ``NEW`` behavior for this policy is to to use
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the guarded content only for link dependencies.
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This policy was introduced in CMake version 3.24. Use the
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:command:`cmake_policy` command to set this policy to ``OLD`` or ``NEW``
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explicitly. Unlike many policies, CMake version |release| does *not*
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warn when this policy is not set, and simply uses ``OLD`` behavior.
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.. include:: DEPRECATED.txt
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