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33 lines
1.5 KiB
ReStructuredText
33 lines
1.5 KiB
ReStructuredText
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CMP0089
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-------
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.. versionadded:: 3.15
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Compiler id for IBM Clang-based XL compilers is now ``XLClang``.
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CMake 3.15 and above recognize that IBM's Clang-based XL compilers
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that define ``__ibmxl__`` are a new front-end distinct from ``xlc``
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with a different command line and set of capabilities.
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CMake now prefers to present this to projects by setting the
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:variable:`CMAKE_<LANG>_COMPILER_ID` variable to ``XLClang`` instead
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of ``XL``. However, existing projects may assume the compiler id for
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Clang-based XL is just ``XL`` as it was in CMake versions prior to 3.15.
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Therefore this policy determines for Clang-based XL compilers which
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compiler id to report in the :variable:`CMAKE_<LANG>_COMPILER_ID`
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variable after language ``<LANG>`` is enabled by the :command:`project`
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or :command:`enable_language` command. The policy must be set prior
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to the invocation of either command.
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The ``OLD`` behavior for this policy is to use compiler id ``XL``. The
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``NEW`` behavior for this policy is to use compiler id ``XLClang``.
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This policy was introduced in CMake version 3.15. Use the
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:command:`cmake_policy` command to set this policy to ``OLD`` or ``NEW`` explicitly.
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Unlike most policies, CMake version |release| does *not* warn
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by default when this policy is not set and simply uses ``OLD`` behavior.
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See documentation of the
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:variable:`CMAKE_POLICY_WARNING_CMP0089 <CMAKE_POLICY_WARNING_CMP<NNNN>>`
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variable to control the warning.
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.. include:: DEPRECATED.txt
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