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In the `try_compile` source file signature we propagate the caller's value of `CMAKE_<LANG>_FLAGS` into the test project. Extend this to propagate `CMAKE_<LANG>_FLAGS_<CONFIG>` too instead of always using the default value in the test project. This will be useful, for example, to allow the MSVC runtime library to be changed (e.g. `-MDd` => `-MTd`). However, some projects may currently depend on this not being done, so we need to activate the behavior using a policy. This change was originally made by commit v3.6.0-rc1~160^2 (try_compile: Honor CMAKE_<LANG>_FLAGS_<CONFIG> changes, 2016-04-11) but without the policy and so had to be reverted during the 3.6 release candidate cycle. Fixes #16174.
26 lines
1.1 KiB
ReStructuredText
26 lines
1.1 KiB
ReStructuredText
CMAKE_POLICY_WARNING_CMP<NNNN>
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------------------------------
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Explicitly enable or disable the warning when CMake Policy ``CMP<NNNN>``
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is not set. This is meaningful only for the few policies that do not
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warn by default:
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* ``CMAKE_POLICY_WARNING_CMP0025`` controls the warning for
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policy :policy:`CMP0025`.
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* ``CMAKE_POLICY_WARNING_CMP0047`` controls the warning for
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policy :policy:`CMP0047`.
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* ``CMAKE_POLICY_WARNING_CMP0056`` controls the warning for
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policy :policy:`CMP0056`.
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* ``CMAKE_POLICY_WARNING_CMP0060`` controls the warning for
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policy :policy:`CMP0060`.
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* ``CMAKE_POLICY_WARNING_CMP0065`` controls the warning for
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policy :policy:`CMP0065`.
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* ``CMAKE_POLICY_WARNING_CMP0066`` controls the warning for
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policy :policy:`CMP0066`.
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This variable should not be set by a project in CMake code. Project
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developers running CMake may set this variable in their cache to
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enable the warning (e.g. ``-DCMAKE_POLICY_WARNING_CMP<NNNN>=ON``).
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Alternatively, running :manual:`cmake(1)` with the ``--debug-output``,
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``--trace``, or ``--trace-expand`` option will also enable the warning.
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