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cmake / 3.15 / variable / cmake_policy_warning_cmpnnnn.html

CMAKE_POLICY_WARNING_CMP<NNNN>

Explicitly enable or disable the warning when CMake Policy CMP<NNNN> is not set. This is meaningful only for the few policies that do not warn by default:

  • CMAKE_POLICY_WARNING_CMP0025 controls the warning for policy CMP0025.
  • CMAKE_POLICY_WARNING_CMP0047 controls the warning for policy CMP0047.
  • CMAKE_POLICY_WARNING_CMP0056 controls the warning for policy CMP0056.
  • CMAKE_POLICY_WARNING_CMP0060 controls the warning for policy CMP0060.
  • CMAKE_POLICY_WARNING_CMP0065 controls the warning for policy CMP0065.
  • CMAKE_POLICY_WARNING_CMP0066 controls the warning for policy CMP0066.
  • CMAKE_POLICY_WARNING_CMP0067 controls the warning for policy CMP0067.
  • CMAKE_POLICY_WARNING_CMP0082 controls the warning for policy CMP0082.
  • CMAKE_POLICY_WARNING_CMP0089 controls the warning for policy CMP0089.

This variable should not be set by a project in CMake code. Project developers running CMake may set this variable in their cache to enable the warning (e.g. -DCMAKE_POLICY_WARNING_CMP<NNNN>=ON). Alternatively, running cmake(1) with the --debug-output, --trace, or --trace-expand option will also enable the warning.

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https://cmake.org/cmake/help/v3.15/variable/CMAKE_POLICY_WARNING_CMPNNNN.html