variable_requires() command should not be called.
This command was introduced in November 2001 to perform some conditional logic. It has long been replaced by the
CMake >= 3.0 prefer that this command never be called. The
OLD behavior for this policy is to allow the command to be called. The
NEW behavior for this policy is to issue a
FATAL_ERROR when the command is called.
This policy was introduced in CMake version 3.0. CMake version 3.15.2 warns when the policy is not set and uses
OLD behavior. Use the
cmake_policy() command to set it to
OLD behavior of a policy is
deprecated by definition and may be removed in a future version of CMake.
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