<LANG>_COMPILER_ID generator expressions
CMake 2.8.12 introduced the
generator expressions to allow comparison of the
CMAKE_<LANG>_COMPILER_ID with a test value. The possible valid values are lowercase, but the comparison with the test value was performed case-insensitively.
The OLD behavior for this policy is to perform a case-insensitive comparison with the value in the
<LANG>_COMPILER_ID expression. The NEW behavior for this policy is to perform a case-sensitive comparison with the value in the
This policy was introduced in CMake version 3.0. CMake version 3.9.0 warns when the policy is not set and uses OLD behavior. Use the cmake_policy command to set it to OLD or NEW explicitly.
OLD behavior of a policy is
deprecated by definition and may be removed in a future version of CMake.
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