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- CMP0012
- -------
- if() recognizes numbers and boolean constants.
- In CMake versions 2.6.4 and lower the if() command implicitly
- dereferenced arguments corresponding to variables, even those named
- like numbers or boolean constants, except for 0 and 1. Numbers and
- boolean constants such as true, false, yes, no, on, off, y, n,
- notfound, ignore (all case insensitive) were recognized in some cases
- but not all. For example, the code "if(TRUE)" might have evaluated as
- false. Numbers such as 2 were recognized only in boolean expressions
- like "if(NOT 2)" (leading to false) but not as a single-argument like
- "if(2)" (also leading to false). Later versions of CMake prefer to
- treat numbers and boolean constants literally, so they should not be
- used as variable names.
- The OLD behavior for this policy is to implicitly dereference
- variables named like numbers and boolean constants. The NEW behavior
- for this policy is to recognize numbers and boolean constants without
- dereferencing variables with such names.
- This policy was introduced in CMake version 2.8.0. CMake version
- |release| warns when the policy is not set and uses OLD behavior. Use
- the cmake_policy command to set it to OLD or NEW explicitly.
- .. include:: DEPRECATED.txt
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