[CMake] BOOL type

[Bill Hoffman]

Alexander Neundorf wrote:
> On Monday 17 December 2007, Brandon Van Every wrote:
>> I propose the addition of a BOOL type to the CMake language.
>>
>>   bool(variable [value])
>>
>> would declare a variable of type BOOL, with an optional value
>> supplied.  Any SET commands performed on the variable in its scope
>> would be subject to boolean type constraint.  A BOOL can take on the
>> following values.  Any other assignment is an error.
>>
>>   "TRUE" class - TRUE, 1, Y, Yes, YES, y, yes, ON
>>   "FALSE" class - FALSE, 0, N, n, No, NO, OFF, <empty>
> 
> Attached is a patch which removes "Y" and "N" from the recognized values for 
> true/false.
> This patch may break stuff. I don't know if there are many people who rely 
> on "N" and "Y".
> 

I am sure it will break something....  I don't think we can change it now.

-Bill