[CMake] Ensuring not building for 64-bit

[Michael Jackson]

The double __LP64__ is making sure it (__LP64__) is both DEFINED and  
TRUE.

# if defined ((__APPLE__)) && defined(__LP64__) && __LP64__
typedef CIconHandle  OSColorIcon;  // Mac CIcon
#else

#endif

_________________________________________________________
Mike Jackson                  mike.jackson at bluequartz.net
BlueQuartz Software                    www.bluequartz.net
Principal Software Engineer                  Dayton, Ohio



On Aug 17, 2009, at 12:03 PM, ML wrote:

> Hi Mike,
>
>> # if defined ((__APPLE__)) && defined(__LP64__) && __LP64__
>> // 64 bit headers/defines/typedefs here
>> #else
>> // 32 bit headers/defines/typedefs here
>
> Can you clarify a few points?
>
> Why two __LP64__ in your #if?
>
> How would I handle if the 64-bit version of the header is not avail?  
> Define the 32-bit there anyway? Doesn't this just keep me in the  
> same situation I am in now where headers are not available for 64-bit?
>
> -Jason
>