[CMake] Strange options for Sun Studio compiler

[Brad King]

Doug Henry wrote:
> I noticed that the default options for build mode may be a bit strange
> for sun compilers.  The release mode uses -xO2 and the minimum size mode
> uses -xO3 (higher optimization level?).  There seems to be an option
> -xspace which reads:
> 
> -xspace               Do not do optimizations that increase code size
> 
> However, I am not familiar with older versions of the sun compilers to
> know if this option is available.

Please include this in your Linux-CC.cmake that you post to the feature
request I mentioned in the other response.  Since no one has used this
compiler before I don't mind including the option until someone
complains their version doesn't have it.

Thanks,
-Brad