[Cmake] BUILD_SHARED vs BUILD_SHARED_LIBS ambiguity

[Bradley Lowekamp]

Hello,
	I trying to get my project to do cross platform shared libraries. I am 
reading through the documentation in the CMake book and  I have found 
that the description of these two variables ambiguates what ADD_LIBRARY 
is suppose to do. I am using a very recent (in the past week) version 
of CMake. When I only have BUILD_SHARED as an option, it always seems 
to generate static libraries. When I tries setting BUILD_SHARED_LIBS 
based on BUILD_SHARED, it always seemed to generate shared libraries 
even if BUILD_SHARED_LIBS was set to STATIC.
	So, What determines what ADD_LIBRARY is suppose to do?

Thanks,
 >Brad