How to disable/enable certain features with CMake builds?

[Brad King]

Kurt Pfeifle wrote:
> How do I achieve the equivalent to "configure --disable-agg" or
> "--without-agg" or "--enable-agg=no" or similiar with CMake?

In the KDE CMake code there is or will be the line

OPTION(USE_AGG "AGG SUpport" ON)

which creates a USE_AGG option for the build.  It can either be edited 
in the CMake GUI (such as in the curses dialog of ccmake), or set on the 
command line with

   -DUSE_AGG:BOOL=ON

or

   -DUSE_AGG:BOOL=OFF

-Brad