Make / install
On linux, the easiest way to use CMake is just to let it create a makefile for you. You can then use this makefile in the same way you normally would.
> cmake ../dnp3 <options> > make -j > sudo make install
CMake also supports cross-compiling to embedded-linux platforms. How to do this is outside the scope of this documentation, but is explained here.
The preferred method is to create a toolchain file for each target platform.