[Cmake] Position Independent Libraries, Partial LInking

[Brightland]

A client's existing build system uses ld -r -o to create partially 
linked libraries (this was apparently done due to circular references in 
their libraries). It appears CMake natively supports static and shared 
libraries, but not partially linked libraries. I'm looking for a 
solution that maintains dependency checking while at the same time can 
be used to generate Makefiles for unix, linux, cygwin, and Win32 
(link-order independent static libraries).

Thanks,

John