Relative paths, intel sdk, cmake, and visual studio plugin

I have a cmake project that I have started adding opencl support to.

For those of you who are not familiar with it, cmake is a cross-platform build system.

Typically, the ide project files reside in a folder separate from the source files.

So, I have everything working now, but I find that I have to specify the absolute path of all *.cl files

when reading in the opencl source before compiling with clCreateProgramWithSource.

 Is there a way of using relative paths?  I can use relative paths when I create the visual studio project

manually, when all *.cl files are in the usual source directory inside the project directory.

Thanks,

Aaron