Any plans to support multiple rootdirs passed to mkifs?

I tried:
    mkifs -rpath1,path2,path3 
    mkifs -rpath1:path2:path3 and 
    mkifs -rpath1 -rpath2

but "Only one rootdir can be passed" was returned for the third case and the other two cases I guess the deliminator was
 treated as part of the path.

I have a situation where I have a build file and most BSP components are in a subfolder of path1 but a few file 
additional files to include in the IFS are in a separate path2.  I don't have any "control" over the build file and the 
current work around is to a) copy needed files from path2 to path1; or b) make symbolic links.  This is okay but not as 
elegant as passing multiple paths to mkifs.

Thoughts?