LProf links LCMS and also some parts of ArgyllCMS but much of the profiling code is specific to LProf. When LProf displays a proof in the camera/scanner profiler it uses LCMS to do the transform. The instrument support code and some of the regression analysis code is from ArgyllCMS. LProf also uses LCMS to generate the basic profile object and to do basic profile manipulations like adding tags and tag data like CLUT tables and measurement data.