Hello.

How can I substitute in setup.ml (not in _oasis file) values for
CCOpt and CCLib fields? I think it is better to substitute them from 
setup.data, if I could to put proper values to setup.data.
For example:
  CCOpt: $freetype_ccopt
and put to setup.data output of `freetype-config --clib` for field 
freetype_ccopt.

The expected alternative way:
  $ocaml setup.ml -build --override 'library("library-name").CCOpt' `freetype-config --clib`
does not work, too.

I need a way to substitute paths.

ermine