Private headers in GSMake frameworks?

[Uli Kusterer]

Hi,

 on MacOS X, frameworks can have a "Headers" directory for a framework's 
public headers, and a "PrivateHeaders" directory for headers that are 
used for an app that comes with the framework, but aren't supposed to be 
used by other clients of the framework.

I've found FrameworkName_HEADER_FILES for specifying "Headers", but is 
there an equivalent to "PrivateHeaders" in GNUstep-make? What's the 
variable called?

Thanks for any help.
-- M. Uli Kusterer
http://www.zathras.de