This is already done, most files which have Wine code are labeled so
atop of the file ("Some parts are taken from Wine project..."). What
I see is that Dmitry Timoshkov says this is not enough.
On Nov 19, 2008, at 4:40 PM, Dmitry Gorbachev wrote:
  gedmurphy wrote:
  Let's say you implement a function in our
win32k, based on Wine
 code. How
 exactly would you realistically discover which Wine dev wrote that
 function, and if the function was merely _based_ on wine code,
 which parts
 of the function would you attribute credit to, and how would you
 do it? 
 I think if the dev is not known, then all authors should be
 credited. I.e.:
 "Parts of this file are Copyright (C) ... ". Or: to gather the
 original Wine
 copiright notices into a separate file and put a pointer to it in
 any file
 which is based on Wine.