Compile error with XColor on emacs 21.3 on Macintosh

[Francois Bonzon]

I downloaded emacs 21.3 today. I am using a Macintosh under MacOS 
8.5. When building emacs with MPW version 3.5 (Aug. 2001), I get an 
error. On the next two lines, you find the two commands I gave to MPW 
and then its error transcript (copy-pasted).

make Emacs -f makefile.MPW > Emacs.MakeScript
Emacs.MakeScript

MrC C Compiler 4.1.0f1c1
Copyright (C) 1994-1999 by Apple Computer, Inc.

} XColor;
  ^
File ":src:macfns.c"; line 88 #Error: 'XColor' previously declared as 
something else
It was declared as: struct _N363dispextern.h
It is now declared: struct _N867macfns.c
#-----------------------
### MPW Shell - Execution of Emacs.MakeScript terminated.