Error while compiling Chameleon UIKit

[Amr Aboelela]

amr@ayesha:~/develop/caramel/frameworks/UIKit$ make
This is gnustep-make 2.4.0. Type 'make print-gnustep-make-help' for help.
Making all for library libUIKit...
 Compiling file Classes/UIView.m ...
clang: warning: argument unused during compilation: '-fexec-charset=UTF-8'
In file included from Classes/UIView.m:40:
In file included from /usr/local/include/GNUstep/QuartzCore/CALayer.h:6:
In file included from /usr/local/include/GNUstep/QuartzCore/CAMediaTiming.h:6:
In file included from /usr/local/include/GNUstep/QuartzCore/CABase.h:16:
In file included from /usr/local/include/GNUstep/CoreFoundation/CoreFoundation.h:30:
/usr/local/include/GNUstep/CoreFoundation/CFBase.h:149:23: error: redefinition of typedef 'CFTypeID' is invalid in C [-Wtypedef-redefinition]
typedef unsigned long CFTypeID;
                      ^
In file included from Classes/UIView.m:30:
In file included from Classes/UIView+UIPrivate.h:30:
In file included from Classes/UIView.h:31:
In file included from Classes/UIGeometry.h:31:
In file included from /usr/local/include/GNUstep/ApplicationServices/ApplicationServices.h:18:
In file included from /usr/local/include/GNUstep/CoreGraphics/CoreGraphics.h:27:
/usr/local/include/GNUstep/CoreGraphics/CGBase.h:50:23: note: previous definition is here
typedef unsigned long CFTypeID;
                      ^
In file included from Classes/UIView.m:40:
In file included from /usr/local/include/GNUstep/QuartzCore/CALayer.h:6:
In file included from /usr/local/include/GNUstep/QuartzCore/CAMediaTiming.h:6:
In file included from /usr/local/include/GNUstep/QuartzCore/CABase.h:16:
In file included from /usr/local/include/GNUstep/CoreFoundation/CoreFoundation.h:30:
/usr/local/include/GNUstep/CoreFoundation/CFBase.h:150:21: error: typedef redefinition with different types ('void const *' vs 'NSObject *')
typedef const void *CFTypeRef;
                    ^
In file included from Classes/UIView.m:30:
In file included from Classes/UIView+UIPrivate.h:30:
In file included from Classes/UIView.h:31:
In file included from Classes/UIGeometry.h:31:
In file included from /usr/local/include/GNUstep/ApplicationServices/ApplicationServices.h:18:
In file included from /usr/local/include/GNUstep/CoreGraphics/CoreGraphics.h:27:
/usr/local/include/GNUstep/CoreGraphics/CGBase.h:56:19: note: previous definition is here
typedef NSObject *CFTypeRef;


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