Look what I found in http://www.opensource.apple.com/bugs/numericIndex.html

[LHelldorf]

Couldn't this be a solution for GNUstep on WIN32?

X / CoreFoundation / Bug: 2783382
------------------------------------------------------------------------
ID      Title   Assignee        Last Modified   State   Severity
2783382 Submission: Port of CoreFoundation for WIN32    C.K.    10/10/2001 
Analyze (3) Has Workaround

Problem Description

<GMT01-Oct-2001 23:07:19GMT> R.D.:
From: Aleksey Dukhnyakov, Orc Software <daa@orcsoftware.spb.ru>
module: Darwin/CoreFoundation
description: Port of CoreFoundation for WIN32
url: http://orcsoftware.spb.ru/Files/CoreFoundation_Win32.tar.gz
notes: We have ported CoreFoundation for Win32 platform(mingw package) 


Problem Diagnosis

<GMT02-Oct-2001 01:38:37GMT> C.K.:
Hmmm, the diffs are pretty huge.

<GMT08-Oct-2001 21:32:29GMT> R.D.:
From: Aleksey Dukhnyakov, Orc Software <daa@orcsoftware.spb.ru>
module: Darwin/CoreFoundation
description: Port of CoreFoundation for WIN32 (Second version)
url: http://orcsoftware.spb.ru/Files/CoreFoundation_Win32.tar.gz
notes: Fixed Win32 specific code, added some comments and project is known 
to
build with no hassle for Win32, Darwin and Linux target platforms. To
build the project for Win32 we used MinGW-1.0.1 package and binutils
cp, ln, rm, mkdir... This code was tested and found to run OK on
Windows 2000. 

Greetings, Lars