OSXCompatibilityHeaders on Linux

[Joe Mason]

I'm trying to build CoreFoundation-Lite on Linux, but CF-368.25 (from
http://www.opensource.apple.com/darwinsource/Current/) looks for a
directory called "OSXCompatibilityHeaders", which I can't find anywhere:

ifneq "$(PLATFORM)" "Darwin"
# All other platforms need the compatibility headers
    $(SILENT) $(COPY) OSXCompatibilityHeaders/*.h
    $(PUBLIC_HEADER_DIR)/.. #*/    $(SILENT) $(MKDIRS)
    $(PUBLIC_HEADER_DIR)/../GNUCompatibility
    $(SILENT) $(COPY) OSXCompatibilityHeaders/GNUCompatibility/*.h
    $(PUBLIC_HEADER_DIR)/../GNUCompatibility #*/
endif

I found a post saying someone was able to "copy some files from
CarbonHeaders-3.tar.gz", but I can't find a copy of these either.

Where can I get OSXCompatibilityHeaders from?  I don't have access to a
MacOS X machine.

Joe