Download instructions for AddressBook framework

[Andreas Höschler]

Hi all

I am tryingto build GNUMail. Though not mentioned it seems this app 
depends on a framework called AddressBook.

 Compiling file FilterEditorWindowController.m ...
FilterEditorWindowController.m:41:37: warning: 
AddressBook/AddressBook.h: No such file or directory
FilterEditorWindowController.m: In function 
`-[FilterEditorWindowController(Private) _setupGroupsPopUpButton:]':
FilterEditorWindowController.m:858: error: `ABGroup' undeclared (first 
use in this function)
FilterEditorWindowController.m:858: error: (Each undeclared identifier 
is reported only once
FilterEditorWindowController.m:858: error: for each function it appears 
in.)
FilterEditorWindowController.m:858: error: `aGroup' undeclared (first 
use in this function)
FilterEditorWindowController.m:861: error: `ABAddressBook' undeclared 
(first use in this function)
FilterEditorWindowController.m:865: error: `kABGroupNameProperty' 
undeclared (first use in this function)
make[2]: *** [shared_obj/FilterEditorWindowController.o] Error 1
make[1]: *** [Filtering.all.bundle.variables] Error 2
make[1]: Leaving directory `/usr/share/src/GNUMail/Bundles/Filtering'
make: *** [internal-all] Error 2

My attempts to find the sources of this framework via google failed so 
far. I found a few links but they are all dead. Any help would be 
appreciated.

Thanks,

  Andreas