argument ARCH is used for building mac/win targets:

use make kat for Linux
mac ARCH=win kat for Windows*
mac ARCH=mac kat for Mac*

*
ARCH=win actually relys on two environmental parametrs
being set:
MINGW binary of mingw-gcccross compiler (including full path)
MINGW binary of mingw-ranlib (with full path)

* 
The ARCH=mac switch merely changes the CFLAGS to not
include 686 switches. Further optimisation can go here.





git-svn-id: svn://lnx0.sr.bham.ac.uk/finesse/trunk@550 96b73bc6-5e0c-0410-b7f3-a0d980c7676b