Updates to support OS X. This improves support for building on

multiple systems with automake, with X Windows and Carbon window
system APIs supported.  It's also a starting port for supporting
win32 builds using mingw.  OS X support is incomplete;  the tree
will compile and link but the binaries will not function.

lib/arch/CArchFileUnix.cpp

@@ -13,6 +13,7 @@
  */
 
 #include "CArchFileUnix.h"
+#include <stdio.h>
 #include <unistd.h>
 #include <pwd.h>
 #include <sys/types.h>