[vbox-dev] More build breakage from Linus

[walt]

In include/iprt/types.h there is this test:

#  ifndef AUTOCONF_INCLUDED
#   include <linux/autoconf.h>
#  endif

The problem is that this recent kernel change breaks it:

commit 6e71fabe9e60b1c6db587fbeac349848647920ab
Author: Arnaud Lacombe
Date:   Sun Dec 5 01:31:57 2010 -0500

     kconfig: do not define AUTOCONF_INCLUDED

     AUTOCONF_INCLUDED is not checked is not used within the tree and its parent
     header, `autoconf.h', is safe to be re-included.