todays xen-unstable is throwing gcc errors when compiling on PPC

[Jerone Young <jyoung5@us.ibm.com>]

When compiling Xen on PPC today I get the following error that is being
caused by casting (u32 *). Once the cast is removed all is well and
things compile fine. Is this happening on x86 or x86-64 ? I'm using gcc
4.1.0 on Suse SLES 10.

There Error:
grant_table.c: In function ‘gnttab_prepare_for_transfer’:
grant_table.c:825: warning: dereferencing type-punned pointer will break
strict-aliasing rules
grant_table.c: In function ‘__acquire_grant_for_copy’:
grant_table.c:1055: warning: dereferencing type-punned pointer will
break strict-aliasing rules
grant_table.c:1080: warning: dereferencing type-punned pointer will
break strict-aliasing rules
grant_table.c:1080: warning: dereferencing type-punned pointer will
break strict-aliasing rules
grant_table.c:1080: warning: dereferencing type-punned pointer will
break strict-aliasing rules
grant_table.c:1080: warning: dereferencing type-punned pointer will
break strict-aliasing rules
grant_table.c:1080: warning: dereferencing type-punned pointer will
break strict-aliasing rules
make[3]: *** [grant_table.o] Error 1
make[3]: Leaving directory `/Work/xen-unstable.hg/xen/common'
make[2]: *** [/Work/xen-unstable.hg/xen/common/built_in.o] Error 2
make[2]: Leaving directory `/Work/xen-unstable.hg/xen/arch/powerpc'
make[1]: *** [/Work/xen-unstable.hg/xen/xen] Error 2
make[1]: Leaving directory `/Work/xen-unstable.hg/xen'
make: *** [build] Error 2