Hello,
Now that Clang 3.5 can build the hypervisor, I was just preparing a
patch to README, and encountered this:
In file included from xc_altp2m.c:23:
In file included from ./xc_private.h:35:
In file included from ./include/xenctrl.h:53:
/local/xen.git/tools/libxc/../../tools/include/xen/foreign/x86_64.h:203:47:
error: 'aligned' attribute ignored when parsing type
[-Werror,-Wignored-attributes]
__align8__ uint64_t evtchn_pending[sizeof(__align8__ uint64_t) * 8];
^~~~~~~~~~
/local/xen.git/tools/libxc/../../tools/include/xen/foreign/x86_64.h:13:36:
note: expanded from macro '__align8__'
# define __align8__ __attribute__((aligned (8)))
^~~~~~~~~~~
/local/xen.git/tools/libxc/../../tools/include/xen/foreign/x86_64.h:204:44:
error: 'aligned' attribute ignored when parsing type
[-Werror,-Wignored-attributes]
__align8__ uint64_t evtchn_mask[sizeof(__align8__ uint64_t) * 8];
^~~~~~~~~~
/local/xen.git/tools/libxc/../../tools/include/xen/foreign/x86_64.h:13:36:
note: expanded from macro '__align8__'
# define __align8__ __attribute__((aligned (8)))
^~~~~~~~~~~
2 errors generated.
In this case, Clang is complaining that the alignment attribute is wrong
for uint64_t. This is correct for 64bit compilations, but wrong for
32bit. On the other hand, I am not sure whether it is sensible to do a
blanket disable of -Wignored-attributes.
Thoughts?
~Andrew
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