[Bug 216644] emulators/xen-kernel: fails to build with clang 4.0

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216644

            Bug ID: 216644
           Summary: emulators/xen-kernel: fails to build with clang 4.0
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Keywords: needs-patch
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: royger at freebsd.org
          Reporter: jbeich at FreeBSD.org
            Blocks: 216008
          Assignee: royger at freebsd.org
             Flags: maintainer-feedback?(royger at freebsd.org)

vmx.c:973:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_CS_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:979:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_DS_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:985:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_ES_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:991:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_FS_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:997:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_GS_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:1003:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_SS_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:1009:38: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_TR_BASE,     &reg->base);
                                     ^~~~~~~~~
vmx.c:1014:37: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_GDTR_BASE,  &reg->base);
                                    ^~~~~~~~~
vmx.c:1018:37: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_IDTR_BASE,  &reg->base);
                                    ^~~~~~~~~
vmx.c:1023:40: error: taking address of packed member 'base' of class or
structure 'segment_register' may result in an unaligned pointer value
[-Werror,-Waddress-of-packed-member]
        __vmread(GUEST_LDTR_BASE,     &reg->base);
                                       ^~~~~~~~~


http://package18.nyi.freebsd.org/data/headamd64PR216008-default/2017-01-29_16h09m05s/logs/errors/xen-kernel-4.7.1_3.log


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216008
[Bug 216008] [exp-run] Update llvm/clang/compiler-rt/libc++/lld/lldb in base to
4.0.0
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