BIND 10 #2147: boost::offset_ptr doesn't compile with clang + old boost

[BIND 10 Development]

#2147: boost::offset_ptr doesn't compile with clang + old boost
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |  UnAssigned
            Priority:  medium        |                       Status:  new
           Component:  build system  |                    Milestone:  Next-
           Sensitive:  0             |  Sprint-Proposed
         Sub-Project:  DNS           |                     Keywords:
Estimated Difficulty:  0             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 See this:
 http://git.bind10.isc.org/~tester/builder/BIND10/20120723120000-FreeBSD8-i386-Clang/logs/build.out

 From experiments offset_ptr in some older versions of boost causes
 this error on clang++.  Confirmed with boost 1.43 + clang  2.8 and
 boost 1.42 + clang 3.1, so it's more about the boost version and
 doesn't depend on the clang version.

 Maybe it's a minor case, but it's probably helpful to detect this in
 ./configure and tell the user to upgrade boost.  It should suffice to
 check it with AC_TRY_COMPILE() using this test code:

 {{{#!cpp
 #include <boost/interprocess/offset_ptr.hpp>
 }}}

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Ticket URL: <https://bind10.isc.org/ticket/2147>
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