[OE-core] boost 1.56 compile fail

[Yi Qingliang]

hardware: samsung s3c6410

after updated to latest poky, the boost compile fail!

error info:
libs/atomic/src/lockpool.cpp:127:5: error: 'thread_fence' is not a member
of 'boost::atomics::detail'
libs/atomic/src/lockpool.cpp:138:5: error: 'signal_fence' is not a member
of 'boost::atomics::detail'


after dig into it, I found that:
the marco 'BOOST_ATOMIC_FLAG_LOCK_FREE' is 0, so it don't include
'operations_lockfree.hpp' which has 'thread_fence' and 'signal_fence', but
pthread.h at line 21.

in file 'caps_gcc_atomic.hpp', 'BOOST_ATOMIC_FLAG_LOCK_FREE' is set to '0',
the author think if '__GCC_ATOMIC_BOOL_LOCK_FREE' is 1, the atomic serial
function gcc provided is not lock free.

at the end of 'caps_gcc_atomic.hpp', it defined 'BOOST_ATOMIC_THREAD_FENCE'
as 2.

so the conflict is: *BOOST_ATOMIC_THREAD_FENCE* and
*BOOST_ATOMIC_FLAG_LOCK_FREE*

I don't know it is the new poky problem, or the boost problem, any idea?


Yi Qingliang
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