is_lock_free not defined in std::atomic in gcc 4.7.2?

is_lock_free not defined in std::atomic<T> in gcc 4.7.2?

References

Reference NO 1

http://stackoverflow.com/questions/15204060/is-lock-free-not-defined-in-stdatomict-in-gcc-4-7-2

Reference NO 2

http://stackoverflow.com/questions/16132176/problems-with-stdstoi-not-working-on-mingw-gcc-4-7-2

Reference NO 3

http://www.blogosfera.co.uk/2013/03/is_lock_free-not-defined-in-stdatomict-in-gcc-4-7-2/

Reference NO 4

http://gcc.gnu.org/gcc-4.7/changes.html

Reference NO 5

http://www.pressingquestion.com/1289990/Whats-The-Difference-In-Gcc-Between--std%3Dgnu%2B%2B0x-And--std%3Dc%2B%2B0x-And-Which-One-Should-Be-Used%3F

Reference NO 6

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Reference NO 7

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Reference NO 8

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