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O_CLOEXEC is introduced from Linux 2.6.23, so old kernel doesn't have it, we need check before use. This patch is much more like a workaround, since it may need fcntl() use FD_CLOEXEC to replace. (From OE-Core rev: 44c441222002ee0177100be0431adf91984e90d5) Signed-off-by: Ting Liu <b28495@freescale.com> Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>