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fcntl.2: Note feature test macro requirements for F_DUPFD_CLOEXEC
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -1151,6 +1151,11 @@ are specified in POSIX.1-2001.
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.B F_DUPFD_CLOEXEC
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is specified in POSIX.1-2008.
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(To get this definition, define
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.B _POSIX_C_SOURCE
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with the value 200809L or greater, or
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.B _XOPEN_SOURCE
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with the value 700 or greater.)
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.BR F_GETOWN_EX ,
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.BR F_SETOWN_EX ,
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