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由 Rich Felker 提交于
_POSIX_VDISABLE is only visible if unistd.h has already been included, so conditional use of it here makes no sense. the value is always 0 anyway; it does not vary.
e6093b5a
_POSIX_VDISABLE is only visible if unistd.h has already been included, so conditional use of it here makes no sense. the value is always 0 anyway; it does not vary.