_POSIX_SOURCE
#if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
#if !defined (emacs) && !defined (_POSIX_SOURCE)
!(defined _POSIX_SOURCE || defined _POSIX_C_SOURCE || \
!defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE && \
#if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \
#if defined _POSIX_SOURCE || _POSIX_C_SOURCE >= 1 || defined _XOPEN_SOURCE
#ifndef _POSIX_SOURCE
#ifndef _POSIX_SOURCE
#ifndef _POSIX_SOURCE
#ifndef _POSIX_SOURCE