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#ifndef _FEATURES_H
#define _FEATURES_H
#if defined(_ALL_SOURCE) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE 1
#endif
#if defined(_DEFAULT_SOURCE) && !defined(_BSD_SOURCE)
#define _BSD_SOURCE 1
#endif
#if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) \
&& !defined(_XOPEN_SOURCE) && !defined(_GNU_SOURCE) \
&& !defined(_BSD_SOURCE) && !defined(__STRICT_ANSI__)
#define _BSD_SOURCE 1
#define _XOPEN_SOURCE 700
#endif
#if __STDC_VERSION__ >= 199901L
#define __restrict restrict
#elif !defined(__GNUC__)
#define __restrict
#endif
#if __STDC_VERSION__ >= 199901L || defined(__cplusplus)
#define __inline inline
#endif
#if __STDC_VERSION__ >= 201112L
#elif defined(__GNUC__)
#define _Noreturn __attribute__((__noreturn__))
#else
#define _Noreturn
#endif
#endif
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