text: #ifndef _SYS_UNISTD_H
  #define _SYS_UNISTD_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <_ansi.h>
  #include <sys/types.h>
  #include <sys/_types.h>
  #define __need_size_t
  #define __need_ptrdiff_t
  #include <stddef.h>
  
  extern char **environ;
  
  void	_EXFUN(_exit, (int __status )); /* _ATTRIBUTE ((noreturn))); */
  
  int	_EXFUN(access,(const char *__path, int __amode ));
  unsigned  _EXFUN(alarm, (unsigned __secs ));
  int     _EXFUN(chdir, (const char *__path ));
  int     _EXFUN(chmod, (const char *__path, mode_t __mode ));
  #if !defined(__INSIDE_CYGWIN__)
  int     _EXFUN(chown, (const char *__path, uid_t __owner, gid_t __group ));
  #endif
  #if defined(__CYGWIN__) || defined(__rtems__)
  int     _EXFUN(chroot, (const char *__path ));
  #endif
  int     _EXFUN(close, (int __fildes ));
  #if 1 /* XXX Emscripten defined(__CYGWIN__) */
  size_t	_EXFUN(confstr, (int __name, char *__buf, size_t __len));
  #endif
  char *  _EXFUN(ctermid, (char *__s ));
  char *  _EXFUN(cuserid, (char *__s ));
  #if defined(__CYGWIN__)
  int	_EXFUN(daemon, (int nochdir, int noclose));
  #endif
  int     _EXFUN(dup, (int __fildes ));
  int     _EXFUN(dup2, (int __fildes, int __fildes2 ));
  #if defined(__CYGWIN__)
  int     _EXFUN(dup3, (int __fildes, int __fildes2, int flags));
  int	_EXFUN(eaccess, (const char *__path, int __mode));
  void	_EXFUN(endusershell, (void));
  int	_EXFUN(euidaccess, (const char *__path, int __mode));
  #endif
  int     _EXFUN(execl, (const char *__path, const char *, ... ));
  int     _EXFUN(execle, (const char *__path, const char *, ... ));
  int     _EXFUN(execlp, (const char *__file, const char *, ... ));
  int     _EXFUN(execv, (const char *__path, char * const __argv[] ));
  int     _EXFUN(execve, (const char *__path, char * const __argv[], char * const __envp[] ));
  int     _EXFUN(execvp, (const char *__file, char * const __argv[] ));
  #if defined(__CYGWIN__)
  int     _EXFUN(execvpe, (const char *__file, char * const __argv[], char * const __envp[] ));
  int	_EXFUN(faccessat, (int __dirfd, const char *__path, int __mode, int __flags));
  #endif
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__) || defined(__SPU__)
  int     _EXFUN(fchdir, (int __fildes));
  #endif
  int     _EXFUN(fchmod, (int __fildes, mode_t __mode ));
  #if !defined(__INSIDE_CYGWIN__)
  int     _EXFUN(fchown, (int __fildes, uid_t __owner, gid_t __group ));
  #endif
  #if defined(__CYGWIN__)
  int	_EXFUN(fchownat, (int __dirfd, const char *__path, uid_t __owner, gid_t __group, int __flags));
  int	_EXFUN(fexecve, (int __fd, char * const __argv[], char * const __envp[] ));
  #endif
  pid_t   _EXFUN(fork, (void ));
  long    _EXFUN(fpathconf, (int __fd, int __name ));
  int     _EXFUN(fsync, (int __fd));
  int     _EXFUN(fdatasync, (int __fd));
  char *  _EXFUN(getcwd, (char *__buf, size_t __size ));
  #if defined(__CYGWIN__)
  int	_EXFUN(getdomainname ,(char *__name, size_t __len));
  #endif
  #if !defined(__INSIDE_CYGWIN__)
  gid_t   _EXFUN(getegid, (void ));
  uid_t   _EXFUN(geteuid, (void ));
  gid_t   _EXFUN(getgid, (void ));
  #endif
  int     _EXFUN(getgroups, (int __gidsetsize, gid_t __grouplist[] ));
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__)
  long    _EXFUN(gethostid, (void));
  #endif
  char *  _EXFUN(getlogin, (void ));
  #if defined(EMSCRIPTEN) || defined(_POSIX_THREAD_SAFE_FUNCTIONS)
  int _EXFUN(getlogin_r, (char *name, size_t namesize) );
  #endif
  char *  _EXFUN(getpass, (const char *__prompt));
  int	_EXFUN(getpagesize, (void));
  #if defined(__CYGWIN__)
  int    _EXFUN(getpeereid, (int, uid_t *, gid_t *));
  #endif
  pid_t   _EXFUN(getpgid, (pid_t));
  pid_t   _EXFUN(getpgrp, (void ));
  pid_t   _EXFUN(getpid, (void ));
  pid_t   _EXFUN(getppid, (void ));
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__)
  pid_t   _EXFUN(getsid, (pid_t));
  #endif
  #if defined(EMSCRIPTEN) || !defined(__INSIDE_CYGWIN__)
  uid_t   _EXFUN(getuid, (void ));
  #endif
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__)
  char *	_EXFUN(getusershell, (void));
  char *  _EXFUN(getwd, (char *__buf ));
  int	_EXFUN(iruserok, (unsigned long raddr, int superuser, const char *ruser, const char *luser));
  #endif
  int     _EXFUN(isatty, (int __fildes ));
  #if !defined(__INSIDE_CYGWIN__)
  int     _EXFUN(lchown, (const char *__path, uid_t __owner, gid_t __group ));
  #endif
  int     _EXFUN(link, (const char *__path1, const char *__path2 ));
  #if defined(__CYGWIN__)
  int     _EXFUN(linkat, (int __dirfd1, const char *__path1, int __dirfd2, const char *__path2, int __flags ));
  #endif
  int	_EXFUN(nice, (int __nice_value ));
  #if !defined(__INSIDE_CYGWIN__)
  off_t   _EXFUN(lseek, (int __fildes, off_t __offset, int __whence ));
  #endif
  #if defined(EMSCRIPTEN) || defined(__SPU__) || defined(__CYGWIN__)
  #define F_ULOCK	0
  #define F_LOCK	1
  #define F_TLOCK	2
  #define F_TEST	3
  int     _EXFUN(lockf, (int __fd, int __cmd, off_t __len));
  #endif
  long    _EXFUN(pathconf, (const char *__path, int __name ));
  int     _EXFUN(pause, (void ));
  #ifdef __CYGWIN__
  int	_EXFUN(pthread_atfork, (void (*)(void), void (*)(void), void (*)(void)));
  #endif
  int     _EXFUN(pipe, (int __fildes[2] ));
  #ifdef __CYGWIN__
  int     _EXFUN(pipe2, (int __fildes[2], int flags));
  #endif
  ssize_t _EXFUN(pread, (int __fd, void *__buf, size_t __nbytes, off_t __offset));
  ssize_t _EXFUN(pwrite, (int __fd, const void *__buf, size_t __nbytes, off_t __offset));
  _READ_WRITE_RETURN_TYPE _EXFUN(read, (int __fd, void *__buf, size_t __nbyte ));
  #if defined(__CYGWIN__)
  int	_EXFUN(rresvport, (int *__alport));
  int	_EXFUN(revoke, (char *__path));
  #endif
  int     _EXFUN(rmdir, (const char *__path ));
  #if defined(__CYGWIN__)
  int	_EXFUN(ruserok, (const char *rhost, int superuser, const char *ruser, const char *luser));
  #endif
  void *  _EXFUN(sbrk,  (ptrdiff_t __incr));
  #if !defined(__INSIDE_CYGWIN__)
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__)
  int     _EXFUN(setegid, (gid_t __gid ));
  int     _EXFUN(seteuid, (uid_t __uid ));
  #endif
  int     _EXFUN(setgid, (gid_t __gid ));
  #endif
  #if defined(__CYGWIN__)
  int	_EXFUN(setgroups, (int ngroups, const gid_t *grouplist ));
  #endif
  int     _EXFUN(setpgid, (pid_t __pid, pid_t __pgid ));
  int     _EXFUN(setpgrp, (void ));
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) && !defined(__INSIDE_CYGWIN__)
  int	_EXFUN(setregid, (gid_t __rgid, gid_t __egid));
  int	_EXFUN(setreuid, (uid_t __ruid, uid_t __euid));
  #endif
  pid_t   _EXFUN(setsid, (void ));
  #if !defined(__INSIDE_CYGWIN__)
  int     _EXFUN(setuid, (uid_t __uid ));
  #endif
  #if defined(__CYGWIN__)
  void	_EXFUN(setusershell, (void));
  #endif
  unsigned _EXFUN(sleep, (unsigned int __seconds ));
  void    _EXFUN(swab, (const void *, void *, ssize_t));
  long    _EXFUN(sysconf, (int __name ));
  pid_t   _EXFUN(tcgetpgrp, (int __fildes ));
  int     _EXFUN(tcsetpgrp, (int __fildes, pid_t __pgrp_id ));
  char *  _EXFUN(ttyname, (int __fildes ));
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__)
  int     _EXFUN(ttyname_r, (int, char *, size_t)); 
  #endif
  int     _EXFUN(unlink, (const char *__path ));
  int 	_EXFUN(usleep, (useconds_t __useconds));
  int     _EXFUN(vhangup, (void ));
  _READ_WRITE_RETURN_TYPE _EXFUN(write, (int __fd, const void *__buf, size_t __nbyte ));
  
  #ifdef __CYGWIN__
  # define __UNISTD_GETOPT__
  # include <getopt.h>
  # undef __UNISTD_GETOPT__
  #else
  extern char *optarg;			/* getopt(3) external variables */
  extern int optind, opterr, optopt;
  int	 getopt(int, char * const [], const char *);
  extern int optreset;			/* getopt(3) external variable */
  #endif
  
  #ifndef        _POSIX_SOURCE
  pid_t   _EXFUN(vfork, (void ));
  #endif /* _POSIX_SOURCE */
  
  #ifdef _COMPILING_NEWLIB
  /* Provide prototypes for most of the _<systemcall> names that are
     provided in newlib for some compilers.  */
  int     _EXFUN(_close, (int __fildes ));
  pid_t   _EXFUN(_fork, (void ));
  pid_t   _EXFUN(_getpid, (void ));
  int	_EXFUN(_isatty, (int __fildes ));
  int     _EXFUN(_link, (const char *__path1, const char *__path2 ));
  _off_t   _EXFUN(_lseek, (int __fildes, _off_t __offset, int __whence ));
  #ifdef __LARGE64_FILES
  _off64_t _EXFUN(_lseek64, (int __filedes, _off64_t __offset, int __whence ));
  #endif
  _READ_WRITE_RETURN_TYPE _EXFUN(_read, (int __fd, void *__buf, size_t __nbyte ));
  void *  _EXFUN(_sbrk,  (ptrdiff_t __incr));
  int     _EXFUN(_unlink, (const char *__path ));
  _READ_WRITE_RETURN_TYPE _EXFUN(_write, (int __fd, const void *__buf, size_t __nbyte ));
  int     _EXFUN(_execve, (const char *__path, char * const __argv[], char * const __envp[] ));
  #endif
  
  #if defined(__CYGWIN__) || defined(__rtems__) || defined(__sh__) || defined(__SPU__) || defined(EMSCRIPTEN)
  #if !defined(__INSIDE_CYGWIN__)
  int     _EXFUN(ftruncate, (int __fd, off_t __length));
  int     _EXFUN(truncate, (const char *, off_t __length));
  #endif
  #endif
  
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__)
  int	_EXFUN(getdtablesize, (void));
  int	_EXFUN(setdtablesize, (int));
  useconds_t _EXFUN(ualarm, (useconds_t __useconds, useconds_t __interval));
  #if !(defined  (_WINSOCK_H) || defined (__USE_W32_SOCKETS))
  /* winsock[2].h defines as __stdcall, and with int as 2nd arg */
   int	_EXFUN(gethostname, (char *__name, size_t __len));
  #endif
  char *	_EXFUN(mktemp, (char *));
  #endif
  
  #if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__SPU__) || defined(__rtems__)
  void    _EXFUN(sync, (void));
  #endif
  
  ssize_t _EXFUN(readlink, (const char *__path, char *__buf, size_t __buflen));
  #if defined(__CYGWIN__)
  ssize_t	_EXFUN(readlinkat, (int __dirfd1, const char *__path, char *__buf, size_t __buflen));
  #endif
  int     _EXFUN(symlink, (const char *__name1, const char *__name2));
  #if defined(__CYGWIN__)
  int	_EXFUN(symlinkat, (const char *, int, const char *));
  int	_EXFUN(unlinkat, (int, const char *, int));
  #endif
  
  #define	F_OK	0
  #define	R_OK	4
  #define	W_OK	2
  #define	X_OK	1
  
  # define	SEEK_SET	0
  # define	SEEK_CUR	1
  # define	SEEK_END	2
  
  #include <sys/features.h>
  
  #define STDIN_FILENO    0       /* standard input file descriptor */
  #define STDOUT_FILENO   1       /* standard output file descriptor */
  #define STDERR_FILENO   2       /* standard error file descriptor */
  
  /*
   *  sysconf values per IEEE Std 1003.1, 2008 Edition
   */
  
  #define _SC_ARG_MAX                       0
  #define _SC_CHILD_MAX                     1
  #define _SC_CLK_TCK                       2
  #define _SC_NGROUPS_MAX                   3
  #define _SC_OPEN_MAX                      4
  #define _SC_JOB_CONTROL                   5
  #define _SC_SAVED_IDS                     6
  #define _SC_VERSION                       7
  #define _SC_PAGESIZE                      8
  #define _SC_PAGE_SIZE                     _SC_PAGESIZE
  /* These are non-POSIX values we accidentally introduced in 2000 without
     guarding them.  Keeping them unguarded for backward compatibility. */
  #define _SC_NPROCESSORS_CONF              9
  #define _SC_NPROCESSORS_ONLN             10
  #define _SC_PHYS_PAGES                   11
  #define _SC_AVPHYS_PAGES                 12
  /* End of non-POSIX values. */
  #define _SC_MQ_OPEN_MAX                  13
  #define _SC_MQ_PRIO_MAX                  14
  #define _SC_RTSIG_MAX                    15
  #define _SC_SEM_NSEMS_MAX                16
  #define _SC_SEM_VALUE_MAX                17
  #define _SC_SIGQUEUE_MAX                 18
  #define _SC_TIMER_MAX                    19
  #define _SC_TZNAME_MAX                   20
  #define _SC_ASYNCHRONOUS_IO              21
  #define _SC_FSYNC                        22
  #define _SC_MAPPED_FILES                 23
  #define _SC_MEMLOCK                      24
  #define _SC_MEMLOCK_RANGE                25
  #define _SC_MEMORY_PROTECTION            26
  #define _SC_MESSAGE_PASSING              27
  #define _SC_PRIORITIZED_IO               28
  #define _SC_REALTIME_SIGNALS             29
  #define _SC_SEMAPHORES                   30
  #define _SC_SHARED_MEMORY_OBJECTS       199 /* XXX Emscripten changed 31 to 199 */
  #define _SC_SYNCHRONIZED_IO              32
  #define _SC_TIMERS                       33
  #define _SC_AIO_LISTIO_MAX               34
  #define _SC_AIO_MAX                      35
  #define _SC_AIO_PRIO_DELTA_MAX           36
  #define _SC_DELAYTIMER_MAX               37
  #define _SC_THREAD_KEYS_MAX              38
  #define _SC_THREAD_STACK_MIN             39
  #define _SC_THREAD_THREADS_MAX           40
  #define _SC_TTY_NAME_MAX                 41
  #define _SC_THREADS                      42
  #define _SC_THREAD_ATTR_STACKADDR        43
  #define _SC_THREAD_ATTR_STACKSIZE        44
  #define _SC_THREAD_PRIORITY_SCHEDULING   45
  #define _SC_THREAD_PRIO_INHERIT          46
  /* _SC_THREAD_PRIO_PROTECT was _SC_THREAD_PRIO_CEILING in early drafts */
  #define _SC_THREAD_PRIO_PROTECT          47
  #define _SC_THREAD_PRIO_CEILING          _SC_THREAD_PRIO_PROTECT
  #define _SC_THREAD_PROCESS_SHARED        48
  #define _SC_THREAD_SAFE_FUNCTIONS        49
  #define _SC_GETGR_R_SIZE_MAX             50
  #define _SC_GETPW_R_SIZE_MAX             51
  #define _SC_LOGIN_NAME_MAX               52
  #define _SC_THREAD_DESTRUCTOR_ITERATIONS 53
  #define _SC_ADVISORY_INFO                54
  #define _SC_ATEXIT_MAX                   55
  #define _SC_BARRIERS                     56
  #define _SC_BC_BASE_MAX                  57
  #define _SC_BC_DIM_MAX                   58
  #define _SC_BC_SCALE_MAX                 59
  #define _SC_BC_STRING_MAX                60
  #define _SC_CLOCK_SELECTION              61
  #define _SC_COLL_WEIGHTS_MAX             62
  #define _SC_CPUTIME                      63
  #define _SC_EXPR_NEST_MAX                64
  #define _SC_HOST_NAME_MAX                65
  #define _SC_IOV_MAX                      66
  #define _SC_IPV6                         67
  #define _SC_LINE_MAX                     68
  #define _SC_MONOTONIC_CLOCK              69
  #define _SC_RAW_SOCKETS                  70
  #define _SC_READER_WRITER_LOCKS          71
  #define _SC_REGEXP                       72
  #define _SC_RE_DUP_MAX                   73
  #define _SC_SHELL                        74
  #define _SC_SPAWN                        75
  #define _SC_SPIN_LOCKS                   76
  #define _SC_SPORADIC_SERVER              77
  #define _SC_SS_REPL_MAX                  78
  #define _SC_SYMLOOP_MAX                  79
  #define _SC_THREAD_CPUTIME               80
  #define _SC_THREAD_SPORADIC_SERVER       81
  #define _SC_TIMEOUTS                     82
  #define _SC_TRACE                        83
  #define _SC_TRACE_EVENT_FILTER           84
  #define _SC_TRACE_EVENT_NAME_MAX         85
  #define _SC_TRACE_INHERIT                86
  #define _SC_TRACE_LOG                    87
  #define _SC_TRACE_NAME_MAX               88
  #define _SC_TRACE_SYS_MAX                89
  #define _SC_TRACE_USER_EVENT_MAX         90
  #define _SC_TYPED_MEMORY_OBJECTS         91
  #define _SC_V7_ILP32_OFF32               92
  #define _SC_V6_ILP32_OFF32               _SC_V7_ILP32_OFF32
  #define _SC_XBS5_ILP32_OFF32             _SC_V7_ILP32_OFF32
  #define _SC_V7_ILP32_OFFBIG              93
  #define _SC_V6_ILP32_OFFBIG              _SC_V7_ILP32_OFFBIG
  #define _SC_XBS5_ILP32_OFFBIG            _SC_V7_ILP32_OFFBIG
  #define _SC_V7_LP64_OFF64                94
  #define _SC_V6_LP64_OFF64                _SC_V7_LP64_OFF64
  #define _SC_XBS5_LP64_OFF64              _SC_V7_LP64_OFF64
  #define _SC_V7_LPBIG_OFFBIG              95
  #define _SC_V6_LPBIG_OFFBIG              _SC_V7_LPBIG_OFFBIG
  #define _SC_XBS5_LPBIG_OFFBIG            _SC_V7_LPBIG_OFFBIG
  #define _SC_XOPEN_CRYPT                  96
  #define _SC_XOPEN_ENH_I18N               97
  #define _SC_XOPEN_LEGACY                 98
  #define _SC_XOPEN_REALTIME               99
  #define _SC_STREAM_MAX                  100
  #define _SC_PRIORITY_SCHEDULING         101
  #define _SC_XOPEN_REALTIME_THREADS      102
  #define _SC_XOPEN_SHM                   103
  #define _SC_XOPEN_STREAMS               104
  #define _SC_XOPEN_UNIX                  105
  #define _SC_XOPEN_VERSION               106
  #define _SC_2_CHAR_TERM                 107
  #define _SC_2_C_BIND                    108
  #define _SC_2_C_DEV                     109
  #define _SC_2_FORT_DEV                  110
  #define _SC_2_FORT_RUN                  111
  #define _SC_2_LOCALEDEF                 112
  #define _SC_2_PBS                       113
  #define _SC_2_PBS_ACCOUNTING            114
  #define _SC_2_PBS_CHECKPOINT            115
  #define _SC_2_PBS_LOCATE                116
  #define _SC_2_PBS_MESSAGE               117
  #define _SC_2_PBS_TRACK                 118
  #define _SC_2_SW_DEV                    119
  #define _SC_2_UPE                       120
  #define _SC_2_VERSION                   121
  #define _SC_THREAD_ROBUST_PRIO_INHERIT  122
  #define _SC_THREAD_ROBUST_PRIO_PROTECT  123
  #define _SC_XOPEN_UUCP                  124
  
  /*
   *  pathconf values per IEEE Std 1003.1, 2008 Edition
   */
  
  #define _PC_LINK_MAX                      0
  #define _PC_MAX_CANON                     1
  #define _PC_MAX_INPUT                     2
  #define _PC_NAME_MAX                      3
  #define _PC_PATH_MAX                      4
  #define _PC_PIPE_BUF                      5
  #define _PC_CHOWN_RESTRICTED              6
  #define _PC_NO_TRUNC                      7
  #define _PC_VDISABLE                      8
  #define _PC_ASYNC_IO                      9
  #define _PC_PRIO_IO                      10
  #define _PC_SYNC_IO                      11
  #define _PC_FILESIZEBITS                 12
  #define _PC_2_SYMLINKS                   13
  #define _PC_SYMLINK_MAX                  14
  #define _PC_ALLOC_SIZE_MIN               15
  #define _PC_REC_INCR_XFER_SIZE           16
  #define _PC_REC_MAX_XFER_SIZE            17
  #define _PC_REC_MIN_XFER_SIZE            18
  #define _PC_REC_XFER_ALIGN               19
  #define _PC_TIMESTAMP_RESOLUTION         20
  #ifdef __CYGWIN__
  /* Ask for POSIX permission bits support. */
  #define _PC_POSIX_PERMISSIONS            90
  /* Ask for full POSIX permission support including uid/gid settings. */
  #define _PC_POSIX_SECURITY               91
  #endif
  /* XXX Emscripten */
  #define _PC_SOCK_MAXBUF                 100
  
  /*
   *  confstr values per IEEE Std 1003.1, 2004 Edition
   */
  
  #if 1 /* XXX Emscripten: Enable these def __CYGWIN__	/ * Only defined on Cygwin for now. */
  #define _CS_PATH                               0
  #define _CS_POSIX_V7_ILP32_OFF32_CFLAGS        1
  #define _CS_POSIX_V6_ILP32_OFF32_CFLAGS       _CS_POSIX_V7_ILP32_OFF32_CFLAGS
  #define _CS_XBS5_ILP32_OFF32_CFLAGS           _CS_POSIX_V7_ILP32_OFF32_CFLAGS
  #define _CS_POSIX_V7_ILP32_OFF32_LDFLAGS       2
  #define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS      _CS_POSIX_V7_ILP32_OFF32_LDFLAGS
  #define _CS_XBS5_ILP32_OFF32_LDFLAGS          _CS_POSIX_V7_ILP32_OFF32_LDFLAGS
  #define _CS_POSIX_V7_ILP32_OFF32_LIBS          3
  #define _CS_POSIX_V6_ILP32_OFF32_LIBS         _CS_POSIX_V7_ILP32_OFF32_LIBS
  #define _CS_XBS5_ILP32_OFF32_LIBS             _CS_POSIX_V7_ILP32_OFF32_LIBS
  #define _CS_XBS5_ILP32_OFF32_LINTFLAGS         4
  #define _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS       5
  #define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS      _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS
  #define _CS_XBS5_ILP32_OFFBIG_CFLAGS          _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS
  #define _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS      6
  #define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS     _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS
  #define _CS_XBS5_ILP32_OFFBIG_LDFLAGS         _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS
  #define _CS_POSIX_V7_ILP32_OFFBIG_LIBS         7
  #define _CS_POSIX_V6_ILP32_OFFBIG_LIBS        _CS_POSIX_V7_ILP32_OFFBIG_LIBS
  #define _CS_XBS5_ILP32_OFFBIG_LIBS            _CS_POSIX_V7_ILP32_OFFBIG_LIBS
  #define _CS_XBS5_ILP32_OFFBIG_LINTFLAGS        8
  #define _CS_POSIX_V7_LP64_OFF64_CFLAGS         9
  #define _CS_POSIX_V6_LP64_OFF64_CFLAGS        _CS_POSIX_V7_LP64_OFF64_CFLAGS
  #define _CS_XBS5_LP64_OFF64_CFLAGS            _CS_POSIX_V7_LP64_OFF64_CFLAGS
  #define _CS_POSIX_V7_LP64_OFF64_LDFLAGS       10
  #define _CS_POSIX_V6_LP64_OFF64_LDFLAGS       _CS_POSIX_V7_LP64_OFF64_LDFLAGS
  #define _CS_XBS5_LP64_OFF64_LDFLAGS           _CS_POSIX_V7_LP64_OFF64_LDFLAGS
  #define _CS_POSIX_V7_LP64_OFF64_LIBS          11
  #define _CS_POSIX_V6_LP64_OFF64_LIBS          _CS_POSIX_V7_LP64_OFF64_LIBS
  #define _CS_XBS5_LP64_OFF64_LIBS              _CS_POSIX_V7_LP64_OFF64_LIBS
  #define _CS_XBS5_LP64_OFF64_LINTFLAGS         12
  #define _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS      13
  #define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS      _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS
  #define _CS_XBS5_LPBIG_OFFBIG_CFLAGS          _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS
  #define _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS     14
  #define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS     _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS
  #define _CS_XBS5_LPBIG_OFFBIG_LDFLAGS         _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS
  #define _CS_POSIX_V7_LPBIG_OFFBIG_LIBS        15
  #define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS        _CS_POSIX_V7_LPBIG_OFFBIG_LIBS
  #define _CS_XBS5_LPBIG_OFFBIG_LIBS            _CS_POSIX_V7_LPBIG_OFFBIG_LIBS
  #define _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS       16
  #define _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS    17
  #define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS    _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS
  #define _CS_POSIX_V7_THREADS_CFLAGS           18
  #define _CS_POSIX_V7_THREADS_LDFLAGS          19
  #define _CS_V7_ENV                            20
  
  /* XXX Emscripten: remove self-ref, and add two additional ones */
  /* #define _CS_V6_ENV                           _CS_V6_ENV */
  #define _CS_GNU_LIBC_VERSION                  42
  #define _CS_GNU_LIBPTHREAD_VERSION            43
  char *crypt(const char *key, const char *salt);
  void encrypt(char block[64], int edflag);
  
  #endif
  
  #ifndef __CYGWIN__
  # define	MAXPATHLEN	1024
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  #endif /* _SYS_UNISTD_H */
  