#ifndef _OS_H
#define _OS_H
#ifdef SYS5
#undef SYS5
#endif
#ifdef SVR4
#undef SVR4
#endif
#ifdef __pyrsoft
#define _DCOSX_
#define _OS_ "DCOSX"
#define SYS5
#define SVR4
#else
#ifdef pyr
#define _OSX_
#define _OS_ "OSX"
#else
#ifdef _SEQUENT_
#define _PTX_
#define _OS_ "PTX"
#define SYS5
#else
#ifdef sequent
#define _DYNIX_
#define _OS_ "DYNIX"
#else
#ifdef sun
#if defined(_STDC_) || defined(__svr4__) || defined(__SVR4)
#define _SOLARIS_
#define SYS5
#define SVR4
#define _OS_ "SOLARIS"
#else
#define _SUNOS_
#define _OS_ "SUNOS"
#endif
#else
#ifdef hpux
#define _HPUX_
#define _OS_ "HPUX"
#define SYS5
#else
#ifdef ultrix
#define _ULTRIX_
#define _OS_ "ULTRIX"
#else
#ifdef _CX_UX
#define _CX_UX_
#define _OS_ "CXUX"
#define SYS5
#else
#if defined(unix) && defined(i860) /* stratus svr4 */
#define _FTX_
#define _OS_ "FTX"
#define SVR4
#define SYS5
#else
#if defined(unix) && defined(i386) /* ncr svr4 */
#define _NCR_
#define _OS_ "NCR"
#define SVR4
#define SYS5
#else
#if defined(__ncube__) /* nCUBE - for ncc */
#define _VERTEX_
#define _OS_ "VERTEX"
#define SYS5
#else
#if defined(unix) && defined(SVR3) /* ncube sgi */
#define _IRIX_
#define _OS_ "IRIX"
#else
#define _OS_ "UNKNOWN"
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif /* _OS_H */