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Annotation of gcc/gvarargs.h, revision 1.1

1.1     ! root        1: #ifndef __GNUC__
        !             2: /* Use the system's macros with the system's compiler.  */
        !             3: #include <varargs.h>
        !             4: #else
        !             5: /* Record that varargs.h is defined; this turns off stdarg.h.  */
        !             6: 
        !             7: #ifndef _VARARGS_H
        !             8: #define _VARARGS_H
        !             9: 
        !            10: #ifdef __sparc__
        !            11: #include "va-sparc.h"
        !            12: #else
        !            13: #ifdef __spur__
        !            14: #include "va-spur.h"
        !            15: #else
        !            16: #ifdef __mips__
        !            17: #include "va-mips.h"
        !            18: #else
        !            19: #ifdef __i860__
        !            20: #include "va-i860.h"
        !            21: #else
        !            22: #ifdef __pyr__
        !            23: #include "va-pyr.h"
        !            24: #else
        !            25: #ifdef __m88k__
        !            26: #include "va-m88k.h"
        !            27: #else
        !            28: #ifdef __hp9000s800__
        !            29: #include "va-hp800.h"
        !            30: #else
        !            31: 
        !            32: #ifdef __NeXT__
        !            33: 
        !            34: /* On Next, erase any vestiges of stdarg.h.  */
        !            35: 
        !            36: #undef va_alist
        !            37: #undef va_dcl
        !            38: #undef va_list
        !            39: #undef va_start
        !            40: #undef va_end
        !            41: #undef __va_rounded_size
        !            42: #undef va_arg
        !            43: #endif  /* __NeXT__ */
        !            44: 
        !            45: /* In GCC version 2, we want an ellipsis at the end of the declaration
        !            46:    of the argument list.  GCC version 1 can't parse it.  */
        !            47: 
        !            48: #if __GNUC__ > 1
        !            49: #define __va_ellipsis ...
        !            50: #else
        !            51: #define __va_ellipsis
        !            52: #endif
        !            53: 
        !            54: /* These macros implement traditional (non-ANSI) varargs
        !            55:    for GNU C.  */
        !            56: 
        !            57: #define va_alist  __builtin_va_alist
        !            58: /* The ... causes current_function_varargs to be set in cc1.  */
        !            59: #define va_dcl    int __builtin_va_alist; __va_ellipsis
        !            60: 
        !            61: #ifdef _HIDDEN_VA_LIST  /* On OSF1, this means varargs.h is "half-loaded".  */
        !            62: #undef _VA_LIST
        !            63: #endif
        !            64: 
        !            65: /* The macro _VA_LIST_ is the same thing used by this file in Ultrix.  */
        !            66: /* But in 4.3bsd-net2, _VA_LIST_ has another meaning.  So ignore it.  */
        !            67: #if !defined (_VA_LIST_) || defined (_ANSI_H)
        !            68: /* The macro _VA_LIST is used in SCO Unix 3.2.  */
        !            69: #ifndef _VA_LIST
        !            70: #ifndef _VA_LIST_
        !            71: #define _VA_LIST_
        !            72: #endif
        !            73: #define _VA_LIST
        !            74: /* Make this a macro rather than a typedef, so we can undef any other defn.  */
        !            75: #define va_list __va___list
        !            76: typedef char * __va___list;
        !            77: #endif /* _VA_LIST */
        !            78: #endif /* !defined (_VA_LIST_) || defined (_ANSI_H) */
        !            79: 
        !            80: /*  In 4.3bsd-net2, it is said we must #undef this.
        !            81:     I hope this successfully identifies that system.
        !            82:     I don't know why this works--rms.  */
        !            83: #ifdef _ANSI_H
        !            84: #undef _VA_LIST_
        !            85: #endif
        !            86: 
        !            87: #define va_start(AP)  AP=(char *) &__builtin_va_alist
        !            88: 
        !            89: #define va_end(AP)
        !            90: 
        !            91: #define __va_rounded_size(TYPE)  \
        !            92:   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
        !            93: 
        !            94: #define va_arg(AP, TYPE)                                               \
        !            95:  (AP += __va_rounded_size (TYPE),                                      \
        !            96:   *((TYPE *) (AP - __va_rounded_size (TYPE))))
        !            97: 
        !            98: #endif /* not hp800 */
        !            99: #endif /* not m88k */
        !           100: #endif /* not pyr */
        !           101: #endif /* not i860 */
        !           102: #endif /* not mips */
        !           103: #endif /* not spur */
        !           104: #endif /* not sparc */
        !           105: #endif /* not _VARARGS_H */
        !           106: #endif /* __GNUC__ */

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