#ifndef _STDARG_H#define _STDARG_H #ifdef __x86_64__#include <stdlib.h> /* GCC compatible definition of va_list. */struct __va_list_struct {    unsigned int gp_offset;    unsigned int fp_offset;    union {        unsigned int overflow_offset;        char *overflow_arg_area;    };    char *reg_save_area;}; typedef struct __va_list_struct *va_list; /* we use __builtin_(malloc|free) to avoid #define malloc tcc_malloc *//* XXX: this lacks the support of aggregated types. */#define va_start(ap, last)                                              \    (ap = (va_list)__builtin_malloc(sizeof(struct __va_list_struct)),   \     *ap = *(struct __va_list_struct*)(                                 \         (char*)__builtin_frame_address(0) - 16),                       \     ap->overflow_arg_area = ((char *)__builtin_frame_address(0) +      \                              ap->overflow_offset),                     \     ap->reg_save_area = (char *)__builtin_frame_address(0) - 176 - 16  \        )#define va_arg(ap, type)                                        \    (*(type*)(__builtin_types_compatible_p(type, long double)   \              ? (ap->overflow_arg_area += 16,                   \                 ap->overflow_arg_area - 16)                    \              : __builtin_types_compatible_p(type, double)      \              ? (ap->fp_offset < 128 + 48                       \                 ? (ap->fp_offset += 16,                        \                    ap->reg_save_area + ap->fp_offset - 16)     \                 : (ap->overflow_arg_area += 8,                 \                    ap->overflow_arg_area - 8))                 \              : (ap->gp_offset < 48                             \                 ? (ap->gp_offset += 8,                         \                    ap->reg_save_area + ap->gp_offset - 8)      \                 : (ap->overflow_arg_area += 8,                 \                    ap->overflow_arg_area - 8))                 \        ))#define va_copy(dest, src)                                      \    ((dest) = (va_list)malloc(sizeof(struct __va_list_struct)), \     *(dest) = *(src))#define va_end(ap) __builtin_free(ap) #else typedef char *va_list; /* only correct for i386 */#define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)#define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))#define va_copy(dest, src) (dest) = (src)#define va_end(ap) #endif /* fix a buggy dependency on GCC in libio.h */typedef va_list __gnuc_va_list;#define _VA_LIST_DEFINED #endif /* _STDARG_H */