/* ------------------------------------------------------------- *//* support for tcc_run() */ #ifdef __leading_underscore# define _(s) s#else# define _(s) _##s#endif #ifndef _WIN32extern void (*_(_init_array_start)[]) (int argc, char **argv, char **envp);extern void (*_(_init_array_end)[]) (int argc, char **argv, char **envp);static void run_ctors(int argc, char **argv, char **env){    int i = 0;    while (&_(_init_array_start)[i] != _(_init_array_end))        (*_(_init_array_start)[i++])(argc, argv, env);}#endif extern void (*_(_fini_array_start)[]) (void);extern void (*_(_fini_array_end)[]) (void);static void run_dtors(void){    int i = 0;    while (&_(_fini_array_end)[i] != _(_fini_array_start))        (*_(_fini_array_end)[--i])();} static void *rt_exitfunc[32];static void *rt_exitarg[32];static int __rt_nr_exit; void __run_on_exit(int ret){    int n = __rt_nr_exit;    while (n)	--n, ((void(*)(int,void*))rt_exitfunc[n])(ret, rt_exitarg[n]);} int on_exit(void *function, void *arg){    int n = __rt_nr_exit;    if (n < 32) {	rt_exitfunc[n] = function;	rt_exitarg[n] = arg;        __rt_nr_exit = n + 1;        return 0;    }    return 1;} int atexit(void (*function)(void)){    return on_exit(function, 0);} typedef struct rt_frame {    void *ip, *fp, *sp;} rt_frame; __attribute__((noreturn)) void __rt_exit(rt_frame *, int); void exit(int code){    rt_frame f;    run_dtors();    __run_on_exit(code);    f.fp = 0;    f.ip = exit;    __rt_exit(&f, code);} #ifndef _WIN32int main(int, char**, char**); int _runmain(int argc, char **argv, char **envp){    int ret;    run_ctors(argc, argv, envp);    ret = main(argc, argv, envp);    run_dtors();    __run_on_exit(ret);    return ret;}#endif