{
environ;
__environ;

stdin;
stdout;
stderr;

timezone;
daylight;
tzname;
__timezone;
__daylight;
__tzname;

signgam;
__signgam;

optarg;
optind;
opterr;
optreset;
__optreset;

getdate_err;

h_errno;

program_invocation_name;
program_invocation_short_name;
__progname;
__progname_full;

__stack_chk_guard;
};