1__isthreaded
2__p_class_syms
3__p_type_syms
4__progname
5__sF
6__stack_chk_guard
7__system_property_area__
8_ctype_
9_tolower_tab_
10_toupper_tab_
11environ
12optarg
13opterr
14optind
15optopt
16optreset
17sys_siglist
18tzname
19