argp_err_exit_status
argp_program_bug_address
argp_program_version
argp_program_version_hook
environ
getdate_err
h_errno
optarg
opterr
optind
optopt
program_invocation_name
re_syntax_options
sys_siglist
tz_dsttime
_IO_2_1_stderr_
_IO_2_1_stdin_
_IO_2_1_stdout_
_IO_stderr
_IO_stdin
_IO_stdout
_sys_siglist
__after_morecore_hook
__environ
__free_hook
__malloc_hook
__malloc_initialized
__malloc_initialize_hook
__memalign_hook
__morecore
__realloc_hook