__mempcpy
    accept4
    argz_add
    argz_add_sep
    argz_append
    argz_count
    argz_create
    argz_create_sep
    argz_delete
    argz_extract
    argz_insert
    argz_next
    argz_replace
    argz_stringify
    asnprintf
    asprintf
    asprintf_r
    basename			(see the section called “Implementation Notes”)
    canonicalize_file_name
    clearenv
    clog10
    clog10f
    clog10l
    close_range			(see the section called “Implementation Notes”)
    crypt_r			(available in external "crypt" library)
    dladdr			(see the section called “Implementation Notes”)
    dremf
    dup3
    envz_add
    envz_entry
    envz_get
    envz_merge
    envz_remove
    envz_strip
    error
    error_at_line
    euidaccess
    execvpe
    exp10
    exp10f
    exp10l
    fallocate			(see the section called “Implementation Notes”)
    fcloseall
    fcloseall_r
    fedisableexcept
    feenableexcept
    fegetexcept
    ffsl
    ffsll
    fgets_unlocked
    fgetwc_unlocked
    fgetws_unlocked
    fgetxattr
    flistxattr
    fopencookie
    fputs_unlocked
    fputwc_unlocked
    fputws_unlocked
    fremovexattr
    fsetxattr
    get_avphys_pages
    get_current_dir_name
    get_nprocs
    get_nprocs_conf
    get_phys_pages
    getmntent_r
    getopt_long
    getopt_long_only
    getpt
    getwc_unlocked
    getwchar_unlocked
    getxattr
    lgetxattr
    listxattr
    llistxattr
    lremovexattr
    lsetxattr
    memmem
    mempcpy
    memrchr
    mkostemp
    mkostemps
    pipe2
    posix_spawn_file_actions_addchdir_np
    posix_spawn_file_actions_addfchdir_np
    pow10
    pow10f
    pow10l
    ppoll
    pthread_cond_clockwait
    pthread_getaffinity_np
    pthread_getattr_np
    pthread_getname_np
    pthread_mutex_clocklock
    pthread_rwlock_clockrdlock
    pthread_rwlock_clockwrlock
    pthread_setaffinity_np
    pthread_setname_np
    pthread_sigqueue
    pthread_timedjoin_np
    pthread_tryjoin_np
    ptsname_r
    putwc_unlocked
    putwchar_unlocked
    renameat2			(see the section called “Implementation Notes”)
    qsort_r			(see the section called “Implementation Notes”)
    quotactl
    rawmemchr
    removexattr
    scandirat
    sched_getaffinity
    sched_getcpu
    sched_setaffinity
    secure_getenv
    sem_clockwait
    setxattr
    signalfd
    sincos
    sincosf
    sincosl
    strchrnul
    strptime_l
    strtod_l
    strtof_l
    strtol_l
    strtold_l
    strtoll_l
    strtoul_l
    strtoull_l
    strverscmp
    sysinfo
    tdestroy
    timerfd_create
    timerfd_gettime
    timerfd_settime
    timegm
    timelocal
    toascii_l
    updwtmpx
    utmpxname
    vasnprintf
    vasprintf
    vasprintf_r
    versionsort
    wcsftime_l
    wcstod_l
    wcstof_l
    wcstol_l
    wcstold_l
    wcstoll_l
    wcstoul_l
    wcstoull_l
    wmempcpy