libc {
  GLIBC_2.0 {
    # global variables
    _IO_list_all; _IO_stderr_; _IO_stdin_; _IO_stdout_;

    # functions used in inline functions or macros
    __getdelim;

    # functions used in inline functions or macros
    _IO_getc; _IO_peekc_unlocked; _IO_putc; _IO_feof; _IO_ferror;
    __uflow; __underflow; __overflow;

    # functions used in other libraries
    __vsscanf; __vsnprintf;

    # libio
    _IO_adjust_column; _IO_clearerr; _IO_default_doallocate;
    _IO_default_finish; _IO_default_pbackfail; _IO_default_uflow;
    _IO_default_xsgetn; _IO_default_xsputn; _IO_do_write;
    _IO_doallocbuf; _IO_fclose; _IO_fdopen; _IO_feof; _IO_ferror;
    _IO_fflush; _IO_fgetc; _IO_fgetpos; _IO_fgets; _IO_file_attach;
    _IO_file_close; _IO_file_close_it; _IO_file_doallocate;
    _IO_file_fopen; _IO_file_init; _IO_file_jumps; _IO_file_open;
    _IO_file_overflow; _IO_file_read; _IO_file_seek; _IO_file_seekoff;
    _IO_file_setbuf; _IO_file_stat; _IO_file_sync; _IO_file_underflow;
    _IO_file_write; _IO_file_xsputn; _IO_fileno; _IO_flockfile;
    _IO_flush_all; _IO_flush_all_linebuffered; _IO_fopen; _IO_fprintf;
    _IO_fputs; _IO_fread; _IO_free_backup_area; _IO_freopen;
    _IO_fscanf; _IO_fseek; _IO_fsetpos; _IO_ftell; _IO_ftrylockfile;
    _IO_funlockfile; _IO_fwrite; _IO_getc; _IO_getline; _IO_gets;
    _IO_init; _IO_init_marker; _IO_link_in; _IO_marker_delta;
    _IO_marker_difference; _IO_padn; _IO_pclose; _IO_peekc_locked;
    _IO_perror; _IO_popen; _IO_printf; _IO_proc_close; _IO_proc_open;
    _IO_putc; _IO_puts; _IO_remove_marker; _IO_rewind; _IO_scanf;
    _IO_seekmark; _IO_seekoff; _IO_seekpos; _IO_setb; _IO_setbuf;
    _IO_setbuffer; _IO_setlinebuf; _IO_setvbuf; _IO_sgetn;
    _IO_sprintf; _IO_sputbackc; _IO_sscanf; _IO_str_init_readonly;
    _IO_str_init_static; _IO_str_overflow; _IO_str_pbackfail;
    _IO_str_seekoff; _IO_str_underflow; _IO_sungetc;
    _IO_switch_to_get_mode; _IO_un_link; _IO_ungetc;
    _IO_unsave_markers; _IO_vfprintf; _IO_vfscanf; _IO_vsprintf;

    # variables in normal name space
    stderr; stdin; stdout;

    # c*
    clearerr; clearerr_unlocked;

    # f*
    fclose; fcloseall; fdopen; feof; feof_locked; feof_unlocked; ferror;
    ferror_locked; ferror_unlocked; fflush; fflush_locked; fflush_unlocked;
    fgetc; fgetpos; fgets; fileno; fileno_locked; fileno_unlocked;
    fopen; fopencookie; fputc; fputc_locked; fputc_unlocked; fputs;
    fread; freopen; fseek; fsetpos; ftell; fwrite;

    # g*
    getc; getc_locked; getc_unlocked; getchar; getchar_unlocked; getdelim;
    gets;

    # o*
    open_memstream; open_obstack_stream; obstack_printf; obstack_vprintf;

    # p*
    pclose; popen; putc; putc_locked; putc_unlocked; putchar;
    putchar_unlocked; puts;

    # r*
    rewind;

    # s*
    setbuf; setbuffer; setlinebuf; setvbuf;

    # u*
    ungetc;

    # v*
    vasprintf; vdprintf; vscanf; vsnprintf; vsprintf; vsscanf;
  }
  GLIBC_2.1 {
    # global variables
    _IO_2_1_stdin_; _IO_2_1_stdout_; _IO_2_1_stderr_;

    # functions used in other libraries
    _IO_fclose; _IO_fopen; _IO_fdopen; __asprintf;

    # Changed getline function in libio.
    _IO_getline_info;

    # f*
    fgetpos64; fopen64; freopen64; fseeko; fseeko64; fsetpos64; ftello;
    ftello64; fopen; fclose; fdopen; fread_unlocked; fwrite_unlocked;
    fgets_unlocked;
  }
}