libc {
  GLIBC_2.0 {
    # more or less standard functions
    __fillbf; __flshfp;

    # functions used in inline functions or macros
    __getdelim; __line_wrap_output; __line_wrap_update;
    __vfscanf; __vsscanf;

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

    # c*
    clearerr;

    # f*
    fclose; fcloseall; fdopen; feof; ferror; fflush; fgetc; fgetpos; fgets;
    fileno; fmemopen; fopen; fopencookie; fputc; fputs; fread; freopen;
    fseek; fsetpos; ftell; fwrite;

    # g*
    getc; getchar; getdelim; gets;

    # l*
    line_wrap_stream; line_unwrap_stream; line_wrapped; line_wrap_lmargin;
    line_wrap_set_lmargin; line_wrap_rmargin; line_wrap_set_rmargin;
    line_wrap_wmargin; line_wrap_set_wmargin; line_wrap_point;

    # o*
    open_memstream; open_obstack_stream; obstack_printf; obstack_vprintf;

    # p*
    pclose; popen; putc; putchar; puts;

    # r*
    rewind;

    # s*
    setbuf; setbuffer; setlinebuf; setvbuf;

    # u*
    ungetc;

    # v*
    vasprintf; vdprintf; vscanf; vsnprintf; vsprintf; vsscanf;
  }
  GLIBC_2.1 {
    # functions used in other libraries
    __asprintf;

    # c*
    clearerr_unlocked;

    # f*
    feof_unlocked; ferror_unlocked; fflush_unlocked;  fgets_unlocked;
    fileno_unlocked; fputc_unlocked; fputs_unlocked;
    fread_unlocked; fwrite_unlocked;

    # g*
    getc_unlocked; getchar_unlocked;

    # p*
    putc_unlocked; putchar_unlocked;
  }
}