libc {
  GLIBC_2.0 {
    # a*
    alphasort;

    # c*
    closedir;

    # d*
    dirfd;

    # g*
    getdirentries;

    # o*
    opendir;

    # r*
    readdir; readdir_r; rewinddir;

    # s*
    scandir; seekdir;

    # t*
    telldir;
  }
  GLIBC_2.1 {
    # a*
    alphasort64;

    # r*
    readdir64; readdir64_r;

    # s*
    scandir64;

    # v*
    versionsort; versionsort64;
  }
  GLIBC_2.2 {
    # g*
    getdirentries64;
  }
  GLIBC_2.4 {
    fdopendir;
  }
}