libc {

  GLIBC_2.0 {

    # functions with required interface outside normal name space

    __argz_count; __argz_stringify; __argz_next;

    # functions used in inline functions or macros

    __bzero; __strtok_r;

    # functions used in other libraries

    __ffs; __mempcpy; __stpncpy; __stpcpy; __strcasecmp; __strdup;

    __strerror_r;

    # a*

    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;

    # b*

    basename; bcmp; bcopy; bzero;

    # e*

    envz_add; envz_entry; envz_get; envz_merge; envz_remove;

    envz_strip;

    # f*

    ffs;

    # i*

    index;

    # m*

    memccpy; memchr; memcmp; memcpy; memfrob; memmem; memmove; memset;

    # r*

    rindex;

    # s*

    stpcpy; stpncpy; strcasecmp; strcat; strchr; strcmp; strcoll; strcpy;

    strcspn; strdup; strerror; strerror_r; strfry; strlen; strncasecmp;

    strncat; strncmp; strncpy; strndup; strnlen; strpbrk; strrchr; strsep;

    strsignal; strspn; strstr; strtok; strtok_r; strxfrm; swab;

  }

  GLIBC_2.1 {

    # functions used in macros and other libraries

    __rawmemchr; __strcasestr;

    # f*

    ffsl; ffsll;

    # m*

    mempcpy;

    # r*

    rawmemchr;

    # s*

    strcasestr; strverscmp;

  }

  GLIBC_2.1.1 {

    # extern inline functions used by <bits/string2.h>

    __mempcpy_small; __stpcpy_small; __strcspn_c1; __strcspn_c2; __strcspn_c3;

    __strcpy_small; __strspn_c1; __strspn_c2; __strspn_c3; __strpbrk_c2;

    __strpbrk_c3; __strsep_1c; __strsep_2c; __strsep_3c; __strsep_g;

    __strtok_r_1c;

    # s*

    strchrnul; __strverscmp;

  }

  GLIBC_2.2 {

    # functions used in macros.

    __strndup;

    # m*

    memrchr;

  }

  GLIBC_2.3.4 {

    # x*

    __xpg_strerror_r;

  }

  GLIBC_2.6 {

    strerror_l;

  }

  GLIBC_2.24 {

  }

  GLIBC_2.25 {

    explicit_bzero;

  }

}