When compiling 3.0.26a on Etch, I am receiving the following compiler warning:

nsswitch/idmap.c: In function 'idmap_init':
nsswitch/idmap.c:426: warning: initialization discards qualifiers from pointer target type

The corresponding line is shown below with "---->"

/* find associated backend (default: tdb) */
if (compat) {
   parm_backend = talloc_strdup(idmap_ctx, compat_backend);
} else {
---->   char *backend = lp_parm_const_string(-1, config_option,"backend", "tdb");
   parm_backend = talloc_strdup(idmap_ctx, backend);
}