Remove --enable-obsolete-nsl configure flag

this means that *always* libnsl is only built as shared library for
backward compatibility and the NSS modules libnss_nis and libnss_nisplus
are not built at all, libnsl's headers aren't installed.

This compatibility is kept only for architectures and ABIs that have
been added in or before version 2.28.

Replacement implementations based on TIRPC, which additionally support
IPv6, are available from <https://github.com/thkukuk/>.

This change does not affect libnss_compat which does not depended
on libnsl since 2.27 and thus can be used without NIS.

libnsl code depends on Sun RPC, e.g. on --enable-obsolete-rpc (installed
libnsl headers use installed Sun RPC headers), which will be removed in
the following commit.

1 files changed, 0 insertions, 127 deletions

diff --git a/nis/nss-default.c b/nis/nss-default.c
deleted file mode 100644
index 7fb06461cd..0000000000
--- a/nis/nss-default.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdio_ext.h>
-#include <stdlib.h>
-#include <string.h>
-#include <libc-lock.h>
-
-#include <libnsl.h>
-
-
-/* Path of the file.  */
-static const char default_nss[] = "/etc/default/nss";
-
-/* Flags once read from the file.  */
-static int default_nss_flags;
-
-/* Code to make sure we call 'init' once.  */
-__libc_once_define (static, once);
-
-/* Table of the recognized variables.  */
-static const struct
-{
-  char name[23];
-  unsigned int len;
-  int flag;
-} vars[] =
-  {
-#define STRNLEN(s) s, sizeof (s) - 1
-    { STRNLEN ("NETID_AUTHORITATIVE"), NSS_FLAG_NETID_AUTHORITATIVE },
-    { STRNLEN ("SERVICES_AUTHORITATIVE"), NSS_FLAG_SERVICES_AUTHORITATIVE },
-    { STRNLEN ("SETENT_BATCH_READ"), NSS_FLAG_SETENT_BATCH_READ },
-    { STRNLEN ("ADJUNCT_AS_SHADOW"), NSS_FLAG_ADJUNCT_AS_SHADOW },
-  };
-#define nvars (sizeof (vars) / sizeof (vars[0]))
-
-
-static void
-init (void)
-{
-  int saved_errno = errno;
-  FILE *fp = fopen (default_nss, "rce");
-  if (fp != NULL)
-    {
-      char *line = NULL;
-      size_t linelen = 0;
-
-      __fsetlocking (fp, FSETLOCKING_BYCALLER);
-
-      while (!feof_unlocked (fp))
-	{
-	  ssize_t n = getline (&line, &linelen, fp);
-	  if (n <= 0)
-	    break;
-
-	  /* Recognize only
-
-	       <THE-VARIABLE> = TRUE
-
-	     with arbitrary white spaces.  */
-	  char *cp = line;
-	  while (isspace (*cp))
-	    ++cp;
-
-	  /* Recognize comment lines.  */
-	  if (*cp == '#')
-	    continue;
-
-	  int idx;
-	  for (idx = 0; idx < nvars; ++idx)
-	    if (strncmp (cp, vars[idx].name, vars[idx].len) == 0)
-	      break;
-	  if (idx == nvars)
-	    continue;
-
-	  cp += vars[idx].len;
-	  while (isspace (*cp))
-	    ++cp;
-	  if (*cp++ != '=')
-	    continue;
-	  while (isspace (*cp))
-	    ++cp;
-
-	  if (strncmp (cp, "TRUE", 4) != 0)
-	    continue;
-	  cp += 4;
-
-	  while (isspace (*cp))
-	    ++cp;
-
-	  if (*cp == '\0')
-	    default_nss_flags |= vars[idx].flag;
-	}
-
-      free (line);
-
-      fclose (fp);
-    }
-  __set_errno (saved_errno);
-}
-
-
-int
-_nsl_default_nss (void)
-{
-  /* If we have not yet read the file yet do it now.  */
-  __libc_once (once, init);
-
-  return default_nss_flags;
-}