Remove the bulk of the NaCl port.

The NaCl port has not been actively maintained since before the 2.25
release.  The complementary GCC back-end was never contributed to GCC,
and we are given to understand that the current NaCl SDK has switched
to Clang and therefore cannot be used to build glibc anymore, so we
doubt that the port remains useful.

This commit simply removes the sysdeps/arm/nacl and sysdeps/nacl
directories and the abi-tags entry.

	Remove the NaCl port.
	* abi-tags: Remove .*-.*-nacl.* entry.
	* sysdeps/arm/nacl: Remove directory and contents.
	* sysdeps/nacl: Likewise.

1 files changed, 0 insertions, 248 deletions

diff --git a/sysdeps/nacl/futex-internal.h b/sysdeps/nacl/futex-internal.h
deleted file mode 100644
index de99d2d0d5..0000000000
--- a/sysdeps/nacl/futex-internal.h
+++ /dev/null
@@ -1,248 +0,0 @@
-/* futex operations for glibc-internal use.  NaCl version.
-   Copyright (C) 2014-2017 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
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef FUTEX_INTERNAL_H
-#define FUTEX_INTERNAL_H
-
-#include <sysdeps/nptl/futex-internal.h>
-#include <errno.h>
-#include <lowlevellock-futex.h>
-#include <nacl-interfaces.h>
-#include <nptl/pthreadP.h>
-
-/* See sysdeps/nptl/futex-internal.h for documentation; this file only
-   contains NaCl-specific comments.
-
-   There is no support yet for shared futexes nor for exact relative
-   timeouts.  */
-
-/* See sysdeps/nptl/futex-internal.h for constraints on the value of the
-   FUTEX_PRIVATE and FUTEX_SHARED constants.
-   Shared futexes are not yet supported, and we never allow clients to
-   actually request shared futexes.  Therefore, we do not need a different
-   value.  */
-#undef FUTEX_SHARED
-#define FUTEX_SHARED  FUTEX_PRIVATE
-
-/* FUTEX_SHARED is not yet supported.  */
-static __always_inline int
-futex_supports_pshared (int pshared)
-{
-  if (__glibc_likely (pshared == PTHREAD_PROCESS_PRIVATE))
-    return 0;
-  else if (pshared == PTHREAD_PROCESS_SHARED)
-    return ENOTSUP;
-  else
-    return EINVAL;
-}
-
-/* Relative timeouts are only emulated via absolute timeouts using the
-   system clock.  */
-static __always_inline bool
-futex_supports_exact_relative_timeouts (void)
-{
-  return false;
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_wait (unsigned int *futex_word, unsigned int expected, int private)
-{
-  int err = lll_futex_timed_wait (futex_word, expected, NULL, private);
-  switch (err)
-    {
-    case 0:
-    case -EAGAIN:
-    case -EINTR:
-      return -err;
-
-    case -ETIMEDOUT: /* Cannot have happened as we provided no timeout.  */
-    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
-		     being normalized.  Must have been caused by a glibc or
-		     application bug.  */
-    case -ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_wait_cancelable (unsigned int *futex_word, unsigned int expected,
-		       int private)
-{
-  int oldtype;
-  oldtype = __pthread_enable_asynccancel ();
-  int err = lll_futex_timed_wait (futex_word, expected, NULL, private);
-  __pthread_disable_asynccancel (oldtype);
-  switch (err)
-    {
-    case 0:
-    case -EAGAIN:
-    case -EINTR:
-      return -err;
-
-    case -ETIMEDOUT: /* Cannot have happened as we provided no timeout.  */
-    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
-		     being normalized.  Must have been caused by a glibc or
-		     application bug.  */
-    case -ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_reltimed_wait (unsigned int *futex_word, unsigned int expected,
-		     const struct timespec *reltime, int private)
-{
-  int err = lll_futex_timed_wait (futex_word, expected, reltime, private);
-  switch (err)
-    {
-    case 0:
-    case -EAGAIN:
-    case -EINTR:
-    case -ETIMEDOUT:
-      return -err;
-
-    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
-		     being normalized.  Must have been caused by a glibc or
-		     application bug.  */
-    case -ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_reltimed_wait_cancelable (unsigned int *futex_word,
-				unsigned int expected,
-			        const struct timespec *reltime, int private)
-{
-  int oldtype;
-  oldtype = __pthread_enable_asynccancel ();
-  int err = lll_futex_timed_wait (futex_word, expected, reltime, private);
-  __pthread_disable_asynccancel (oldtype);
-  switch (err)
-    {
-    case 0:
-    case -EAGAIN:
-    case -EINTR:
-    case -ETIMEDOUT:
-      return -err;
-
-    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
-		     being normalized.  Must have been caused by a glibc or
-		     application bug.  */
-    case -ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_abstimed_wait (unsigned int *futex_word, unsigned int expected,
-		     const struct timespec *abstime, int private)
-{
-  int err = __nacl_irt_futex.futex_wait_abs ((volatile int *) futex_word,
-					     expected, abstime);
-  switch (err)
-    {
-    case 0:
-    case EAGAIN:
-    case EINTR:
-    case ETIMEDOUT:
-      return err;
-
-    case EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case EINVAL: /* Either due to wrong alignment or due to the timeout not
-		    being normalized.  Must have been caused by a glibc or
-		    application bug.  */
-    case ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline int
-futex_abstimed_wait_cancelable (unsigned int *futex_word,
-				unsigned int expected,
-			        const struct timespec *abstime, int private)
-{
-  int oldtype;
-  oldtype = __pthread_enable_asynccancel ();
-  int err = __nacl_irt_futex.futex_wait_abs ((volatile int *) futex_word,
-					     expected, abstime);
-  __pthread_disable_asynccancel (oldtype);
-  switch (err)
-    {
-    case 0:
-    case EAGAIN:
-    case EINTR:
-    case ETIMEDOUT:
-      return err;
-
-    case EFAULT: /* Must have been caused by a glibc or application bug.  */
-    case EINVAL: /* Either due to wrong alignment or due to the timeout not
-		    being normalized.  Must have been caused by a glibc or
-		    application bug.  */
-    case ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-/* See sysdeps/nptl/futex-internal.h for details.  */
-static __always_inline void
-futex_wake (unsigned int *futex_word, int processes_to_wake, int private)
-{
-  int res = lll_futex_wake (futex_word, processes_to_wake, private);
-  /* No error.  Ignore the number of woken processes.  */
-  if (res >= 0)
-    return;
-  switch (res)
-    {
-    case -EFAULT: /* Could have happened due to memory reuse.  */
-    case -EINVAL: /* Could be either due to incorrect alignment (a bug in
-		     glibc or in the application) or due to memory being
-		     reused for a PI futex.  We cannot distinguish between the
-		     two causes, and one of them is correct use, so we do not
-		     act in this case.  */
-      return;
-    case -ENOSYS: /* Must have been caused by a glibc bug.  */
-    /* No other errors are documented at this time.  */
-    default:
-      futex_fatal_error ();
-    }
-}
-
-#endif  /* futex-internal.h */