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, 47 deletions

diff --git a/sysdeps/nacl/createthread.c b/sysdeps/nacl/createthread.c
deleted file mode 100644
index 87466dc193..0000000000
--- a/sysdeps/nacl/createthread.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Low-level thread creation for NPTL.  NaCl version.
-   Copyright (C) 2015-2017 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/>.  */
-
-#include <nacl-interfaces.h>
-#include <pthread-pids.h>
-
-/* See the comments in pthread_create.c for the requirements for these
-   two macros and the create_thread function.  */
-
-#define START_THREAD_DEFN \
-  static void __attribute__ ((noreturn)) start_thread (void)
-#define START_THREAD_SELF THREAD_SELF
-
-/* pthread_create.c defines this using START_THREAD_DEFN
-   We need a forward declaration here so we can take its address.  */
-static void start_thread (void) __attribute__ ((noreturn));
-
-static int
-create_thread (struct pthread *pd, const struct pthread_attr *attr,
-	       bool *stopped_start, STACK_VARIABLES_PARMS, bool *thread_ran)
-{
-  pd->tid = __nacl_get_tid (pd);
-
-  pd->stopped_start = *stopped_start;
-  if (__glibc_unlikely (*stopped_start))
-    /* See CONCURRENCY NOTES in nptl/pthread_create.c.  */
-    lll_lock (pd->lock, LLL_PRIVATE);
-
-  TLS_DEFINE_INIT_TP (tp, pd);
-
-  return __nacl_irt_thread.thread_create (&start_thread, stackaddr, tp);
-}