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, 65 deletions

diff --git a/sysdeps/nacl/dl-unmap-segments.h b/sysdeps/nacl/dl-unmap-segments.h
deleted file mode 100644
index 6d44a7e..0000000
--- a/sysdeps/nacl/dl-unmap-segments.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/* Unmap a shared object's segments.  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/>.  */
-
-#ifndef _DL_UNMAP_SEGMENTS_H
-#define _DL_UNMAP_SEGMENTS_H    1
-
-#include <link.h>
-#include <sys/mman.h>
-
-/* There is always a big gap between the executable segment and the data
-   segments.  Other code segments and data pages lie in there.  So we must
-   unmap each segment individually (except for a codeless module).  */
-
-static void __always_inline
-_dl_unmap_segments (struct link_map *l)
-{
-  if (l->l_contiguous)
-    /* Simple case.  */
-    __munmap ((void *) l->l_map_start, l->l_map_end - l->l_map_start);
-  else
-    {
-      /* Normally l_phdr points into the RODATA segment, which we will
-         unmap in one iteration of the loop.  So we cannot use it directly
-         throughout.  */
-
-      struct { ElfW(Addr) start, end; } segments[l->l_phnum], *seg = segments;
-
-      for (const ElfW(Phdr) *ph = l->l_phdr; ph < &l->l_phdr[l->l_phnum]; ++ph)
-        if (ph->p_type == PT_LOAD)
-          {
-            seg->start = (l->l_addr + ph->p_vaddr) & -GLRO(dl_pagesize);
-            seg->end = (l->l_addr + ph->p_vaddr + ph->p_memsz
-                        + GLRO(dl_pagesize) - 1) & -GLRO(dl_pagesize);
-            if (seg > segments && seg[-1].end == seg->start)
-              /* Coalesce two adjacent segments into one munmap call.  */
-              seg[-1].end = seg->end;
-            else
-              ++seg;
-          }
-
-      do
-        {
-          --seg;
-          __munmap ((void *) seg->start, seg->end - seg->start);
-        }
-      while (seg > segments);
-    }
-}
-
-#endif  /* dl-unmap-segments.h */