Remove tilegx port.

Since tile support has been removed from the Linux kernel for 4.17,
this patch removes the (unmaintained) port to tilegx from glibc (the
tilepro support having been previously removed).  This reflects the
general principle that a glibc port needs upstream support for the
architecture in all the components it build-depends on (so binutils,
GCC and the Linux kernel, for the normal case of a port supporting the
Linux kernel but no other OS), in order to be maintainable.

Apart from removal of sysdeps/tile and sysdeps/unix/sysv/linux/tile,
there are updates to various comments referencing tile for which
removal of those references seemed appropriate.  The configuration is
removed from README and from build-many-glibcs.py.  contrib.texi keeps
mention of removed contributions, but I updated Chris Metcalf's entry
to reflect that he also contributed the non-removed support for the
generic Linux kernel syscall interface.
__ASSUME_FADVISE64_64_NO_ALIGN support is removed, as it was only used
by tile.

	* sysdeps/tile: Remove.
	* sysdeps/unix/sysv/linux/tile: Likewise.
	* README (tilegx-*-linux-gnu): Remove from list of supported
	configurations.
	* manual/contrib.texi (Contributors): Mention Chris Metcalf's
	contribution of support for generic Linux kernel syscall
	interface.
	* scripts/build-many-glibcs.py (Context.add_all_configs): Remove
	tilegx configurations.
	(Config.install_linux_headers): Do not handle tile.
	* sysdeps/unix/sysv/linux/aarch64/ldsodefs.h: Do not mention Tile
	in comment.
	* sysdeps/unix/sysv/linux/nios2/Makefile: Likewise.
	* sysdeps/unix/sysv/linux/posix_fadvise.c: Likewise.
	[__ASSUME_FADVISE64_64_NO_ALIGN] (__ALIGNMENT_ARG): Remove
	conditional undefine and redefine.
	* sysdeps/unix/sysv/linux/posix_fadvise64.c: Do not mention Tile
	in comment.
	[__ASSUME_FADVISE64_64_NO_ALIGN] (__ALIGNMENT_ARG): Remove
	conditional undefine and redefine.

5 files changed, 0 insertions, 168 deletions

diff --git a/sysdeps/tile/bits/endian.h b/sysdeps/tile/bits/endian.h
deleted file mode 100644
index 835042a7ac..0000000000
--- a/sysdeps/tile/bits/endian.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* Set endianness for tile.  */
-
-#ifndef _ENDIAN_H
-# error "Never use <bits/endian.h> directly; include <endian.h> instead."
-#endif
-
-#if defined __BIG_ENDIAN__
-# define __BYTE_ORDER __BIG_ENDIAN
-#else
-# define __BYTE_ORDER __LITTLE_ENDIAN
-#endif
diff --git a/sysdeps/tile/bits/fenv.h b/sysdeps/tile/bits/fenv.h
deleted file mode 100644
index 3fe93fea01..0000000000
--- a/sysdeps/tile/bits/fenv.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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 _FENV_H
-# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
-#endif
-
-/* The TILE-Gx hardware does not provide floating-point exception
-   handling, and TILEPro does not support any floating-point operations.  */
-#define FE_ALL_EXCEPT 0
-
-/* TILE-Gx supports only round-to-nearest.  The software
-   floating-point support also acts this way.  */
-enum
-  {
-    __FE_UNDEFINED = 0,
-
-    FE_TONEAREST =
-#define FE_TONEAREST	1
-      FE_TONEAREST,
-  };
-
-/* Type representing exception flags (if there were any).  */
-typedef unsigned int fexcept_t;
-
-/* Type representing floating-point environment.  */
-typedef unsigned int fenv_t;
-
-/* If the default argument is used we use this value.  */
-#define FE_DFL_ENV	((const fenv_t *) -1l)
-
-#if __GLIBC_USE (IEC_60559_BFP_EXT)
-/* Type representing floating-point control modes.  */
-typedef unsigned int femode_t;
-
-/* Default floating-point control modes.  */
-# define FE_DFL_MODE	((const femode_t *) -1L)
-#endif
diff --git a/sysdeps/tile/bits/link.h b/sysdeps/tile/bits/link.h
deleted file mode 100644
index e78fd62bcb..0000000000
--- a/sysdeps/tile/bits/link.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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	_LINK_H
-# error "Never include <bits/link.h> directly; use <link.h> instead."
-#endif
-
-#define __need_int_reg_t
-#include <arch/abi.h>
-
-
-/* Registers for entry into PLT.  */
-typedef struct La_tile_regs
-{
-  __uint_reg_t lr_reg[10];
-} La_tile_regs;
-
-/* Return values for calls from PLT.  */
-typedef struct La_tile_retval
-{
-  /* Up to ten registers can be used for a return value (e.g. small struct). */
-  __uint_reg_t lrv_reg[10];
-} La_tile_retval;
-
-
-__BEGIN_DECLS
-
-extern ElfW(Addr) la_tile_gnu_pltenter (ElfW(Sym) *__sym, unsigned int __ndx,
-                                        uintptr_t *__refcook,
-                                        uintptr_t *__defcook,
-                                        La_tile_regs *__regs,
-                                        unsigned int *__flags,
-                                        const char *__symname,
-                                        long int *__framesizep);
-extern unsigned int la_tile_gnu_pltexit (ElfW(Sym) *__sym, unsigned int __ndx,
-                                         uintptr_t *__refcook,
-                                         uintptr_t *__defcook,
-                                         const La_tile_regs *__inregs,
-                                         La_tile_retval *__outregs,
-                                         const char *__symname);
-
-__END_DECLS
diff --git a/sysdeps/tile/bits/setjmp.h b/sysdeps/tile/bits/setjmp.h
deleted file mode 100644
index 22e8043783..0000000000
--- a/sysdeps/tile/bits/setjmp.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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/>.  */
-
-/* Define the machine-dependent type `jmp_buf'.  TILE version.  */
-#ifndef _BITS_SETJMP_H
-#define _BITS_SETJMP_H	1
-
-#if !defined _SETJMP_H && !defined _PTHREAD_H
-# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
-#endif
-
-#ifndef _ASM
-
-#define __need_int_reg_t
-#include <arch/abi.h>
-
-typedef __uint_reg_t __jmp_buf[32];
-
-#endif
-
-#endif /* bits/setjmp.h */
diff --git a/sysdeps/tile/bits/wordsize.h b/sysdeps/tile/bits/wordsize.h
deleted file mode 100644
index 9dc4da5de9..0000000000
--- a/sysdeps/tile/bits/wordsize.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* Determine the wordsize from the preprocessor defines.  */
-
-#ifdef __LP64__
-# define __WORDSIZE	64
-# define __WORDSIZE_TIME64_COMPAT32	1
-#else
-# define __WORDSIZE	32
-# define __WORDSIZE_TIME64_COMPAT32	0
-# define __WORDSIZE32_SIZE_ULONG	0
-# define __WORDSIZE32_PTRDIFF_LONG	0
-#endif