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.

1 files changed, 0 insertions, 49 deletions

diff --git a/sysdeps/tile/Makefile b/sysdeps/tile/Makefile
deleted file mode 100644
index dcb8777a54..0000000000
--- a/sysdeps/tile/Makefile
+++ /dev/null
@@ -1,49 +0,0 @@
-include $(common-objpfx)cflags-mcmodel-large.mk
-
-# Check for gcc to support the command-line switch, and for
-# binutils to support the hwN_plt() assembly operators and relocations.
-$(common-objpfx)cflags-mcmodel-large.mk: $(common-objpfx)config.make
-	mcmodel=no; \
-	(echo 'int main() { return getuid(); }' | \
-	 $(CC) -o /dev/null -xc - -mcmodel=large -fpic) && mcmodel=yes; \
-	echo "cflags-mcmodel-large = $$mcmodel" > $@
-
-ifeq (yes,$(cflags-mcmodel-large))
-
-ifeq ($(subdir),csu)
-# elf-init.c is in libc_nonshared.o (the end of the shared object) but
-# must reach the _init symbol at the very start of the shared object.
-CFLAGS-elf-init.c += -mcmodel=large
-
-# __gmon_start__ is at the very start of the shared object when linked
-# with profiling, but calls to libc.so via the PLT at the very end.
-CFLAGS-gmon-start.c += -mcmodel=large
-endif
-
-else
-
-# Don't try to compile assembly code with hwN_plt() directives if the
-# toolchain doesn't support -mcmodel=large.
-ifeq ($(subdir),csu)
-CPPFLAGS-start.S += -DNO_PLT_PCREL
-CPPFLAGS-crti.S += -DNO_PLT_PCREL
-endif
-ifeq ($(subdir),nptl)
-CPPFLAGS-pt-crti.S += -DNO_PLT_PCREL
-endif
-
-endif
-
-# We don't support long doubles as a distinct type.  We don't need to set
-# this variable; it's here mostly for documentational purposes.
-
-long-double-fcts = no
-
-ifeq ($(subdir),gmon)
-sysdep_routines += _mcount
-endif
-
-ifeq ($(subdir),elf)
-# Extra shared linker files to link only into dl-allobjs.so.
-sysdep-rtld-routines += dl-start __tls_get_addr
-endif