Remove tilegx as a target

This target is no longer supported by common toolchains or operating
systems. If support is required, it can still be found in libunwind
version 1.7 and earlier.

Makefile.am

@@ -26,9 +26,6 @@ endif
 if ARCH_MIPS
 include_HEADERS += include/libunwind-mips.h
 endif
-if ARCH_TILEGX
-include_HEADERS += include/libunwind-tilegx.h
-endif
 if ARCH_X86
 include_HEADERS += include/libunwind-x86.h
 endif
@@ -87,8 +84,6 @@ noinst_HEADERS = include/dwarf.h include/dwarf_i.h include/dwarf-eh.h	\
 	include/tdep-hppa/jmpbuf.h include/tdep-hppa/dwarf-config.h	\
 	include/tdep-mips/libunwind_i.h					\
 	include/tdep-mips/jmpbuf.h include/tdep-mips/dwarf-config.h	\
-	include/tdep-tilegx/libunwind_i.h				\
-	include/tdep-tilegx/jmpbuf.h include/tdep-tilegx/dwarf-config.h	\
 	include/tdep-x86/libunwind_i.h					\
 	include/tdep-x86/jmpbuf.h include/tdep-x86/dwarf-config.h	\
 	include/tdep-x86_64/libunwind_i.h				\

README

@@ -16,7 +16,6 @@ This library supports several architecture/operating-system combinations:
 | Linux   | SuperH       | ✓      |
 | Linux   | IA-64        | ✓      |
 | Linux   | PARISC       | Works well, but C library missing unwind-info |
-| Linux   | Tilegx       | 64-bit mode only |
 | Linux   | MIPS         | ✓      |
 | Linux   | RISC-V       | 64-bit only |
 | Linux   | LoongArch    | 64-bit only |
@@ -54,7 +53,6 @@ such dependencies
 |    riscv     |     p      |      p     |
 |    s390x     |     p      |      p     |
 |    sh        |     r      |            |
-|    tilegx    |     r      |      r     |
 |    x86       |     p      |      r     |
 |    x86_64    |     p      |      p     |
 

configure.ac

@@ -94,7 +94,6 @@ AC_DEFUN([SET_ARCH],[
         [powerpc*],[$2=ppc$ppc_bits],
         [sh*],[$2=sh],
         [amd64],[$2=x86_64],
-        [tile*],[$2=tilegx],
         [riscv*],[$2=riscv],
         [loongarch64*],[$2=loongarch64],
         [$2=$1])
@@ -114,7 +113,7 @@ AC_ARG_ENABLE([coredump],
 )
 AS_IF([test "$enable_coredump" = "check"],
       [AS_CASE([$host_arch],
-               [aarch64*|arm*|mips*|sh*|x86*|tile*|riscv*|loongarch64], [enable_coredump=yes],
+               [aarch64*|arm*|mips*|sh*|x86*|riscv*|loongarch64], [enable_coredump=yes],
                [enable_coredump=no])]
 )
 AC_MSG_RESULT([$enable_coredump])
@@ -282,7 +281,7 @@ AC_ARG_ENABLE([cxx_exceptions],
 )
 AS_IF([test $enable_cxx_exceptions = check],
       [AS_CASE([$target_arch],
-               [aarch64*|arm*|mips*|x86*|tile*|s390x*|loongarch64], [enable_cxx_exceptions=no],
+               [aarch64*|arm*|mips*|x86*|s390x*|loongarch64], [enable_cxx_exceptions=no],
                [enable_cxx_exceptions=yes])]
 )
 AC_MSG_RESULT([$enable_cxx_exceptions])
@@ -333,7 +332,6 @@ AM_CONDITIONAL(ARCH_X86_64, test x$target_arch = xx86_64)
 AM_CONDITIONAL(ARCH_PPC32, test x$target_arch = xppc32)
 AM_CONDITIONAL(ARCH_PPC64, test x$target_arch = xppc64)
 AM_CONDITIONAL(ARCH_SH, test x$target_arch = xsh)
-AM_CONDITIONAL(ARCH_TILEGX, test x$target_arch = xtilegx)
 AM_CONDITIONAL(ARCH_S390X, test x$target_arch = xs390x)
 AM_CONDITIONAL(ARCH_RISCV, test x$target_arch = xriscv)
 AM_CONDITIONAL(ARCH_LOONGARCH64, test x$target_arch = xloongarch64)
@@ -344,12 +342,12 @@ AM_CONDITIONAL(OS_QNX, expr x$target_os : xnto-qnx >/dev/null)
 AM_CONDITIONAL(OS_SOLARIS, expr x$target_os : xsolaris >/dev/null)
 
 AC_MSG_CHECKING([for ELF helper width])
-case "${target_arch}" in
-(arm|hppa|ppc32|x86|sh) use_elf32=yes; AC_MSG_RESULT([32]);;
-(aarch64|ia64|ppc64|x86_64|s390x|tilegx)  use_elf64=yes; AC_MSG_RESULT([64]);;
-(mips|riscv|loongarch64)                  use_elfxx=yes; AC_MSG_RESULT([xx]);;
-*)                     AC_MSG_ERROR([Unknown ELF target: ${target_arch}])
-esac
+AS_CASE([${target_arch}],
+        [arm|hppa|ppc32|x86|sh],           [use_elf32=yes; AC_MSG_RESULT([32])],
+        [aarch64|ia64|ppc64|x86_64|s390x], [use_elf64=yes; AC_MSG_RESULT([64])],
+        [mips|riscv|loongarch64],          [use_elfxx=yes; AC_MSG_RESULT([xx])],
+        [AC_MSG_ERROR([Unknown ELF target: ${target_arch}])]
+)
 AM_CONDITIONAL(USE_ELF32, [test x$use_elf32 = xyes])
 AM_CONDITIONAL(USE_ELF64, [test x$use_elf64 = xyes])
 AM_CONDITIONAL(USE_ELFXX, [test x$use_elfxx = xyes])

include/libunwind.h.in

@@ -23,8 +23,6 @@
 # include "libunwind-x86.h"
 #elif defined __x86_64__
 # include "libunwind-x86_64.h"
-#elif defined __tilegx__
-# include "libunwind-tilegx.h"
 #elif defined __s390x__
 # include "libunwind-s390x.h"
 #elif defined __riscv || defined __riscv__