nios2: Remove all support for Nios II target.

nios2 target support in GCC was deprecated in GCC 14 as the
architecture has been EOL'ed by the vendor.  This patch removes the
entire port for GCC 15

There are still references to "nios2" in libffi and libgo.  Since those
libraries are imported into the gcc sources from master copies maintained
by other projects, those will need to be addressed elsewhere.

ChangeLog:
	* MAINTAINERS: Remove references to nios2.
	* configure.ac: Likewise.
	* configure: Regenerated.

config/ChangeLog:
	* mt-nios2-elf: Deleted.

contrib/ChangeLog:
	* config-list.mk: Remove references to Nios II.

gcc/ChangeLog:
	* common/config/nios2/*: Delete entire directory.
	* config/nios2/*: Delete entire directory.
	* config.gcc: Remove references to nios2.
	* configure.ac: Likewise.
	* doc/extend.texi: Likewise.
	* doc/install.texi: Likewise.
	* doc/invoke.texi: Likewise.
	* doc/md.texi: Likewise.
	* regenerate-opt-urls.py: Likewise.
	* config.in: Regenerated.
	* configure: Regenerated.

gcc/testsuite/ChangeLog:
	* g++.target/nios2/*: Delete entire directory.
	* gcc.target/nios2/*: Delete entire directory.
	* g++.dg/cpp0x/constexpr-rom.C: Remove refences to nios2.
	* g++.old-deja/g++.jason/thunk3.C: Likewise.
	* gcc.c-torture/execute/20101011-1.c: Likewise.
	* gcc.c-torture/execute/pr47237.c: Likewise.
	* gcc.dg/20020312-2.c: Likewise.
	* gcc.dg/20021029-1.c: Likewise.
	* gcc.dg/debug/btf/btf-datasec-1.c: Likewise.
	* gcc.dg/ifcvt-4.c: Likewise.
	* gcc.dg/stack-usage-1.c: Likewise.
	* gcc.dg/struct-by-value-1.c: Likewise.
	* gcc.dg/tree-ssa/reassoc-33.c: Likewise.
	* gcc.dg/tree-ssa/reassoc-34.c: Likewise.
	* gcc.dg/tree-ssa/reassoc-35.c: Likewise.
	* gcc.dg/tree-ssa/reassoc-36.c: Likewise.
	* lib/target-supports.exp: Likewise.

libgcc/ChangeLog:
	* config/nios2/*: Delete entire directory.
	* config.host: Remove refences to nios2.
	* unwind-dw2-fde-dip.c: Likewise.

1 files changed, 0 insertions, 35 deletions

diff --git a/gcc/config.gcc b/gcc/config.gcc
index c208174..12018d2 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -273,7 +273,6 @@ esac
 # Obsolete configurations.
 case ${target} in
      ia64*-*-hpux* | ia64*-*-*vms* | ia64*-*-elf*	\
-   | nios2*-*-*				\
  )
     if test "x$enable_obsolete" != xyes; then
       echo "*** Configuration ${target} is obsolete." >&2
@@ -514,10 +513,6 @@ nds32*)
 	esac
 	extra_objs="nds32-cost.o nds32-intrinsic.o nds32-isr.o nds32-md-auxiliary.o nds32-pipelines-auxiliary.o nds32-predicates.o nds32-memory-manipulation.o nds32-fp-as-gp.o nds32-relax-opt.o nds32-utils.o"
 	;;
-nios2-*-*)
-	cpu_type=nios2
-	extra_options="${extra_options} g.opt"
-	;;
 nvptx-*-*)
 	cpu_type=nvptx
 	c_target_objs="nvptx-c.o"
@@ -2913,23 +2908,6 @@ nds32*-*-*)
 		tm_defines="${tm_defines} TARGET_DEFAULT_EXT_DSP=1"
 	fi
 	;;
-nios2-*-*)
-	tm_file="elfos.h ${tm_file}"
-        tmake_file="${tmake_file} nios2/t-nios2"
-        case ${target} in
-        nios2-*-linux*)
-                tm_file="${tm_file} gnu-user.h linux.h glibc-stdint.h nios2/linux.h "
-                ;;
-	nios2-*-elf*)
-		tm_file="${tm_file} newlib-stdint.h nios2/elf.h"
-		extra_options="${extra_options} nios2/elf.opt"
-		;;
-	nios2-*-rtems*)
-		tm_file="${tm_file} newlib-stdint.h nios2/rtems.h rtems.h"
-		tmake_file="${tmake_file} t-rtems nios2/t-rtems"
-		;;
-        esac
-	;;
 nvptx-*)
 	tm_file="${tm_file} newlib-stdint.h"
 	use_gcc_stdint=wrap
@@ -5596,19 +5574,6 @@ case "${target}" in
 
 
 		;;
-	nios2*-*-*)
-		supported_defaults="arch"
-			case "$with_arch" in
-			"" | r1 | r2)
-				# OK
-				;;
-			*)
-				echo "Unknown arch used in --with-arch=$with_arch" 1>&2
-				exit 1
-				;;
-			esac
-		;;
-
 	nvptx-*)
 		supported_defaults=arch
 		TM_MULTILIB_CONFIG=$with_arch