diff -urN gcc-4.9.2/gcc/config/i386/t-elf64 gcc-4.9.2/gcc/config/i386/t-elf64 --- gcc-4.9.2/gcc/config/i386/t-elf64 1969-12-31 16:00:00.000000000 -0800 +++ gcc-5.2.0/gcc/config/i386/t-elf64 2015-06-17 11:20:08.032513005 -0700 @@ -0,0 +1,38 @@ +# Copyright (C) 2002-2014 Free Software Foundation, Inc. +# +# This file is part of GCC. +# +# GCC is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GCC 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GCC; see the file COPYING3. If not see +# <http://www.gnu.org/licenses/>. + +# On Debian, Ubuntu and other derivative distributions, the 32bit libraries +# are found in /lib32 and /usr/lib32, /lib64 and /usr/lib64 are symlinks to +# /lib and /usr/lib, while other distributions install libraries into /lib64 +# and /usr/lib64. The LSB does not enforce the use of /lib64 and /usr/lib64, +# it doesn't tell anything about the 32bit libraries on those systems. Set +# MULTILIB_OSDIRNAMES according to what is found on the target. + +# To support i386, x86-64 and x32 libraries, the directory structrue +# should be: +# +# /lib has i386 libraries. +# /lib64 has x86-64 libraries. +# /libx32 has x32 libraries. +# +comma=, +MULTILIB_OPTIONS = $(subst $(comma),/,$(TM_MULTILIB_CONFIG)) +MULTILIB_DIRNAMES = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS))) +MULTILIB_OSDIRNAMES = m64=../lib64$(call if_multiarch,:x86_64-elf) +MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:i386-elf) +MULTILIB_OSDIRNAMES+= mx32=../libx32$(call if_multiarch,:x86_64-elf-x32) diff -urN gcc-4.9.2/gcc/config.gcc gcc-4.9.2/gcc/config.gcc --- gcc-4.9.2/gcc/config.gcc 2015-06-17 11:20:57.841008182 -0700 +++ gcc-5.2.0/gcc/config.gcc 2015-06-17 11:17:24.818890200 -0700 @@ -1353,6 +1353,30 @@ ;; x86_64-*-elf*) tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h" + tmake_file="${tmake_file} i386/t-elf64" + x86_multilibs="${with_multilib_list}" + if test "$x86_multilibs" = "default"; then + case ${with_abi} in + x32 | mx32) + x86_multilibs="mx32" + ;; + *) + x86_multilibs="m64,m32" + ;; + esac + fi + x86_multilibs=`echo $x86_multilibs | sed -e 's/,/ /g'` + for x86_multilib in ${x86_multilibs}; do + case ${x86_multilib} in + m32 | m64 | mx32) + TM_MULTILIB_CONFIG="${TM_MULTILIB_CONFIG},${x86_multilib}" + ;; + *) + echo "--with-multilib-list=${x86_with_multilib} not supported." + exit 1 + esac + done + TM_MULTILIB_CONFIG=`echo $TM_MULTILIB_CONFIG | sed 's/^,//'` ;; i[34567]86-*-rdos*) tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h newlib-stdint.h i386/i386elf.h i386/rdos.h" --- gcc-5.2.0/gcc/config/i386/x86-64.h.orig 2015-08-20 17:17:34.555919593 +0200 +++ gcc-5.2.0/gcc/config/i386/x86-64.h 2015-08-20 17:17:42.615908670 +0200 @@ -49,7 +49,7 @@ #define WCHAR_TYPE_SIZE 32 #undef ASM_SPEC -#define ASM_SPEC "%{m32:--32} %{m64:--64} %{mx32:--x32}" +#define ASM_SPEC "%{m16|m32:--32} %{m64:--64} %{mx32:--x32}" #undef ASM_OUTPUT_ALIGNED_BSS #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \