--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/rs6000/linux64.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,534 @@
+/* Definitions of target machine for GNU compiler,
+   for 64 bit PowerPC linux.
+   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+   2009  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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef RS6000_BI_ARCH
+
+#undef	DEFAULT_ABI
+#define	DEFAULT_ABI ABI_AIX
+
+#undef	TARGET_64BIT
+#define	TARGET_64BIT 1
+
+#define	DEFAULT_ARCH64_P 1
+#define	RS6000_BI_ARCH_P 0
+
+#else
+
+#define	DEFAULT_ARCH64_P (TARGET_DEFAULT & MASK_64BIT)
+#define	RS6000_BI_ARCH_P 1
+
+#endif
+
+#ifdef IN_LIBGCC2
+#undef TARGET_64BIT
+#ifdef __powerpc64__
+#define TARGET_64BIT 1
+#else
+#define TARGET_64BIT 0
+#endif
+#endif
+
+#undef	TARGET_AIX
+#define	TARGET_AIX TARGET_64BIT
+
+#ifdef HAVE_LD_NO_DOT_SYMS
+/* New ABI uses a local sym for the function entry point.  */
+extern int dot_symbols;
+#undef DOT_SYMBOLS
+#define DOT_SYMBOLS dot_symbols
+#endif
+
+#undef  PROCESSOR_DEFAULT
+#define PROCESSOR_DEFAULT PROCESSOR_POWER6
+#undef  PROCESSOR_DEFAULT64
+#define PROCESSOR_DEFAULT64 PROCESSOR_POWER6
+
+/* We don't need to generate entries in .fixup, except when
+   -mrelocatable or -mrelocatable-lib is given.  */
+#undef RELOCATABLE_NEEDS_FIXUP
+#define RELOCATABLE_NEEDS_FIXUP \
+  (target_flags & target_flags_explicit & MASK_RELOCATABLE)
+
+#undef	RS6000_ABI_NAME
+#define	RS6000_ABI_NAME "linux"
+
+#define INVALID_64BIT "-m%s not supported in this configuration"
+#define INVALID_32BIT INVALID_64BIT
+
+#undef	SUBSUBTARGET_OVERRIDE_OPTIONS
+#define	SUBSUBTARGET_OVERRIDE_OPTIONS				\
+  do								\
+    {								\
+      if (!rs6000_explicit_options.alignment)			\
+	rs6000_alignment_flags = MASK_ALIGN_NATURAL;		\
+      if (TARGET_64BIT)						\
+	{							\
+	  if (DEFAULT_ABI != ABI_AIX)				\
+	    {							\
+	      rs6000_current_abi = ABI_AIX;			\
+	      error (INVALID_64BIT, "call");			\
+	    }							\
+	  dot_symbols = !strcmp (rs6000_abi_name, "aixdesc");	\
+	  if (target_flags & MASK_RELOCATABLE)			\
+	    {							\
+	      target_flags &= ~MASK_RELOCATABLE;		\
+	      error (INVALID_64BIT, "relocatable");		\
+	    }							\
+	  if (target_flags & MASK_EABI)				\
+	    {							\
+	      target_flags &= ~MASK_EABI;			\
+	      error (INVALID_64BIT, "eabi");			\
+	    }							\
+	  if (TARGET_PROTOTYPE)					\
+	    {							\
+	      TARGET_PROTOTYPE = 0;				\
+	      error (INVALID_64BIT, "prototype");		\
+	    }							\
+	  if ((target_flags & MASK_POWERPC64) == 0)		\
+	    {							\
+	      target_flags |= MASK_POWERPC64;			\
+	      error ("-m64 requires a PowerPC64 cpu");		\
+	    }							\
+	}							\
+      else							\
+	{							\
+	  if (!RS6000_BI_ARCH_P)				\
+	    error (INVALID_32BIT, "32");			\
+	  if (TARGET_PROFILE_KERNEL)				\
+	    {							\
+	      target_flags &= ~MASK_PROFILE_KERNEL;		\
+	      error (INVALID_32BIT, "profile-kernel");		\
+	    }							\
+	}							\
+    }								\
+  while (0)
+
+#ifdef	RS6000_BI_ARCH
+
+#undef	OVERRIDE_OPTIONS
+#define	OVERRIDE_OPTIONS \
+  rs6000_override_options (((TARGET_DEFAULT ^ target_flags) & MASK_64BIT) \
+			   ? (char *) 0 : TARGET_CPU_DEFAULT)
+
+#endif
+
+#undef	ASM_DEFAULT_SPEC
+#undef	ASM_SPEC
+#undef	LINK_OS_LINUX_SPEC
+
+#ifndef	RS6000_BI_ARCH
+#define	ASM_DEFAULT_SPEC "-mppc64"
+#define	ASM_SPEC	 "%(asm_spec64) %(asm_spec_common)"
+#define	LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)"
+#else
+#if DEFAULT_ARCH64_P
+#define	ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
+#define	ASM_SPEC	 "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
+#define	LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}"
+#else
+#define	ASM_DEFAULT_SPEC "-mppc%{m64:64}"
+#define	ASM_SPEC	 "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
+#define	LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}"
+#endif
+#endif
+
+#define ASM_SPEC32 "-a32 %{n} %{T} %{Ym,*} %{Yd,*} \
+%{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \
+%{memb} %{!memb: %{msdata: -memb} %{msdata=eabi: -memb}} \
+%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
+    %{mcall-freebsd: -mbig} \
+    %{mcall-i960-old: -mlittle} \
+    %{mcall-linux: -mbig} \
+    %{mcall-gnu: -mbig} \
+    %{mcall-netbsd: -mbig} \
+}}}}"
+
+#define ASM_SPEC64 "-a64"
+
+#define ASM_SPEC_COMMON "%(asm_cpu) \
+%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
+%{v:-V} %{Qy:} %{!Qn:-Qy} %{Wa,*:%*} \
+%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
+
+#undef	SUBSUBTARGET_EXTRA_SPECS
+#define SUBSUBTARGET_EXTRA_SPECS \
+  { "asm_spec_common",		ASM_SPEC_COMMON },			\
+  { "asm_spec32",		ASM_SPEC32 },				\
+  { "asm_spec64",		ASM_SPEC64 },				\
+  { "link_os_linux_spec32",	LINK_OS_LINUX_SPEC32 },			\
+  { "link_os_linux_spec64",	LINK_OS_LINUX_SPEC64 },
+
+#undef	MULTILIB_DEFAULTS
+#if DEFAULT_ARCH64_P
+#define MULTILIB_DEFAULTS { "m64" }
+#else
+#define MULTILIB_DEFAULTS { "m32" }
+#endif
+
+#ifndef RS6000_BI_ARCH
+
+/* 64-bit PowerPC Linux is always big-endian.  */
+#undef	TARGET_LITTLE_ENDIAN
+#define TARGET_LITTLE_ENDIAN	0
+
+/* 64-bit PowerPC Linux always has a TOC.  */
+#undef  TARGET_TOC
+#define	TARGET_TOC		1
+
+/* Some things from sysv4.h we don't do when 64 bit.  */
+#undef	TARGET_RELOCATABLE
+#define	TARGET_RELOCATABLE	0
+#undef	TARGET_EABI
+#define	TARGET_EABI		0
+#undef	TARGET_PROTOTYPE
+#define	TARGET_PROTOTYPE	0
+#undef RELOCATABLE_NEEDS_FIXUP
+#define RELOCATABLE_NEEDS_FIXUP 0
+
+#endif
+
+/* We use glibc _mcount for profiling.  */
+#define NO_PROFILE_COUNTERS 1
+#define PROFILE_HOOK(LABEL) \
+  do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
+
+/* PowerPC64 Linux word-aligns FP doubles when -malign-power is given.  */
+#undef  ADJUST_FIELD_ALIGN
+#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
+  ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE)	\
+   ? 128								\
+   : (TARGET_64BIT							\
+      && TARGET_ALIGN_NATURAL == 0					\
+      && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode)	\
+   ? MIN ((COMPUTED), 32)						\
+   : (COMPUTED))
+
+/* PowerPC64 Linux increases natural record alignment to doubleword if
+   the first field is an FP double, only if in power alignment mode.  */
+#undef  ROUND_TYPE_ALIGN
+#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED)			\
+  ((TARGET_64BIT							\
+    && (TREE_CODE (STRUCT) == RECORD_TYPE				\
+	|| TREE_CODE (STRUCT) == UNION_TYPE				\
+	|| TREE_CODE (STRUCT) == QUAL_UNION_TYPE)			\
+    && TARGET_ALIGN_NATURAL == 0)					\
+   ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED)	\
+   : MAX ((COMPUTED), (SPECIFIED)))
+
+/* Use the default for compiling target libs.  */
+#ifdef IN_TARGET_LIBS
+#undef TARGET_ALIGN_NATURAL
+#define TARGET_ALIGN_NATURAL 1
+#endif
+
+/* Indicate that jump tables go in the text section.  */
+#undef  JUMP_TABLES_IN_TEXT_SECTION
+#define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
+
+/* The linux ppc64 ABI isn't explicit on whether aggregates smaller
+   than a doubleword should be padded upward or downward.  You could
+   reasonably assume that they follow the normal rules for structure
+   layout treating the parameter area as any other block of memory,
+   then map the reg param area to registers.  i.e. pad upward.
+   Setting both of the following defines results in this behavior.
+   Setting just the first one will result in aggregates that fit in a
+   doubleword being padded downward, and others being padded upward.
+   Not a bad idea as this results in struct { int x; } being passed
+   the same way as an int.  */
+#define AGGREGATE_PADDING_FIXED TARGET_64BIT
+#define AGGREGATES_PAD_UPWARD_ALWAYS 0
+
+/* Specify padding for the last element of a block move between
+   registers and memory.  FIRST is nonzero if this is the only
+   element.  */
+#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
+  (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
+
+/* __throw will restore its own return address to be the same as the
+   return address of the function that the throw is being made to.
+   This is unfortunate, because we want to check the original
+   return address to see if we need to restore the TOC.
+   So we have to squirrel it away with this.  */
+#define SETUP_FRAME_ADDRESSES() \
+  do { if (TARGET_64BIT) rs6000_aix_emit_builtin_unwind_init (); } while (0)
+
+/* Override svr4.h  */
+#undef MD_EXEC_PREFIX
+#undef MD_STARTFILE_PREFIX
+
+/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
+   process.  */
+#define OS_MISSING_POWERPC64 !TARGET_64BIT
+
+/* glibc has float and long double forms of math functions.  */
+#undef  TARGET_C99_FUNCTIONS
+#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
+
+/* Whether we have sincos that follows the GNU extension.  */
+#undef  TARGET_HAS_SINCOS
+#define TARGET_HAS_SINCOS (OPTION_GLIBC)
+
+#undef  TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()			\
+  do							\
+    {							\
+      if (TARGET_64BIT)					\
+	{						\
+	  builtin_define ("__PPC__");			\
+	  builtin_define ("__PPC64__");			\
+	  builtin_define ("__powerpc__");		\
+	  builtin_define ("__powerpc64__");		\
+	  builtin_assert ("cpu=powerpc64");		\
+	  builtin_assert ("machine=powerpc64");		\
+	}						\
+      else						\
+	{						\
+	  builtin_define_std ("PPC");			\
+	  builtin_define_std ("powerpc");		\
+	  builtin_assert ("cpu=powerpc");		\
+	  builtin_assert ("machine=powerpc");		\
+	  TARGET_OS_SYSV_CPP_BUILTINS ();		\
+	}						\
+    }							\
+  while (0)
+
+#undef  CPP_OS_DEFAULT_SPEC
+#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
+
+/* The GNU C++ standard library currently requires _GNU_SOURCE being
+   defined on glibc-based systems. This temporary hack accomplishes this,
+   it should go away as soon as libstdc++-v3 has a real fix.  */
+#undef  CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
+
+#undef  LINK_SHLIB_SPEC
+#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
+
+#undef  LIB_DEFAULT_SPEC
+#define LIB_DEFAULT_SPEC "%(lib_linux)"
+
+#undef  STARTFILE_DEFAULT_SPEC
+#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
+
+#undef	ENDFILE_DEFAULT_SPEC
+#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
+
+#undef	LINK_START_DEFAULT_SPEC
+#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
+
+#undef	LINK_OS_DEFAULT_SPEC
+#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
+
+#define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
+#define GLIBC_DYNAMIC_LINKER64 "/lib64/ld64.so.1"
+#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
+#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
+#if UCLIBC_DEFAULT
+#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}"
+#else
+#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}"
+#endif
+#define LINUX_DYNAMIC_LINKER32 \
+  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
+#define LINUX_DYNAMIC_LINKER64 \
+  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
+
+
+#define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux %{!shared: %{!static: \
+  %{rdynamic:-export-dynamic} \
+  %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}}}"
+
+#define LINK_OS_LINUX_SPEC64 "-m elf64ppc %{!shared: %{!static: \
+  %{rdynamic:-export-dynamic} \
+  %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}}"
+
+#undef  TOC_SECTION_ASM_OP
+#define TOC_SECTION_ASM_OP \
+  (TARGET_64BIT						\
+   ? "\t.section\t\".toc\",\"aw\""			\
+   : "\t.section\t\".got\",\"aw\"")
+
+#undef  MINIMAL_TOC_SECTION_ASM_OP
+#define MINIMAL_TOC_SECTION_ASM_OP \
+  (TARGET_64BIT						\
+   ? "\t.section\t\".toc1\",\"aw\""			\
+   : ((TARGET_RELOCATABLE || flag_pic)			\
+      ? "\t.section\t\".got2\",\"aw\""			\
+      : "\t.section\t\".got1\",\"aw\""))
+
+#undef  TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (PowerPC64 GNU/Linux)");
+
+/* Must be at least as big as our pointer type.  */
+#undef	SIZE_TYPE
+#define	SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
+
+#undef	PTRDIFF_TYPE
+#define	PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
+
+#undef	WCHAR_TYPE
+#define	WCHAR_TYPE (TARGET_64BIT ? "int" : "long int")
+#undef  WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+/* Override rs6000.h definition.  */
+#undef  ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+/* Override rs6000.h definition.  */
+#undef  ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+/* PowerPC no-op instruction.  */
+#undef  RS6000_CALL_GLUE
+#define RS6000_CALL_GLUE (TARGET_64BIT ? "nop" : "cror 31,31,31")
+
+#undef  RS6000_MCOUNT
+#define RS6000_MCOUNT "_mcount"
+
+#ifdef __powerpc64__
+/* _init and _fini functions are built from bits spread across many
+   object files, each potentially with a different TOC pointer.  For
+   that reason, place a nop after the call so that the linker can
+   restore the TOC pointer if a TOC adjusting call stub is needed.  */
+#if DOT_SYMBOLS
+#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)	\
+  asm (SECTION_OP "\n"					\
+"	bl ." #FUNC "\n"				\
+"	nop\n"						\
+"	.previous");
+#else
+#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)	\
+  asm (SECTION_OP "\n"					\
+"	bl " #FUNC "\n"					\
+"	nop\n"						\
+"	.previous");
+#endif
+#endif
+
+/* FP save and restore routines.  */
+#undef  SAVE_FP_PREFIX
+#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
+#undef  SAVE_FP_SUFFIX
+#define SAVE_FP_SUFFIX (TARGET_64BIT ? "" : "_l")
+#undef  RESTORE_FP_PREFIX
+#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
+#undef  RESTORE_FP_SUFFIX
+#define RESTORE_FP_SUFFIX (TARGET_64BIT ? "" : "_l")
+
+/* Dwarf2 debugging.  */
+#undef  PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+
+/* This is how to declare the size of a function.  */
+#undef	ASM_DECLARE_FUNCTION_SIZE
+#define	ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)			\
+  do									\
+    {									\
+      if (!flag_inhibit_size_directive)					\
+	{								\
+	  fputs ("\t.size\t", (FILE));					\
+	  if (TARGET_64BIT && DOT_SYMBOLS)				\
+	    putc ('.', (FILE));						\
+	  assemble_name ((FILE), (FNAME));				\
+	  fputs (",.-", (FILE));					\
+	  rs6000_output_function_entry (FILE, FNAME);			\
+	  putc ('\n', (FILE));						\
+	}								\
+    }									\
+  while (0)
+
+/* Return nonzero if this entry is to be written into the constant
+   pool in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF
+   or a CONST containing one of them.  If -mfp-in-toc (the default),
+   we also do this for floating-point constants.  We actually can only
+   do this if the FP formats of the target and host machines are the
+   same, but we can't check that since not every file that uses
+   GO_IF_LEGITIMATE_ADDRESS_P includes real.h.  We also do this when
+   we can write the entry into the TOC and the entry is not larger
+   than a TOC entry.  */
+
+#undef  ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
+#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)			\
+  (TARGET_TOC								\
+   && (GET_CODE (X) == SYMBOL_REF					\
+       || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS	\
+	   && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)		\
+       || GET_CODE (X) == LABEL_REF					\
+       || (GET_CODE (X) == CONST_INT 					\
+	   && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))	\
+       || (GET_CODE (X) == CONST_DOUBLE					\
+	   && ((TARGET_64BIT						\
+		&& (TARGET_MINIMAL_TOC					\
+		    || (SCALAR_FLOAT_MODE_P (GET_MODE (X))		\
+			&& ! TARGET_NO_FP_IN_TOC)))			\
+	       || (!TARGET_64BIT					\
+		   && !TARGET_NO_FP_IN_TOC				\
+		   && !TARGET_RELOCATABLE				\
+		   && SCALAR_FLOAT_MODE_P (GET_MODE (X))		\
+		   && BITS_PER_WORD == HOST_BITS_PER_INT)))))
+
+/* Select a format to encode pointers in exception handling data.  CODE
+   is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
+   true if the symbol may be affected by dynamic relocations.  */
+#undef	ASM_PREFERRED_EH_DATA_FORMAT
+#define	ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
+  ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE)			\
+   ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel		\
+      | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4))		\
+   : DW_EH_PE_absptr)
+
+/* For backward compatibility, we must continue to use the AIX
+   structure return convention.  */
+#undef DRAFT_V4_STRUCT_RET
+#define DRAFT_V4_STRUCT_RET (!TARGET_64BIT)
+
+#define TARGET_ASM_FILE_END rs6000_elf_end_indicate_exec_stack
+
+#define TARGET_POSIX_IO
+
+#define LINK_GCC_C_SEQUENCE_SPEC \
+  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
+
+/* Use --as-needed -lgcc_s for eh support.  */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif
+
+#define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* ppc32 glibc provides __stack_chk_guard in -0x7008(2),
+   ppc64 glibc provides it at -0x7010(13).  */
+#define TARGET_THREAD_SSP_OFFSET	(TARGET_64BIT ? -0x7010 : -0x7008)
+#endif
+
+#define POWERPC_LINUX
+
+/* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later.  */
+#ifdef TARGET_DEFAULT_LONG_DOUBLE_128
+#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
+#endif