darwin.h   [plain text]

/* Target definitions for Darwin (Mac OS X) systems.
   Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004
   Free Software Foundation, Inc.
   Contributed by Apple Computer 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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#ifndef CONFIG_DARWIN_H
#define CONFIG_DARWIN_H

/* The definitions in this file are common to all processor types
   running Darwin, which is the kernel for Mac OS X.  Darwin is
   basically a BSD user layer laid over a Mach kernel, then evolved
   for many years (at NeXT) in parallel with other Unix systems.  So
   while the runtime is a somewhat idiosyncratic Mach-based thing,
   other definitions look like they would for a BSD variant.  */

/* Although NeXT ran on many different architectures, as of Jan 2001
   the only supported Darwin targets are PowerPC and x86.  */

/* One of Darwin's NeXT legacies is the Mach-O format, which is partly
   like a.out and partly like COFF, with additional features like
   multi-architecture binary support.  */

#define OBJECT_FORMAT_MACHO

/* Suppress g++ attempt to link in the math library automatically.
   (Some Darwin versions have a libm, but they seem to cause problems
   for C++ executables.) This needs to be -lmx for Darwin 7.0 and
   above.  */
#ifndef MATH_LIBRARY
#define MATH_LIBRARY ""
#endif

/* We have atexit.  */

#define HAVE_ATEXIT

/* Define an empty body for the function do_global_dtors() in libgcc2.c.  */

#define DO_GLOBAL_DTORS_BODY

/* The string value for __SIZE_TYPE__.  */

#ifndef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"
#endif

/* Type used for ptrdiff_t, as a string used in a declaration.  */

#undef  PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"

/* wchar_t is int.  */

#undef	WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef	WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32

/* Default to using the NeXT-style runtime, since that's what is
   pre-installed on Darwin systems.  */

#define NEXT_OBJC_RUNTIME

/* Don't default to pcc-struct-return, because gcc is the only compiler, and
   we want to retain compatibility with older gcc versions.  */

#undef	DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0

/* APPLE LOCAL framework headers */
/* Need to look for framework headers.  */
#define FRAMEWORK_HEADERS

/* APPLE LOCAL begin -Wfour-char-constants */
/* Don't warn about MacOS-style 'APPL' four-char-constants.  */
#undef WARN_FOUR_CHAR_CONSTANTS
#define WARN_FOUR_CHAR_CONSTANTS 0
/* APPLE LOCAL end -Wfour-char-constants */

/* This table intercepts weirdo options whose names would interfere
   with normal driver conventions, and either translates them into
   standardly-named options, or adds a 'Z' so that they can get to
   specs processing without interference.

   Do not expand a linker option to "-Xlinker -<option>", since that
   forfeits the ability to control via spec strings later.  However,
   as a special exception, do this translation with -filelist, because
   otherwise the driver will think there are no input files and quit.
   (The alternative would be to hack the driver to recognize -filelist
   specially, but it's simpler to use the translation table.)

   Note that an option name with a prefix that matches another option
   name, that also takes an argument, needs to be modified so the
   prefix is different, otherwise a '*' after the shorter option will
   match with the longer one.
   
   The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
   in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
   command-line option translations specific to the particular target
   architecture.  */
   
#define TARGET_OPTION_TRANSLATE_TABLE \
  { "-all_load", "-Zall_load" },  \
  { "-allowable_client", "-Zallowable_client" },  \
  { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
  { "-bind_at_load", "-Zbind_at_load" },  \
  { "-bundle", "-Zbundle" },  \
  { "-bundle_loader", "-Zbundle_loader" },  \
  { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
  { "-dependency-file", "-MF" }, \
  { "-dylib_file", "-Zdylib_file" }, \
  { "-dynamic", "-Zdynamic" },  \
  { "-dynamiclib", "-Zdynamiclib" },  \
  { "-exported_symbols_list", "-Zexported_symbols_list" },  \
  { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
  { "-filelist", "-Xlinker -filelist -Xlinker" },  \
  { "-framework", "-Xlinker -framework -Xlinker" },  \
  { "-flat_namespace", "-Zflat_namespace" },  \
  { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
  { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
  { "-image_base", "-Zimage_base" },  \
  { "-init", "-Zinit" },  \
  { "-install_name", "-Zinstall_name" },  \
  { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
  { "-multiply_defined", "-Zmultiply_defined" },  \
  { "-multi_module", "-Zmulti_module" },  \
  { "-static", "-static -Wa,-static" },  \
  { "-single_module", "-Zsingle_module" },  \
  { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
  /* APPLE LOCAL begin constant cfstrings */	\
  { "-fconstant-cfstrings", "-mconstant-cfstrings" }, \
  { "-fno-constant-cfstrings", "-mno-constant-cfstrings" }, \
  { "-Wnonportable-cfstrings", "-mwarn-nonportable-cfstrings" }, \
  { "-Wno-nonportable-cfstrings", "-mno-warn-nonportable-cfstrings" }, \
  { "-fpascal-strings", "-mpascal-strings" },	\
  { "-fno-pascal-strings", "-mno-pascal-strings" },	\
  /* APPLE LOCAL end constant cfstrings */	\
  SUBTARGET_OPTION_TRANSLATE_TABLE

/* APPLE LOCAL begin constant cfstrings */
extern int darwin_constant_cfstrings;
extern const char *darwin_constant_cfstrings_switch;
extern int darwin_warn_nonportable_cfstrings;
extern const char *darwin_warn_nonportable_cfstrings_switch;
extern int darwin_pascal_strings;
extern const char *darwin_pascal_strings_switch;
extern int darwin_running_cxx;

#undef  SUBTARGET_OPTIONS
#define SUBTARGET_OPTIONS						\
   {"constant-cfstrings", &darwin_constant_cfstrings_switch,		\
    N_("Generate compile-time CFString objects"), 0},			\
   {"no-constant-cfstrings", &darwin_constant_cfstrings_switch, "", 0},	\
   {"pascal-strings", &darwin_pascal_strings_switch,			\
    N_("Allow use of Pascal strings"), 0},				\
   {"no-pascal-strings", &darwin_pascal_strings_switch, "", 0},		\
   {"warn-nonportable-cfstrings", &darwin_warn_nonportable_cfstrings_switch,		\
    N_("Warn if constant CFString objects contain non-portable characters"), 0},	\
   {"no-warn-nonportable-cfstrings", &darwin_warn_nonportable_cfstrings_switch, "", 0}

#define SUBTARGET_OS_CPP_BUILTINS()			\
  do							\
    {							\
      builtin_define ("__MACH__");			\
      builtin_define ("__APPLE__");			\
      if (darwin_constant_cfstrings)			\
	builtin_define ("__CONSTANT_CFSTRINGS__");	\
      /* APPLE LOCAL begin pascal strings */		\
      if (darwin_pascal_strings)			\
	{						\
	  builtin_define ("__PASCAL_STRINGS__");	\
	  CPP_OPTION (pfile, pascal_strings) = 1;	\
	}						\
      /* APPLE LOCAL end pascal strings */		\
    }							\
  while (0)

#define SUBSUBTARGET_OVERRIDE_OPTIONS					\
do {									\
  if (darwin_constant_cfstrings_switch)					\
    {									\
      const char *base = darwin_constant_cfstrings_switch;		\
      while (base[-1] != 'm') base--;					\
									\
      if (*darwin_constant_cfstrings_switch != '\0')			\
	error ("invalid option `%s'", base);				\
      darwin_constant_cfstrings = (base[0] != 'n');			\
    }									\
  if (darwin_warn_nonportable_cfstrings_switch)				\
    {									\
      const char *base = darwin_warn_nonportable_cfstrings_switch;	\
      while (base[-1] != 'm') base--;					\
									\
      if (*darwin_warn_nonportable_cfstrings_switch != '\0')		\
	error ("invalid option `%s'", base);				\
      darwin_warn_nonportable_cfstrings = (base[0] != 'n');		\
    }									\
  if (darwin_pascal_strings_switch)					\
    {									\
      const char *base = darwin_pascal_strings_switch;			\
      while (base[-1] != 'm') base--;					\
									\
      if (*darwin_pascal_strings_switch != '\0')			\
	error ("invalid option `%s'", base);				\
      darwin_pascal_strings = (base[0] != 'n');				\
    }									\
  /* The c_dialect...() macros are not available to us here.  */	\
  darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0);		\
} while(0)

#define SUBTARGET_INIT_BUILTINS		\
do {					\
  darwin_init_cfstring_builtins ();	\
} while(0)

#undef TARGET_EXPAND_TREE_BUILTIN
#define TARGET_EXPAND_TREE_BUILTIN darwin_expand_tree_builtin
#undef TARGET_CONSTRUCT_OBJC_STRING
#define TARGET_CONSTRUCT_OBJC_STRING darwin_construct_objc_string

/* APPLE LOCAL end constant cfstrings */

/* These compiler options take n arguments.  */

#undef  WORD_SWITCH_TAKES_ARG
#define WORD_SWITCH_TAKES_ARG(STR)              \
  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
   !strcmp (STR, "Zallowable_client") ? 1 :     \
   !strcmp (STR, "arch") ? 1 :                  \
   !strcmp (STR, "arch_only") ? 1 :             \
   !strcmp (STR, "Zbundle_loader") ? 1 :        \
   !strcmp (STR, "client_name") ? 1 :           \
   !strcmp (STR, "compatibility_version") ? 1 : \
   !strcmp (STR, "current_version") ? 1 :       \
   !strcmp (STR, "Zdylib_file") ? 1 :           \
   !strcmp (STR, "Zexported_symbols_list") ? 1 : \
   !strcmp (STR, "Zimage_base") ? 1 :           \
   !strcmp (STR, "Zinit") ? 1 :                 \
   !strcmp (STR, "Zinstall_name") ? 1 :         \
   !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
   !strcmp (STR, "Zmultiply_defined") ? 1 :     \
   !strcmp (STR, "precomp-trustfile") ? 1 :     \
   !strcmp (STR, "read_only_relocs") ? 1 :      \
   !strcmp (STR, "sectcreate") ? 3 :            \
   !strcmp (STR, "sectorder") ? 3 :             \
   !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
   !strcmp (STR, "seg1addr") ? 1 :              \
   !strcmp (STR, "segprot") ? 3 :               \
   !strcmp (STR, "seg_addr_table") ? 1 :        \
   !strcmp (STR, "sub_library") ? 1 :           \
   !strcmp (STR, "sub_umbrella") ? 1 :          \
   !strcmp (STR, "umbrella") ? 1 :              \
   !strcmp (STR, "undefined") ? 1 :             \
   !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
   !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
   !strcmp (STR, "pagezero_size") ? 1 :         \
   !strcmp (STR, "segs_read_only_addr") ? 1 :   \
   !strcmp (STR, "segs_read_write_addr") ? 1 :  \
   !strcmp (STR, "sectalign") ? 3 :             \
   !strcmp (STR, "sectobjectsymbols") ? 2 :     \
   !strcmp (STR, "segcreate") ? 3 :             \
   !strcmp (STR, "dylinker_install_name") ? 1 : \
   0)

/* Machine dependent cpp options.  __APPLE_CC__ is defined as the
   Apple include files expect it to be defined and won't work if it
   isn't.  */

#undef	CPP_SPEC
/* APPLE LOCAL -precomp-trustfile, -arch */
/* APPLE LOCAL __APPLE__ setting, don't set __APPLE__ here, as we do it someplace else */
#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__} \
		  %{precomp-trustfile} %{arch}"

/* APPLE LOCAL cc1plus spec  */
#undef CC1PLUS_SPEC
#define CC1PLUS_SPEC "-D__private_extern__=extern"

/* APPLE LOCAL begin fat builds */
/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
   precomp, libtool, and fat build additions.  Also we
   don't specify a second %G after %L because libSystem is
   self-contained and doesn't need to link against libgcc.a.  */
/* In general, random Darwin linker flags should go into LINK_SPEC
   instead of LINK_COMMAND_SPEC.  The command spec is better for
   specifying the handling of options understood by generic Unix
   linkers, and for positional arguments like libraries.  */
/* APPLE LOCAL  add fcreate-profile to LINK_COMMAND_SPEC */
#define LINK_COMMAND_SPEC "\
%{!foutput-dbg*:%{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
    %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
    %(darwin_arch_ld_spec) \
    %l %X %{d} %{s} %{t} %{Z} \
    %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
    %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
    %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
    %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|fcreate-profile:-lgcov} \
    %{!nostdlib:%{!nodefaultlibs:%G %L}} \
    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} \
    %{!--help:%{!no-c++filt|c++filt:| c++filt3 }} }}}}}}}}}"

/* Note that the linker
   output is always piped through c++filt (unless -no-c++filt is
   specified) to ensure error messages have demangled C++ names.
   We do this even for C.  */
/* nice idea, needs some work
   "%{!no-c++filt|c++filt:| " STANDARD_BINDIR_PREFIX cppfilt " }}}}}}}}" */
/* APPLE LOCAL end fat builds */

/* Please keep the random linker options in alphabetical order (modulo
   'Z' and 'no' prefixes).  Options that can only go to one of libtool
   or ld must be listed twice, under both !Zdynamiclib and
   Zdynamiclib, with one of the cases reporting an error.  */
/* Note that options taking arguments may appear multiple times on a
   command line with different arguments each time, so put a * after
   their names so all of them get passed.  */
#define LINK_SPEC  \
  "%{static}%{!static:-dynamic} \
   %{!Zdynamiclib: \
     %{Zbundle:-bundle} \
     %{Zbundle_loader*:-bundle_loader %*} \
     %{client_name*} \
     %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
} \
     %{current_version*:%e-current_version only allowed with -dynamiclib} \
     %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
     %{Zforce_flat_namespace:-force_flat_namespace} \
     %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
     %{keep_private_externs} \
     %{private_bundle} \
    } \
   %{Zdynamiclib: \
     %{Zbundle:%e-bundle not allowed with -dynamiclib} \
     %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
     %{client_name*:%e-client_name not allowed with -dynamiclib} \
     %{compatibility_version*} \
     %{current_version*} \
     %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
     %{Zinstall_name*:-install_name %*} \
     %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
     %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
    } \
   %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
   %{Zallowable_client*:-allowable_client %*} \
   %{Zbind_at_load:-bind_at_load} \
   %{Zarch_errors_fatal:-arch_errors_fatal} \
   %{Zdylib_file*:-dylib_file %*} \
   %{Zdynamic:-dynamic}\
   %{Zexported_symbols_list*:-exported_symbols_list %*} \
   %{Zflat_namespace:-flat_namespace} \
   %{headerpad_max_install_names*} \
   %{Zimage_base*:-image_base %*} \
   %{Zinit*:-init %*} \
   %{nomultidefs} \
   %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
   %{Zmultiply_defined*:-multiply_defined %*} \
   %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
   %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
   %{read_only_relocs} \
   %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} %{seg_addr_table*} \
   %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
   %{sub_library*} %{sub_umbrella*} \
   %{twolevel_namespace} %{twolevel_namespace_hints} \
   %{umbrella*} \
   %{undefined*} \
   %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
   %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
   %{X} \
   %{y*} \
   %{w} \
   %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
   %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
   %{whatsloaded} %{dylinker_install_name*} \
   %{dylinker} %{Mach} " 


/* Machine dependent libraries.  */

#undef	LIB_SPEC
#define LIB_SPEC "%{!static:-lSystem}"

/* APPLE LOCAL begin radar 3554191 and 3127145 */
#undef LIBGCC_SPEC
#undef REAL_LIBGCC_SPEC
#define REAL_LIBGCC_SPEC 					   \
   "%{static:-lgcc_static}					   \
    %{!static:%{static-libgcc:-lgcc -lgcc_eh}			   \
	      %{!static-libgcc:%{shared-libgcc:-lgcc_s%M -lgcc}	   \
			       %{!shared-libgcc:-lgcc -lgcc_eh}}}"
/* APPLE LOCAL end radar 3554191 and 3127145 */

/* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */

/* APPLE LOCAL IN FSF 2004-04-27 */
#undef  STARTFILE_SPEC
#define STARTFILE_SPEC  \
  "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
     %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
                     %{!static:%{object:-lgcrt0.o} \
                               %{!object:%{preload:-lgcrt0.o} \
                                 %{!preload:-lgcrt1.o crt2.o%s}}}} \
                %{!pg:%{static:-lcrt0.o} \
                      %{!static:%{object:-lcrt0.o} \
                                %{!object:%{preload:-lcrt0.o} \
                                  %{!preload:-lcrt1.o crt2.o%s}}}}}}"

/* The native Darwin linker doesn't necessarily place files in the order
   that they're specified on the link line.  Thus, it is pointless
   to put anything in ENDFILE_SPEC.  */
/* #define ENDFILE_SPEC "" */

/* We use Dbx symbol format.  */

#define DBX_DEBUGGING_INFO 1

/* Also enable Dwarf 2 as an option.  */
#define DWARF2_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

#define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
#define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
#define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
#define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
#define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
#define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
#define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
#define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
#define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
#define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"

/* APPLE LOCAL begin gdb only used symbols */
/* Support option to generate stabs for only used symbols. */

#define DBX_ONLY_USED_SYMBOLS
/* APPLE LOCAL end gdb only used symbols */

/* When generating stabs debugging, use N_BINCL entries.  */

#define DBX_USE_BINCL

/* There is no limit to the length of stabs strings.  */

#define DBX_CONTIN_LENGTH 0

/* gdb needs a null N_SO at the end of each file for scattered loading.  */

#undef	DBX_OUTPUT_MAIN_SOURCE_FILE_END
#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)			\
do { text_section ();							\
     fprintf (FILE,							\
	      "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO);	\
   } while (0)

/* Making a symbols weak on Darwin requires more than just setting DECL_WEAK. */
#define MAKE_DECL_ONE_ONLY(DECL) darwin_make_decl_one_only (DECL)

/* Representation of linkonce symbols for the MACH-O assembler. Linkonce
   symbols must be given a special section *and* must be preceded by a 
   special assembler directive. */
#define ASM_MAKE_LABEL_LINKONCE(FILE,  NAME)                            \
 do { const char* _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) {	\
  fputs (".weak_definition ", FILE); assemble_name (FILE, _x);		\
  fputs ("\n", FILE); }} while (0)

/* We support hidden visibility */
#undef TARGET_SUPPORTS_HIDDEN
#define TARGET_SUPPORTS_HIDDEN 1

/* The Darwin linker imposes two limitations on common symbols: they 
   can't have hidden visibility, and they can't appear in dylibs.  As
   a consequence, we should never use common symbols to represent 
   vague linkage. */
#undef USE_COMMON_FOR_ONE_ONLY
#define USE_COMMON_FOR_ONE_ONLY 0

/* The Darwin linker doesn't like explicit template instantiations to be
   coalesced, because it doesn't want coalesced symbols to appear in
   a static archive's table of contents. */
#undef TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY
#define TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY 0

/* We make exception information linkonce. */
#undef TARGET_USES_WEAK_UNWIND_INFO
#define TARGET_USES_WEAK_UNWIND_INFO 1

/* We need to use a nonlocal label for the start of an EH frame: the
   Darwin linker requires that a coalesced section start with a label. */
#undef FRAME_BEGIN_LABEL
#define FRAME_BEGIN_LABEL "EH_frame"

/* Emit a label for the FDE corresponding to DECL.  EMPTY means 
   emit a label for an empty FDE. */
#define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label

/* Our profiling scheme doesn't LP labels and counter words.  */

#define NO_PROFILE_COUNTERS	1

#undef	INIT_SECTION_ASM_OP
#define INIT_SECTION_ASM_OP

/* APPLE LOCAL static structors in __StaticInit section */
#define STATIC_INIT_SECTION "__TEXT,__StaticInit,regular,pure_instructions"

#undef	INVOKE__main

#define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor

/* Always prefix with an underscore.  */

#define USER_LABEL_PREFIX "_"

/* Don't output a .file directive.  That is only used by the assembler for
   error reporting.  */
#undef	TARGET_ASM_FILE_START_FILE_DIRECTIVE
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false

#undef  TARGET_ASM_FILE_END
#define TARGET_ASM_FILE_END darwin_file_end

#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)

/* Give ObjC methods pretty symbol names.  */

#undef	OBJC_GEN_METHOD_LABEL
#define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
  do { if (CAT_NAME)							\
	 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',		\
		  (CLASS_NAME), (CAT_NAME), (SEL_NAME));		\
       else								\
	 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',		\
		  (CLASS_NAME), (SEL_NAME));				\
     } while (0)

/* The RTTI data (e.g., __ti4name) is common and public (and static),
   but it does need to be referenced via indirect PIC data pointers.
   The machopic_define_name calls are telling the machopic subsystem
   that the name *is* defined in this module, so it doesn't need to
   make them indirect.  */

#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
  do {									\
    const char *xname = NAME;						\
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)		\
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));			\
    if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL))                   \
      if ((TREE_STATIC (DECL)						\
	   && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
          || DECL_INITIAL (DECL))					\
        machopic_define_name (xname);					\
    if ((TREE_STATIC (DECL)						\
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
        || DECL_INITIAL (DECL))						\
      (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);	\
    ASM_OUTPUT_LABEL (FILE, xname);					\
    /* Darwin doesn't support zero-size objects, so give them a	\
       byte.  */							\
    if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)			\
      assemble_zeros (1);						\
  } while (0)

#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
  do {									\
    const char *xname = NAME;                                           \
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
    if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL))			\
      if ((TREE_STATIC (DECL)                                           \
	   && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))             \
          || DECL_INITIAL (DECL))                                       \
        machopic_define_name (xname);                                   \
    if ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL))                                         \
      (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);	\
    ASM_OUTPUT_LABEL (FILE, xname);                                     \
  } while (0)

#define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)	\
  do {								\
    ASM_OUTPUT_LABEL (FILE, NAME);				\
    /* Darwin doesn't support zero-size objects, so give them a	\
       byte.  */						\
    if ((SIZE) == 0)						\
      assemble_zeros (1);					\
  } while (0)

/* Wrap new method names in quotes so the assembler doesn't gag.
   Make Objective-C internal symbols local.  */

#undef	ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(FILE,NAME)					     \
  do {									     \
       const char *xname = darwin_strip_name_encoding (NAME);		     \
       if (! strcmp (xname, "<pic base>"))				     \
         machopic_output_function_base_name(FILE);                           \
       else if (xname[0] == '&' || xname[0] == '*')			     \
         {								     \
           int len = strlen (xname);					     \
	   if (len > 6 && !strcmp ("$stub", xname + len - 5))		     \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 1);		     \
	   else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))	     \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 1);		     \
	   else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 0);		     \
	   /* APPLE LOCAL begin Objective-C++ */			\
	   if (xname[1] != '"' && name_needs_quotes (&xname[1]))		\
	     fprintf (FILE, "\"%s\"", &xname[1]);			\
	   else								\
	     fputs (&xname[1], FILE); 					\
	   /* APPLE LOCAL end Objective-C++ */				\
	 }								     \
       else if (xname[0] == '+' || xname[0] == '-')			     \
         fprintf (FILE, "\"%s\"", xname);				     \
       else if (!strncmp (xname, "_OBJC_", 6))				     \
         fprintf (FILE, "L%s", xname);					     \
       else if (!strncmp (xname, ".objc_class_name_", 17))		     \
	 fprintf (FILE, "%s", xname);					     \
	 /* APPLE LOCAL begin Objective-C++  */				\
       else if (xname[0] != '"' && name_needs_quotes (xname))		\
	 fprintf (FILE, "\"%s\"", xname);				\
	 /* APPLE LOCAL end Objective-C++  */				\
       else								     \
         fprintf (FILE, "_%s", xname);					     \
  } while (0)

/* Output before executable code.  */
#undef TEXT_SECTION_ASM_OP
#define TEXT_SECTION_ASM_OP ".text"

/* Output before writable data.  */

#undef DATA_SECTION_ASM_OP
#define DATA_SECTION_ASM_OP ".data"

#undef	ALIGN_ASM_OP
#define ALIGN_ASM_OP		".align"

#undef	ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
  if ((LOG) != 0)			\
    fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))

/* Ensure correct alignment of bss data.  */

#undef	ASM_OUTPUT_ALIGNED_DECL_LOCAL
#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)	\
  do {									\
    fputs (".lcomm ", (FILE));						\
    assemble_name ((FILE), (NAME));					\
    fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE),	\
	     floor_log2 ((ALIGN) / BITS_PER_UNIT));			\
    if ((DECL) && ((TREE_STATIC (DECL)					\
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
        || DECL_INITIAL (DECL)))					\
      (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);	\
    if ((DECL) && ((TREE_STATIC (DECL)					\
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
        || DECL_INITIAL (DECL)))					\
      machopic_define_name (NAME);					\
  } while (0)

/* The maximum alignment which the object file format can support.
   For Mach-O, this is 2^15.  */

#undef	MAX_OFILE_ALIGNMENT
#define MAX_OFILE_ALIGNMENT 0x8000

/* Create new Mach-O sections.  */

#undef	SECTION_FUNCTION
#define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)		\
extern void FUNCTION (void);						\
void									\
FUNCTION (void)								\
{									\
  if (in_section != SECTION)						\
    {									\
      if (OBJC)								\
	objc_section_init ();						\
      data_section ();							\
      if (asm_out_file)							\
	fprintf (asm_out_file, "%s\n", DIRECTIVE);			\
      in_section = SECTION;						\
    }									\
}									\

/* Darwin uses many types of special sections.  */

#undef	EXTRA_SECTIONS
#define EXTRA_SECTIONS					\
  in_const, in_const_data, in_cstring, in_literal4, in_literal8,	\
  in_constructor, in_destructor, in_mod_init, in_mod_term,		\
  in_objc_class, in_objc_meta_class, in_objc_category,	\
  in_objc_class_vars, in_objc_instance_vars,		\
  in_objc_cls_meth, in_objc_inst_meth,			\
  in_objc_cat_cls_meth, in_objc_cat_inst_meth,		\
  in_objc_selector_refs,				\
  in_objc_selector_fixup,				\
  in_objc_symbols, in_objc_module_info,			\
  in_objc_protocol, in_objc_string_object,		\
  in_objc_constant_string_object,			\
  /* APPLE LOCAL constant cfstrings */			\
  in_cfstring_constant_object,				\
  in_objc_image_info,					\
  in_objc_class_names, in_objc_meth_var_names,		\
  in_objc_meth_var_types, in_objc_cls_refs,		\
  in_machopic_nl_symbol_ptr,				\
  in_machopic_lazy_symbol_ptr,				\
  in_machopic_symbol_stub,				\
  in_machopic_symbol_stub1,				\
  in_machopic_picsymbol_stub,				\
  in_machopic_picsymbol_stub1,				\
  in_darwin_exception, in_darwin_eh_frame,		\
  num_sections

#undef	EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS			\
static void objc_section_init (void);		\
SECTION_FUNCTION (const_section,		\
                  in_const,			\
                  ".const", 0)			\
SECTION_FUNCTION (const_data_section,		\
                  in_const_data,		\
                  ".const_data", 0)		\
SECTION_FUNCTION (cstring_section,		\
		  in_cstring,			\
		  ".cstring", 0)		\
SECTION_FUNCTION (literal4_section,		\
		  in_literal4,			\
		  ".literal4", 0)		\
SECTION_FUNCTION (literal8_section,		\
		  in_literal8,			\
		  ".literal8", 0)		\
SECTION_FUNCTION (constructor_section,		\
		  in_constructor,		\
		  ".constructor", 0)		\
SECTION_FUNCTION (mod_init_section,		\
		  in_mod_init,			\
		  ".mod_init_func", 0)	\
SECTION_FUNCTION (mod_term_section, \
		  in_mod_term,			\
		  ".mod_term_func", 0)	\
SECTION_FUNCTION (destructor_section,		\
		  in_destructor,		\
		  ".destructor", 0)		\
SECTION_FUNCTION (objc_class_section,		\
		  in_objc_class,		\
		  ".objc_class", 1)		\
SECTION_FUNCTION (objc_meta_class_section,	\
		  in_objc_meta_class,		\
		  ".objc_meta_class", 1)	\
SECTION_FUNCTION (objc_category_section,	\
		  in_objc_category,		\
		".objc_category", 1)		\
SECTION_FUNCTION (objc_class_vars_section,	\
		  in_objc_class_vars,		\
		  ".objc_class_vars", 1)	\
SECTION_FUNCTION (objc_instance_vars_section,	\
		  in_objc_instance_vars,	\
		  ".objc_instance_vars", 1)	\
SECTION_FUNCTION (objc_cls_meth_section,	\
		  in_objc_cls_meth,		\
		  ".objc_cls_meth", 1)	\
SECTION_FUNCTION (objc_inst_meth_section,	\
		  in_objc_inst_meth,		\
		  ".objc_inst_meth", 1)	\
SECTION_FUNCTION (objc_cat_cls_meth_section,	\
		  in_objc_cat_cls_meth,		\
		  ".objc_cat_cls_meth", 1)	\
SECTION_FUNCTION (objc_cat_inst_meth_section,	\
		  in_objc_cat_inst_meth,	\
		  ".objc_cat_inst_meth", 1)	\
SECTION_FUNCTION (objc_selector_refs_section,	\
		  in_objc_selector_refs,	\
		  ".objc_message_refs", 1)	\
SECTION_FUNCTION (objc_selector_fixup_section,	\
		  in_objc_selector_fixup,	\
		  ".section __OBJC, __sel_fixup", 1)	\
SECTION_FUNCTION (objc_symbols_section,		\
		  in_objc_symbols,		\
		  ".objc_symbols", 1)	\
SECTION_FUNCTION (objc_module_info_section,	\
		  in_objc_module_info,		\
		  ".objc_module_info", 1)	\
SECTION_FUNCTION (objc_protocol_section,	\
		  in_objc_protocol,		\
		  ".objc_protocol", 1)	\
SECTION_FUNCTION (objc_string_object_section,	\
		  in_objc_string_object,	\
		  ".objc_string_object", 1)	\
SECTION_FUNCTION (objc_constant_string_object_section,	\
		  in_objc_constant_string_object,	\
		  ".section __OBJC, __cstring_object", 1)	\
/* APPLE LOCAL begin constant cfstrings */	\
/* Unlike constant NSStrings, constant CFStrings do not live */\
/* in the __OBJC segment since they may also occur in pure C */\
/* or C++ programs.  */\
SECTION_FUNCTION (cfstring_constant_object_section,	\
		  in_cfstring_constant_object,	\
		  ".section __DATA, __cfstring", 0)	\
/* APPLE LOCAL end constant cfstrings */	\
/* Fix-and-Continue image marker.  */		\
SECTION_FUNCTION (objc_image_info_section,	\
                  in_objc_image_info,		\
                  ".section __OBJC, __image_info", 1)	\
SECTION_FUNCTION (objc_class_names_section,	\
		in_objc_class_names,		\
		".objc_class_names", 1)	\
SECTION_FUNCTION (objc_meth_var_names_section,	\
		in_objc_meth_var_names,		\
		".objc_meth_var_names", 1)	\
SECTION_FUNCTION (objc_meth_var_types_section,	\
		in_objc_meth_var_types,		\
		".objc_meth_var_types", 1)	\
SECTION_FUNCTION (objc_cls_refs_section,	\
		in_objc_cls_refs,		\
		".objc_cls_refs", 1)		\
						\
SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,	\
		in_machopic_lazy_symbol_ptr,		\
		".lazy_symbol_pointer", 0)	\
SECTION_FUNCTION (machopic_nl_symbol_ptr_section,	\
		in_machopic_nl_symbol_ptr,		\
		".non_lazy_symbol_pointer", 0)	\
SECTION_FUNCTION (machopic_symbol_stub_section,		\
		in_machopic_symbol_stub,		\
		".symbol_stub", 0)		\
SECTION_FUNCTION (machopic_symbol_stub1_section,	\
		in_machopic_symbol_stub1,		\
		".section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16", 0)\
SECTION_FUNCTION (machopic_picsymbol_stub_section,	\
		in_machopic_picsymbol_stub,		\
		".picsymbol_stub", 0)		\
SECTION_FUNCTION (machopic_picsymbol_stub1_section,	\
		in_machopic_picsymbol_stub1,		\
		".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32", 0)\
SECTION_FUNCTION (darwin_exception_section,		\
		in_darwin_exception,			\
		".section __DATA,__gcc_except_tab", 0)	\
SECTION_FUNCTION (darwin_eh_frame_section,		\
		in_darwin_eh_frame,			\
		".section " EH_FRAME_SECTION_NAME ",__eh_frame" EH_FRAME_SECTION_ATTR, 0)  \
							\
static void					\
objc_section_init (void)			\
{						\
  static int been_here = 0;			\
						\
  if (been_here == 0)				\
    {						\
      been_here = 1;				\
          /* written, cold -> hot */		\
      objc_cat_cls_meth_section ();		\
      objc_cat_inst_meth_section ();		\
      objc_string_object_section ();		\
      objc_constant_string_object_section ();	\
      objc_selector_refs_section ();		\
      objc_selector_fixup_section ();		\
      objc_cls_refs_section ();			\
      objc_class_section ();			\
      objc_meta_class_section ();		\
          /* shared, hot -> cold */		\
      objc_cls_meth_section ();			\
      objc_inst_meth_section ();		\
      objc_protocol_section ();			\
      objc_class_names_section ();		\
      objc_meth_var_types_section ();		\
      objc_meth_var_names_section ();		\
      objc_category_section ();			\
      objc_class_vars_section ();		\
      objc_instance_vars_section ();		\
      objc_module_info_section ();		\
      objc_symbols_section ();			\
    }						\
}

#define READONLY_DATA_SECTION const_section

#undef	TARGET_ASM_SELECT_SECTION
#define TARGET_ASM_SELECT_SECTION machopic_select_section
#undef	TARGET_ASM_SELECT_RTX_SECTION
#define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
#undef  TARGET_ASM_UNIQUE_SECTION
#define TARGET_ASM_UNIQUE_SECTION darwin_unique_section



#define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)			\
    do {								\
	 if (FILE) {							\
	   if (MACHOPIC_INDIRECT)					\
	     fprintf (FILE, "\t.lazy_reference ");			\
	   else								\
	     fprintf (FILE, "\t.reference ");				\
	   assemble_name (FILE, NAME);					\
	   fprintf (FILE, "\n");					\
	 }                                                              \
       } while (0)

#define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)				\
    do {								\
	 if (FILE) {							\
	   fprintf (FILE, "\t");					\
	   assemble_name (FILE, NAME);					\
	   fprintf (FILE, "=0\n");					\
	   (*targetm.asm_out.globalize_label) (FILE, NAME);		\
	 }								\
       } while (0)

/* Globalizing directive for a label.  */
#define GLOBAL_ASM_OP ".globl "
#define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label

/* APPLE LOCAL begin weak definition */
#define ASM_WEAK_DEFINITIONIZE_LABEL(FILE,  NAME)                       \
 do { const char* _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) {	\
  fputs (".weak_definition ", FILE); assemble_name (FILE, _x);		\
  fputs ("\n", FILE); }} while (0)
/* APPLE LOCAL end weak definition */

/* Emit an assembler directive to set visibility for a symbol.  Used
   to support visibility attribute and Darwin's private extern
   feature.  */
#undef TARGET_ASM_ASSEMBLE_VISIBILITY
#define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility


#undef ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
  sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))

/* Since we have a separate readonly data section, define this so that
   jump tables end up in text rather than data.  */

#ifndef JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION 1
#endif

/* Symbolic names for various things we might know about a symbol.  */

enum machopic_addr_class {
  MACHOPIC_UNDEFINED,
  MACHOPIC_DEFINED_DATA,
  MACHOPIC_UNDEFINED_DATA,
  MACHOPIC_DEFINED_FUNCTION,
  MACHOPIC_UNDEFINED_FUNCTION
};

/* Macros defining the various PIC cases.  */

#define MACHO_DYNAMIC_NO_PIC_P	(TARGET_DYNAMIC_NO_PIC)
#define MACHOPIC_INDIRECT	(flag_pic || MACHO_DYNAMIC_NO_PIC_P)
#define MACHOPIC_JUST_INDIRECT	(flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
#define MACHOPIC_PURE		(flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)

#undef TARGET_ENCODE_SECTION_INFO
#define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
#undef TARGET_STRIP_NAME_ENCODING
#define TARGET_STRIP_NAME_ENCODING  darwin_strip_name_encoding

/* APPLE LOCAL what is this for? */
/* Be conservative and always redo the encoding.  */

#define REDO_SECTION_INFO_P(DECL) (1)

#define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)		\
  do {								\
    const char *const stub_ = (STUB);				\
    char *buffer_ = (BUF);					\
    strcpy (buffer_, stub_);					\
    if (stub_[0] == '"')					\
      {								\
	strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");	\
      }								\
    else							\
      {								\
	strcpy (buffer_ + (STUB_LENGTH), "_binder");		\
      }								\
  } while (0)

#define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)	\
  do {								\
    const char *const symbol_ = (SYMBOL);			\
    char *buffer_ = (BUF);					\
    if (name_needs_quotes (symbol_) && symbol_[0] != '"')	\
      {								\
	  sprintf (buffer_, "\"%s\"", symbol_);			\
      }								\
    else							\
      {								\
	strcpy (buffer_, symbol_);				\
      }								\
  } while (0)

/* Given a symbol name string, create the lazy pointer version
   of the symbol name.  */

#define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)	\
  do {								\
    const char *symbol_ = darwin_strip_name_encoding (SYMBOL);	\
    char *buffer_ = (BUF);					\
    if (symbol_[0] == '"')					\
      {								\
        strcpy (buffer_, "\"L");				\
        strcpy (buffer_ + 2, symbol_ + 1);			\
	strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");	\
      }								\
    else if (name_needs_quotes (symbol_))			\
      {								\
        strcpy (buffer_, "\"L");				\
        strcpy (buffer_ + 2, symbol_);				\
	strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");	\
      }								\
    else							\
      {								\
        strcpy (buffer_, "L");					\
        strcpy (buffer_ + 1, symbol_);				\
	strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");	\
      }								\
  } while (0)

#define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section

#define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section

#define EH_FRAME_SECTION_NAME   "__TEXT"
#define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms"

#undef ASM_PREFERRED_EH_DATA_FORMAT
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
  (((CODE) == 2 && (GLOBAL) == 1) \
   ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
     ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)

#define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
  darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)

#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)	\
      if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {				\
	darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);					\
	goto DONE;									\
      }


#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false

/* APPLE LOCAL OS pragma hook */
#define REGISTER_OS_PRAGMAS(PFILE)			\
  do {								\
    c_register_pragma (0, "mark", darwin_pragma_ignore);	\
    c_register_pragma (0, "options", darwin_pragma_options);	\
    c_register_pragma (0, "segment", darwin_pragma_ignore);	\
    c_register_pragma (0, "unused", darwin_pragma_unused);	\
    /* APPLE LOCAL begin Macintosh alignment 2002-1-22 --ff */  \
    cpp_register_pragma (PFILE, 0, "pack", darwin_pragma_pack);  \
    /* APPLE LOCAL end Macintosh alignment 2002-1-22 --ff */  \
    /* APPLE LOCAL begin CALL_ON_LOAD/CALL_ON_UNLOAD pragmas  20020202 --turly  */ \
    cpp_register_pragma (PFILE, 0, "CALL_ON_LOAD", \
					darwin_pragma_call_on_load); \
    cpp_register_pragma (PFILE, 0, "CALL_ON_UNLOAD", \
					darwin_pragma_call_on_unload); \
    /* APPLE LOCAL end CALL_ON_LOAD/CALL_ON_UNLOAD pragmas  20020202 --turly  */ \
    /* APPLE LOCAL begin CALL_ON_MODULE_BIND deprecated 2002-4-10 --ff */  \
    cpp_register_pragma (PFILE, 0, "CALL_ON_MODULE_BIND", darwin_pragma_call_on_module_bind);  \
    /* APPLE LOCAL end CALL_ON_MODULE_BIND deprecated 2002-4-10 --ff */  \
    /* APPLE LOCAL begin temporary pragmas 2001-07-05 --sts */  \
    cpp_register_pragma (PFILE, 0, "CC_NO_MACH_TEXT_SECTIONS", darwin_pragma_cc_no_mach_text_sections);  \
    cpp_register_pragma (PFILE, 0, "CC_OPT_OFF", darwin_pragma_cc_opt_off);  \
    cpp_register_pragma (PFILE, 0, "CC_OPT_ON", darwin_pragma_cc_opt_on);  \
    cpp_register_pragma (PFILE, 0, "CC_OPT_RESTORE", darwin_pragma_cc_opt_restore);  \
    cpp_register_pragma (PFILE, 0, "CC_WRITABLE_STRINGS", darwin_pragma_cc_writable_strings);  \
    cpp_register_pragma (PFILE, 0, "CC_NON_WRITABLE_STRINGS", darwin_pragma_cc_non_writable_strings);  \
    /* APPLE LOCAL end temporary pragmas 2001-07-05 --sts */  \
  } while (0)

extern int flag_coalescing_enabled,
	   flag_coalesce_templates, flag_weak_coalesced_definitions;

/* Coalesced symbols are private extern by default.  This EXPERIMENTAL
   flag will make them global instead.  */
extern int flag_export_coalesced;

#define COALESCING_ENABLED_P()  (flag_coalescing_enabled && MACHOPIC_INDIRECT)

#define COALESCING_TEMPLATES_P(DECL)				\
        (COALESCING_ENABLED_P () && flag_coalesce_templates)

#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false

#define MARK_TEMPLATE_COALESCED(DECL)					\
  do {									\
    if (COALESCING_TEMPLATES_P (DECL)) {				\
      int explicit = TREE_PUBLIC (DECL)					\
	&& (DECL_EXPLICIT_INSTANTIATION (DECL)				\
	    /* Or an explicitly instantiated function.  */		\
	    || (TREE_CODE (DECL) == FUNCTION_DECL			\
		&& DECL_INTERFACE_KNOWN (DECL)				\
		&& DECL_NOT_REALLY_EXTERN (DECL))			\
	    /* Or a non-common VAR_DECL.  */				\
	    || (TREE_CODE (DECL) == VAR_DECL && ! DECL_COMMON (DECL)));	\
      if (!explicit							\
	  || /*it IS explicit, but*/ !flag_weak_coalesced_definitions)	\
        MAKE_DECL_COALESCED (DECL);					\
    }							\
  } while (0)

#undef TARGET_ASM_NAMED_SECTION
#define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
#undef TARGET_SECTION_TYPE_FLAGS
#define TARGET_SECTION_TYPE_FLAGS darwin_section_type_flags

#define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
  do {                                                          \
    c_register_pragma (0, "mark", darwin_pragma_ignore);        \
    c_register_pragma (0, "options", darwin_pragma_options);    \
    c_register_pragma (0, "segment", darwin_pragma_ignore);     \
    c_register_pragma (0, "unused", darwin_pragma_unused);      \
  } while (0)

/* APPLE LOCAL insert assembly ".abort" directive on fatal error   */
#define EXIT_FROM_FATAL_DIAGNOSTIC(status) abort_assembly_and_exit (status)
extern void abort_assembly_and_exit (int status) ATTRIBUTE_NORETURN;

/* APPLE LOCAL begin Macintosh alignment 2002-2-13 --ff */
#ifdef RS6000_VECTOR_ALIGNMENT
/* When adjusting (lowering) the alignment of fields when in the
   mac68k alignment mode, the 128-bit alignment of vectors *MUST*
   be preserved.  */
#define PEG_ALIGN_FOR_MAC68K(DESIRED)           \
        ((TARGET_ALTIVEC && (DESIRED) == RS6000_VECTOR_ALIGNMENT) \
         ? RS6000_VECTOR_ALIGNMENT              \
         : MIN ((DESIRED), 16))
#else
#define PEG_ALIGN_FOR_MAC68K(DESIRED)   MIN ((DESIRED), 16)
#endif 
/* APPLE LOCAL end Macintosh alignment 2002-2-13 --ff */

/* APPLE LOCAL begin double destructor 20020214 --turly  */
/* Handle __attribute__((apple_kext_compatibility)).  This shrinks the
   vtable for all classes with this attribute (and their descendants)
   back to 2.95 dimensions.  It causes only the deleting destructor to
   be emitted, which means that such objects CANNOT be allocated on
   the stack or as globals.  Luckily, this fits in with the Darwin
   kext model. */
#define SUBTARGET_ATTRIBUTE_TABLE					      \
  /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */  \
  { "apple_kext_compatibility", 0, 0, 0, 1, 0, darwin_handle_odd_attribute },

/* APPLE KEXT stuff -- only applies with pure static C++ code.  */
/* NB: Can't use flag_apple_kext as it's in the C++ FE, and this macro
   is used in the back end for the above __attribute__ handler.  */
#define POSSIBLY_COMPILING_APPLE_KEXT_P()		\
	(! MACHOPIC_INDIRECT && c_dialect_cxx())

/* Need a mechanism to tell whether a C++ operator delete is empty so
   we overload TREE_SIDE_EFFECTS here (it is unused for FUNCTION_DECLS.)
   Fromage, c'est moi!  */
#define CHECK_TRIVIAL_FUNCTION(DECL)					\
    do {								\
      const char *_name = IDENTIFIER_POINTER (DECL_NAME (DECL));	\
      if (POSSIBLY_COMPILING_APPLE_KEXT_P () && DECL_SAVED_TREE (DECL)	\
	  && strstr (_name, "operator delete")				\
	  && TREE_CODE (DECL_SAVED_TREE (DECL)) == COMPOUND_STMT	\
	  && compound_body_is_empty_p (					\
				COMPOUND_BODY (DECL_SAVED_TREE (DECL))))\
	  TREE_SIDE_EFFECTS (DECL) = 1;					\
    } while (0)

/* gcc3 initialises the vptr field of all objects so that it points at the
   first virtual function slot, NOT the base address of the vtable proper.
   This is different from gcc2.95 which always initialised the vptr to
   point at the base address of the vtable.  The difference here is 8 bytes.
   So, for 2.95 compatibility, we need to:

     (1) subtract 8 from the vptr initialiser, and
     (2) add 2 to every vfunc index.  (2 * 4 == 8.)

   This is getting ever cheesier.  */

#define VPTR_INITIALIZER_ADJUSTMENT	8
#define ADJUST_VTABLE_INDEX(IDX, VTBL)					\
    do {								\
      if (POSSIBLY_COMPILING_APPLE_KEXT_P () && flag_apple_kext)	\
	(IDX) = fold (build (PLUS_EXPR, TREE_TYPE (IDX), IDX, size_int (2))); \
    } while (0)
/* APPLE LOCAL end double destructor 20020214 --turly  */

/* APPLE LOCAL begin zerofill 20020218 --turly  */
/* This keeps uninitialized data from bloating the data when -fno-common.
   Radar 2863107.  */
#define ASM_OUTPUT_ZEROFILL(FILE, NAME, SIZE, ALIGNMENT)		    \
  do {									    \
    fputs (".zerofill __DATA, __common, ", (FILE));			    \
    assemble_name ((FILE), (NAME));					    \
    fprintf ((FILE), ", " HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT) (SIZE)); \
    fprintf ((FILE), ", " HOST_WIDE_INT_PRINT_DEC "\n",			    \
	     (HOST_WIDE_INT) (ALIGNMENT));				    \
    in_section = no_section;						    \
  } while (0)
/* APPLE LOCAL end zerofill 20020218 --turly  */

#undef ASM_APP_ON
#define ASM_APP_ON ""
#undef ASM_APP_OFF
#define ASM_APP_OFF ""

extern const char *machopic_non_lazy_ptr_name PARAMS ((const char *));

void darwin_register_frameworks (int);
#define TARGET_EXTRA_INCLUDES darwin_register_frameworks

void add_framework_path (char *);
#define TARGET_OPTF add_framework_path

#define TARGET_HAS_F_SETLKW

/* Darwin before 7.0 does not have C99 functions.   */
#ifndef TARGET_C99_FUNCTIONS
#define TARGET_C99_FUNCTIONS 0
#endif

#endif /* CONFIG_DARWIN_H */