sco5.h

gcc编译工具没有什么特别

	      break;							\
	    default:							\
	      putc ('\\', (FILE));					\
	      putc (escape, (FILE));					\
	      break;							\
	    }								\
        }								\
      fprintf ((FILE), "\"\n");						\
    }									\
  while (0)


#undef ASM_OUTPUT_ASCII
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)				\
do {									\
      register unsigned char *_ascii_bytes = (unsigned char *) (STR);	\
      register unsigned char *limit = _ascii_bytes + (LENGTH);		\
      register unsigned bytes_in_chunk = 0;				\
      for (; _ascii_bytes < limit; _ascii_bytes++)			\
        {								\
	  register unsigned char *p;					\
	  if (bytes_in_chunk >= 64)					\
	    {								\
	      fputc ('\n', (FILE));					\
	      bytes_in_chunk = 0;					\
	    }								\
	  for (p = _ascii_bytes; p < limit && *p != '\0'; p++)		\
	    continue;							\
	  if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT)		\
	    {								\
	      if (bytes_in_chunk > 0)					\
		{							\
		  fputc ('\n', (FILE));					\
		  bytes_in_chunk = 0;					\
		}							\
	      ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);		\
	      _ascii_bytes = p;						\
	    }								\
	  else								\
	    {								\
	      if (bytes_in_chunk == 0)					\
		fprintf ((FILE), "%s\t", ASM_BYTE_OP);			\
	      else							\
		fputc (',', (FILE));					\
	      fprintf ((FILE), "0x%02x", *_ascii_bytes);		\
	      bytes_in_chunk += 5;					\
	    }								\
	}								\
      if (bytes_in_chunk > 0)						\
        fprintf ((FILE), "\n");						\
} while (0) 

/* Must use data section for relocatable constants when pic.  */
#undef SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(MODE,RTX)					\
{									\
  if (TARGET_ELF) {							\
    if (flag_pic && symbolic_operand (RTX))				\
      data_section ();							\
    else								\
      const_section ();							\
  } else								\
    readonly_data_section();						\
}

#undef ASM_OUTPUT_CASE_LABEL
#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE)		\
do {									\
  if (TARGET_ELF)							\
    ASM_OUTPUT_ALIGN ((FILE), 2);					\
  ASM_OUTPUT_INTERNAL_LABEL((FILE),(PREFIX),(NUM));			\
} while (0)


#undef ASM_OUTPUT_CONSTRUCTOR
#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)				\
do {									\
  if (TARGET_ELF) {							\
     ctors_section ();							\
     fprintf (FILE, "%s\t ", INT_ASM_OP);				\
     assemble_name (FILE, NAME);					\
     fprintf (FILE, "\n");						\
  } else {								\
    init_section ();							\
    fprintf (FILE, "\tpushl $");					\
    assemble_name (FILE, NAME);						\
    fprintf (FILE, "\n"); }						\
  } while (0)

#undef ASM_OUTPUT_DESTRUCTOR
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)				\
do {									\
  if (TARGET_ELF) {							\
    dtors_section ();                   				\
    fprintf (FILE, "%s\t ", INT_ASM_OP);				\
    assemble_name (FILE, NAME);              				\
    fprintf (FILE, "\n");						\
  } else {								\
    fini_section ();                   					\
    fprintf (FILE, "%s\t ", ASM_LONG);					\
    assemble_name (FILE, NAME);              				\
    fprintf (FILE, "\n"); }						\
  } while (0)


#undef ASM_OUTPUT_IDENT
#define ASM_OUTPUT_IDENT(FILE, NAME) \
  fprintf (FILE, "%s\t\"%s\"\n", IDENT_ASM_OP, NAME);

#undef ASM_GLOBALIZE_LABEL
#define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
  (fprintf ((FILE), "%s ", GLOBAL_ASM_OP), assemble_name (FILE, NAME), fputs ("\n", FILE))

#undef ASM_OUTPUT_EXTERNAL_LIBCALL
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)				\
  if (TARGET_ELF) ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))

#undef ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)			\
  fprintf (FILE, ".%s%d:\n", PREFIX, NUM)

/* The prefix to add to user-visible assembler symbols. */

#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX ""

/* 
 * Compensate for the difference between ELF and COFF assembler syntax.
 * Otherwise, this is cribbed from ../svr4.h.
 * We rename 'gcc_except_table' to the shorter name in preparation
 * for the day when we're ready to do DWARF2 eh unwinding under COFF 
 */
#undef ASM_OUTPUT_SECTION_NAME
#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
do {									\
  static struct section_info                                            \
    {                                                                   \
      struct section_info *next;                                        \
      char *name;                                                       \
      enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type;                \
    } *sections;                                                        \
  struct section_info *s;                                               \
  char *mode;                                                           \
  enum sect_enum type;                                                  \
  char *sname = NAME ;							\
  if (strcmp(NAME, ".gcc_except_table") == 0) sname = ".gccexc" ;	\
                                                                        \
  for (s = sections; s; s = s->next)                                    \
    if (!strcmp (NAME, s->name))                                        \
      break;                                                            \
                                                                        \
  if (DECL && TREE_CODE (DECL) == FUNCTION_DECL)                        \
    type = SECT_EXEC, mode = (TARGET_ELF) ? "ax" : "x" ;                \
  else if (DECL && DECL_READONLY_SECTION (DECL, RELOC))                 \
    type = SECT_RO, mode = "a";                                         \
  else                                                                  \
    type = SECT_RW, mode = (TARGET_ELF) ? "aw" : "w" ;                  \
                                                                        \
  if (s == 0)                                                           \
    {                                                                   \
      s = (struct section_info *) xmalloc (sizeof (struct section_info));  \
      s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME));         \
      strcpy (s->name, NAME);                                           \
      s->type = type;                                                   \
      s->next = sections;                                               \
      sections = s;                                                     \
      fprintf (FILE, ".section\t%s,\"%s\"%s\n", sname, mode,		\
		(TARGET_ELF) ? ",@progbits" : "" );    			\
    }                                                                   \
  else                                                                  \
    {                                                                   \
      if (DECL && s->type != type)                                      \
        error_with_decl (DECL, "%s causes a section type conflict");    \
                                                                        \
      fprintf (FILE, ".section\t%s\n", sname);                          \
    }                                                                   \
} while (0)

#undef ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE,SIZE) \
do {									\
  if (TARGET_ELF)							\
    fprintf (FILE, "%s\t%u\n", SKIP_ASM_OP, (SIZE));			\
  else									\
    fprintf ((FILE), "%s\t.,.+%u\n", SET_ASM_OP, (SIZE));		\
} while (0)


#undef CTOR_LIST_BEGIN
#define CTOR_LIST_BEGIN							\
do {									\
  asm (CTORS_SECTION_ASM_OP);						\
  if (TARGET_ELF)							\
    STATIC func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) };		\
  else									\
    asm ("pushl $0");							\
} while (0)

#undef CTOR_LIST_END
#define CTOR_LIST_END							\
do {									\
  if (TARGET_ELF) {							\
    asm (CTORS_SECTION_ASM_OP);						\
    STATIC func_ptr __CTOR_LIST__[1] = { (func_ptr) (0) };		\
  } else {								\
    CTOR_LIST_BEGIN;							\
  }									\
} while (0)

#undef DBX_BLOCKS_FUNCTION_RELATIVE
#define DBX_BLOCKS_FUNCTION_RELATIVE 1

#undef DBX_FUNCTION_FIRST
#define DBX_FUNCTION_FIRST 1

#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(n)						\
((TARGET_ELF) ?								\
 ((n) == 0 ? 0 								\
  : (n) == 1 ? 2 							\
  : (n) == 2 ? 1 							\
  : (n) == 3 ? 3 							\
  : (n) == 4 ? 6 							\
  : (n) == 5 ? 7 							\
  : (n) == 6 ? 5 							\
  : (n) == 7 ? 4 							\
  : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n)+3 		\
  : (-1))								\
 :									\
 ((n) == 0 ? 0 : 							\
  (n) == 1 ? 2 : 							\
  (n) == 2 ? 1 : 							\
  (n) == 3 ? 3 : 							\
  (n) == 4 ? 6 : 							\
  (n) == 5 ? 7 : 							\
  (n) == 6 ? 4 : 							\
  (n) == 7 ? 5 : 							\
  (n) + 4))

#undef DWARF_DEBUGGING_INFO
#undef SDB_DEBUGGING_INFO
#undef DBX_DEBUGGING_INFO
#undef PREFERRED_DEBUGGING_TYPE

#define DWARF_DEBUGGING_INFO 1
#define SDB_DEBUGGING_INFO   1
#define DBX_DEBUGGING_INFO   1
#define PREFERRED_DEBUGGING_TYPE					\
  ((TARGET_ELF) ? DWARF_DEBUG: SDB_DEBUG)

#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS in_const, in_init, in_fini, in_ctors, in_dtors

#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS						\
  CONST_SECTION_FUNCTION						\
  INIT_SECTION_FUNCTION							\
  FINI_SECTION_FUNCTION							\
  CTORS_SECTION_FUNCTION						\
  DTORS_SECTION_FUNCTION

#undef CONST_SECTION_FUNCTION
#define CONST_SECTION_FUNCTION						\
void									\
const_section ()							\
{									\
  extern void text_section();						\
  if (!USE_CONST_SECTION)						\
    text_section();							\
  else if (in_section != in_const)					\
    {									\
      fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP);		\
      in_section = in_const;						\
    }									\
}

#undef FINI_SECTION_FUNCTION
#define FINI_SECTION_FUNCTION						\
void									\
fini_section ()								\
{									\
  if ((!TARGET_ELF) && in_section != in_fini)				\
    {									\
      fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);		\
      in_section = in_fini;						\
    }									\
}

#undef INIT_SECTION_FUNCTION
#define INIT_SECTION_FUNCTION						\
void									\
init_section ()								\
{									\
  if ((!TARGET_ELF) && in_section != in_init)				\
    {									\
      fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);		\
      in_section = in_init;						\
    }									\
}

#undef CTORS_SECTION_FUNCTION
#define CTORS_SECTION_FUNCTION						\
void									\
ctors_section ()							\
{									\
  if (in_section != in_ctors)						\
    {									\
      fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);		\
      in_section = in_ctors;						\
    }									\
}

#undef DTORS_SECTION_FUNCTION
#define DTORS_SECTION_FUNCTION						\
void									\
dtors_section ()							\
{									\
  if (in_section != in_dtors)						\
    {									\
      fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);		\
      in_section = in_dtors;						\
    }									\
}

#undef FRAME_POINTER_REQUIRED
#define FRAME_POINTER_REQUIRED						\