nextstep.h

gcc-2.95.3 Linux下最常用的C编译器

/* Operating system specific defines to be used when targeting GCC
   for NeXTSTEP.
   Copyright (C) 1989, 90-93, 1996, 1997 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC 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.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Use new NeXT include file search path.
   In a cross compiler with NeXT as target, don't expect
   the host to use Next's directory scheme.  */

#ifndef CROSS_COMPILE
#undef	INCLUDE_DEFAULTS
#define INCLUDE_DEFAULTS				\
  {							\
    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },		\
    { LOCAL_INCLUDE_DIR, 0, 0, 1 },			\
    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1 },		\
    { GCC_INCLUDE_DIR, "GCC", 0, 0 },			\
    /* These are for fixincludes-fixed ansi/bsd headers	\
       which wouldn't be found otherwise.		\
       (The use of string catenation here is OK since	\
	NeXT's native compiler is derived from GCC.) */	\
    { GCC_INCLUDE_DIR "/ansi", 0, 0, 0 },		\
    { GCC_INCLUDE_DIR "/bsd", 0, 0, 0 },		\
    { "/NextDeveloper/Headers", 0, 0, 0 },		\
    { "/NextDeveloper/Headers/ansi", 0, 0, 0 },		\
    { "/NextDeveloper/Headers/bsd", 0, 0, 0 },		\
    { "/LocalDeveloper/Headers", 0, 0, 0 },		\
    { "/LocalDeveloper/Headers/ansi", 0, 0, 0 },	\
    { "/LocalDeveloper/Headers/bsd", 0, 0, 0 },		\
    { "/NextDeveloper/2.0CompatibleHeaders", 0, 0, 0 },	\
    { STANDARD_INCLUDE_DIR, 0, 0, 0 },                  \
    { "/usr/include/bsd", 0, 0, 0 },			\
    { 0, 0, 0, 0 }				       	\
  }
#else /* CROSS_COMPILE */
#undef	INCLUDE_DEFAULTS
#define INCLUDE_DEFAULTS				\
  {							\
    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },		\
    { GPLUSPLUS_INCLUDE_DIR, 0, 1, 1 },			\
    { LOCAL_INCLUDE_DIR, 0, 0, 1 },			\
    { GCC_INCLUDE_DIR, "GCC", 0, 0 },			\
    { GCC_INCLUDE_DIR "/ansi", 0, 0, 0 },		\
    { GCC_INCLUDE_DIR "/bsd", 0, 0, 0 },		\
    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1 },		\
    { TOOL_INCLUDE_DIR "/ansi", 0, 0, 0 },		\
    { TOOL_INCLUDE_DIR "/bsd", 0, 0, 0 },		\
    { STANDARD_INCLUDE_DIR, 0, 0, 0 },			\
    { "/usr/include/bsd", 0, 0, 0 },			\
    { 0, 0, 0, 0 }					\
  }
#endif /* CROSS_COMPILE */

#undef	EXTRA_FORMAT_FUNCTIONS
#define EXTRA_FORMAT_FUNCTIONS \
      "NXPrintf",	FALSE,	2,	FALSE,	\
      "NXScanf",	TRUE,	2,	FALSE,	\
      "NXVPrintf",	FALSE,	2,	TRUE,	\
      "NXVScanf",	TRUE,	2,	TRUE,	\
      "DPSPrintf",	FALSE,	2,	FALSE,	\
      "bsd_sprintf",	FALSE,	2,	FALSE,	\
      "bsd_vsprintf",	FALSE,	2,	TRUE,

/* Make -fnext-runtime the default.  */

#define NEXT_OBJC_RUNTIME

/* We have atexit.  */

#define HAVE_ATEXIT

/* Enable recent gcc to compile under the old gcc in Next release 1.0.  */

#define __inline inline

/* wchar_t is unsigned short */

#undef	WCHAR_TYPE
#define WCHAR_TYPE "short unsigned int"
#undef	WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE (BITS_PER_WORD / 2)

/* 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

/* 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, "segalign") ? 1 :		\
   !strcmp (STR, "seg1addr") ? 1 :		\
   !strcmp (STR, "segaddr") ? 2 :		\
   !strcmp (STR, "sectobjectsymbols") ? 2 :	\
   !strcmp (STR, "segprot") ? 3 :		\
   !strcmp (STR, "sectcreate") ? 3 :		\
   !strcmp (STR, "sectalign") ? 3 :		\
   !strcmp (STR, "segcreate") ? 3 :		\
   !strcmp (STR, "sectorder") ? 3 :		\
   !strcmp (STR, "siff-mask") ? 1 :		\
   !strcmp (STR, "siff-filter") ? 1 :		\
   !strcmp (STR, "siff-warning") ? 1 :		\
   !strcmp (STR, "arch") ? 1 :			\
   !strcmp (STR, "pagezero_size") ? 1 :		\
   0)

#undef	WORD_SWITCH
#define WORD_SWITCH(STR)			\
  (WORD_SWITCH_TAKES_ARG (STR)			\
   || !strcmp (STR, "bsd")			\
   || !strcmp (STR, "object")			\
   || !strcmp (STR, "ObjC")			\
   || !strcmp (STR, "all_load"))

/* Machine dependent ccp options.  */

#undef	CPP_SPEC
#define CPP_SPEC "%{!traditional: -D__STDC__}            \
                  %{posixstrict:-D_POSIX_SOURCE}         \
                  %{!posixstrict:%{bsd:-D__STRICT_BSD__} \
                  %{posix:-D_POSIX_SOURCE}               \
                  %{!ansi:-D_NEXT_SOURCE}}               \
                  %{MD:-MD %M} %{MMD:-MMD %M}"

/* Machine dependent ld options.  */

#undef	LINK_SPEC
#define LINK_SPEC "%{Z} %{M} \
%{execute*} %{preload*} %{fvmlib*} \
%{segalign*} %{seg1addr*} %{segaddr*} %{segprot*} \
%{pagezero_size*} \
%{seglinkedit*} %{noseglinkedit*} \
%{sectcreate*} %{sectalign*} %{sectobjectsymbols}\
%{segcreate*} %{Mach*} %{whyload} %{w} \
%{sectorder*} %{whatsloaded} %{ObjC} %{all_load} %{object}"

/* Machine dependent libraries.  */

#undef	LIB_SPEC
#define LIB_SPEC "%{!posix*:-lsys_s} %{posix*:-lposix}"

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

#undef	STARTFILE_SPEC
#define STARTFILE_SPEC  \
    "%{!posix*:%{pg:-lgcrt0.o}%{!pg: \
     %{p:%e-p profiling is no longer supported.  Use -pg instead.} \
     %{!p:-lcrt0.o}}}\
     %{posix*:%{pg:-lgposixcrt0.o}%{!pg: \
     %{p:%e-p profiling is no longer supported.  Use -pg instead.} \
     %{!p:-lposixcrt0.o}}} \
     -lcrtbegin.o"

#undef	ENDFILE_SPEC
#define ENDFILE_SPEC \
    "-lcrtend.o"

/* Allow #sscs (but don't do anything). */

#define SCCS_DIRECTIVE

/* We use Dbx symbol format.  */

#undef	SDB_DEBUGGING_INFO
#undef	XCOFF_DEBUGGING_INFO
#define DBX_DEBUGGING_INFO

/* This saves a fair amount of space. */

#undef	DBX_CONTIN_LENGTH
#define DBX_CONTIN_LENGTH 0

/* These screw up NeXT's gdb at the moment, so don't use them. */

#undef	DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
#define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(FILE, FILENAME)

/* These come from bsd386.h, but are specific to sequent, so make sure
   they don't bite us.  */

#undef	DBX_NO_XREFS
#undef	DBX_CONTIN_LENGTH

/* 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)			\
  fprintf (FILE,							\
	   "\t.text\n\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n",		\
	   "" , N_SO)

/* Define our object format type for crtstuff.c */
#define OBJECT_FORMAT_MACHO

/* Don't use .gcc_compiled symbols to communicate with GDB;
   They interfere with numerically sorted symbol lists. */

#undef	ASM_IDENTIFY_GCC
#define ASM_IDENTIFY_GCC(asm_out_file)
#undef	INIT_SECTION_ASM_OP
#define INIT_SECTION_ASM_OP
#undef	INVOKE__main

#undef	ASM_OUTPUT_CONSTRUCTOR
#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                       \
  do { constructor_section ();                                  \
       ASM_OUTPUT_ALIGN (FILE, 1);                              \
       fprintf (FILE, "\t.long ");                              \
       assemble_name (FILE, NAME);                              \
       fprintf (FILE, "\n");                                    \
       fprintf (FILE, ".reference .constructors_used\n");       \
      } while (0)

#undef	ASM_OUTPUT_DESTRUCTOR
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)                        \
  do { destructor_section ();                                   \
       ASM_OUTPUT_ALIGN (FILE, 1);                              \
       fprintf (FILE, "\t.long ");                              \
       assemble_name (FILE, NAME);                              \
       fprintf (FILE, "\n");                                    \
       fprintf (FILE, ".reference .destructors_used\n");        \
      } while (0)

#define EH_FRAME_SECTION_ASM_OP ".section __TEXT,__eh_frame,regular"

/* Don't output a .file directive.  That is only used by the assembler for
   error reporting.  */
#undef	ASM_FILE_START
#define ASM_FILE_START(FILE)

#undef	ASM_FILE_END
#define ASM_FILE_END(FILE)					\
  do {								\
    extern char *language_string;				\
    if (strcmp (language_string, "GNU C++") == 0)		\
      {								\
	constructor_section ();					\
	destructor_section ();					\
	ASM_OUTPUT_ALIGN (FILE, 1);				\
      }								\
  } while (0)

/* How to parse #pragma's */

#undef	HANDLE_PRAGMA
#define HANDLE_PRAGMA(GETC, UNGETC, NAME) handle_pragma (GETC, UNGETC, NAME)
extern int handle_pragma ();

/* Give methods pretty symbol names on NeXT. */

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

#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX "_"

/* 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 { if (NAME[0] == '+' || NAME[0] == '-') fprintf (FILE, "\"%s\"", NAME); \
       else if (!strncmp (NAME, "_OBJC_", 6)) fprintf (FILE, "L%s", NAME);   \
       else if (!strncmp (NAME, ".objc_class_name_", 17))		\
	 fprintf (FILE, "%s", NAME);					\
       else asm_fprintf (FILE, "%U%s", NAME); } while (0)

#undef	ALIGN_ASM_OP
#define ALIGN_ASM_OP		".align"

#undef	ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
  if ((LOG) != 0)			\