sco.h

GUN开源阻止下的编译器GCC

/* Definitions for Intel 386 running SCO Unix System V.
   Copyright (C) 1988, 1992, 1994, 1995 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.  */

/* Mostly it's like AT&T Unix System V. */

#include "i386/sysv3.h"

/* By default, target has a 80387, uses IEEE compatible arithmetic,
   and returns float values in the 387, ie,
   (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387)

   SCO's software emulation of a 387 fails to handle the `fucomp'
   opcode.  fucomp is only used when generating IEEE compliant code.
   So don't make TARGET_IEEE_FP default for SCO. */

#undef TARGET_DEFAULT
#define TARGET_DEFAULT 0201

/* Let's guess that the SCO software FPU emulator can't handle
   80-bit XFmode insns, so don't generate them.  */
#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64

/* Use crt1.o as a startup file and crtn.o as a closing file.  */

#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
 "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"

#define ENDFILE_SPEC "crtend.o%s crtn.o%s"

/* Library spec, including SCO international language support. */

#undef LIB_SPEC
#define LIB_SPEC \
 "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} %{scointl:libintl.a%s} -lc"

/* Specify predefined symbols in preprocessor.  */

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP -Asystem(unix) -Asystem(svr3) -Acpu(i386) -Amachine(i386)"

#undef CPP_SPEC
#define CPP_SPEC "%{scointl:-DM_INTERNAT}"

/* This spec is used for telling cpp whether char is signed or not.  */

#undef SIGNED_CHAR_SPEC
#if DEFAULT_SIGNED_CHAR
#define SIGNED_CHAR_SPEC \
 "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
#else
#define SIGNED_CHAR_SPEC \
 "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
#endif

/* Use atexit for static destructors, instead of defining
   our own exit function.  */
#define HAVE_ATEXIT

/* Specify the size_t type.  */
#define SIZE_TYPE "unsigned int"

#if 0 /* Not yet certain whether this is needed.  */
/* If no 387, use the general regs to return floating values,
   since this system does not emulate the 80387.  */

#undef VALUE_REGNO
#define VALUE_REGNO(MODE) \
  ((TARGET_80387
     && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)
   ? FIRST_FLOAT_REG : 0)

#undef HARD_REGNO_MODE_OK
#define HARD_REGNO_MODE_OK(REGNO, MODE)					  \
  ((REGNO) < 2 ? 1							  \
   : (REGNO) < 4 ? 1							  \
   : FP_REGNO_P (REGNO) ? ((GET_MODE_CLASS (MODE) == MODE_FLOAT		  \
                          || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
                         && TARGET_80387				  \
                         && GET_MODE_UNIT_SIZE (MODE) <= 8)		  \
   : (MODE) != QImode)
#endif

/* caller has to pop the extra argument passed to functions that return
   structures. */

#undef RETURN_POPS_ARGS
#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE)   \
  (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0			\
   : (TARGET_RTD						\
      && (TYPE_ARG_TYPES (FUNTYPE) == 0				\
	  || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE)))	\
	      == void_type_node))) ? (SIZE)			\
   : 0)
/* On other 386 systems, the last line looks like this:
   : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0)  */

/* Handle #pragma pack. */
#define HANDLE_SYSV_PRAGMA