/* Configuration for an i386 running MS-DOS with DJGPP.
   Copyright (C) 1997, 1998, 1999 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.  */


#include "dbxcoff.h"

/* Don't assume anything about the header files. */
#define NO_IMPLICIT_EXTERN_C

#define HANDLE_SYSV_PRAGMA

/* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop).  */
#define HANDLE_PRAGMA_PACK_PUSH_POP 1

#define YES_UNDERSCORES

#include "i386/gas.h"

/* If defined, a C expression whose value is a string containing the
   assembler operation to identify the following data as
   uninitialized global data.  If not defined, and neither
   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
   uninitialized global data will be output in the data section if
   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
   used.  */
#undef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP "\t.section\t.bss"
 
/* Enable alias attribute support.  */
#ifndef SET_ASM_OP
#define SET_ASM_OP "\t.set"
#endif

#ifdef CPP_PREDEFINES
#undef CPP_PREDEFINES
#endif
#define CPP_PREDEFINES "-Dunix -Di386 -DGO32 -DDJGPP=2 -DMSDOS \
  -Asystem(unix) -Asystem(msdos) -Acpu(i386) -Amachine(i386)"

#undef CPP_SPEC
#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} -imacros %s../include/sys/version.h -remap"

/* We need to override link_command_spec in gcc.c so support -Tdjgpp.djl.
   This cannot be done in LINK_SPECS as that LINK_SPECS is processed
   before library search directories are known by the linker.
   This avoids problems when specs file is not available. An alternate way,
   suggested by Robert Hoehne, is to use SUBTARGET_EXTRA_SPECS instead.
*/ 

#undef LINK_COMMAND_SPEC
#define LINK_COMMAND_SPEC \
"%{!fsyntax-only: \
%{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} \
\t%{r} %{s} %{t} %{u*} %{x} %{z} %{Z}\
\t%{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
\t%{static:} %{L*} %D %o\
\t%{!nostdlib:%{!nodefaultlibs:%G %L %G}}\
\t%{!A:%{!nostdlib:%{!nostartfiles:%E}}}\
\t-Tdjgpp.djl %{T*}}}}}}}\n\
%{!c:%{!M:%{!MM:%{!E:%{!S:stubify %{v} %{o*:%*} %{!o*:a.out} }}}}}"

/* Always just link in 'libc.a'.  */
#undef LIB_SPEC
#define LIB_SPEC "-lc"

/* Pick the right startup code depending on the -pg flag.  */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}"

/* Make sure that gcc will not look for .h files in /usr/local/include 
   unless user explicitly requests it.  */
#undef LOCAL_INCLUDE_DIR

#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS in_ctor, in_dtor

#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS					\
  CTOR_SECTION_FUNCTION						\
  DTOR_SECTION_FUNCTION

#define CTOR_SECTION_FUNCTION					\
void								\
ctor_section ()							\
{								\
  if (in_section != in_ctor)					\
    {								\
      fprintf (asm_out_file, "\t.section .ctor\n");		\
      in_section = in_ctor;					\
    }								\
}

#define DTOR_SECTION_FUNCTION					\
void								\
dtor_section ()							\
{								\
  if (in_section != in_dtor)					\
    {								\
      fprintf (asm_out_file, "\t.section .dtor\n");		\
      in_section = in_dtor;					\
    }								\
}

#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)	\
  do {						\
    ctor_section ();				\
    fprintf (FILE, "%s\t", ASM_LONG);		\
    assemble_name (FILE, NAME);			\
    fprintf (FILE, "\n");			\
  } while (0)

/* Allow (eg) __attribute__((section "locked")) to work */
#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC)\
  do {						\
    fprintf (FILE, "\t.section %s\n", NAME);	\
  } while (0)

#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)	\
  do {						\
    dtor_section ();                   		\
    fprintf (FILE, "%s\t", ASM_LONG);		\
    assemble_name (FILE, NAME);              	\
    fprintf (FILE, "\n");			\
  } while (0)

/* Output at beginning of assembler file.  */
/* The .file command should always begin the output.  */

#undef ASM_FILE_START
#define ASM_FILE_START(FILE)						\
  do {									\
	output_file_directive (FILE, main_input_filename);		\
  } while (0)

/* This is how to output an assembler line
   that says to advance the location counter
   to a multiple of 2**LOG bytes.  */

#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
  if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG)

/* This is hack to provide zero padding in .eh_frame section
   and workaround related problem with AS.EXE. This and related
   patch for gcc/dwarf2out.c should be removed after problem with
   binutils will be fixed (it's fixed in snapshots now but not in 
   release!!!)  */
#undef ASM_OUTPUT_ALIGN_Z
#define ASM_OUTPUT_ALIGN_Z(FILE,LOG) \
  if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d,0\n", LOG)

/* Add command line option -mbnu210 to tell that we're using binutils-2.10  */
#undef MASK_BNU210
#define MASK_BNU210		0x40000000 /* Use weak symbols and  */

#undef SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES 		\
  { "bnu210", MASK_BNU210, "Enable weak symbols and .gnu.linkonce (requires Binutils 2.10)." }, \
  { "no-bnu210", -MASK_BNU210, "Disable weak symbols and .gnu.linkonce." },

/* We can support weak symbols and .gnu.linkonce only with binutils-2.10.
   Therefore let's do it only when -mbnu210 is specified  */
#undef SUPPORTS_WEAK
#define SUPPORTS_WEAK	(target_flags & MASK_BNU210)

/* This is how to tell assembler that a symbol is weak  */ 
#undef ASM_WEAKEN_LABEL
#define ASM_WEAKEN_LABEL(FILE,NAME) \
  do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
       fputc ('\n', FILE); } while (0)

/* This is how to output a global symbol in the BSS section.  */
#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))

/* djgpp has atexit ().  */
#undef HAVE_ATEXIT
#define HAVE_ATEXIT

/* djgpp automatically calls its own version of __main, so don't define one
   in libgcc, nor call one in main().  */
#define HAS_INIT_SECTION

/* I define it here to provide the same name of library also for 
   cross-to-DJGPP compilers (AP)  */
#define LIBSTDCXX "-lstdcxx"

/* Definitions to set wchar_t type to 'unsigned short int' like for CygWin  */
#define WCHAR_UNSIGNED 1
#define WCHAR_TYPE_SIZE 16
#define WCHAR_TYPE "short unsigned int"
