OpenBSD configuration, alpha

[Marc Espie <espie at tetto dot liafa dot jussieu dot fr>]

The only noticeable thing is that we don't have (yet) dynamic libraries
on alpha.

Also re: the main openbsd configuration files, some details are not 
triggered by the currently submitted configurations. I do have the 
remaining architectures on my hd, but Jeff Law wants to concentrate
on the archs that are fairly stable right now.

Tue Feb 16 18:50:59 CET 1999	Marc Espie <espie@cvs.openbsd.org>
	* config/alpha/openbsd.h: new file
	* config/alpha/xm-openbsd.h: new file

/* $OpenBSD: openbsd.h,v 1.11 1999/02/16 17:20:55 espie Exp $ */

/* We settle for little endian for now */
#define TARGET_ENDIAN_DEFAULT 0

#include <alpha/alpha.h>

#define OBSD_NO_DYNAMIC_LIBRARIES
#define OBSD_HAS_DECLARE_FUNCTION_NAME
#define OBSD_HAS_DECLARE_FUNCTION_SIZE
#define OBSD_HAS_DECLARE_OBJECT

/* alpha ecoff supports only weak aliases, see below. */
#define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)

#include <openbsd.h>

/* Controlling the compilation driver
   ---------------------------------- */
/* alpha needs __start */
#undef LINK_SPEC
#define LINK_SPEC \
  "%{!nostdlib:%{!r*:%{!e*:-e __start}}} -dc -dp %{assert*}"

/* run-time target specifications */
#define CPP_PREDEFINES "-D__unix__ -D__ANSI_COMPAT -Asystem(unix) \
-D__OpenBSD__ -D__alpha__ -D__alpha"

/* Layout of source language data types
   ------------------------------------ */
/* this must agree with <machine/ansi.h> */
#undef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"

#undef WCHAR_TYPE
#define WCHAR_TYPE "int"

#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32


#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

#define LOCAL_LABEL_PREFIX	"."

/* We don't have an init section yet */
#undef HAS_INIT_SECTION

/* collect2 support (assembler format: macros for initialization) 
   -------------------------------------------------------------- */
/* Don't tell collect2 we use COFF as we don't have (yet ?) a dynamic ld
   library with the proper functions to handle this -> collect2 will
   default to using nm. */
#undef OBJECT_FORMAT_COFF
#undef EXTENDED_COFF

/* Assembler format: exception region output 
   ----------------------------------------- */
/* all configurations that don't use elf must be explicit about not using
   dwarf unwind information. egcs doesn't try too hard to check internal
   configuration files...  */
#ifdef INCOMING_RETURN_ADDR_RTX
#undef DWARF2_UNWIND_INFO
#define DWARF2_UNWIND_INFO 0
#endif

/* Assembler format: file framework 
   -------------------------------- */
/* taken from alpha/osf.h. This used to be common to all alpha
   configurations, but elf has departed from it.
   Check alpha/alpha.h, alpha/osf.h for it when egcs is upgraded.  */
#ifndef ASM_FILE_START
#define ASM_FILE_START(FILE)					\
{								\
  alpha_write_verstamp (FILE);					\
  fprintf (FILE, "\t.set noreorder\n");				\
  fprintf (FILE, "\t.set volatile\n");                          \
  fprintf (FILE, "\t.set noat\n");				\
  if (TARGET_SUPPORT_ARCH)					\
    fprintf (FILE, "\t.arch %s\n",				\
             alpha_cpu == PROCESSOR_EV6 ? "ev6"			\
	     : (alpha_cpu == PROCESSOR_EV5			\
		? (TARGET_MAX ? "pca56" : TARGET_BWX ? "ev56" : "ev5") \
		: "ev4"));					\
								\
  ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename);	\
}
#endif

/* Assembler format: label output
   ------------------------------ */
#define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE)	\
 do {						\
  fputs ("\t.weakext\t", FILE);			\
  assemble_name (FILE, NAME);			\
  if (VALUE)					\
    {						\
      fputs (" , ", FILE);			\
      assemble_name (FILE, VALUE);		\
    }						\
  fputc ('\n', FILE);				\
 } while (0)

#include <xm-openbsd.h>
#include <alpha/xm-alpha.h>