remove gc

1 files changed, 0 insertions, 1986 deletions

diff --git a/gc/include/private/gcconfig.h b/gc/include/private/gcconfig.h
deleted file mode 100644
index c3adaa2..0000000
--- a/gc/include/private/gcconfig.h
+++ /dev/null
@@ -1,1986 +0,0 @@
-/* 
- * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
- * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
- * Copyright (c) 1996 by Silicon Graphics.  All rights reserved.
- * Copyright (c) 2000 by Hewlett-Packard Company.  All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
- 
-#ifndef GCCONFIG_H
-
-# define GCCONFIG_H
-
-/* Machine dependent parameters.  Some tuning parameters can be found	*/
-/* near the top of gc_private.h.					*/
-
-/* Machine specific parts contributed by various people.  See README file. */
-
-/* First a unified test for Linux: */
-# if defined(linux) || defined(__linux__)
-#    define LINUX
-# endif
-
-/* And one for NetBSD: */
-# if defined(__NetBSD__)
-#    define NETBSD
-# endif
-
-/* And one for OpenBSD: */
-# if defined(__OpenBSD__)
-#    define OPENBSD
-# endif
-
-/* And one for FreeBSD: */
-# if defined(__FreeBSD__)
-#    define FREEBSD
-# endif
-
-/* Determine the machine type: */
-# if defined(__XSCALE__)
-#    define ARM32
-#    if !defined(LINUX)
-#      define NOSYS
-#      define mach_type_known
-#    endif
-# endif
-# if defined(sun) && defined(mc68000)
-#    define M68K
-#    define SUNOS4
-#    define mach_type_known
-# endif
-# if defined(hp9000s300)
-#    define M68K
-#    define HP
-#    define mach_type_known
-# endif
-# if defined(OPENBSD) && defined(m68k)
-#    define M68K
-#    define mach_type_known
-# endif
-# if defined(OPENBSD) && defined(__sparc__)
-#    define SPARC
-#    define mach_type_known
-# endif
-# if defined(NETBSD) && defined(m68k)
-#    define M68K
-#    define mach_type_known
-# endif
-# if defined(NETBSD) && defined(__powerpc__)
-#    define POWERPC
-#    define mach_type_known
-# endif
-# if defined(NETBSD) && defined(__arm32__)
-#    define ARM32
-#    define mach_type_known
-# endif
-# if defined(vax)
-#    define VAX
-#    ifdef ultrix
-#	define ULTRIX
-#    else
-#	define BSD
-#    endif
-#    define mach_type_known
-# endif
-# if defined(mips) || defined(__mips) || defined(_mips)
-#    define MIPS
-#    if defined(nec_ews) || defined(_nec_ews)
-#      define EWS4800
-#    endif
-#    if !defined(LINUX) && !defined(EWS4800)
-#      if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
-#	 define ULTRIX
-#      else
-#	 if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
-	    || defined(__SYSTYPE_SVR4__)
-#	   define IRIX5   /* or IRIX 6.X */
-#	 else
-#	   define RISCOS  /* or IRIX 4.X */
-#	 endif
-#      endif
-#    endif /* !LINUX */
-#    if defined(__NetBSD__) && defined(__MIPSEL__)
-#      undef ULTRIX
-#    endif
-#    define mach_type_known
-# endif
-# if defined(DGUX) && (defined(i386) || defined(__i386__))
-#    define I386
-#    ifndef _USING_DGUX
-#    define _USING_DGUX
-#    endif
-#    define mach_type_known
-# endif
-# if defined(sequent) && (defined(i386) || defined(__i386__))
-#    define I386
-#    define SEQUENT
-#    define mach_type_known
-# endif
-# if defined(sun) && (defined(i386) || defined(__i386__))
-#    define I386
-#    define SUNOS5
-#    define mach_type_known
-# endif
-# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
-#    define I386
-#    define OS2
-#    define mach_type_known
-# endif
-# if defined(ibm032)
-#   define RT
-#   define mach_type_known
-# endif
-# if defined(sun) && (defined(sparc) || defined(__sparc))
-#   define SPARC
-    /* Test for SunOS 5.x */
-#     include <errno.h>
-#     ifdef ECHRNG
-#       define SUNOS5
-#     else
-#	define SUNOS4
-#     endif
-#   define mach_type_known
-# endif
-# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
-     && !defined(__OpenBSD__) && !(__NetBSD__)
-#   define SPARC
-#   define DRSNX
-#   define mach_type_known
-# endif
-# if defined(_IBMR2)
-#   define RS6000
-#   define mach_type_known
-# endif
-# if defined(__NetBSD__) && defined(__sparc__)
-#   define SPARC
-#   define mach_type_known
-# endif
-# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
-	/* The above test may need refinement	*/
-#   define I386
-#   if defined(_SCO_ELF)
-#     define SCO_ELF
-#   else
-#     define SCO
-#   endif
-#   define mach_type_known
-# endif
-# if defined(_AUX_SOURCE)
-#   define M68K
-#   define SYSV
-#   define mach_type_known
-# endif
-# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
-     || defined(hppa) || defined(__hppa__)
-#   define HP_PA
-#   ifndef LINUX
-#     define HPUX
-#   endif
-#   define mach_type_known
-# endif
-# if defined(__ia64) && defined(_HPUX_SOURCE)
-#   define IA64
-#   define HPUX
-#   define mach_type_known
-# endif
-# if defined(__BEOS__) && defined(_X86_)
-#    define I386
-#    define BEOS
-#    define mach_type_known
-# endif
-# if defined(LINUX) && (defined(i386) || defined(__i386__))
-#    define I386
-#    define mach_type_known
-# endif
-# if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
-#    define IA64
-#    define mach_type_known
-# endif
-# if defined(LINUX) && defined(__arm__)
-#    define ARM32
-#    define mach_type_known
-# endif
-# if defined(LINUX) && (defined(powerpc) || defined(__powerpc__))
-#    define POWERPC
-#    define mach_type_known
-# endif
-# if defined(LINUX) && defined(__mc68000__)
-#    define M68K
-#    define mach_type_known
-# endif
-# if defined(LINUX) && (defined(sparc) || defined(__sparc__))
-#    define SPARC
-#    define mach_type_known
-# endif
-# if defined(LINUX) && defined(__arm__)
-#    define ARM32
-#    define mach_type_known
-# endif
-# if defined(LINUX) && defined(__sh__)
-#    define SH
-#    define mach_type_known
-# endif
-# if defined(__alpha) || defined(__alpha__)
-#   define ALPHA
-#   if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)
-#     define OSF1	/* a.k.a Digital Unix */
-#   endif
-#   define mach_type_known
-# endif
-# if defined(_AMIGA) && !defined(AMIGA)
-#   define AMIGA
-# endif
-# ifdef AMIGA 
-#   define M68K
-#   define mach_type_known
-# endif
-# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
-#   define M68K
-#   define MACOS
-#   define mach_type_known
-# endif
-# if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)
-#   define POWERPC
-#   define MACOS
-#   define mach_type_known
-# endif
-# if defined(macosx) || \
-     defined(__APPLE__) && defined(__MACH__) && defined(__ppc__)
-#    define MACOSX
-#    define POWERPC
-#    define mach_type_known
-# endif
-# if defined(__APPLE__) && defined(__MACH__) && defined(__i386__)
-#    define MACOSX
-#    define I386
-     --> Not really supported, but at least we recognize it.
-# endif
-# if defined(NeXT) && defined(mc68000)
-#   define M68K
-#   define NEXT
-#   define mach_type_known
-# endif
-# if defined(NeXT) && (defined(i386) || defined(__i386__))
-#   define I386
-#   define NEXT
-#   define mach_type_known
-# endif
-# if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))
-#   define I386
-#   define OPENBSD
-#   define mach_type_known
-# endif
-# if defined(FREEBSD) && (defined(i386) || defined(__i386__))
-#   define I386
-#   define mach_type_known
-# endif
-# if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
-#   define I386
-#   define mach_type_known
-# endif
-# if defined(bsdi) && (defined(i386) || defined(__i386__))
-#    define I386
-#    define BSDI
-#    define mach_type_known
-# endif
-# if !defined(mach_type_known) && defined(__386BSD__)
-#   define I386
-#   define THREE86BSD
-#   define mach_type_known
-# endif
-# if defined(_CX_UX) && defined(_M88K)
-#   define M88K
-#   define CX_UX
-#   define mach_type_known
-# endif
-# if defined(DGUX) && defined(m88k)
-#   define M88K
-    /* DGUX defined */
-#   define mach_type_known
-# endif
-# if defined(_WIN32_WCE)
-    /* SH3, SH4, MIPS already defined for corresponding architectures */
-#   if defined(SH3) || defined(SH4)
-#     define SH
-#   endif
-#   if defined(x86)
-#     define I386
-#   endif
-#   if defined(ARM)
-#     define ARM32
-#   endif
-#   define MSWINCE
-#   define mach_type_known
-# else
-#   if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
-        || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
-#     define I386
-#     define MSWIN32	/* or Win32s */
-#     define mach_type_known
-#   endif
-# endif
-# if defined(__DJGPP__)
-#   define I386
-#   ifndef DJGPP
-#     define DJGPP  /* MSDOS running the DJGPP port of GCC */
-#   endif
-#   define mach_type_known
-# endif
-# if defined(__CYGWIN32__) || defined(__CYGWIN__)
-#   define I386
-#   define CYGWIN32
-#   define mach_type_known
-# endif
-# if defined(__MINGW32__)
-#   define I386
-#   define MSWIN32
-#   define mach_type_known
-# endif
-# if defined(__BORLANDC__)
-#   define I386
-#   define MSWIN32
-#   define mach_type_known
-# endif
-# if defined(_UTS) && !defined(mach_type_known)
-#   define S370
-#   define UTS4
-#   define mach_type_known
-# endif
-# if defined(__pj__)
-#   define PJ
-#   define mach_type_known
-# endif
-# if defined(__embedded__) && defined(PPC)
-#   define POWERPC
-#   define NOSYS
-#   define mach_type_known
-# endif
-/* Ivan Demakov */
-# if defined(__WATCOMC__) && defined(__386__)
-#   define I386
-#   if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
-#     if defined(__OS2__)
-#       define OS2
-#     else
-#       if defined(__WINDOWS_386__) || defined(__NT__)
-#         define MSWIN32
-#       else
-#         define DOS4GW
-#       endif
-#     endif
-#   endif
-#   define mach_type_known
-# endif
-# if defined(__s390__) && defined(LINUX)
-#    define S370
-#    define mach_type_known
-# endif
-# if defined(__GNU__)
-#   if defined(__i386__)
-/* The Debian Hurd running on generic PC */  
-#     define  HURD
-#     define  I386
-#     define  mach_type_known
-#    endif 
-# endif
-
-/* Feel free to add more clauses here */
-
-/* Or manually define the machine type here.  A machine type is 	*/
-/* characterized by the architecture.  Some				*/
-/* machine types are further subdivided by OS.				*/
-/* the macros ULTRIX, RISCOS, and BSD to distinguish.			*/
-/* Note that SGI IRIX is treated identically to RISCOS.			*/
-/* SYSV on an M68K actually means A/UX.					*/
-/* The distinction in these cases is usually the stack starting address */
-# ifndef mach_type_known
-	--> unknown machine type
-# endif
-		    /* Mapping is: M68K       ==> Motorola 680X0	*/
-		    /*		   (SUNOS4,HP,NEXT, and SYSV (A/UX),	*/
-		    /*		   MACOS and AMIGA variants)		*/
-		    /*             I386       ==> Intel 386	 	*/
-		    /*		    (SEQUENT, OS2, SCO, LINUX, NETBSD,	*/
-		    /*		     FREEBSD, THREE86BSD, MSWIN32,	*/
-		    /* 		     BSDI,SUNOS5, NEXT, other variants)	*/
-                    /*             NS32K      ==> Encore Multimax 	*/
-                    /*             MIPS       ==> R2000 or R3000	*/
-                    /*			(RISCOS, ULTRIX variants)	*/
-                    /*		   VAX	      ==> DEC VAX		*/
-                    /*			(BSD, ULTRIX variants)		*/
-                    /*		   RS6000     ==> IBM RS/6000 AIX3.X	*/
-                    /*		   RT	      ==> IBM PC/RT		*/
-                    /*		   HP_PA      ==> HP9000/700 & /800	*/
-                    /*				  HP/UX, LINUX		*/
-		    /*		   SPARC      ==> SPARC	v7/v8/v9	*/
-		    /*			(SUNOS4, SUNOS5, LINUX,		*/
-		    /*			 DRSNX variants)		*/
-		    /* 		   ALPHA      ==> DEC Alpha 		*/
-		    /*			(OSF1 and LINUX variants)	*/
-		    /* 		   M88K       ==> Motorola 88XX0        */
-		    /* 		        (CX_UX and DGUX)		*/
-		    /* 		   S370	      ==> 370-like machine	*/
-		    /* 			running Amdahl UTS4		*/
-		    /*			or a 390 running LINUX		*/
-		    /* 		   ARM32      ==> Intel StrongARM	*/
-		    /* 		   IA64	      ==> Intel IPF		*/
-		    /*				  (e.g. Itanium)	*/
-		    /*			(LINUX and HPUX)	        */
-		    /* 		   IA64_32    ==> IA64 w/32 bit ABI	*/
-		    /* 			(HPUX)				*/
-		    /*		   SH	      ==> Hitachi SuperH	*/
-		    /* 			(LINUX & MSWINCE)		*/
-
-
-/*
- * For each architecture and OS, the following need to be defined:
- *
- * CPP_WORD_SZ is a simple integer constant representing the word size.
- * in bits.  We assume byte addressibility, where a byte has 8 bits.
- * We also assume CPP_WORD_SZ is either 32 or 64.
- * (We care about the length of pointers, not hardware
- * bus widths.  Thus a 64 bit processor with a C compiler that uses
- * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
- *
- * MACH_TYPE is a string representation of the machine type.
- * OS_TYPE is analogous for the OS.
- *
- * ALIGNMENT is the largest N, such that
- * all pointer are guaranteed to be aligned on N byte boundaries.
- * defining it to be 1 will always work, but perform poorly.
- *
- * DATASTART is the beginning of the data segment.
- * On some platforms SEARCH_FOR_DATA_START is defined.
- * SEARCH_FOR_DATASTART will cause GC_data_start to
- * be set to an address determined by accessing data backwards from _end
- * until an unmapped page is found.  DATASTART will be defined to be
- * GC_data_start.
- * On UNIX-like systems, the collector will scan the area between DATASTART
- * and DATAEND for root pointers.
- *
- * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.
- * RTH suggests gaining access to linker script synth'd values with
- * this idiom instead of `&end' where `end' is defined as ``extern int end;'' .
- *
- * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
- * the pointer size.
- *
- * STACKBOTTOM is the cool end of the stack, which is usually the
- * highest address in the stack.
- * Under PCR or OS/2, we have other ways of finding thread stacks.
- * For each machine, the following should:
- * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
- * 2) define exactly one of
- *	STACKBOTTOM (should be defined to be an expression)
- *	LINUX_STACKBOTTOM
- *	HEURISTIC1
- *	HEURISTIC2
- * If STACKBOTTOM is defined, then it's value will be used directly as the
- * stack base.  If LINUX_STACKBOTTOM is defined, then it will be determined
- * with a method appropriate for most Linux systems.  Currently we look
- * first for __libc_stack_end, and if that fails read it from /proc.
- * If either of the last two macros are defined, then STACKBOTTOM is computed
- * during collector startup using one of the following two heuristics:
- * HEURISTIC1:  Take an address inside GC_init's frame, and round it up to
- *		the next multiple of STACK_GRAN.
- * HEURISTIC2:  Take an address inside GC_init's frame, increment it repeatedly
- *		in small steps (decrement if STACK_GROWS_UP), and read the value
- *		at each location.  Remember the value when the first
- *		Segmentation violation or Bus error is signalled.  Round that
- *		to the nearest plausible page boundary, and use that instead
- *		of STACKBOTTOM.
- *
- * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
- * the value of environ is a pointer that can serve as STACKBOTTOM.
- * I expect that HEURISTIC2 can be replaced by this approach, which
- * interferes far less with debugging.  However it has the disadvantage
- * that it's confused by a putenv call before the collector is initialized.
- * This could be dealt with by intercepting putenv ...
- *
- * If no expression for STACKBOTTOM can be found, and neither of the above
- * heuristics are usable, the collector can still be used with all of the above
- * undefined, provided one of the following is done:
- * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
- *    without reference to STACKBOTTOM.  This is appropriate for use in
- *    conjunction with thread packages, since there will be multiple stacks.
- *    (Allocating thread stacks in the heap, and treating them as ordinary
- *    heap data objects is also possible as a last resort.  However, this is
- *    likely to introduce significant amounts of excess storage retention
- *    unless the dead parts of the thread stacks are periodically cleared.)
- * 2) Client code may set GC_stackbottom before calling any GC_ routines.
- *    If the author of the client code controls the main program, this is
- *    easily accomplished by introducing a new main program, setting
- *    GC_stackbottom to the address of a local variable, and then calling
- *    the original main program.  The new main program would read something
- *    like:
- *
- *		# include "gc_private.h"
- *
- *		main(argc, argv, envp)
- *		int argc;
- *		char **argv, **envp;
- *		{
- *		    int dummy;
- *
- *		    GC_stackbottom = (ptr_t)(&dummy);
- *		    return(real_main(argc, argv, envp));
- *		}
- *
- *
- * Each architecture may also define the style of virtual dirty bit
- * implementation to be used:
- *   MPROTECT_VDB: Write protect the heap and catch faults.
- *   PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
- *
- * An architecture may define DYNAMIC_LOADING if dynamic_load.c
- * defined GC_register_dynamic_libraries() for the architecture.
- *
- * An architecture may define PREFETCH(x) to preload the cache with *x.
- * This defaults to a no-op.
- *
- * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
- *
- * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
- * clear the two words at GC_malloc-aligned address x.  By default,
- * word stores of 0 are used instead.
- *
- * HEAP_START may be defined as the initial address hint for mmap-based
- * allocation.
- */
-
-/* If we are using a recent version of gcc, we can use __builtin_unwind_init()
- * to push the relevant registers onto the stack.  This generally makes
- * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers.
- */
-# if defined(__GNUC__) && ((__GNUC__ >= 3) || \
-			   (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
-#   define HAVE_BUILTIN_UNWIND_INIT
-# endif
-
-# define STACK_GRAN 0x1000000
-# ifdef M68K
-#   define MACH_TYPE "M68K"
-#   define ALIGNMENT 2
-#   ifdef OPENBSD
-#	define OS_TYPE "OPENBSD"
-#	define HEURISTIC2
-	extern char etext[];
-#	define DATASTART ((ptr_t)(etext))
-#   endif
-#   ifdef NETBSD
-#	define OS_TYPE "NETBSD"
-#	define HEURISTIC2
-	extern char etext[];
-#	define DATASTART ((ptr_t)(etext))
-#   endif
-#   ifdef LINUX
-#       define OS_TYPE "LINUX"
-#       define STACKBOTTOM ((ptr_t)0xf0000000)
-/* #       define MPROTECT_VDB - Reported to not work  9/17/01 */
-#       ifdef __ELF__
-#            define DYNAMIC_LOADING
-#	     include <features.h>
-#	     if defined(__GLIBC__)&& __GLIBC__>=2
-#              define LINUX_DATA_START
-#	     else /* !GLIBC2 */
-               extern char **__environ;
-#              define DATASTART ((ptr_t)(&__environ))
-                             /* hideous kludge: __environ is the first */
-                             /* word in crt0.o, and delimits the start */
-                             /* of the data segment, no matter which   */
-                             /* ld options were passed through.        */
-                             /* We could use _etext instead, but that  */
-                             /* would include .rodata, which may       */
-                             /* contain large read-only data tables    */
-                             /* that we'd rather not scan.             */
-#	     endif /* !GLIBC2 */
-             extern int _end[];
-#            define DATAEND (_end)
-#       else
-             extern int etext[];
-#            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#       endif
-#   endif
-#   ifdef SUNOS4
-#	define OS_TYPE "SUNOS4"
-	extern char etext[];
-#	define DATASTART ((ptr_t)((((word) (etext)) + 0x1ffff) & ~0x1ffff))
-#	define HEURISTIC1	/* differs	*/
-#	define DYNAMIC_LOADING
-#   endif
-#   ifdef HP
-#	define OS_TYPE "HP"
-	extern char etext[];
-#       define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#       define STACKBOTTOM ((ptr_t) 0xffeffffc)
-			      /* empirically determined.  seems to work. */
-#  	include <unistd.h>
-#	define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
-#   endif
-#   ifdef SYSV
-#	define OS_TYPE "SYSV"
-	extern etext[];
-#   	define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
-				   & ~0x3fffff) \
-				  +((word)etext & 0x1fff))
-	/* This only works for shared-text binaries with magic number 0413.
-	   The other sorts of SysV binaries put the data at the end of the text,
-	   in which case the default of etext would work.  Unfortunately,
-	   handling both would require having the magic-number available.
-	   	   		-- Parag
-	   */
-#	define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
-			/* The stack starts at the top of memory, but   */
-			/* 0x0 cannot be used as setjump_test complains */
-			/* that the stack direction is incorrect.  Two  */
-			/* bytes down from 0x0 should be safe enough.   */
-			/* 		--Parag				*/
-#   	include <sys/mmu.h>
-#	define GETPAGESIZE() PAGESIZE	/* Is this still right? */
-#   endif
-#   ifdef AMIGA
-#	define OS_TYPE "AMIGA"
- 	    	/* STACKBOTTOM and DATASTART handled specially	*/
- 	    	/* in os_dep.c					*/
-# 	define DATAEND	/* not needed */
-#	define GETPAGESIZE() 4096
-#   endif
-#   ifdef MACOS
-#     ifndef __LOWMEM__
-#     include <LowMem.h>
-#     endif
-#     define OS_TYPE "MACOS"
-			/* see os_dep.c for details of global data segments. */
-#     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
-#     define DATAEND	/* not needed */
-#     define GETPAGESIZE() 4096
-#   endif
-#   ifdef NEXT
-#	define OS_TYPE "NEXT"
-#	define DATASTART ((ptr_t) get_etext())
-#	define STACKBOTTOM ((ptr_t) 0x4000000)
-#	define DATAEND	/* not needed */
-#   endif
-# endif
-
-# ifdef POWERPC
-#   define MACH_TYPE "POWERPC"
-#   ifdef MACOS
-#     define ALIGNMENT 2  /* Still necessary?  Could it be 4?	*/
-#     ifndef __LOWMEM__
-#     include <LowMem.h>
-#     endif
-#     define OS_TYPE "MACOS"
-			/* see os_dep.c for details of global data segments. */
-#     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
-#     define DATAEND  /* not needed */
-#   endif
-#   ifdef LINUX
-#     define ALIGNMENT 4	/* Guess.  Can someone verify?	*/
-				/* This was 2, but that didn't sound right. */
-#     define OS_TYPE "LINUX"
-#     define HEURISTIC1
-#     define DYNAMIC_LOADING
-#     undef STACK_GRAN
-#     define STACK_GRAN 0x10000000
-	/* Stack usually starts at 0x80000000 */
-#     define LINUX_DATA_START
-      extern int _end[];
-#     define DATAEND (_end)
-#   endif
-#   ifdef MACOSX
-      /* There are reasons to suspect this may not be reliable. 	*/
-#     define ALIGNMENT 4
-#     define OS_TYPE "MACOSX"
-#     define DATASTART ((ptr_t) get_etext())
-#     define STACKBOTTOM ((ptr_t) 0xc0000000)
-#     define DATAEND	/* not needed */
-#     define MPROTECT_VDB
-#     include <unistd.h>
-#     define GETPAGESIZE() getpagesize()
-#   endif
-#   ifdef NETBSD
-#     define ALIGNMENT 4
-#     define OS_TYPE "NETBSD"
-#     define HEURISTIC2
-      extern char etext[];
-#     define DATASTART GC_data_start
-#     define DYNAMIC_LOADING
-#   endif
-#   ifdef NOSYS
-#     define ALIGNMENT 4
-#     define OS_TYPE "NOSYS"
-      extern void __end[], __dso_handle[];
-#     define DATASTART (__dso_handle)  /* OK, that's ugly.  */
-#     define DATAEND (__end)
-	/* Stack starts at 0xE0000000 for the simulator.  */
-#     undef STACK_GRAN
-#     define STACK_GRAN 0x10000000
-#     define HEURISTIC1
-#   endif
-# endif
-
-# ifdef VAX
-#   define MACH_TYPE "VAX"
-#   define ALIGNMENT 4	/* Pointers are longword aligned by 4.2 C compiler */
-    extern char etext[];
-#   define DATASTART ((ptr_t)(etext))
-#   ifdef BSD
-#	define OS_TYPE "BSD"
-#	define HEURISTIC1
-			/* HEURISTIC2 may be OK, but it's hard to test. */
-#   endif
-#   ifdef ULTRIX
-#	define OS_TYPE "ULTRIX"
-#	define STACKBOTTOM ((ptr_t) 0x7fffc800)
-#   endif
-# endif
-
-# ifdef RT
-#   define MACH_TYPE "RT"
-#   define ALIGNMENT 4
-#   define DATASTART ((ptr_t) 0x10000000)
-#   define STACKBOTTOM ((ptr_t) 0x1fffd800)
-# endif
-
-# ifdef SPARC
-#   define MACH_TYPE "SPARC"
-#   if defined(__arch64__) || defined(__sparcv9)
-#     define ALIGNMENT 8
-#     define CPP_WORDSZ 64
-#     define ELF_CLASS ELFCLASS64
-#   else
-#     define ALIGNMENT 4	/* Required by hardware	*/
-#     define CPP_WORDSZ 32
-#   endif
-#   define ALIGN_DOUBLE
-#   ifdef SUNOS5
-#	define OS_TYPE "SUNOS5"
-	extern int _etext[];
-	extern int _end[];
-	extern char * GC_SysVGetDataStart();
-#       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, _etext)
-#	define DATAEND (_end)
-#	if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
-#	    define USE_MMAP
-	    /* Otherwise we now use calloc.  Mmap may result in the	*/
-	    /* heap interleaved with thread stacks, which can result in	*/
-	    /* excessive blacklisting.  Sbrk is unusable since it	*/
-	    /* doesn't interact correctly with the system malloc.	*/
-#	endif
-#       ifdef USE_MMAP
-#         define HEAP_START (ptr_t)0x40000000
-#       else
-#	  define HEAP_START DATAEND
-#       endif
-#	define PROC_VDB
-/*	HEURISTIC1 reportedly no longer works under 2.7.  		*/
-/*  	HEURISTIC2 probably works, but this appears to be preferable.	*/
-/*	Apparently USRSTACK is defined to be USERLIMIT, but in some	*/
-/* 	installations that's undefined.  We work around this with a	*/
-/*	gross hack:							*/
-#       include <sys/vmparam.h>
-#	ifdef USERLIMIT
-	  /* This should work everywhere, but doesn't.	*/
-#	  define STACKBOTTOM USRSTACK
-#       else
-#	  define HEURISTIC2
-#       endif
-#	include <unistd.h>
-#       define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
-		/* getpagesize() appeared to be missing from at least one */
-		/* Solaris 5.4 installation.  Weird.			  */
-#	define DYNAMIC_LOADING
-#   endif
-#   ifdef SUNOS4
-#	define OS_TYPE "SUNOS4"
-	/* [If you have a weak stomach, don't read this.]		*/
-	/* We would like to use:					*/
-/* #       define DATASTART ((ptr_t)((((word) (etext)) + 0x1fff) & ~0x1fff)) */
-	/* This fails occasionally, due to an ancient, but very 	*/
-	/* persistent ld bug.  etext is set 32 bytes too high.		*/
-	/* We instead read the text segment size from the a.out		*/
-	/* header, which happens to be mapped into our address space	*/
-	/* at the start of the text segment.  The detective work here	*/
-	/* was done by Robert Ehrlich, Manuel Serrano, and Bernard	*/
-	/* Serpette of INRIA.						*/
-	/* This assumes ZMAGIC, i.e. demand-loadable executables.	*/
-#	define TEXTSTART 0x2000
-#       define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
-#	define MPROTECT_VDB
-#	define HEURISTIC1
-# 	define DYNAMIC_LOADING
-#   endif
-#   ifdef DRSNX
-#	define OS_TYPE "DRSNX"
-	extern char * GC_SysVGetDataStart();
-	extern int etext[];
-#       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, etext)
-#	define MPROTECT_VDB
-#       define STACKBOTTOM ((ptr_t) 0xdfff0000)
-#	define DYNAMIC_LOADING
-#   endif
-#   ifdef LINUX
-#     define OS_TYPE "LINUX"
-#     ifdef __ELF__
-#       define DYNAMIC_LOADING
-#     else
-          Linux Sparc/a.out not supported
-#     endif
-      extern int _end[];
-      extern int _etext[];
-#     define DATAEND (_end)
-#     define SVR4
-#     ifdef __arch64__
-#	define DATASTART (ptr_t)GC_SysVGetDataStart(0x100000, _etext)
-	/* libc_stack_end is not set reliably for sparc64 */
-#       define STACKBOTTOM ((ptr_t) 0x80000000000ULL)
-#     else
-#       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, _etext)
-#	define LINUX_STACKBOTTOM
-#     endif
-#   endif
-#   ifdef OPENBSD
-#     define OS_TYPE "OPENBSD"
-#     define STACKBOTTOM ((ptr_t) 0xf8000000)
-      extern int etext[];
-#     define DATASTART ((ptr_t)(etext))
-#   endif
-#   ifdef NETBSD
-#     define OS_TYPE "NETBSD"
-#     define HEURISTIC2
-#     ifdef __ELF__
-#	define DATASTART GC_data_start
-#	define DYNAMIC_LOADING
-#     else
-	extern char etext[];
-#	define DATASTART ((ptr_t)(etext))
-#     endif
-#   endif
-# endif
-
-# ifdef I386
-#   define MACH_TYPE "I386"
-#   define ALIGNMENT 4	/* Appears to hold for all "32 bit" compilers	*/
-			/* except Borland.  The -a4 option fixes 	*/
-			/* Borland.					*/
-                        /* Ivan Demakov: For Watcom the option is -zp4. */
-#   ifndef SMALL_CONFIG
-#     define ALIGN_DOUBLE /* Not strictly necessary, but may give speed   */
-			  /* improvement on Pentiums.			  */
-#   endif
-#   ifdef HAVE_BUILTIN_UNWIND_INIT
-#	define USE_GENERIC_PUSH_REGS
-#   endif
-#   ifdef SEQUENT
-#	define OS_TYPE "SEQUENT"
-	extern int etext[];
-#       define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#       define STACKBOTTOM ((ptr_t) 0x3ffff000) 
-#   endif
-#   ifdef BEOS
-#     define OS_TYPE "BEOS"
-#     include <OS.h>
-#     define GETPAGESIZE() B_PAGE_SIZE
-      extern int etext[];
-#     define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#   endif
-#   ifdef SUNOS5
-#	define OS_TYPE "SUNOS5"
-        extern int _etext[], _end[];
-  	extern char * GC_SysVGetDataStart();
-#       define DATASTART GC_SysVGetDataStart(0x1000, _etext)
-#	define DATAEND (_end)
-/*	# define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7,  	*/
-/*      but reportedly breaks under 2.8.  It appears that the stack	*/
-/* 	base is a property of the executable, so this should not break	*/
-/* 	old executables.						*/
-/*  	HEURISTIC2 probably works, but this appears to be preferable.	*/
-#       include <sys/vm.h>
-#	define STACKBOTTOM USRSTACK
-/* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
-/* It appears to be fixed in 2.8 and 2.9.				*/
-#	ifdef SOLARIS25_PROC_VDB_BUG_FIXED
-#	  define PROC_VDB
-#	endif
-#	define DYNAMIC_LOADING
-#	if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
-#	    define USE_MMAP
-	    /* Otherwise we now use calloc.  Mmap may result in the	*/
-	    /* heap interleaved with thread stacks, which can result in	*/
-	    /* excessive blacklisting.  Sbrk is unusable since it	*/
-	    /* doesn't interact correctly with the system malloc.	*/
-#	endif
-#       ifdef USE_MMAP
-#         define HEAP_START (ptr_t)0x40000000
-#       else
-#	  define HEAP_START DATAEND
-#       endif
-#   endif
-#   ifdef SCO
-#	define OS_TYPE "SCO"
-	extern int etext[];
-#   	define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
-				  & ~0x3fffff) \
-				 +((word)etext & 0xfff))
-#	define STACKBOTTOM ((ptr_t) 0x7ffffffc)
-#   endif
-#   ifdef SCO_ELF
-#       define OS_TYPE "SCO_ELF"
-        extern int etext[];
-#       define DATASTART ((ptr_t)(etext))
-#       define STACKBOTTOM ((ptr_t) 0x08048000)
-#       define DYNAMIC_LOADING
-#	define ELF_CLASS ELFCLASS32
-#   endif
-#   ifdef DGUX
-#	define OS_TYPE "DGUX"
-	extern int _etext, _end;
-	extern char * GC_SysVGetDataStart();
-#	define DATASTART GC_SysVGetDataStart(0x1000, &_etext)
-#	define DATAEND (&_end)
-#	define STACK_GROWS_DOWN
-#	define HEURISTIC2
-#	include <unistd.h>
-#	define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
-#	define DYNAMIC_LOADING
-#	ifndef USE_MMAP
-#	  define USE_MMAP
-#	endif /* USE_MMAP */
-#	define MAP_FAILED (void *) -1
-#	ifdef USE_MMAP
-#	  define HEAP_START (ptr_t)0x40000000
-#	else /* USE_MMAP */
-#	  define HEAP_START DATAEND
-#	endif /* USE_MMAP */
-#   endif /* DGUX */
-
-#   ifdef LINUX
-#	ifndef __GNUC__
-	  /* The Intel compiler doesn't like inline assembly */
-#	  define USE_GENERIC_PUSH_REGS
-# 	endif
-#	define OS_TYPE "LINUX"
-#       define LINUX_STACKBOTTOM
-#	if 0
-#	  define HEURISTIC1
-#         undef STACK_GRAN
-#         define STACK_GRAN 0x10000000
-	  /* STACKBOTTOM is usually 0xc0000000, but this changes with	*/
-	  /* different kernel configurations.  In particular, systems	*/
-	  /* with 2GB physical memory will usually move the user	*/
-	  /* address space limit, and hence initial SP to 0x80000000.	*/
-#       endif
-#       if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
-#	    define MPROTECT_VDB
-#	else
-	    /* We seem to get random errors in incremental mode,	*/
-	    /* possibly because Linux threads is itself a malloc client */
-	    /* and can't deal with the signals.				*/
-#	endif
-#	define HEAP_START 0x1000
-		/* This encourages mmap to give us low addresses,	*/
-		/* thus allowing the heap to grow to ~3GB		*/
-#       ifdef __ELF__
-#            define DYNAMIC_LOADING
-#	     ifdef UNDEFINED	/* includes ro data */
-	       extern int _etext[];
-#              define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
-#	     endif
-#	     include <features.h>
-#	     if defined(__GLIBC__) && __GLIBC__ >= 2
-#		 define LINUX_DATA_START
-#	     else
-     	         extern char **__environ;
-#                define DATASTART ((ptr_t)(&__environ))
-			      /* hideous kludge: __environ is the first */
-			      /* word in crt0.o, and delimits the start */
-			      /* of the data segment, no matter which   */
-			      /* ld options were passed through.        */
-			      /* We could use _etext instead, but that  */
-			      /* would include .rodata, which may       */
-			      /* contain large read-only data tables    */
-			      /* that we'd rather not scan.		*/
-#	     endif
-	     extern int _end[];
-#	     define DATAEND (_end)
-#	else
-	     extern int etext[];
-#            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#       endif
-#	ifdef USE_I686_PREFETCH
-#	  define PREFETCH(x) \
-	    __asm__ __volatile__ ("	prefetchnta	%0": : "m"(*(char *)(x)))
-	    /* Empirically prefetcht0 is much more effective at reducing	*/
-	    /* cache miss stalls for the targetted load instructions.  But it	*/
-	    /* seems to interfere enough with other cache traffic that the net	*/
-	    /* result is worse than prefetchnta.				*/
-#         if 0 
-	    /* Using prefetches for write seems to have a slight negative	*/
-	    /* impact on performance, at least for a PIII/500.			*/
-#	    define PREFETCH_FOR_WRITE(x) \
-	      __asm__ __volatile__ ("	prefetcht0	%0": : "m"(*(char *)(x)))
-#	  endif
-#	endif
-#	ifdef USE_3DNOW_PREFETCH
-#	  define PREFETCH(x) \
-	    __asm__ __volatile__ ("	prefetch	%0": : "m"(*(char *)(x)))
-#	  define PREFETCH_FOR_WRITE(x) \
-	    __asm__ __volatile__ ("	prefetchw	%0": : "m"(*(char *)(x)))
-#	endif
-#   endif
-#   ifdef CYGWIN32
-#       define OS_TYPE "CYGWIN32"
-          extern int _data_start__[];
-          extern int _data_end__[];
-          extern int _bss_start__[];
-          extern int _bss_end__[];
-  	/* For binutils 2.9.1, we have			*/
-  	/*	DATASTART   = _data_start__		*/
-  	/*	DATAEND	    = _bss_end__		*/
-  	/* whereas for some earlier versions it was	*/
-  	/*	DATASTART   = _bss_start__		*/
-  	/*	DATAEND	    = _data_end__		*/
-  	/* To get it right for both, we take the	*/
-  	/* minumum/maximum of the two.			*/
-#   	define MAX(x,y) ((x) > (y) ? (x) : (y))
-#   	define MIN(x,y) ((x) < (y) ? (x) : (y))
-#       define DATASTART ((ptr_t) MIN(_data_start__, _bss_start__))
-#       define DATAEND	 ((ptr_t) MAX(_data_end__, _bss_end__))
-#	undef STACK_GRAN
-#       define STACK_GRAN 0x10000
-#       define HEURISTIC1
-#   endif
-#   ifdef OS2
-#	define OS_TYPE "OS2"
- 	    	/* STACKBOTTOM and DATASTART are handled specially in 	*/
-		/* os_dep.c. OS2 actually has the right			*/
-		/* system call!						*/
-#	define DATAEND	/* not needed */
-#	define USE_GENERIC_PUSH_REGS
-#   endif
-#   ifdef MSWIN32
-#	define OS_TYPE "MSWIN32"
-		/* STACKBOTTOM and DATASTART are handled specially in 	*/
-		/* os_dep.c.						*/
-#       ifndef __WATCOMC__
-#	  define MPROTECT_VDB
-#	endif
-#       define DATAEND  /* not needed */
-#   endif
-#   ifdef MSWINCE
-#	define OS_TYPE "MSWINCE"
-#       define DATAEND  /* not needed */
-#   endif
-#   ifdef DJGPP
-#       define OS_TYPE "DJGPP"
-#       include "stubinfo.h"
-        extern int etext[];
-        extern int _stklen;
-        extern int __djgpp_stack_limit;
-#       define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))
-/* #       define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
-                                                     + _stklen)) */
-#       define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
-		/* This may not be right.  */
-#   endif
-#   ifdef OPENBSD
-#	define OS_TYPE "OPENBSD"
-#   endif
-#   ifdef FREEBSD
-#	define OS_TYPE "FREEBSD"
-#	ifndef GC_FREEBSD_THREADS
-#	    define MPROTECT_VDB
-#	endif
-#	define SIG_SUSPEND SIGUSR1
-#	define SIG_THR_RESTART SIGUSR2
-#	define FREEBSD_STACKBOTTOM
-#	ifdef __ELF__
-#	    define DYNAMIC_LOADING
-#	endif
-	extern char etext[];
-#	define DATASTART ((ptr_t)(etext))
-#   endif
-#   ifdef NETBSD
-#	define OS_TYPE "NETBSD"
-#	ifdef __ELF__
-#	    define DYNAMIC_LOADING
-#	endif
-#   endif
-#   ifdef THREE86BSD
-#	define OS_TYPE "THREE86BSD"
-#   endif
-#   ifdef BSDI
-#	define OS_TYPE "BSDI"
-#   endif
-#   if defined(OPENBSD) || defined(NETBSD) \
-        || defined(THREE86BSD) || defined(BSDI)
-#	define HEURISTIC2
-	extern char etext[];
-#	define DATASTART ((ptr_t)(etext))
-#   endif
-#   ifdef NEXT
-#	define OS_TYPE "NEXT"
-#	define DATASTART ((ptr_t) get_etext())
-#	define STACKBOTTOM ((ptr_t)0xc0000000)
-#	define DATAEND	/* not needed */
-#   endif
-#   ifdef DOS4GW
-#     define OS_TYPE "DOS4GW"
-      extern long __nullarea;
-      extern char _end;
-      extern char *_STACKTOP;
-      /* Depending on calling conventions Watcom C either precedes
-         or does not precedes with undescore names of C-variables.
-         Make sure startup code variables always have the same names.  */
-      #pragma aux __nullarea "*";
-      #pragma aux _end "*";
-#     define STACKBOTTOM ((ptr_t) _STACKTOP)
-                         /* confused? me too. */
-#     define DATASTART ((ptr_t) &__nullarea)
-#     define DATAEND ((ptr_t) &_end)
-#   endif
-#   ifdef HURD
-#     define OS_TYPE "HURD"
-#     define STACK_GROWS_DOWN
-#     define HEURISTIC2
-      extern int  __data_start[];
-#     define DATASTART ( (ptr_t) (__data_start))
-      extern int   _end[];
-#     define DATAEND ( (ptr_t) (_end))
-/* #     define MPROTECT_VDB  Not quite working yet? */
-#     define DYNAMIC_LOADING
-#   endif
-# endif
-
-# ifdef NS32K
-#   define MACH_TYPE "NS32K"
-#   define ALIGNMENT 4
-    extern char **environ;
-#   define DATASTART ((ptr_t)(&environ))
-			      /* hideous kludge: environ is the first   */
-			      /* word in crt0.o, and delimits the start */
-			      /* of the data segment, no matter which   */
-			      /* ld options were passed through.        */
-#   define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
-# endif
-
-# ifdef MIPS
-#   define MACH_TYPE "MIPS"
-#   ifdef LINUX
-      /* This was developed for a linuxce style platform.  Probably	*/
-      /* needs to be tweaked for workstation class machines.		*/
-#     define OS_TYPE "LINUX"
-#     define DYNAMIC_LOADING
-      extern int _end[];
-#     define DATAEND (_end)
-      extern int __data_start[];
-#     define DATASTART ((ptr_t)(__data_start))
-#     define ALIGNMENT 4
-#     define USE_GENERIC_PUSH_REGS
-#     if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
-#        define LINUX_STACKBOTTOM
-#     else
-#        define STACKBOTTOM 0x80000000
-#     endif
-#   endif /* Linux */
-#   ifdef EWS4800
-#      define HEURISTIC2
-#      if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
-         extern int _fdata[], _end[];
-#        define DATASTART ((ptr_t)_fdata)
-#        define DATAEND ((ptr_t)_end)
-#        define CPP_WORDSZ _MIPS_SZPTR
-#        define ALIGNMENT (_MIPS_SZPTR/8)
-#      else
-         extern int etext[], edata[], end[];
-         extern int _DYNAMIC_LINKING[], _gp[];
-#        define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \
-               + ((word)etext & 0xffff)))
-#        define DATAEND (edata)
-#        define DATASTART2 (_DYNAMIC_LINKING \
-               ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
-               : (ptr_t)edata)
-#        define DATAEND2 (end)
-#        define ALIGNMENT 4
-#      endif
-#      define OS_TYPE "EWS4800"
-#      define USE_GENERIC_PUSH_REGS 1
-#   endif
-#   ifdef ULTRIX
-#	define HEURISTIC2
-#       define DATASTART (ptr_t)0x10000000
-			      /* Could probably be slightly higher since */
-			      /* startup code allocates lots of stuff.   */
-#	define OS_TYPE "ULTRIX"
-#       define ALIGNMENT 4
-#   endif
-#   ifdef RISCOS
-#	define HEURISTIC2
-#       define DATASTART (ptr_t)0x10000000
-#	define OS_TYPE "RISCOS"
-#   	define ALIGNMENT 4  /* Required by hardware */
-#   endif
-#   ifdef IRIX5
-#	define HEURISTIC2
-        extern int _fdata[];
-#       define DATASTART ((ptr_t)(_fdata))
-#       ifdef USE_MMAP
-#         define HEAP_START (ptr_t)0x30000000
-#       else
-#	  define HEAP_START DATASTART
-#       endif
-			      /* Lowest plausible heap address.		*/
-			      /* In the MMAP case, we map there.	*/
-			      /* In either case it is used to identify	*/
-			      /* heap sections so they're not 		*/
-			      /* considered as roots.			*/
-#	define OS_TYPE "IRIX5"
-#       define MPROTECT_VDB
-#       ifdef _MIPS_SZPTR
-#	  define CPP_WORDSZ _MIPS_SZPTR
-#	  define ALIGNMENT (_MIPS_SZPTR/8)
-#	  if CPP_WORDSZ != 64
-#	    define ALIGN_DOUBLE
-#	  endif
-#	else
-#         define ALIGNMENT 4
-#	  define ALIGN_DOUBLE
-#	endif
-#	define DYNAMIC_LOADING
-#   endif
-#   ifdef MSWINCE
-#       define OS_TYPE "MSWINCE"
-#       define ALIGNMENT 4
-#       define DATAEND /* not needed */
-#   endif
-#   if defined(NETBSD)
-      /* This also checked for __MIPSEL__ .  Why?  NETBSD recognition	*/
-      /* should be handled at the top of the file.			*/
-#     define ALIGNMENT 4
-#     define OS_TYPE "NETBSD"
-#     define HEURISTIC2
-#     define USE_GENERIC_PUSH_REGS
-#     ifdef __ELF__
-        extern int etext[];
-#       define DATASTART GC_data_start
-#       define NEED_FIND_LIMIT
-#       define DYNAMIC_LOADING
-#     else
-#       define DATASTART ((ptr_t) 0x10000000)
-#       define STACKBOTTOM ((ptr_t) 0x7ffff000)
-#     endif /* _ELF_ */
-#  endif
-# endif
-
-# ifdef RS6000
-#   define MACH_TYPE "RS6000"
-#   ifdef __64BIT__
-#     define ALIGNMENT 8
-#     define CPP_WORDSZ 64
-#     define STACKBOTTOM 0x1000000000000000
-#   else
-#     define ALIGNMENT 4
-#     define CPP_WORDSZ 32
-#     define STACKBOTTOM ((ptr_t)((ulong)&errno))
-#   endif
-    extern int _data[], _end[];
-#   define DATASTART ((ptr_t)((ulong)_data))
-#   define DATAEND ((ptr_t)((ulong)_end))
-    extern int errno;
-#   define USE_GENERIC_PUSH_REGS
-#   define DYNAMIC_LOADING
-	/* For really old versions of AIX, this may have to be removed. */
-# endif
-
-# ifdef HP_PA
-#   define MACH_TYPE "HP_PA"
-#   ifdef __LP64__
-#     define CPP_WORDSZ 64
-#     define ALIGNMENT 8
-#   else
-#     define CPP_WORDSZ 32
-#     define ALIGNMENT 4
-#     define ALIGN_DOUBLE
-#   endif
-#   if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)
-#     ifndef LINUX /* For now. */
-#       define MPROTECT_VDB
-#     endif
-#   else
-#     define GENERIC_COMPARE_AND_SWAP
-	/* No compare-and-swap instruction.  Use pthread mutexes 	*/
-	/* when we absolutely have to.					*/
-#     ifdef PARALLEL_MARK
-#	define USE_MARK_BYTES
-		/* Minimize compare-and-swap usage.		*/
-#     endif
-#   endif
-#   define STACK_GROWS_UP
-#   ifdef HPUX
-#     define OS_TYPE "HPUX"
-      extern int __data_start[];
-#     define DATASTART ((ptr_t)(__data_start))
-#     if 0
-	/* The following appears to work for 7xx systems running HP/UX	*/
-	/* 9.xx Furthermore, it might result in much faster		*/
-	/* collections than HEURISTIC2, which may involve scanning	*/
-	/* segments that directly precede the stack.  It is not the	*/
-	/* default, since it may not work on older machine/OS		*/
-	/* combinations. (Thanks to Raymond X.T. Nijssen for uncovering	*/
-	/* this.)							*/
-#       define STACKBOTTOM ((ptr_t) 0x7b033000)  /* from /etc/conf/h/param.h */
-#     else
-	/* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2	*/
-	/* to this.  Note that the GC must be initialized before the	*/
-    	/* first putenv call.						*/
-	extern char ** environ;
-#       define STACKBOTTOM ((ptr_t)environ)
-#     endif
-#     define DYNAMIC_LOADING
-#     include <unistd.h>
-#     define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
-#     ifndef __GNUC__
-#       define PREFETCH(x)  { \
-                              register long addr = (long)(x); \
-                              (void) _asm ("LDW", 0, 0, addr, 0); \
-                            }
-#     endif
-#   endif /* HPUX */
-#   ifdef LINUX
-#     define OS_TYPE "LINUX"
-#     define LINUX_STACKBOTTOM
-#     define DYNAMIC_LOADING
-#     define SEARCH_FOR_DATA_START
-      extern int _end[];
-#     define DATAEND (&_end)
-#   endif /* LINUX */
-# endif /* HP_PA */
-
-# ifdef ALPHA
-#   define MACH_TYPE "ALPHA"
-#   define ALIGNMENT 8
-#   ifndef LINUX
-#     define USE_GENERIC_PUSH_REGS
-      /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
-      /* fp registers in some cases when the target is a 21264.  The assembly */
-      /* code doesn't handle that yet, and version dependencies make that a   */
-      /* bit tricky.  Do the easy thing for now.				    */
-#   endif
-#   ifdef NETBSD
-#	define OS_TYPE "NETBSD"
-#	define HEURISTIC2
-#	define DATASTART GC_data_start
-#	define ELFCLASS32 32
-#	define ELFCLASS64 64
-#	define ELF_CLASS ELFCLASS64
-#   	define CPP_WORDSZ 64
-#       define DYNAMIC_LOADING
-#   endif
-#   ifdef OPENBSD
-#	define OS_TYPE "OPENBSD"
-#	define HEURISTIC2
-#   	define CPP_WORDSZ 64
-#   	ifdef __ELF__	/* since OpenBSD/Alpha 2.9 */
-#	   define DATASTART GC_data_start
-#   	   define ELFCLASS32 32
-#   	   define ELFCLASS64 64
-#   	   define ELF_CLASS ELFCLASS64
-#       else		/* ECOFF, until OpenBSD/Alpha 2.7 */
-#   	   define DATASTART ((ptr_t) 0x140000000)
-#   	endif
-#   endif
-#   ifdef FREEBSD
-#	define OS_TYPE "FREEBSD"
-/* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
-#	define SIG_SUSPEND SIGUSR1
-#	define SIG_THR_RESTART SIGUSR2
-#	define FREEBSD_STACKBOTTOM
-#	ifdef __ELF__
-#	    define DYNAMIC_LOADING
-#	endif
-/* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
-	extern char etext[];
-	extern char edata[];
-	extern char end[];
-#	define NEED_FIND_LIMIT
-#	define DATASTART ((ptr_t)(&etext))
-#	define DATAEND (GC_find_limit (DATASTART, TRUE))
-#	define DATASTART2 ((ptr_t)(&edata))
-#	define DATAEND2 ((ptr_t)(&end))
-#	define CPP_WORDSZ 64
-#   endif
-#   ifdef OSF1
-#	define OS_TYPE "OSF1"
-#   	define DATASTART ((ptr_t) 0x140000000)
-	extern int _end[];
-#   	define DATAEND ((ptr_t) &_end)
- 	extern char ** environ;
-	/* round up from the value of environ to the nearest page boundary */
-	/* Probably breaks if putenv is called before collector 	   */
-	/* initialization.						   */
-#	define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
-/* #   	define HEURISTIC2 */
-	/* Normally HEURISTIC2 is too conervative, since		*/
-	/* the text segment immediately follows the stack.		*/
-	/* Hence we give an upper pound.				*/
-	/* This is currently unused, since we disabled HEURISTIC2	*/
-    	extern int __start[];
-#   	define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
-#   	define CPP_WORDSZ 64
-#   	define MPROTECT_VDB
-#   	define DYNAMIC_LOADING
-#   endif
-#   ifdef LINUX
-#       define OS_TYPE "LINUX"
-#       define CPP_WORDSZ 64
-#       define STACKBOTTOM ((ptr_t) 0x120000000)
-#       ifdef __ELF__
-#	  define SEARCH_FOR_DATA_START
-#         define DYNAMIC_LOADING
-#       else
-#           define DATASTART ((ptr_t) 0x140000000)
-#       endif
-	extern int _end[];
-#	define DATAEND (_end)
-#	define MPROTECT_VDB
-		/* Has only been superficially tested.  May not	*/
-		/* work on all versions.			*/
-#   endif
-# endif
-
-# ifdef IA64
-#   define MACH_TYPE "IA64"
-#   define USE_GENERIC_PUSH_REGS
-	/* We need to get preserved registers in addition to register   */
-	/* windows.   That's easiest to do with setjmp.			*/
-#   ifdef PARALLEL_MARK
-#	define USE_MARK_BYTES
-	    /* Compare-and-exchange is too expensive to use for 	*/
-	    /* setting mark bits.					*/
-#   endif
-#   ifdef HPUX
-#	ifdef _ILP32
-#	  define CPP_WORDSZ 32
-#         define ALIGN_DOUBLE
-	    /* Requires 8 byte alignment for malloc */
-#   	  define ALIGNMENT 4
-#       else
-#	  ifndef _LP64
-		---> unknown ABI
-#         endif
-#	  define CPP_WORDSZ 64
-#   	  define ALIGN_DOUBLE
-	    /* Requires 16 byte alignment for malloc */
-#         define ALIGNMENT 8
-#       endif
-#       define OS_TYPE "HPUX"	
-        extern int __data_start[];
-#       define DATASTART ((ptr_t)(__data_start))
-        /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2	*/
-        /* to this.  Note that the GC must be initialized before the	*/
-    	/* first putenv call.						*/
-	extern char ** environ;
-#       define STACKBOTTOM ((ptr_t)environ)
-#       define DYNAMIC_LOADING
-#       include <unistd.h>
-#       define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
- 	/* The following was empirically determined, and is probably	*/
-	/* not very robust.						*/
-	/* Note that the backing store base seems to be at a nice 	*/
-	/* address minus one page.					*/
-#	define BACKING_STORE_DISPLACEMENT 0x1000000
-#	define BACKING_STORE_ALIGNMENT 0x1000
-#       define BACKING_STORE_BASE \
-	  (ptr_t)(((word)GC_stackbottom - BACKING_STORE_DISPLACEMENT - 1) \
-			& ~(BACKING_STORE_ALIGNMENT - 1))
-#   endif
-#   ifdef LINUX
-#   	define CPP_WORDSZ 64
-#   	define ALIGN_DOUBLE
-	  /* Requires 16 byte alignment for malloc */
-#   	define ALIGNMENT 8
-#       define OS_TYPE "LINUX"
-	/* The following works on NUE and older kernels:	*/
-/* #       define STACKBOTTOM ((ptr_t) 0xa000000000000000l)	*/
-	/* This does not work on NUE:				*/
-#       define LINUX_STACKBOTTOM
-	/* We also need the base address of the register stack	*/
-	/* backing store.  This is computed in 			*/
-	/* GC_linux_register_stack_base based on the following	*/
-	/* constants:						*/
-#       define BACKING_STORE_ALIGNMENT 0x100000
-#       define BACKING_STORE_DISPLACEMENT 0x80000000
-	extern char * GC_register_stackbottom;
-#	define BACKING_STORE_BASE ((ptr_t)GC_register_stackbottom)
-#	define SEARCH_FOR_DATA_START
-#	ifdef __GNUC__
-#         define DYNAMIC_LOADING
-#	else
-	  /* In the Intel compiler environment, we seem to end up with  */
-	  /* statically linked executables and an undefined reference	*/
-	  /* to _DYNAMIC						*/
-#  	endif
-#	define MPROTECT_VDB
-		/* Requires Linux 2.3.47 or later.	*/
-	extern int _end[];
-#	define DATAEND (_end)
-#       ifdef __GNUC__
-#	  define PREFETCH(x) \
-	    __asm__ ("	lfetch	[%0]": : "r"((void *)(x)))
-#	  define PREFETCH_FOR_WRITE(x) \
-	    __asm__ ("	lfetch.excl	[%0]": : "r"((void *)(x)))
-#	  define CLEAR_DOUBLE(x) \
-	    __asm__ ("	stf.spill	[%0]=f0": : "r"((void *)(x)))
-#       endif
-#   endif
-# endif
-
-# ifdef M88K
-#   define MACH_TYPE "M88K"
-#   define ALIGNMENT 4
-#   define ALIGN_DOUBLE
-    extern int etext[];
-#   ifdef CX_UX
-#	define OS_TYPE "CX_UX"
-#       define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
-#   endif
-#   ifdef  DGUX
-#	define OS_TYPE "DGUX"
-	extern char * GC_SysVGetDataStart();
-#       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, etext)
-#   endif
-#   define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
-# endif
-
-# ifdef S370
-#   define MACH_TYPE "S370"
-#   define ALIGNMENT 4	/* Required by hardware	*/
-#   define USE_GENERIC_PUSH_REGS
-#   ifdef UTS4
-#       define OS_TYPE "UTS4"
-        extern int etext[];
-	extern int _etext[];
-	extern int _end[];
-	extern char * GC_SysVGetDataStart();
-#       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, _etext)
-#	define DATAEND (_end)
-#	define HEURISTIC2
-#   endif
-#   ifdef LINUX
-#       define OS_TYPE "LINUX"
-#       define HEURISTIC1
-#       define DYNAMIC_LOADING
-        extern int __data_start[];
-#       define DATASTART ((ptr_t)(__data_start))
-#   endif
-# endif
-
-# if defined(PJ)
-#   define ALIGNMENT 4
-    extern int _etext[];
-#   define DATASTART ((ptr_t)(_etext))
-#   define HEURISTIC1
-# endif
-
-# ifdef ARM32
-#   define CPP_WORDSZ 32
-#   define MACH_TYPE "ARM32"
-#   define ALIGNMENT 4
-#   ifdef NETBSD
-#       define OS_TYPE "NETBSD"
-#       define HEURISTIC2
-        extern char etext[];
-#       define DATASTART ((ptr_t)(etext))
-#       define USE_GENERIC_PUSH_REGS
-#   endif
-#   ifdef LINUX
-#       define OS_TYPE "LINUX"
-#       define HEURISTIC1
-#       undef STACK_GRAN
-#       define STACK_GRAN 0x10000000
-#       define USE_GENERIC_PUSH_REGS
-#       ifdef __ELF__
-#            define DYNAMIC_LOADING
-#	     include <features.h>
-#	     if defined(__GLIBC__) && __GLIBC__ >= 2
-#		 define LINUX_DATA_START
-#	     else
-     	         extern char **__environ;
-#                define DATASTART ((ptr_t)(&__environ))
-			      /* hideous kludge: __environ is the first */
-			      /* word in crt0.o, and delimits the start */
-			      /* of the data segment, no matter which   */
-			      /* ld options were passed through.        */
-			      /* We could use _etext instead, but that  */
-			      /* would include .rodata, which may       */
-			      /* contain large read-only data tables    */
-			      /* that we'd rather not scan.		*/
-#	     endif
-	     extern int _end[];
-#	     define DATAEND (_end)
-#	else
-	     extern int etext[];
-#            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
-#       endif
-#   endif
-#   ifdef MSWINCE
-#     define OS_TYPE "MSWINCE"
-#     define DATAEND /* not needed */
-#   endif
-#   ifdef NOSYS
-      /* __data_start is usually defined in the target linker script.  */
-      extern int __data_start[];
-#     define DATASTART (ptr_t)(__data_start)
-#     define USE_GENERIC_PUSH_REGS
-      /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S  */
-      extern void *__stack_base__;
-#     define STACKBOTTOM ((ptr_t) (__stack_base__))
-#   endif
-#endif
-
-# ifdef SH
-#   define MACH_TYPE "SH"
-#   define ALIGNMENT 4
-#   ifdef MSWINCE
-#     define OS_TYPE "MSWINCE"
-#     define DATAEND /* not needed */
-#   endif
-#   ifdef LINUX
-#     define OS_TYPE "LINUX"
-#     define STACKBOTTOM ((ptr_t) 0x7c000000)
-#     define USE_GENERIC_PUSH_REGS
-#     define DYNAMIC_LOADING
-#     define LINUX_DATA_START
-      extern int _end[];
-#     define DATAEND (_end)
-#   endif
-# endif
- 
-# ifdef SH4
-#   define MACH_TYPE "SH4"
-#   define OS_TYPE "MSWINCE"
-#   define ALIGNMENT 4
-#   define DATAEND /* not needed */
-# endif
-
-#ifdef LINUX_DATA_START
-    /* Some Linux distributions arrange to define __data_start.  Some	*/
-    /* define data_start as a weak symbol.  The latter is technically	*/
-    /* broken, since the user program may define data_start, in which	*/
-    /* case we lose.  Nonetheless, we try both, prefering __data_start.	*/
-    /* We assume gcc.	*/
-#   pragma weak __data_start
-    extern int __data_start[];
-#   pragma weak data_start
-    extern int data_start[];
-#   define DATASTART ((ptr_t)(__data_start != 0? __data_start : data_start))
-#endif
-
-#if defined(LINUX) && defined(REDIRECT_MALLOC)
-    /* Rld appears to allocate some memory with its own allocator, and	*/
-    /* some through malloc, which might be redirected.  To make this	*/
-    /* work with collectable memory, we have to scan memory allocated	*/
-    /* by rld's internal malloc.					*/
-#   define USE_PROC_FOR_LIBRARIES
-#endif
-    
-# ifndef STACK_GROWS_UP
-#   define STACK_GROWS_DOWN
-# endif
-
-# ifndef CPP_WORDSZ
-#   define CPP_WORDSZ 32
-# endif
-
-# ifndef OS_TYPE
-#   define OS_TYPE ""
-# endif
-
-# ifndef DATAEND
-    extern int end[];
-#   define DATAEND (end)
-# endif
-
-# if defined(SVR4) && !defined(GETPAGESIZE)
-#    include <unistd.h>
-#    define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
-# endif
-
-# ifndef GETPAGESIZE
-#   if defined(SUNOS5) || defined(IRIX5)
-#	include <unistd.h>
-#   endif
-#   define GETPAGESIZE() getpagesize()
-# endif
-
-# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
-	    /* OS has SVR4 generic features.  Probably others also qualify.	*/
-#   define SVR4
-# endif
-
-# if defined(SUNOS5) || defined(DRSNX)
-	    /* OS has SUNOS5 style semi-undocumented interface to dynamic 	*/
-	    /* loader.								*/
-#   define SUNOS5DL
-	    /* OS has SUNOS5 style signal handlers.				*/
-#   define SUNOS5SIGS
-# endif
-
-# if defined(HPUX)
-#   define SUNOS5SIGS
-# endif
-
-# if defined(SVR4) || defined(LINUX) || defined(IRIX) || defined(HPUX) \
-	    || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) || defined(DGUX) \
-	    || defined(BSD) || defined(AIX) || defined(MACOSX) || defined(OSF1)
-#   define UNIX_LIKE   /* Basic Unix-like system calls work.	*/
-# endif
-
-# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
-	   -> bad word size
-# endif
-
-# ifdef PCR
-#   undef DYNAMIC_LOADING
-#   undef STACKBOTTOM
-#   undef HEURISTIC1
-#   undef HEURISTIC2
-#   undef PROC_VDB
-#   undef MPROTECT_VDB
-#   define PCR_VDB
-# endif
-
-# ifdef SRC_M3
-	/* Postponed for now. */
-#   undef PROC_VDB
-#   undef MPROTECT_VDB
-# endif
-
-# ifdef SMALL_CONFIG
-	/* Presumably not worth the space it takes. */
-#   undef PROC_VDB
-#   undef MPROTECT_VDB
-# endif
-
-# ifdef USE_MUNMAP
-#   undef MPROTECT_VDB  /* Can't deal with address space holes. */
-# endif
-
-# ifdef PARALLEL_MARK
-#   undef MPROTECT_VDB  /* For now.	*/
-# endif
-
-# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
-#   define DEFAULT_VDB
-# endif
-
-# ifndef PREFETCH
-#   define PREFETCH(x)
-#   define NO_PREFETCH
-# endif
-
-# ifndef PREFETCH_FOR_WRITE
-#   define PREFETCH_FOR_WRITE(x)
-#   define NO_PREFETCH_FOR_WRITE
-# endif
-
-# ifndef CACHE_LINE_SIZE
-#   define CACHE_LINE_SIZE 32	/* Wild guess	*/
-# endif
-
-# if defined(SEARCH_FOR_DATA_START)
-    extern ptr_t GC_data_start;
-#   define DATASTART GC_data_start
-# endif
-
-# ifndef CLEAR_DOUBLE
-#   define CLEAR_DOUBLE(x) \
-		((word*)x)[0] = 0; \
-		((word*)x)[1] = 0;
-# endif /* CLEAR_DOUBLE */
-
-	/* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */
-# if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS)
-#   define GC_SOLARIS_THREADS
-# endif
-
-# if defined(GC_IRIX_THREADS) && !defined(IRIX5)
-	--> inconsistent configuration
-# endif
-# if defined(GC_LINUX_THREADS) && !defined(LINUX)
-	--> inconsistent configuration
-# endif
-# if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)
-	--> inconsistent configuration
-# endif
-# if defined(GC_HPUX_THREADS) && !defined(HPUX)
-	--> inconsistent configuration
-# endif
-# if defined(GC_WIN32_THREADS) && !defined(MSWIN32)
-	    /* Ideally CYGWIN32 should work, in addition to MSWIN32.  I suspect	*/
-	    /* the necessary code is mostly there, but nobody has actually made */
-	    /* sure the right combination of pieces is compiled in, etc.	*/
-	--> inconsistent configuration
-# endif
-
-# if defined(PCR) || defined(SRC_M3) || \
-		defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \
-		defined(GC_PTHREADS)
-#   define THREADS
-# endif
-
-# if defined(HP_PA) || defined(M88K) || defined(POWERPC) && !defined(MACOSX) \
-	     || defined(LINT) || defined(MSWINCE) || defined(ARM32) \
-	     || (defined(I386) && defined(__LCC__))
-		/* Use setjmp based hack to mark from callee-save registers.    */
-		/* The define should move to the individual platform 		*/
-		/* descriptions.						*/
-#	define USE_GENERIC_PUSH_REGS
-# endif
-
-# if defined(SPARC)
-#   define ASM_CLEAR_CODE	/* Stack clearing is crucial, and we 	*/
-					/* include assembly code to do it well.	*/
-# endif
-
-	/* Can we save call chain in objects for debugging?   		        */
-	/* SET NFRAMES (# of saved frames) and NARGS (#of args for each frame)	*/
-	/* to reasonable values for the platform.				*/
-	/* Set SAVE_CALL_CHAIN if we can.  SAVE_CALL_COUNT can be specified at	*/
-	/* build time, though we feel free to adjust it slightly.		*/
-	/* Define NEED_CALLINFO if we either save the call stack or 		*/
-	/* GC_ADD_CALLER is defined.						*/
-#ifdef LINUX
-# include <features.h>
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2
-#   define HAVE_BUILTIN_BACKTRACE
-# endif
-#endif
-
-#if defined(SPARC)
-# define CAN_SAVE_CALL_STACKS
-# define CAN_SAVE_CALL_ARGS
-#endif
-#if defined(I386) && defined(LINUX)
-	    /* SAVE_CALL_CHAIN is supported if the code is compiled to save	*/
-	    /* frame pointers by default, i.e. no -fomit-frame-pointer flag.	*/
-# define CAN_SAVE_CALL_STACKS
-# define CAN_SAVE_CALL_ARGS
-#endif
-#if defined(HAVE_BUILTIN_BACKTRACE) && !defined(CAN_SAVE_CALL_STACKS)
-# define CAN_SAVE_CALL_STACKS
-#endif
-
-# if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \
-	     && defined(CAN_SAVE_CALL_STACKS)
-#   define SAVE_CALL_CHAIN 
-# endif
-# ifdef SAVE_CALL_CHAIN
-#   if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)
-#     define NARGS SAVE_CALL_NARGS
-#   else
-#     define NARGS 0	/* Number of arguments to save for each call.	*/
-#   endif
-# endif
-# ifdef SAVE_CALL_CHAIN
-#   ifndef SAVE_CALL_COUNT
-#     define NFRAMES 6	/* Number of frames to save. Even for		*/
-				/* alignment reasons.				*/
-#   else
-#     define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)
-#   endif
-#   define NEED_CALLINFO
-# endif /* SAVE_CALL_CHAIN */
-# ifdef GC_ADD_CALLER
-#   define NFRAMES 1
-#   define NARGS 0
-#   define NEED_CALLINFO
-# endif
-
-# if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)
-#   define DBG_HDRS_ALL
-# endif
-
-#ifdef GC_PRIVATE_H
-	/* This relies on some type definitions from gc_priv.h, from	*/
-        /* where it's normally included.				*/
-	/*								*/
-	/* How to get heap memory from the OS:				*/
-	/* Note that sbrk()-like allocation is preferred, since it 	*/
-	/* usually makes it possible to merge consecutively allocated	*/
-	/* chunks.  It also avoids unintented recursion with		*/
-	/* -DREDIRECT_MALLOC.						*/
-	/* GET_MEM() returns a HLKSIZE aligned chunk.			*/
-	/* 0 is taken to mean failure. 					*/
-	/* In the case os USE_MMAP, the argument must also be a 	*/
-	/* physical page size.						*/
-	/* GET_MEM is currently not assumed to retrieve 0 filled space, */
-	/* though we should perhaps take advantage of the case in which */
-	/* does.							*/
-	struct hblk;	/* See gc_priv.h.	*/
-# ifdef PCR
-	    char * real_malloc();
-#   define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \
-					  + GC_page_size-1)
-# else
-#   ifdef OS2
-	      void * os2_alloc(size_t bytes);
-#     define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \
-					    + GC_page_size) \
-					    + GC_page_size-1)
-#   else
-#     if defined(NEXT) || defined(MACOSX) || defined(DOS4GW) || \
-		 (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \
-		 (defined(SUNOS5) && !defined(USE_MMAP))
-#       define GET_MEM(bytes) HBLKPTR((size_t) \
-					      calloc(1, (size_t)bytes + GC_page_size) \
-					      + GC_page_size-1)
-#     else
-#	ifdef MSWIN32
-		  extern ptr_t GC_win32_get_mem();
-#         define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
-#	else
-#	  ifdef MACOS
-#	    if defined(USE_TEMPORARY_MEMORY)
-			extern Ptr GC_MacTemporaryNewPtr(size_t size,
-							 Boolean clearMemory);
-#               define GET_MEM(bytes) HBLKPTR( \
-			    GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \
-			    + GC_page_size-1)
-#	    else
-#         	    define GET_MEM(bytes) HBLKPTR( \
-				NewPtrClear(bytes + GC_page_size) + GC_page_size-1)
-#	    endif
-#	  else
-#	    ifdef MSWINCE
-		      extern ptr_t GC_wince_get_mem();
-#	      define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
-#	    else
-#	      if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
-			extern void *GC_amiga_get_mem(size_t size);
-			define GET_MEM(bytes) HBLKPTR((size_t) \
-			  GC_amiga_get_mem((size_t)bytes + GC_page_size) \
-			  + GC_page_size-1)
-#	      else
-			extern ptr_t GC_unix_get_mem();
-#               define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
-#	      endif
-#	    endif
-#	  endif
-#	endif
-#     endif
-#   endif
-# endif
-
-#endif /* GC_PRIVATE_H */
-
-# endif /* GCCONFIG_H */