$NetBSD: patch-ae,v 1.18 2016/11/10 09:26:21 maya Exp $

--- libguile/gc_os_dep.c.orig	2010-12-13 17:25:01.000000000 +0000
+++ libguile/gc_os_dep.c
@@ -132,7 +132,7 @@ typedef int GC_bool;
 #    define NETBSD
 #    define mach_type_known
 # endif
-# if defined(__NetBSD__) && defined(__sparc__)
+# if defined(__NetBSD__) && (defined(__sparc__) || defined(__sparc_v9__))
 #    define SPARC
 #    define NETBSD
 #    define mach_type_known
@@ -304,6 +304,11 @@ typedef int GC_bool;
 #   define NETBSD
 #   define mach_type_known
 # endif
+# if defined(__NetBSD__) && defined(__x86_64__)
+#   define X86_64
+#   define NETBSD
+#   define mach_type_known
+# endif
 # if defined(bsdi) && defined(i386)
 #    define I386
 #    define BSDI
@@ -444,12 +449,12 @@ scm_get_stack_base ()
 /*
  * For each architecture and OS, the following need to be defined:
  *
- * CPP_WORD_SZ is a simple integer constant representing the word size.
+ * CPP_WORDSZ 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 also assume CPP_WORDSZ 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.)
+ * 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)
  *
  * MACH_TYPE is a string representation of the machine type.
  * OS_TYPE is analogous for the OS.
@@ -716,8 +721,6 @@ scm_get_stack_base ()
 /*      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 ((ptr_t) USRSTACK)
 #	ifndef USE_MMAP
 #	    define USE_MMAP
 #	endif
@@ -727,10 +730,18 @@ scm_get_stack_base ()
 #	  define HEAP_START DATAEND
 #       endif
 #	define PROC_VDB
-/*	HEURISTIC1 reportedly no longer works under 2.7.  Thus we	*/
-/* 	switched to HEURISTIC2, eventhough it creates some debugging	*/
-/*	issues.								*/
-#	define HEURISTIC2
+/*	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 */
@@ -1008,6 +1019,21 @@ scm_get_stack_base ()
 #    endif
 # endif
 
+# ifdef X86_64
+#   define MACH_TYPE "X86_64"
+#   define ALIGNMENT 8
+#   define ALIGN_DOUBLE
+#   define CPP_WORDSZ 64
+#   ifdef NETBSD
+#	define OS_TYPE "NETBSD"
+#   endif
+#   if defined(NETBSD)
+#	define HEURISTIC2
+	extern char etext;
+#	define DATASTART ((ptr_t)(&etext))
+#   endif
+#   endif
+
 # ifdef NS32K
 #   define MACH_TYPE "NS32K"
 #   define ALIGNMENT 4