Index: src/runtime/Kernel/collector.c
===================================================================
RCS file: /home/cvs/root/nhc98/src/runtime/Kernel/collector.c,v
retrieving revision 1.24
retrieving revision 1.26
diff -u -r1.24 -r1.26
--- src/runtime/Kernel/collector.c	7 Mar 2005 16:53:38 -0000	1.24
+++ src/runtime/Kernel/collector.c	28 Mar 2006 09:21:11 -0000	1.26
@@ -9,6 +9,7 @@
 
 /*#define HEAPSIZE 100000  -- defined in top-level Makefile at config-time */
 #define GCSTACKSIZE 20000
+#define SBRK 1	/* Use sbrk(2) instead of malloc(3) to allocate the heap */
 
 WHEN_DYNAMIC(int ractive = 0;)
 
@@ -46,7 +47,13 @@
   Int totalSize = hpSize+spSize;
   Int tableSize = (totalSize+WORDSIZE)/(WORDSIZE+1)+1; /* Last one for end of marked */
 
-  if(NULL == (hpStart = malloc ((int)totalSize * sizeof(Node)))) {
+  if (
+#if SBRK
+      ((NodePtr)-1)== (hpStart = (NodePtr)sbrk((int)totalSize * sizeof(Node)))
+#else
+      NULL == (hpStart = malloc ((int)totalSize * sizeof(Node)))
+#endif
+     ) {
     fprintf(stderr,"Not enough memory for heap and stack.\n");
     exit(-1);
   }