malloc without mmap?

[Joe Buehler]

I'm still attempting to narrow down some problems in ksh93.
Is it safe to disable the use of mmap() in malloc.cc?  I want
to try this to see if ksh93 works any better.  The patch I am going
to try is below.
-- 
Joe Buehler

--- winsup/cygwin/malloc.cc	2003-02-11 09:11:15.000000000 -0500
+++ winsup/cygwin/malloc.cc	2003-04-22 08:25:56.000000000 -0400
@@ -247,7 +247,7 @@
  #define MORECORE_FAILURE    ((void*)(-1))

  /* Use the supplied emulation of mmap and munmap */
-#define HAVE_MMAP 1
+#define HAVE_MMAP 0
  #define MUNMAP_FAILURE  (-1)
  #define MMAP_CLEARS 1

@@ -702,7 +702,7 @@
  */

  #ifndef HAVE_MMAP
-#define HAVE_MMAP 1
+#define HAVE_MMAP 0
  #endif

  #if HAVE_MMAP