Bootstrapping on DEC Unix

[Richard Kenner]

    I've seen several reports on this list of "virtual memory exhausted"
    when trying to bootstrap gcc on DEC Unix 4.0x and 3.2x.

I've also seen this.

    Gcc bootstraps fine with --with-gc=simple and also fine with
    --with-gc=page if the HAVE_MMAP* macros are commented out in
    auto-host.h.

and also with the following, which I've been using for quite a while now:

*** ggc-page.c  5 Jan 2002 22:11:21 -0000       1.48
--- ggc-page.c  14 Aug 2002 10:02:48 -0000
*************** static struct globals
*** 355,359 ****
     free list.  This cannot be larger than HOST_BITS_PER_INT for the
     in_use bitmask for page_group.  */
! #define GGC_QUIRE_SIZE 16
 
 
  static int ggc_allocated_p PARAMS ((const void *));
--- 355,359 ----
     free list.  This cannot be larger than HOST_BITS_PER_INT for the
     in_use bitmask for page_group.  */
! #define GGC_QUIRE_SIZE 1
 
 
  static int ggc_allocated_p PARAMS ((const void *));