Swap Partitions (again)

[Scott Henry]

In article <1308 at acf5.NYU.EDU>, sabbagh at acf5.NYU.EDU (sabbagh) writes:
|> 
|> In article <9010201727.AA15683 at UZI.MIT.EDU>:
|> >I'm trying to build GNU EMACS on a PI.  I have successfully built it before
|> >on a 4D80, but here I've not been able to successfully do the final temacs
|> >statement -- which the PROBLEMS file tells me is because I have insufficient
|> >swap space.  This seems very possible to me, but I don't know how to increase
|> >the amount of swap space I have to complete the compilation.
|> >Any descriptions of how swap space works would be appreciated.
|> >Thanks,
|> >Eugene Gholz
|> >(eugholz at athena.mit.edu)
|> 
|> I had this very problem this morning!  I have concluded that it is yet
|> another "feature" of IRIX 3.3.1.  In the past, I was able to build
|> emacs 18.52 on a Personal Iris under 3.2.  Unfortunately, due to an 
|> extremely bad installation procedure (another story) and minimal back up
|> (my fault) I had to rebuild emacs under 3.3.1; there was not enough 
|> swap space.

I think that I should have posted, instead of just e-mailing so as to stop the propogation of rumours. Here's the scoop on GNU Emacs and Irix 3.3+ (a subset of something I posted a month or so ago):


Between 3.2.* and 3.3, the loader no longer ignored errors in the a.out
header that GNU Emacs took advantage of. I am told that that was
un-done in 3.3.1. It mostly meant that a _stripped_ 3.2 binary would
fail to load under 3.3, an unstripped one would appear to work fine. In
addition, a change was made in libc.a for POSIX compliance: getwd() was
defined, but in terms of getcwd() (or something like that). Emacs
assumes by default that a system doesn't have getcwd(), and defines one
interms of getwd(). Hence, an inifinite recursion loop is generated,
and Emacs (temacs) core-dumps when it hits process limits while building
the final executable (xemacs & emacs-18.55.??).

2 solutions:

1) Get 18.56 (should be available any day now, I understand) -- I tested
   it to ensure that it compiles out-of-the-box under 3.3.1.

2) Add the following lines to either .../src/config.h or .../src/m-iris-4d.h:

/*
 * Irix 3.3 defines this, and causes an infinite loop when trying to dump.
 */
#define HAVE_GETWD

and (if you are running 3.3 instead of 3.3.1), apply the following
patch to .../src/unexmips.c (a 1-line change):

*** unexmips.c.orig	Thu Jan 12 16:14:05 1989
--- unexmips.c	Mon Jul 30 22:10:10 1990
***************
*** 255,261 ****
    rdata_section->s_size = data_start - DATA_START;
    data_section->s_vaddr = data_start;
    data_section->s_paddr = data_start;
!   data_section->s_size = brk - DATA_START;
    data_section->s_scnptr = rdata_section->s_scnptr + rdata_section->s_size;
    vaddr = data_section->s_vaddr + data_section->s_size;
    scnptr = data_section->s_scnptr + data_section->s_size;
--- 255,261 ----
    rdata_section->s_size = data_start - DATA_START;
    data_section->s_vaddr = data_start;
    data_section->s_paddr = data_start;
!   data_section->s_size = brk - data_start;
    data_section->s_scnptr = rdata_section->s_scnptr + rdata_section->s_size;
    vaddr = data_section->s_vaddr + data_section->s_size;
    scnptr = data_section->s_scnptr + data_section->s_size;
*** s-irix3_3.h.orig	Mon Jul 30 22:10:10 1990
--- s-irix3_3.h	Mon Jul 30 23:04:30 1990
***************

-- 
 Scott Henry <scotth at sgi.com> / Traveller on Dragon Wings
 Information Services,       / Help! My disclaimer is missing!
 Silicon Graphics, Inc      / 'Under-achiever and proud of it!' -- Bart Simpson