Ar an t-ochtú lá is fiche de mí na Nollaig, scríobh Jerry James: 
 Adding Jeff Sparkes to the conversation.  One of you please clue me
in
 if there is an active mailing list I need to re-sign up for. 
See other communication, 
https://lists.xemacs.org/ to sign up.
 On Thu, Dec 28, 2017 at 5:45 PM, Jerry James
<loganjerry(a)gmail.com> wrote:
 > Well, doggone, it only fixed ppc64le.  Both big endian architectures,
 > ppc64 and s390x, now exhibit some kind of memory failure on startup,
 > so I appear to have introduced an assumption of little endianness in
 > something I just did.  I'll sort that out next....
 
 No, it wasn't me.  Building on big endian architectures was broken by
 this commit:
 
 changeset:   6384:c6e0b59281cb
 user:        Jeff Sparkes <jsparkes(a)gmail.com>
 date:        Mon Apr 26 07:15:04 2010 -0400
 summary:     Use G_BIG_ENDIAN instead of WORDS_BIGENDIAN.
 
 Specifically, src/lisp-union.h requires WORDS_BIGENDIAN to layout a
 Lisp object properly, which is the cause of the breakage I am seeing
 now.  It looks like somebody merged a GTK branch into master, is that
 what I'm seeing?  Because this commit is from going on 8 years ago.
 
 A grep shows that there are more instances of WORDS_BIGENDIAN in
 src/md5.c, src/glyphs-x.c, and src/redisplay-x.c.
 
 Was that merge supposed to make building with either gtk2 or gtk3
 work?  I get build failures with both.  I'm wondering if that is
 expected or not.  Let me know if it is not expected and I will provide
 details. 
Yes, it was. Building on GTK2 and GTK3 work with warnings but without
problems for me. Please give details if it doesn’t work for you.
I have undone Jeff’s change to config.h.in, and now WORS_BIGENDIAN is
available again. Thanks for reporting this!
-- 
‘As I sat looking up at the Guinness ad, I could never figure out /
How your man stayed up on the surfboard after forty pints of stout’
(C. Moore)