From 4a9f5500c4daf8ed1573c41051ff23d5ea15d225 Mon Sep 17 00:00:00 2001
From: Nick Briggs <nicholas.h.briggs@gmail.com>
Date: Mon, 24 Jul 2023 20:43:25 -0700
Subject: [PATCH] struct buf is missing definition for byte-swapped bigvm case
 (#477)

While there was a definition for the pre-bigvm case, with 24-bit
pointers, for byteswapped (little-endian) systems, there was no
structure definition for the bigvm case, with 28-bit pointers.
---
 src/gcfinal.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/gcfinal.c b/src/gcfinal.c
index d49f8fc..76d3bcf 100644
--- a/src/gcfinal.c
+++ b/src/gcfinal.c
@@ -97,6 +97,18 @@ struct buf {
 };
 #endif /* BIGVM */
 #else
+#ifdef BIGVM
+struct buf {
+  LispPTR filepage;
+  LispPTR vmempage;
+  LispPTR buffernext;
+  unsigned sysnext : 28;
+  unsigned unused : 1;
+  unsigned iodirty : 1;
+  unsigned usermapped : 1;
+  unsigned noreference : 1;
+};
+#else
 struct buf {
   LispPTR filepage;
   LispPTR vmempage;
@@ -107,6 +119,7 @@ struct buf {
   unsigned usermapped : 1;
   unsigned noreference : 1;
 };
+#endif /* BIGVM */
 #endif /* BYTESWAP */
 
 /************* The following procedure is common !! **************************/