From 6d5303c868403f42f1e2220c28c352fa8647a497 Mon Sep 17 00:00:00 2001
From: gbeauche <>
Date: Sun, 13 Feb 2005 18:18:59 +0000
Subject: [PATCH] Support FreeBSD 5.3: - fix implementation of offsetof() with
 GCC >= 3.4 and C++ code

---
 SheepShaver/src/Unix/sysdeps.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/SheepShaver/src/Unix/sysdeps.h b/SheepShaver/src/Unix/sysdeps.h
index 90f15243..0760c236 100644
--- a/SheepShaver/src/Unix/sysdeps.h
+++ b/SheepShaver/src/Unix/sysdeps.h
@@ -41,6 +41,7 @@
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stddef.h>
 #include <string.h>
 #include <signal.h>
 
@@ -63,6 +64,17 @@
 # endif
 #endif
 
+// Fix offsetof() on FreeBSD and GCC >= 3.4
+#if defined(__FreeBSD__) && defined(__cplusplus)
+#undef offsetof
+/* The cast to "char &" below avoids problems with user-defined
+   "operator &", which can appear in a POD type.  */
+#define offsetof(TYPE, MEMBER)                          \
+  (__offsetof__ (reinterpret_cast <size_t>              \
+                 (&reinterpret_cast <char &>            \
+                  (static_cast<TYPE *> (0)->MEMBER))))
+#endif
+
 // Define for external components
 #define SHEEPSHAVER 1