--- src/usr.sbin/bind/include/isc/platform.h	2007-01-28 06:36:13.000000000 +0900
+++ src/usr.sbin/bind/include/isc/platform.h.new	2007-11-04 09:08:25.000000000 +0900
@@ -219,6 +219,13 @@
  */
 #define ISC_PLATFORM_HAVESYSUNH 1
 
+#if defined(__i386__) || defined(__x86_64__) \
+	|| defined(__sparc__) && defined(_LP64) \
+	|| defined(__alpha__) \
+	|| defined(__powerpc__) && defined(notyet) \
+	|| defined(__mips__) && !defined(_MIPS_ARCH_MIPS1) \
+	|| defined(__ia64__)
+
 /*
  * If the "xadd" operation is available on this architecture,
  * ISC_PLATFORM_HAVEXADD will be defined. 
@@ -242,6 +249,32 @@
  */
 #define ISC_PLATFORM_USEGCCASM 1
 
+#else
+
+/*
+ * If the "xadd" operation is available on this architecture,
+ * ISC_PLATFORM_HAVEXADD will be defined.
+ */
+#undef ISC_PLATFORM_HAVEXADD
+
+/*
+ * If the "atomic swap" operation is available on this architecture,
+ * ISC_PLATFORM_HAVEATOMICSTORE" will be defined.
+ */
+#undef ISC_PLATFORM_HAVEATOMICSTORE
+
+/*
+ * If the "compare-and-exchange" operation is available on this architecture,
+ * ISC_PLATFORM_HAVECMPXCHG will be defined.
+ */
+#undef ISC_PLATFORM_HAVECMPXCHG
+
+/*
+ * Define if gcc ASM extension is available
+ */
+
+#endif
+
 /*
  * Define if Tru64 style ASM syntax must be used.
  */