$NetBSD: patch-af,v 1.2 2006/01/20 20:40:19 jmmv Exp $

--- boost/config/platform/bsd.hpp.orig	2005-08-24 17:45:17.000000000 +0200
+++ boost/config/platform/bsd.hpp
@@ -23,6 +23,10 @@
 #define BOOST_PLATFORM "DragonFly " BOOST_STRINGIZE(__DragonFly__)
 #endif
 
+#if defined(__DragonFly__)
+#define _REENTRANT 1
+#endif
+
 //
 // is this the correct version check?
 // FreeBSD has <nl_types.h> but does not
@@ -36,20 +40,20 @@
 // FreeBSD 3.x has pthreads support, but defines _POSIX_THREADS in <pthread.h>
 // and not in <unistd.h>
 //
-#if defined(__FreeBSD__) && (__FreeBSD__ <= 3)
+#if defined(__DragonFly__) || defined(__FreeBSD__) && (__FreeBSD__ <= 3)
 #  define BOOST_HAS_PTHREADS
 #endif
 
 //
 // No wide character support in the BSD header files:
 //
-#if !(defined(__FreeBSD__) && (__FreeBSD__ >= 5))
+#if !((defined(__FreeBSD__) && (__FreeBSD__ >= 5))) && !defined(__DragonFly__)
 #  define BOOST_NO_CWCHAR
 #endif
 //
 // The BSD <ctype.h> has macros only, no functions:
 //
-#if !defined(__OpenBSD__)
+#if !defined(__OpenBSD__) && !defined(__DragonFly__)
 #  define BOOST_NO_CTYPE_FUNCTIONS
 #endif