$NetBSD: patch-am,v 1.1.1.1 2008/06/21 23:15:28 adrianp Exp $

--- config.threads.in.orig	2005-03-16 07:59:16.000000000 +0900
+++ config.threads.in
@@ -48,6 +48,8 @@ case $host in
 	use_threads=false ;;
 *-freebsd*)
 	use_threads=false ;;
+*-dragonfly*)
+	use_threads=false ;;
 *-bsdi[234]*)
 	# Thread signals do not work reliably on some versions of BSD/OS.
 	use_threads=false ;;
@@ -121,7 +123,7 @@ then
 				AC_MSG_RESULT(native)
 				LIBS="-lpthread $LIBS"
 			else
-				if test ! -d $LOCALBASE/pthreads
+				if test ! -d $LOCALBASE/pthreads -a ! -f /usr/include/pthread.h
 				then
 					AC_MSG_RESULT(none)
 					AC_MSG_ERROR("could not find thread libraries")
@@ -129,13 +131,21 @@ then
 
 				if $use_threads
 				then
-					AC_MSG_RESULT(mit-pthreads/unproven-pthreads)
-					pkg="$LOCALBASE/pthreads"
-					lib1="-L$pkg/lib -Wl,-R$pkg/lib"
-					lib2="-lpthread -lm -lgcc -lpthread"
-					LIBS="$lib1 $lib2 $LIBS"
-					CPPFLAGS="$CPPFLAGS -I$pkg/include"
-					STD_CINCLUDES="$STD_CINCLUDES -I$pkg/include"
+					if test -f /usr/include/pthread.h
+					then
+						AC_MSG_RESULT(native pthreads)
+						LIBS="-lpthread $LIBS"
+						CPPFLAGS="$CPPFLAGS -I/usr/inclue"
+						STD_CINDLUES="$STD_CINDLUES -I/usr/include"
+					else
+						AC_MSG_RESULT(mit-pthreads/unproven-pthreads)
+						pkg="$LOCALBASE/pthreads"
+						lib1="-L$pkg/lib -Wl,-R$pkg/lib"
+						lib2="-lpthread -lm -lgcc -lpthread"
+						LIBS="$lib1 $lib2 $LIBS"
+						CPPFLAGS="$CPPFLAGS -I$pkg/include"
+						STD_CINCLUDES="$STD_CINCLUDES -I$pkg/include"
+					fi
 				fi
 			fi
 		fi