Index: head/cad/klayout/files/patch-src-layApplication.cc
===================================================================
--- head/cad/klayout/files/patch-src-layApplication.cc	(revision 425590)
+++ head/cad/klayout/files/patch-src-layApplication.cc	(revision 425591)
@@ -1,19 +1,19 @@
 --- src/layApplication.cc.orig	2016-06-20 01:35:29.000000000 +0900
 +++ src/layApplication.cc	2016-11-05 04:21:44.257764000 +0900
 @@ -20,6 +20,7 @@
  
  */
  
 +#include <sys/param.h>
  
  #include "layApplication.h"
  #include "layConfig.h"
 @@ -351,7 +352,7 @@
    act.sa_sigaction = signal_handler;
    sigemptyset (&act.sa_mask);
    act.sa_flags = SA_SIGINFO;
 -#if !defined(__APPLE__)
-+#if !defined(__APPLE__) && !defined(__FreeBSD__)
++#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__DragonFly__)
    act.sa_restorer = 0;
  #endif