freebsd-ports/security/samhain/files/patch-Makefile.in

--- Makefile.in.orig	2019-10-03 19:26:23 UTC
+++ Makefile.in
@@ -68,7 +68,7 @@ BUILD_NUM = 1
 
 DEFAULT_MAINTAINER = Nobody Nowhere <nobody@example.com>
 
-VFLAG    = @mytclient@
+VFLAG    = @mytclient@ -D__BSD_VISIBLE=1
 SETPWD   = @setpwd_prg@
 STEGIN   = @stegin_prg@
 SAMHAIN  = @sh_main_prg@