$NetBSD: patch-aa,v 1.3 2009/03/06 15:17:07 wiz Exp $

a2x uses the '-u' argument to cp, which POSIX does not specify:
  http://www.opengroup.org/onlinepubs/009695399/utilities/cp.html

Filed upstream on 20080609 as
https://sourceforge.net/tracker/index.php?func=detail&aid=1989227&group_id=67797&atid=519005

--- a2x.orig	2008-12-31 02:46:28.000000000 +0000
+++ a2x
@@ -415,7 +415,7 @@ function copy_stylesheet()
     if [[ "$src" -ef "$dst" ]]; then
         return
     fi
-    execute_command_2 "cp -u \"$src\" \"$dst\""
+    execute_command_2 "cp \"$src\" \"$dst\""
 }
 
 # Copy distribution admonition and navigation icons to destination directory
@@ -441,7 +441,7 @@ function copy_icons()
     else
         execute_command_2 "mkdir -p \"$dst\""
     fi
-    execute_command_2 "cp -rfu  \"$src/\"* \"$dst\""
+    execute_command_2 "cp -rf  \"$src/\"* \"$dst\""
 }
 
 # Run xmllint(1) checking of $1 file if xmllint checking is enabled.