From dec841a1f236ea6b73b79c7fb52aa9fc916cb113 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Wed, 16 Apr 2003 17:44:05 +0000
Subject: [PATCH] Don't try to transform a native path for the DocBook DTD/XSL
 if no path was given

[SVN r18267]
---
 boostbook.jam | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/boostbook.jam b/boostbook.jam
index 9e3645bf0..fa202d0bb 100644
--- a/boostbook.jam
+++ b/boostbook.jam
@@ -67,8 +67,14 @@ rule init ( docbook-xsl-dir ? : docbook-dtd-dir ? )
   if ! $(.initialized) 
   {
     $(.initialized) = true ;
-    .docbook-xsl-dir = [ path.make $(docbook-xsl-dir) ] ;
-    .docbook-dtd-dir = [ path.make $(docbook-dtd-dir) ] ;
+    if $(docbook-xsl-dir) 
+    {
+      .docbook-xsl-dir = [ path.make $(docbook-xsl-dir) ] ;
+    }
+    if $(docbook-dtd-dir) 
+    {
+      .docbook-dtd-dir = [ path.make $(docbook-dtd-dir) ] ;
+    }
     local boost-root = [ path.make [ modules.peek : BOOST_ROOT ] ] ;
     .boostbook-xsl-dir = [ path.join $(boost-root) tools boostbook xsl/ ] ;
     .boostbook-dtd-dir = [ path.join $(boost-root) tools boostbook dtd/ ] ;