From ab07ba65231796824cb7da8cd1fa68821bade33d Mon Sep 17 00:00:00 2001
From: Rene Rivera <grafikrobot@gmail.com>
Date: Sat, 24 Nov 2007 02:16:50 +0000
Subject: [PATCH] Allow use of "conditional" to multiply a condition that
 already has the full condition in it.

[SVN r41324]
---
 v2/build/project.jam | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/v2/build/project.jam b/v2/build/project.jam
index 92d4a958a..ec9826828 100644
--- a/v2/build/project.jam
+++ b/v2/build/project.jam
@@ -1007,7 +1007,15 @@ module project-rules
     #
     rule conditional ( condition + : requirements * )
     {
-        return $(condition:J=,):$(requirements) ;
+        local condition = $(condition:J=,) ;
+        if [ MATCH (:) : $(condition) ]
+        {
+            return $(condition)$(requirements) ;
+        }
+        else
+        {
+            return $(condition):$(requirements) ;
+        }
     }
 }