From 786a5c5e65cf84c6cb2b7eb48f77bad6fc47d071 Mon Sep 17 00:00:00 2001
From: Steven Watanabe <steven@providere-consulting.com>
Date: Thu, 14 Apr 2016 08:49:00 -0600
Subject: [PATCH] If we can't find the python headers and libraries, abort
 configuration.  Otherwise, we would attempt to build Boost.Python
 unconditionally.

---
 src/tools/python.jam | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/tools/python.jam b/src/tools/python.jam
index 0139b033d..3ecd89764 100644
--- a/src/tools/python.jam
+++ b/src/tools/python.jam
@@ -797,13 +797,11 @@ local rule configure ( version ? : cmd-or-prefix ? : includes * : libraries ? :
         }
     }
 
-    # Anything left to compute?
+    # Check whether configuration succeeded.
     if ! ( $(includes) && $(libraries) )
     {
-        version ?= $(fallback-version) ;
-        version ?= 2.5 ;
-        exec-prefix ?= $(prefix) ;
-        compute-default-paths $(target-os) : $(version) : $(prefix:E=) ;
+        debug-message Python headers and libraries not found. ;
+        return ;
     }
     
     .configured = true ;