[Boost-build] ifdefs and defines across different jamfiles

From: Kostas Kostiadis (kos_at_[hidden])
Date: 2007-01-08 08:02:53

Hello all,
 
I think this question is probably best asked with a simple example.
 
Say I have a "framework" project, that uses an "audio" project.
Now say I have an application that uses "framework" but doesn't want to
inlcude "audio" support.
 
I need to:
 
1) detect an EXTERNALY defined define in my "framework" project and
conditionaly allow the inclusion of "audio".
Pseudo code would look like:
 
framework jamfile:
 
#if !defined( EXTERNALY_DEFINED_NO_AUDIO )
use-project /audio : /libs/audio ;
#endif
 
audio jamfile:
 
as normal
 
application jamfile:
 
#define EXTERNALY_DEFINED_NO_AUDIO
 
 
Any ideas on how to do this much appreciated.
 
cheers,
k.