Re: [Boost-build] [BBv2] Pre-compiled header (PCH) support

From: Alexey Pakhunov (alexeypa_at_[hidden])
Date: 2005-11-20 10:26:45

Reece Dunn wrote:

>> I have attached a patch to add PCH support to the msvc toolset. This 
>> is most likely the most complex toolset to get PCH support on, so 
>> extending this for other toolsets should be trivial.
>
There is one more problem. If a target that uses PCH depends on another 
target using PCH the top most one gets two <pch-header> and two 
<pch-file> properties - one from each target. For example:

---- core/jamfile.v2 ----
pch stdafx
  :
    stdafx.h stdafx.cpp
  ;

lib core
  :
     stdafx
     ...
  :
     <link>shared
  ;
----
---- client/jamfile.v2 ----
pch stdafx
  :
    stdafx.h stdafx.cpp
  ;
lib client
  :
     stdafx
     ...
     ../core//core
  :
     <link>shared
  ;
----
I'm trying to find a way to remove <pch-xxx> properties from usage 
requirements of LIB, SHARED_LIB, EXE and  such targets. Maybe there is a 
better way of doing it.
Best regards/Venlig hilsen,
  Alexey Pakhunov.