Re: [Boost-bugs] [Boost C++ Libraries] #7090: Provide an option to parse only preprocessor directives

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7090: Provide an option to parse only preprocessor directives
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-07-21 15:00:48

#7090: Provide an option to parse only preprocessor directives
----------------------------------+-----------------------------------------
  Reporter:  scrawl123@…          |       Owner:  hkaiser     
      Type:  Feature Requests     |      Status:  closed      
 Milestone:  To Be Determined     |   Component:  wave        
   Version:  Boost 1.49.0         |    Severity:  Optimization
Resolution:  wontfix              |    Keywords:              
----------------------------------+-----------------------------------------

Comment (by hkaiser):

 Replying to [comment:9 scrawl <scrawl123@…>]:
 > Discovered an issue with mcpp, the #line directives are not GLSL
 compliant; then i looked at glcpp from mesa, but there it doesn't emit
 #line directives at all. I don't feel like hacking with a horrible bulk of
 C-code, so I guess I'm back to using boost::wave.

 Cool.

 > From what I can tell, in order to disable threading, I should add the
 files libs/wave/*.cpp to my project,

 Yes.

 > and modify the includes to use my own wave_config.hpp instead of the one
 from the boost sources? Is that correct?

 There is no need to modify the sources. If you look at `wave_config.hpp`
 you'll see that all configuration constants (such as threading) are
 handled as
 {{{
 #if !defined(BOOST_WAVE_SUPPORT_THREADING)
 #if defined(BOOST_HAS_THREADS)
 #define BOOST_WAVE_SUPPORT_THREADING 1
 #else
 #define BOOST_WAVE_SUPPORT_THREADING 0
 #endif
 #endif
 }}}
 Thus all you have to do is to pass `-DBOOST_WAVE_SUPPORT_THREADING=0` on
 the commandline while compiling.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7090#comment:10>
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