Re: [Boost-build] PCH question

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-10-16 02:35:10

On Monday 16 October 2006 08:29, Alex Besogonov wrote:
> Vladimir Prus wrote:
> >    #if defined(BOOST_BUILD_PCH_ENABLED)
> >    #include "pch.h"
> >    #endif
> > Then, if toolset lacks PCH support, the pch header won't be included at
> > all. Thoughts?
>
> It won't work in MSVS. PCH header must be the first preprocessor
> directive in file.

Drats! But can you then wrap the entire "pch.hpp" content in #if 
defined(BOOST_BUILD_PCH_ENABLED)?

That way, when PCH is disabled, the pch.hpp will be still included, but it 
won't have negative effect on compilation speed?

- Volodya