Re: [boost] Boost threads + MSVSC + /Za + client code

From: Peter Dimov (pdimov_at_[hidden])
Date: 2007-01-03 07:41:39

Anthony Williams wrote:

> The problem is a combination of things.
> boost/config/compiler/visualc.hpp defines BOOST_DISABLE_WIN32 if
> extensions are disabled, presumably since windows.h relies on
> Microsoft compiler extensions. boost/config/suffix.hpp then defines
> BOOST_DISABLE_THREADS if BOOST_DISABLE_WIN32 is defined and
> BOOST_HAS_PTHREADS is not; the implication is that if you can't use
> the Windows headers, then you can't use the Windows thread API, so if
> we haven't got pthread-win32 configured, you can't use Boost threads.

This is incorrect for two reasons. One, you don't have to include a windows 
header in order to use Boost.Threads. Two, the fact that a translation unit 
is built with /Za doesn't automatically make this unit single threaded; 
libraries that depend on BOOST_DISABLE_THREADS (or on the absence of 
BOOST_HAS_THREADS) to disable their internal synchronization will break. 
It's possible to spawn threads without including a windows header.