SOURCE Hi,

On Tue, Jan 18, 2005 at 03:49:17PM +0100, Andreas Huber wrote:
>  >From boost/config/stdlib/libstdcpp3.hpp:
>  
>  <quote>
>  #ifdef __GLIBCXX__ // gcc 3.4 and greater:
>  #  ifdef _GLIBCXX_HAVE_GTHR_DEFAULT
>       //
>       // If the std lib has thread support turned on, then turn it on in 
>  Boost
>       // as well.  We do this because some gcc-3.4 std lib headers 
>  define _REENTANT
>       // while others do not...
>       //
>  #     define BOOST_HAS_THREADS
>  #  else
>  #     define BOOST_DISABLE_THREADS
>  #  endif
>  #endif
>  </quote>
>  
>  I suspect this means that ST builds are no longer possible on some GCC 
>  platforms (I'm using MinGW). Could someone please confirm or deny this?

builds without MT support are still possible but you need to explicitly define
BOOST_DISABLE_THREADS (either via the compiler command line option or via your
own version of boost/config/user.hpp). 

Yes, it is annoying, but given that gcc 3.4 does not provide a way to detect
at compile time whether the option `-pthread' (or whatever it is on your
platform) is present on the compiler command line, there seems to be no better
solution. The corresponding PR in the gcc bug tracking system 
<URL:http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11953>  did not see much
activity lately whence I entertain some doubt whether there will be a
resolution before gcc 4.0.

Christoph
-- 
http://www.informatik.tu-darmstadt.de/TI/Mitarbeiter/cludwig.html
LiDIA: http://www.informatik.tu-darmstadt.de/TI/LiDIA/Welcome.html

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