Re: [boost] Re: GCC 3.4 lpthread warnings

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-06-30 07:05:05

John Maddock wrote:

> > BTW, I was told that if boost/config.hpp is included before any system
> > headers, it will still be able to use _REENTRANT to detect if -pthread
> > was specified on the command line.
>
> Yep, but if -pthread is specified on the command line, then presumably the
> user really does want thread safe code :-)

Right. The current problem is that _REENTRANT is always defined by libstdc++ 
headers, so we can't use it to detect if user has specified -pthread. 
However, if boost/config.hpp is included before system headers and checks for 
_REENTRANT before including system headers on its own, it can reliably check 
if -pthread was specified. Of course, the requirements to include 
boost/config.hpp before everything else is a drastic one.

- Volodya