Re: [boost] Boost 1.29.0 recursive_mutex With gcc On Linux

From: John Maddock (jm_at_[hidden])
Date: 2002-12-21 08:51:34

> > I guess we could check for the _XOPEN_SOURCE value in posix_features.hpp
as
> > well as for _XOPEN_VERSION, maybe this is the right thing to do for all
> > Unixes, I don't know, anyone any ideas?
>
>
http://www.opengroup.org/onlinepubs/007904975/functions/xsh_chap02_02.html#t
ag_02_02_01_01
>
> According to the above link a XSI conformant application should define
> _XOPEN_SOURCE and set it to 600. So it should be defined in all posix
> compliant unices. But as you said, this should not be defined in boost
> headers as this doesn't guarantee that all system headers one may use will
> have the same feature set defined. An FAQ in the threads documentation
seems
> like the least boost can do about it. Even better, albeit intrusive, if
> _XOPEN_SOURCE is not defined posix_features.hpp emits a  warning pointing
the
> user to the docs and advise him to define _XOPEN_SOURCE = 600 when
compiling
> his application.

Agreed.

John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/index.htm