Re: [boost] Re: Building boost for 64-bit on AIX [shared_ptr & single threading]

From: Christoph Ludwig (cludwig_at_[hidden])
Date: 2005-05-26 17:29:45

On Thu, May 26, 2005 at 03:10:56PM -0500, Rene Rivera wrote:
> Patrik Jonsson wrote:
> >Rene Rivera wrote:
> >
> >>Well that's a single threaded library, it would have "threading-multi" 
> >>in the path if it was multi threaded.
> >>
> >>>ld: 0711-317 ERROR: Undefined symbol: .pthread_mutex_unlock
> >>>ld: 0711-317 ERROR: Undefined symbol: .pthread_mutex_lock
> >>>ld: 0711-317 ERROR: Undefined symbol: .pthread_mutex_init
> >>>ld: 0711-317 ERROR: Undefined symbol: .pthread_mutex_destroy
> >>
> >>
> >>
> >>It's likely that something other than Boost requires pthread. Could 
> >>you find out what that is? It could be libstdc++, or something else..
> >>
[...]
> But more generally I would think that it should not generate *any* 
> locking code when doing a single threaded build.

What happens if you build with BOOST_DISABLE_THREADS explicitly defined? Maybe
the problem discussed in GCC PR#11953
<http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11953> exists on AIX as well? 
(It's only a wil guess since (a) I haven't seen the thread Rene's posting
belongs to and(b) I don't have access to an AIX system.)

The effect of PR#11953 under Linux is similar to what you report: The standard
library defines _REENTRANT in some header included by shared_ptr.hpp which
makes  the smart_ptr library require some pthread symbols - even if you do a
single threaded build. AFAIK the only workaround is to define
BOOST_DISABLE_THREADS. 

Regards

Christoph
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