Re: [Boost-users] undefined references '__sync_fetch_and_add_4 'for Boost_1_39_0 on Alpha platform

Subject: Re: [Boost-users] undefined references '__sync_fetch_and_add_4 'for Boost_1_39_0 on Alpha platform
From: Peter Dimov (pdimov_at_[hidden])
Date: 2010-11-23 11:21:06

Yan Wu wrote:
> > Yes. To disable shared_ptr's use of these intrinsics, #define
> > BOOST_SP_USE_PTHREADS.
> >
> Thanks for your kindly replies. It's a little difficult to implement
> the atomic operations by myself;-)
> Where should the macro  BOOST_SP_USE_PTHREADS be defined ? Which file
> in boost or the file in my comphelper.cxx?

You need to define it in each cpp/cxx file that uses shared_ptr. The safest 
way to do that is to define it globally for the project by, for example, 
adding -DBOOST_SP_USE_PTHREADS to the build flags.