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 08:23:33

Kevin Arunski wrote:
> On Nov 23, 2010, at 6:07 AM, Yan Wu wrote:
>
> > Hi,
> >
> > I got an error when building OpenOffice.org on Alpha EV6 platform, the
> > error log is as following:
> >
> >
> > Compiling: comphelper/unxlngaxp.pro/misc/comphelp4gcc3_version.c
> > Making: comphelper.lib
> > Making: libcomphelp4gcc3.so
> > ../unxlngaxp.pro/slo/enumberablemap.o: In function
> > 'comphelper
> > ::EnumerableMap
> > ::initialize(com::sun::star::uno::Sequence<com::sun::star::uno::Any>
> > const&)': '__sync_fetch_and_add_4' undefined reference
...
> These functions are built-in functions provided by gcc to implement 
> atomic operations.  For some platforms, these intrinsics were not 
> implemented..  You can either provide an implementation yourself, or  use 
> a newer version of gcc that implements them.

Yes. To disable shared_ptr's use of these intrinsics, #define 
BOOST_SP_USE_PTHREADS.