Re: [Boost-users] undefined reference to `__sync_fetch_and_add_4'

Subject: Re: [Boost-users] undefined reference to `__sync_fetch_and_add_4'
From: Birju Prajapati (Birju.Prajapati_at_[hidden])
Date: 2009-04-24 18:10:04

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Vladimir Prus
> Sent: 24 April 2009 18:30
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] undefined reference to
`__sync_fetch_and_add_4'
> 
> Peter Dimov wrote:
> 
> > Vladimir Prus:
> >> Peter Dimov wrote:
> >
> > ...
> >
> >>> This could be caused by an issue we've identified recently of
libstdc++
> >>> standard headers using __sync_fetch_and_add as part of their
reference
> >>> counted implementation of std::string and std::locale.
> >>
> >> Or probably by the fact that -m32 was not, in fact, passed to
compiler
> >> when building boost.
> >
> > The original post stated:
> >
> >> I built boost 1.38 as so:
> >>
> >> bjam architecture=x86 address-model=32 --stagedir=stage32
> >> --with-filesystem --with-thread --with-signals --with-serialization
> >> --with-system --with-program_options --with-date_time stage
> >
> > so I assumed that address-model=32 does pass -m32 to g++.
> 
> It should, but I don't have any other theory why -march=i686 might
> have changed anything. Maybe, an obsolete Boost.Build version was
> installed on machine -- and does not ever pass -m32 explicitly.
> 
>         bjam -n -a <other option>

It was a bit of a long shot, I stumbled across these clues:
http://archives.devshed.com/forums/development-94/new-undefined-referenc
e-to-sync-fetch-and-add-4t-1971252.html
http://www.mail-archive.com/[e-mail]/msg00050.html
http://markmail.org/message/dnxjspjzyrbwzqhm

And looked into gcc.jam, which defaults to i386. So I realised that
instead of passing -march=iN86 (where i> 3) to linking my app, I should
try to pass it to bjam when building boost, namely 'instruction-set'

By the way, my bjam version:
birju_at_xx:~/Downloads/boost_1_38_0$ bjam --help
Boost.Build V2 (Milestone 12)
Boost.Jam 03.1.16
....blah....

> 
> will tell for sure.
> 
> - Volodya
> 
> 
> 
> 
> 
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