Re: [boost] [boost.atomic] linker error with gcc 4.1.2

Subject: Re: [boost] [boost.atomic] linker error with gcc 4.1.2
From: Jamie Allsop (ja11sop_at_[hidden])
Date: 2010-03-04 19:23:05

Helge Bahmann wrote:
> Hi Jamie,
> 
> On Wed, 3 Mar 2010, Jamie Allsop wrote:
> 
>> With gcc 4.1.2 (gcc 4.3.x is fine) I am seeing this linker error:
>>
>> .build/debug/working/SourceOne.o:
>> In function `void 
>> boost::detail::atomic::platform_atomic_thread_fence<boost::memory_order>(boost::memory_order)': 
>>
>> /thirdparty/boost/boost_1_42/boost/smart_ptr/detail/shared_count.hpp:229: 
>> multiple definition of `void 
>> boost::detail::atomic::platform_atomic_thread_fence<boost::memory_order>(boost::memory_order)' 
>>
>> .build/debug/working/SourceTwo.o:
>> /thirdparty/boost/boost_1_42/boost/atomic/detail/gcc-x86.hpp:63: first 
>> defined here
> 
> [...]
> 
>> Is this a compiler error or should the specialisation be declared as:
>>
>> template<>
>> inline void platform_atomic_thread_fence(memory_order order)
> 
> you are right, it should have been specialized this way. I have however 
> reorganized my development tree such that this is now handled 
> differently (macros instead of via template specialization), so if you 
> are patient until saturday, this will be resolved.

I patched my copy locally so no rush for me. However I'm curious as to 
why you'd use a macro when a template would do? Or is it that your 
changes preclude using templates or other language facilities? I guess I 
can have a look on Saturday ;)

Thanks for the response,
Jamie