Re: [Boost-users] boost_3.6 beta: Linking boost serialisation (and other libs) gives duplicate symbol on AIX 5.3 with gcc 4.2.4

From: Andrej van der Zee (mavdzee_at_[hidden])
Date: 2008-07-31 23:10:33

Hi,


> I don't like to force the compiler to behave in a way that is not
> standard compliant.  Or do you mean to force the compiler to
> actually inline all inline functions?  This is impossible for
> virtual functions.

Yes that is what I meant. Somehow the AIX linker does not inline a bunch of inline-functions resulting in these warnings. But  I see now that this is not an option for virtual inline functions (but uhhhh, why would one inline a virtual function anyway? Seems like a contradiction). 

>> 2) Add the native AIX linker option: -bhalt:5 to suppress the warning  

> This is dangerous, since it may suppress real diagnostics, but at least
> it is unlikely to break correct code.

Yes I agree, this is what IBM sais: 
"The -bhalt link editor option specifies the maximum error level for the linking
process to continue, and suppresses any error below the maximum."

>> 3) Explicitely declare inline functions static  

> This can violate the ODR.  It is out of the question as far as I am concerned.

Hmmm, don't follow you here. 

> The linker ought not to be issuing a warning.  I don't suppose there's a
> way to make it shut up without also suppressing legitimate warnings, is 
> there?

Not that I know of, but I have fairly limited experience on AIX. I just have to port a project... 

This is what IBM sais about possible solutions (it is for the AIX compiler xlCC, but the same native linker):
"To have the V5.0 or V6.0 compiler give the non-inlined inline functions internal linkage, specify the-qstaticinlineflag when compiling your source files. Alternatively, the warning messages from ld can be suppressed by specifying the -bhalt:5flag when linking your application."

Well, I guess there is no good solution then.

Cheers,
Andrej


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