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From Martin Sebor <se...@roguewave.com>
Subject Re: _RWSTD_LIB_SRC macro is not #defined in src/export.cpp
Date Mon, 10 Dec 2007 07:22:59 GMT


Farid Zaripov-2 wrote:
> 
> From: Martin Sebor [mailto:sebor@roguewave.com]
> To: stdcxx-dev@incubator.apache.org
> Subject: Re: _RWSTD_LIB_SRC macro is not #defined in src/export.cpp
> 
>> The _RWSTD_INSTANTIATE_TEMPLATES part is an implementation detail
>> of _RWSTD_LIB_SRC. If we were to add another detail like that we'd
>> have to also remember to update export.cpp. That seems just as
>> brittle as what we're doing now (i.e., not #defining _RWSTD_LIB_SRC).
> 
>> 
>>   The #define _RWSTD_LIB_SRC in every library src file is needed
>> for the implementing the autolinking feature on MSVC.
> 
>> I see. You're adding a #pragma comment to _config.h that expands
>> when _RWSTD_LIB_SRC is #defined and you need it to expand in all
>> library sources, correct?
>  
>   No. The #pragma comment directive should be expanded only in user's
> source files (actually it's enough to expand this directive in only one
> source file of the user's project, but we can't handle this).
>  
>   At the same time #pragma comment shouldn't expanded in library source
> files, elsewere the linker will search libstdxx.lib while linking the
> library
> itself and will fail with the error "libstdxx.lib not found".
> 
> 

Okay, I get it, thanks.


Farid Zaripov-2 wrote:
> 
>  
>   The negative effect of the using autolinking feature is the case when
> user
> uses the some part of the library, that fully implemented in header files
> and the user don't have to link its project with stdcxx library, but
> #pragma comment will force the linker to search and use the specified
> library.
> For that case there handled _RWSTD_NO_EXT_AUTOLINK macro.
> 
> Farid.
>  
> 
> 

I don't think we need to worry about this case. AFAIK, most of the time
the library is required.

Martin
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