namespace problem?

[AYDOS Carlos C <Ca...@rta.nsw.gov.au>]

Hi,

 

I am a newbie in Xerces-C++. I managed to write my first few
applications without any problems. But I am having problems to write a
plugin (dll) to a third party application. This third party application
uses Xerces 2.7.0. My dll also uses Xerces 2.7.0 but for totally
different purposes. As I do not know the internals of the application I
cannot figure out what is happening, but the application returns an
error when tries to link to my dll function specifically where I
initialize Xerces. If I use Xerces 2.6.0 (a different version) for my
plugin, everything seems to work ok. This is a good temporary solution,
but I would like to know what is going on. So I guess I am forgetting to
declare something, define perhaps a namespace, etc. Does anyone have an
idea of what I might be doing wrong? The application developers told me
they use XERCES_CPP_NAMESPACE_USE and so do I on my plugin.

 

Carlos


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Re: namespace problem?

[David Bertoni <db...@apache.org>]

AYDOS Carlos C wrote:
> Hi,
> 
>  
> 
> I am a newbie in Xerces-C++. I managed to write my first few
> applications without any problems. But I am having problems to write a
> plugin (dll) to a third party application. This third party application
> uses Xerces 2.7.0. My dll also uses Xerces 2.7.0 but for totally
> different purposes. As I do not know the internals of the application I
> cannot figure out what is happening, but the application returns an
> error when tries to link to my dll function specifically where I
> initialize Xerces. If I use Xerces 2.6.0 (a different version) for my
> plugin, everything seems to work ok. This is a good temporary solution,
> but I would like to know what is going on. So I guess I am forgetting to
> declare something, define perhaps a namespace, etc. Does anyone have an
> idea of what I might be doing wrong? The application developers told me
> they use XERCES_CPP_NAMESPACE_USE and so do I on my plugin.
Using XERCES_CPP_NAMESPACE_USE has no affect on the actual C++ namespace 
for the Xerces-C version you're using.  This sounds like a conflict between 
how the other library is using Xerces-C and how your plugin is using it.

If you can't find out any details about how the other application is using 
Xerces-C, then your best bet is to build a custom version using a unique 
file name, and a unique C++ namespace. For example, you might append a 
string of characters to both the file name and the C++ namespace that 
associate it with your application.

Dave