Link Problem

Steven Schveighoffer schveiguy at
Tue Mar 3 15:04:42 PST 2009

"Qian Xu" wrote
> Hi All (again),
> I got the following error message when my program is going to be linked:
> ------------------------ error -------------------------------
> default/common/configuration/Configuration_1.o:(.data+0x98): undefined 
> reference to `_D5tango4text3xml9SaxParser12_ModuleInfoZ'
> ------------------------ error -------------------------------
> Configuration_1.o is the output file of my source.
> I compiled my program on two Linux machines. It works on one machine, but 
> not the other.
> I suppose:
> 1. the tango libraries are different. (I will verify it tomorrow in my 
> office)
> 2. the SaxParser contains some template implementation. how this part is 
> compiled? can this be a reason of my problem?
> BTW: What is ModuleInfoZ?? I have not found it in SaxParser.d at all.

ModuleInfo is the instance of the ModuleInfo class that the compiler 
generates for a d source file.  Every compiled file has one.

this shows all ModuleInfo instances in tango:
nm libtango*.a | grep ModuleInfo

It appears that the SaxParser module is not defined in the library.  I would 
guess that your tango lib is not compiled from the .d files you are using 
for imports, one of those two is out of date.


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