Re: [boost] [regex] Link problem with VC8 regex build

From: simon.sebright_at_[hidden]
Date: 2007-01-05 04:23:45

> simon.sebright_at_[hidden] wrote:
> > Hi,
> >
> > I have built the regex library as per instructions, using a command 
> > prompt set up by Visual Studio.  When I come to build my 
> project using 
> > the library, it automaticaly pulls in the regex lib file, but I get 
> > multiple defined symbols from the linker:
> 
> > My app is built with wchar_t as unsigned short, and with 
> UNICODE and 
> > _UNICODE defined, so I updated the makefile for this and 
> rebuilt, but 
> > I just get the same thing.
> >
> > I can't even see how usinstances.cpp or any other file 
> defines these 
> > things, and searching boost and the web reveals nothing.  
> Any ideas, 
> > anyone?
> 
> It's known issue: 
> http://sourceforge.net/tracker/index.php?func=detail&aid=14700
> 41&group_id=7586&atid=107586
> 
> The easiest workaround is to build the regex lib with /Zc:wchar_t-
> 
> HTH, John. 

Thanks, just compiling with /Zc:wchar_t- didn't help in my case, however
I noticed that one message in the above thread indicated to add

template<> _CRTIMP2 std::size_t __cdecl char_traits<unsigned
short>::length(unsigned short const*);

This brought the linker errors down to just one, so in a similar
fashion, I added:

template<> __thiscall std::allocator<unsigned short>::allocator(void);

Which enabled me to build my project successfully.

Regards,
Simon