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Re: C++, dlopen() and undefined __pure_virtual


On Fri, Apr 23, 2004 at 09:38:36PM +0530, Banibrata Dutta wrote:
> Okay. My apolgies to you all including HJ.
> I did try this immediately after getting HJ's mail,
> but what i get is the following:
> 
> g++ -shared -soname libxyz.so -o libxyz.so -lc X.o -lc Y.o -lc Z.o -lc A.o
> -lc B.o -lc C.o -lpthread -lm -ldl
> g++: libxyz.so: No such file or directory
> g++: unrecognized option `-soname'
> make: *** [libxyz.so] Error 1

-Wl,-soname,libxyz.so.  You can drop the explicit -lc references also.

> 
> regards,
> bdutta
> 
> > -----Original Message-----
> > From: binutils-owner@sources.redhat.com 
> > [mailto:binutils-owner@sources.redhat.com] On Behalf Of 
> > Daniel Jacobowitz
> > Sent: Friday, April 23, 2004 9:32 PM
> > To: Banibrata Dutta
> > Cc: 'H. J. Lu'; binutils@sources.redhat.com
> > Subject: Re: C++, dlopen() and undefined __pure_virtual
> > 
> > 
> > On Fri, Apr 23, 2004 at 09:30:58PM +0530, Banibrata Dutta wrote:
> > > Hi H.J.:
> > > 
> > > I am certainly running Linux (actually RH AS-2.1).
> > > I think the "ld" would work fine because what i am doing is just 
> > > liking the objects in to create the shared library. Infact 
> > I remember 
> > > having tested the process of ".so" creation using ld 
> > previously. The 
> > > problem, I feel is elsewhere...
> > > 
> > > Thanks for the quick response.
> > 
> > No, HJ is right.  You can not use ld to link shared libraries 
> > and expect things to work correctly.  You're missing options 
> > and extra code that g++ would add to the shared library - 
> > including __pure_virtual.
> > 
> > -- 
> > Daniel Jacobowitz
> > MontaVista Software                         Debian GNU/Linux Developer
> > 
> 
> 

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer


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