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RE: Link errors related to vtable
- From: George <zingafriend at yahoo dot com>
- To: cygwin at cygwin dot com
- Date: Tue, 16 Jan 2007 02:18:00 -0800 (PST)
- Subject: RE: Link errors related to vtable
Or, since I am suspecting this might be a problem with
the gnu c++ compiler ver 3.4.4 which is there in the
cygwin 1.5.23 is there a way that I can download the
4.1 version of the c++ compiler which might solve the
--- George <email@example.com> wrote:
> Hi Dave,
> I am sorry as I am new to c++ I need more help in
> doing what you said is required.
> --- Dave Korn <firstname.lastname@example.org> wrote:
> > On 10 January 2007 13:04, Eric Blake wrote:
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > According to George on 1/9/2007 11:02 PM:
> > >> Hi,
> > >> I am getting link errors like below when I
> > compile my
> > >> code(systemc) which is on cygwin 1.5.23 with
> > >> 3.4.4
> > >> (systemc is a c++ class library)
> > >
> > > No wonder. C++ code MUST be compiled with g++,
> > not gcc (unless you REALLY
> > > know what you are doing).
> > I guess George does, since...
> > On 10 January 2007 06:03, George wrote:
> > >
> > > g++ -O3 -Wall -I. -I.. -I../../../include -L.
> > > -L../../../lib-linux -o run.x packet.o
> > > packet_generator.o hub.o main.o -lsystemc -lm
> > 2>&1 |
> > > c++filt
> > >
> > fo::packet_fifo(sc_core::sc_module_name)]+0x91):
> > > undefined reference to `VTT for packet_fifo'
> > George, this will be hard for me to diagnose
> > without an STC. The first
> > thing you should do is read "6.4 Vague Linkage" in
> > the gcc manual which
> > explains how and when gcc decides to emit the
> > for a class; then try
> > running nm over the object files and seeing if
> > there in the expected one
> > or not. Maybe there's a link-ordering problem or
> > something.
> > If you can produce an STC based only on snippets
> > of main and packet_fifo I'd
> > be able to figure it out in more detail.
> > cheers,
> > DaveK
> > --
> > Can't think of a witty .sigline today....
> > --
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