[vtk-developers] certain libraries included twice

[David Gobbi]

Thanks for the info, Ken.  Perhaps I'll give up on gcc-2.95 (though
it's served me well for years now) and switch to gcc-2.96-85 or
to one of the other 3.x flavours of gcc.

 - David


On Fri, 24 May 2002, Ken Martin wrote:

> Brad and I checked into this recently. The problem is that some versions
> of gcc have a wacked out issue with the math library and cannot handle
> the math library coming before some internal libraies. So the
> linker/compiler actually searches for -lm in your link line and removes
> it and then puts it where it wants it (after some of the run time c++
> lib stuff). The problem is that it only searches for one copy of -lm and
> if there are two only one gets moved. In a nutshell that version of gcc
> is broken but ... we have to live with it. So VTK's CMakeLists files
> should be modified to deal with the issue. I think once CMake 1.4 is out
> we will overhaul the VTK development tree's makefiles and clean up this
> issue.
>
> Ken
>
>
> At 03:54 PM 5/24/2002 -0400, David Gobbi wrote:
> >Thanks Bill, Andy,
> >
> >I'll hack my makefiles for now.  Rebuilding my glibc isn't really an
> >option (or at least not one I'm willing to consider ;).  If I get any
> >additional insights into why the g++ linker is barfing on the double
> -lm
> >I'll report back.
> >
> > - David
> >
> >
> >On Fri, 24 May 2002, Bill Hoffman wrote:
> >
> >> cmake now keeps track of which libraries are used by a library and
> adds them to a link line.
> >> Since -lm and -lpthreads are done at the top of vtk all libraries
> need them.  The get repeated because if a library needs a library it
> must come after it on the link line.
> >>
> >> Anyway, you should be able to repeat -lm without this problem.
> >>
> >> I did a quick google search, and found this:
> >>
> >> > Yesterday, I attempted to play with KDE 2.2Beta. During the
> compilation of the multimedia package, I get an error sayinhg that the >
> linker cannot create application becuase clog@@GLIBC_2.1 cannot be
> found... Rebuild your glibc, and this time don't include the
> --disable-versioning or --enable-oldest-abi flags.
> >>
> >>
> >> At 03:27 PM 5/24/2002 -0400, David Gobbi wrote:
> >> >Hi All,
> >> >
> >> >I've been having a funny build problem for the past week, I was
> hoping
> >> >that it would vanish on its own but it hasn't.  I'm on linux (redhat
> 7.1)
> >> >with gcc-2.95.3 rather than the default gcc-2.96-85.
> >> >
> >> >In every link line I have -lm appear twice, and (for some unknown
> reason)
> >> >this leads to the following link error:
> >> >   undefined versioned symbol name clog@@GLIBC_2.1
> >> >
> >> >So my questions are
> >> > 1) Has anyone else seen a similar problem?
> >> > 2) Why does cmake list several libraries (-lpthread, -ldl, -lm)
> twice
> >> >    when it links the shared libraries?
> >> >
> >> > - David
> >> >
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> >>
> >
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