Re: /libexec/ld-elf.so.1: ... Undefined symbol "_ZN7TMinuitC1Ei"

Hi Pierre-Luc,

On Thu, 2005-05-26 at 12:00 -0400, Pierre-Luc Drouin wrote:
> I have some code that uses Root classes and that I load in Root as a
> shared library with command gSystem->Load("libqsigex.so"). When I use some
> of my classes it works fine but it crashes with the following error when
> another of my classes tries to use Minuit:
>
> /libexec/ld-elf.so.1: /home/pldrouin/work/qsigex_new/lib/libqsigex.so:
> Undefined symbol "_ZN7TMinuitC1Ei"

This is a reference to `TMinuit::TMinuit(int)' (try doing `c++filt _ZN7TMinuitC1Ei'). Are you sure you have `libMinuit' loaded?

If `libMiniut' is loaded, check that you can create an object using the above CTOR. Also check that the symbol is defined by doing

        nm -C libMinuit.so | grep TMinuit::TMinuit

> I get this error with FreeBSD 5.4-STABLE. I compile Root with gcc 3.4.2. I
> get the error with the current CVS Root code and also with Root 4.04.02. I
> don't get this error on a RedHat Linux box running gcc 3.2

The reason you do not see it on GNU/Linux is perhaps that your library pulls in libMinut on its own (your library is linked against libMinut - which it shouldn't be btw. as libMinuit is really a plugin.)

Yours,

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